zlib 1.2.2.1

zlib 1.2.2
zlib 1.2.1.2
2011-09-09 23:24:24 -07:00 · 2011-09-09 23:24:02 -07:00 · 2011-09-09 23:23:45 -07:00 · 2011-09-09 23:23:38 -07:00 · 2011-09-09 23:23:27 -07:00 · 2011-09-09 23:23:14 -07:00
109 changed files with 8778 additions and 2027 deletions
--- a/111
+++ b/111
@@ -1,8 +1,117 @@

                ChangeLog file for zlib

+Changes in 1.2.2.1 (31 October 2004)
+- Allow inflateSetDictionary() call for raw inflate
+- Fix inflate header crc check bug for file names and comments
+- Add deflateSetHeader() and gz_header structure for custom gzip headers
+- Add inflateGetheader() to retrieve gzip headers
+- Add crc32_combine() and adler32_combine() functions
+- Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
+- Use zstreamp consistently in zlib.h (inflate_back functions)
+- Remove GUNZIP condition from definition of inflate_mode in inflate.h
+  and in contrib/inflate86/inffast.S [Truta, Anderson]
+- Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
+- Update projects/README.projects and projects/visualc6 [Truta]
+- Update win32/DLL_FAQ.txt [Truta]
+- Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
+- Deprecate Z_ASCII; use Z_TEXT instead [Truta]
+- Use a new algorithm for setting strm->data_type in trees.c [Truta]
+- Do not define an exit() prototype in zutil.c unless DEBUG defined
+- Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
+- Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
+
+Changes in 1.2.2 (3 October 2004)
+- Update zlib.h comments on gzip in-memory processing
+- Set adler to 1 in inflateReset() to support Java test suite [Walles]
+- Add contrib/dotzlib [Ravn]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update contrib/minizip [Vollant]
+- Move contrib/visual-basic.txt to old/ [Truta]
+- Fix assembler builds in projects/visualc6/ [Truta]
+
+Changes in 1.2.1.2 (9 September 2004)
+- Update INDEX file
+- Fix trees.c to update strm->data_type (no one ever noticed!)
+- Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
+- Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
+- Add limited multitasking protection to DYNAMIC_CRC_TABLE
+- Add NO_vsnprintf for VMS in zutil.h [Mozilla]
+- Don't declare strerror() under VMS [Mozilla]
+- Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
+- Update contrib/ada [Anisimkov]
+- Update contrib/minizip [Vollant]
+- Fix configure to not hardcode directories for Darwin [Peterson]
+- Fix gzio.c to not return error on empty files [Brown]
+- Fix indentation; update version in contrib/delphi/ZLib.pas and
+  contrib/pascal/zlibpas.pas [Truta]
+- Update mkasm.bat in contrib/masmx86 [Truta]
+- Update contrib/untgz [Truta]
+- Add projects/README.projects [Truta]
+- Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
+- Remove an unnecessary assignment to curr in inftrees.c [Truta]
+- Add OS/2 to exe builds in configure [Poltorak]
+- Remove err dummy parameter in zlib.h [Kientzle]
+
+Changes in 1.2.1.1 (9 January 2004)
+- Update email address in README
+- Several FAQ updates
+- Fix a big fat bug in inftrees.c that prevented decoding valid
+  dynamic blocks with only literals and no distance codes --
+  Thanks to "Hot Emu" for the bug report and sample file
+- Add a note to puff.c on no distance codes case.
+
+Changes in 1.2.1 (17 November 2003)
+- Remove a tab in contrib/gzappend/gzappend.c
+- Update some interfaces in contrib for new zlib functions
+- Update zlib version number in some contrib entries
+- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
+- Support shared libraries on Hurd and KFreeBSD [Brown]
+- Fix error in NO_DIVIDE option of adler32.c
+
+Changes in 1.2.0.8 (4 November 2003)
+- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
+- Add experimental NO_DIVIDE #define in adler32.c
+    - Possibly faster on some processors (let me know if it is)
+- Correct Z_BLOCK to not return on first inflate call if no wrap
+- Fix strm->data_type on inflate() return to correctly indicate EOB
+- Add deflatePrime() function for appending in the middle of a byte
+- Add contrib/gzappend for an example of appending to a stream
+- Update win32/DLL_FAQ.txt [Truta]
+- Delete Turbo C comment in README [Truta]
+- Improve some indentation in zconf.h [Truta]
+- Fix infinite loop on bad input in configure script [Church]
+- Fix gzeof() for concatenated gzip files [Johnson]
+- Add example to contrib/visual-basic.txt [Michael B.]
+- Add -p to mkdir's in Makefile.in [vda]
+- Fix configure to properly detect presence or lack of printf functions
+- Add AS400 support [Monnerat]
+- Add a little Cygwin support [Wilson]
+
+Changes in 1.2.0.7 (21 September 2003)
+- Correct some debug formats in contrib/infback9
+- Cast a type in a debug statement in trees.c
+- Change search and replace delimiter in configure from % to # [Beebe]
+- Update contrib/untgz to 0.2 with various fixes [Truta]
+- Add build support for Amiga [Nikl]
+- Remove some directories in old that have been updated to 1.2
+- Add dylib building for Mac OS X in configure and Makefile.in
+- Remove old distribution stuff from Makefile
+- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
+- Update links in README
+
+Changes in 1.2.0.6 (13 September 2003)
+- Minor FAQ updates
+- Update contrib/minizip to 1.00 [Vollant]
+- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
+- Update POSTINC comment for 68060 [Nikl]
+- Add contrib/infback9 with deflate64 decoding (unsupported)
+- For MVS define NO_vsnprintf and undefine FAR [van Burik]
+- Add pragma for fdopen on MVS [van Burik]
+
 Changes in 1.2.0.5 (8 September 2003)
- Add infback9 diffs to contrib
 - Add OF to inflateBackEnd() declaration in zlib.h
 - Remember start when using gzdopen in the middle of a file
 - Use internal off_t counters in gz* functions to properly handle seeks
--- a/91
+++ b/91
@@ -21,18 +21,18 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
 3. Where can I get a Visual Basic interface to zlib?

    See
-        * http://www.winimage.com/zLibDll/
        * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
        * contrib/visual-basic.txt in the zlib distribution
+        * win32/DLL_FAQ.txt in the zlib distribution

- 4. compress() returns Z_BUF_ERROR
+ 4. compress() returns Z_BUF_ERROR.

    Make sure that before the call of compress, the length of the compressed
    buffer is equal to the total size of the compressed buffer and not
    zero. For Visual Basic, check that this parameter is passed by reference
    ("as any"), not by value ("as long").

- 5. deflate() or inflate() returns Z_BUF_ERROR
+ 5. deflate() or inflate() returns Z_BUF_ERROR.

    Before making the call, make sure that avail_in and avail_out are not
    zero. When setting the parameter flush equal to Z_FINISH, also make sure
@@ -47,8 +47,8 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html

    It's in zlib.h for the moment, and Francis S. Lin has converted it to a
    web page zlib.html. Volunteers to transform this to Unix-style man pages,
-    please contact Jean-loup Gailly (jloup@gzip.org). Examples of zlib usage
-    are in the files example.c and minigzip.c.
+    please contact us (zlib@gzip.org). Examples of zlib usage are in the files
+    example.c and minigzip.c.

 7. Why don't you use GNU autoconf or libtool or ...?

@@ -73,12 +73,12 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html

 10. I need a Delphi interface to zlib.

-    See the directories contrib/delphi and contrib/delphi2 in the zlib
-    distribution.
+    See the contrib/delphi directory in the zlib distribution.

 11. Can zlib handle .zip archives?

-    See the directory contrib/minizip in the zlib distribution.
+    Not by itself, no.  See the directory contrib/minizip in the zlib
+    distribution.

 12. Can zlib handle .Z files?

@@ -93,6 +93,8 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html

 14. How do I install a shared zlib library on Unix?

+    After the above, then:
+
    make install

    However, many flavors of Unix come with a shared zlib already installed.
@@ -100,12 +102,31 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    trying to install it, you may want to check if it's already there! If you
    can #include <zlib.h>, it's there. The -lz option will probably link to it.

-15. I have a question about OttoPDF
+15. I have a question about OttoPDF.

    We are not the authors of OttoPDF. The real author is on the OttoPDF web
-    site Joel Hainley jhainley@myndkryme.com.
+    site: Joel Hainley, jhainley@myndkryme.com.

-16. Why does gzip give an error on a file I make with compress/deflate?
+16. Can zlib decode Flate data in an Adobe PDF file?
+
+    Yes. See http://www.fastio.com/ (ClibPDF), or http://www.pdflib.com/ .
+    To modify PDF forms, see http://sourceforge.net/projects/acroformtool/ .
+
+17. Why am I getting this "register_frame_info not found" error on Solaris?
+
+    After installing zlib 1.1.4 on Solaris 2.6, running applications using zlib
+    generates an error such as:
+
+        ld.so.1: rpm: fatal: relocation error: file /usr/local/lib/libz.so:
+        symbol __register_frame_info: referenced symbol not found
+
+    The symbol __register_frame_info is not part of zlib, it is generated by
+    the C compiler (cc or gcc). You must recompile applications using zlib
+    which have this problem. This problem is specific to Solaris. See
+    http://www.sunfreeware.com for Solaris versions of zlib and applications
+    using zlib.
+
+18. Why does gzip give an error on a file I make with compress/deflate?

    The compress and deflate functions produce data in the zlib format, which
    is different and incompatible with the gzip format. The gz* functions in
@@ -113,7 +134,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    formats use the same compressed data format internally, but have different
    headers and trailers around the compressed data.

-17. Ok, so why are there two different formats?
+19. Ok, so why are there two different formats?

    The gzip format was designed to retain the directory information about
    a single file, such as the name and last modification date. The zlib
@@ -121,7 +142,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    channel applications, and has a much more compact header and trailer and
    uses a faster integrity check than gzip.

-18. Well that's nice, but how do I make a gzip file in memory?
+20. Well that's nice, but how do I make a gzip file in memory?

    You can request that deflate write the gzip format instead of the zlib
    format using deflateInit2(). You can also request that inflate decode
@@ -134,7 +155,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    function and roll your own gzip encoding and decoding. Read the gzip
    RFC 1952 for details of the header and trailer format.

-19. Is zlib thread-safe?
+21. Is zlib thread-safe?

    Yes. However any library routines that zlib uses and any application-
    provided memory allocation routines must also be thread-safe. zlib's gz*
@@ -145,15 +166,15 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    Of course, you should only operate on any given zlib or gzip stream from a
    single thread at a time.

-20. Can I use zlib in my commercial application?
+22. Can I use zlib in my commercial application?

    Yes. Please read the license in zlib.h.

-21. Is zlib under the GNU license?
+23. Is zlib under the GNU license?

    No. Please read the license in zlib.h.

-22. The license says that altered source versions must be "plainly marked". So
+24. The license says that altered source versions must be "plainly marked". So
    what exactly do I need to do to meet that requirement?

    You need to change the ZLIB_VERSION and ZLIB_VERNUM #defines in zlib.h. In
@@ -176,24 +197,24 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    ZLIB_VERSION and ZLIB_VERNUM and note the origin and nature of the changes
    in zlib.h as you would for a full source distribution.

-23. Will zlib work on a big-endian or little-endian architecture, and can I
+25. Will zlib work on a big-endian or little-endian architecture, and can I
    exchange compressed data between them?

    Yes and yes.

-24. Will zlib work on a 64-bit machine?
+26. Will zlib work on a 64-bit machine?

    It should. It has been tested on 64-bit machines, and has no dependence
    on any data types being limited to 32-bits in length. If you have any
    difficulties, please provide a complete problem report to zlib@gzip.org

-25. Will zlib decompress data from the PKWare Data Compression Library?
+27. Will zlib decompress data from the PKWare Data Compression Library?

    No. The PKWare DCL uses a completely different compressed data format
    than does PKZIP and zlib. However, you can look in zlib's contrib/blast
    directory for a possible solution to your problem.

-26. Can I access data randomly in a compressed stream?
+28. Can I access data randomly in a compressed stream?

    No, not without some preparation. If when compressing you periodically
    use Z_FULL_FLUSH, carefully write all the pending data at those points,
@@ -201,27 +222,27 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    at those points. You have to be careful to not use Z_FULL_FLUSH too
    often, since it can significantly degrade compression.

-27. Does zlib work on MVS, OS/390, CICS, etc.?
+29. Does zlib work on MVS, OS/390, CICS, etc.?

    We don't know for sure. We have heard occasional reports of success on
    these systems. If you do use it on one of these, please provide us with
    a report, instructions, and patches that we can reference when we get
    these questions. Thanks.

-28. Is there some simpler, easier to read version of inflate I can look at
+30. Is there some simpler, easier to read version of inflate I can look at
    to understand the deflate format?

    First off, you should read RFC 1951. Second, yes. Look in zlib's
    contrib/puff directory.

-29. Does zlib infringe on any patents?
+31. Does zlib infringe on any patents?

    As far as we know, no. In fact, that was originally the whole point behind
    zlib. Look here for some more information:

    http://www.gzip.org/#faq11

-30. Can zlib work with greater than 4 GB of data?
+32. Can zlib work with greater than 4 GB of data?

    Yes. inflate() and deflate() will process any amount of data correctly.
    Each call of inflate() or deflate() is limited to input and output chunks
@@ -239,7 +260,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    only if the compiler's "long" type is 32 bits. If the compiler's "long"
    type is 64 bits, then the limit is 16 exabytes.

-31. Does zlib have any security vulnerabilities?
+33. Does zlib have any security vulnerabilities?

    The only one that we are aware of is potentially in gzprintf(). If zlib
    is compiled to use sprintf() or vsprintf(), then there is no protection
@@ -259,35 +280,35 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
    Note that you should be using the most recent version of zlib. Versions
    1.1.3 and before were subject to a double-free vulnerability.

-32. Is there a Java version of zlib?
+34. Is there a Java version of zlib?

    Probably what you want is to use zlib in Java. zlib is already included
    as part of the Java SDK in the java.util.zip package. If you really want
    a version of zlib written in the Java language, look on the zlib home
    page for links: http://www.zlib.org/

-33. I get this or that compiler or source-code scanner warning when I crank it
-    up to maximally-pendantic. Can't you guys write proper code?
+35. I get this or that compiler or source-code scanner warning when I crank it
+    up to maximally-pedantic. Can't you guys write proper code?

    Many years ago, we gave up attempting to avoid warnings on every compiler
    in the universe. It just got to be a waste of time, and some compilers
    were downright silly. So now, we simply make sure that the code always
    works.

-34. Will zlib read the (insert any ancient or arcane format here) compressed
+36. Will zlib read the (insert any ancient or arcane format here) compressed
    data format?

    Probably not. Look in the comp.compression FAQ for pointers to various
    formats and associated software.

-35. How can I encrypt/decrypt zip files with zlib?
+37. How can I encrypt/decrypt zip files with zlib?

    zlib doesn't support encryption. The original PKZIP encryption is very weak
    and can be broken with freely available programs. To get strong encryption,
-    use gpg ( http://www.gnupg.org/ ) which already includes zlib compression.
+    use GnuPG, http://www.gnupg.org/ , which already includes zlib compression.
    For PKZIP compatible "encryption", look at http://www.info-zip.org/

-36. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
+38. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?

    "gzip" is the gzip format, and "deflate" is the zlib format. They should
    probably have called the second one "zlib" instead to avoid confusion
@@ -303,14 +324,14 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html

    Bottom line: use the gzip format for HTTP 1.1 encoding.

-37. Does zlib support the new "Deflate64" format introduced by PKWare?
+39. Does zlib support the new "Deflate64" format introduced by PKWare?

    No. PKWare has apparently decided to keep that format proprietary, since
    they have not documented it as they have previous compression formats.
    In any case, the compression improvements are so modest compared to other
    more modern approaches, that it's not worth the effort to implement.

-38. Can you please sign these lengthy legal documents and fax them back to us
+40. Can you please sign these lengthy legal documents and fax them back to us
    so that we can use your software in our product?

    No. Go away. Shoo.
--- a/3
+++ b/3
@@ -8,9 +8,12 @@ algorithm.txt   description of the (de)compression algorithm
 configure       configure script for Unix
 zconf.in.h      template for zconf.h (used by configure)

+amiga/          makefiles for Amiga SAS C
+as400/          makefiles for IBM AS/400
 msdos/          makefiles for MSDOS
 old/            makefiles for various architectures and zlib documentation
                files that have not yet been updated for zlib 1.2.x
+projects/       projects for various Integrated Development Environments
 qnx/            makefiles for QNX
 win32/          makefiles for Windows

--- a/81
+++ b/81
@@ -28,14 +28,16 @@ LDFLAGS=libz.a
 LDSHARED=$(CC)
 CPP=$(CC) -E

-VER=1.2.0.5
 LIBS=libz.a
 SHAREDLIB=libz.so
+SHAREDLIBV=libz.so.1.2.2.1
+SHAREDLIBM=libz.so.1

 AR=ar rc
 RANLIB=ranlib
 TAR=tar
 SHELL=/bin/sh
+EXE=

 prefix = /usr/local
 exec_prefix = ${prefix}
@@ -52,20 +54,7 @@ OBJA =

 TEST_OBJS = example.o minigzip.o

-# Note: this has not been updated for zlib 1.2.0
-DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
-  algorithm.txt zlib.3 zlib.html \
-  msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
-  nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
-  contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
-  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
-  contrib/asm[56]86/*.S contrib/iostream/*.cpp \
-  contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
-  contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32 \
-  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]?? \
-  contrib/delphi*/*.???
-
-all: example minigzip
+all: example$(EXE) minigzip$(EXE)

 check: test
 test: all
@@ -88,32 +77,32 @@ match.o: match.S
 	mv _match.o match.o
 	rm -f _match.s

-$(SHAREDLIB).$(VER): $(OBJS)
+$(SHAREDLIBV): $(OBJS)
 	$(LDSHARED) -o $@ $(OBJS)
-	rm -f $(SHAREDLIB) $(SHAREDLIB).1
+	rm -f $(SHAREDLIB) $(SHAREDLIBM)
 	ln -s $@ $(SHAREDLIB)
-	ln -s $@ $(SHAREDLIB).1
+	ln -s $@ $(SHAREDLIBM)

-example: example.o $(LIBS)
+example$(EXE): example.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)

-minigzip: minigzip.o $(LIBS)
+minigzip$(EXE): minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)

 install: $(LIBS)
-	-@if [ ! -d $(exec_prefix) ]; then mkdir $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
-	-@if [ ! -d $(libdir)      ]; then mkdir $(libdir); fi
-	-@if [ ! -d $(man3dir)     ]; then mkdir $(man3dir); fi
+	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
+	-@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
+	-@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
+	-@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
 	cp zlib.h zconf.h $(includedir)
 	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
 	cp $(LIBS) $(libdir)
 	cd $(libdir); chmod 755 $(LIBS)
 	-@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
-	cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
-	  rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
-	  ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB); \
-	  ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB).1; \
+	cd $(libdir); if test -f $(SHAREDLIBV); then \
+	  rm -f $(SHAREDLIB) $(SHAREDLIBM); \
+	  ln -s $(SHAREDLIBV) $(SHAREDLIB); \
+	  ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
 	  (ldconfig || true)  >/dev/null 2>&1; \
 	fi
 	cp zlib.3 $(man3dir)
@@ -123,21 +112,17 @@ install: $(LIBS)

 uninstall:
 	cd $(includedir); \
-	v=$(VER); \
-	if test -f zlib.h; then \
-	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
-          rm -f zlib.h zconf.h; \
-	fi; \
 	cd $(libdir); rm -f libz.a; \
-	if test -f $(SHAREDLIB).$$v; then \
-	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
+	if test -f $(SHAREDLIBV); then \
+	  rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
 	fi
 	cd $(man3dir); rm -f zlib.3

 mostlyclean: clean
 clean:
-	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz so_locations \
-	   _match.s maketree
+	rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+	   libz.* foo.gz so_locations \
+	   _match.s maketree contrib/infback9/*.o

 maintainer-clean: distclean
 distclean: clean
@@ -145,28 +130,6 @@ distclean: clean
 	cp -p zconf.in.h zconf.h
 	rm -f .DS_Store

-zip:
-	echo Warning: this has not been updated for zlib 1.2.0 -- do not use
-	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	rm -f test.c ztest*.c contrib/minizip/test.zip
-	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
-	zip -ul9 zlib$$v $(DISTFILES)
-	mv Makefile~ Makefile
-
-dist:
-	echo Warning: this has not been updated for zlib 1.2.0 -- do not use
-	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	rm -f test.c ztest*.c contrib/minizip/test.zip
-	d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
-	rm -f $$d.tar.gz; \
-	if test ! -d ../$$d; then rm -f ../$$d; ln -s `pwd` ../$$d; fi; \
-	files=""; \
-	for f in $(DISTFILES); do files="$$files $$d/$$f"; done; \
-	cd ..; \
-	GZIP=-9 $(TAR) chofz $$d/$$d.tar.gz $$files; \
-	if test ! -d $$d; then rm -f $$d; fi
-	mv Makefile~ Makefile
-
 tags:
 	etags *.[ch]

--- a/Makefile.in
+++ b/Makefile.in
@@ -28,14 +28,16 @@ LDFLAGS=libz.a
 LDSHARED=$(CC)
 CPP=$(CC) -E

-VER=1.2.0.5
 LIBS=libz.a
 SHAREDLIB=libz.so
+SHAREDLIBV=libz.so.1.2.2.1
+SHAREDLIBM=libz.so.1

 AR=ar rc
 RANLIB=ranlib
 TAR=tar
 SHELL=/bin/sh
+EXE=

 prefix = /usr/local
 exec_prefix = ${prefix}
@@ -52,20 +54,7 @@ OBJA =

 TEST_OBJS = example.o minigzip.o

-# Note: this has not been updated for zlib 1.2.0
-DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
-  algorithm.txt zlib.3 zlib.html \
-  msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
-  nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
-  contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
-  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
-  contrib/asm[56]86/*.S contrib/iostream/*.cpp \
-  contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
-  contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32 \
-  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]?? \
-  contrib/delphi*/*.???
-
-all: example minigzip
+all: example$(EXE) minigzip$(EXE)

 check: test
 test: all
@@ -88,32 +77,32 @@ match.o: match.S
 	mv _match.o match.o
 	rm -f _match.s

-$(SHAREDLIB).$(VER): $(OBJS)
+$(SHAREDLIBV): $(OBJS)
 	$(LDSHARED) -o $@ $(OBJS)
-	rm -f $(SHAREDLIB) $(SHAREDLIB).1
+	rm -f $(SHAREDLIB) $(SHAREDLIBM)
 	ln -s $@ $(SHAREDLIB)
-	ln -s $@ $(SHAREDLIB).1
+	ln -s $@ $(SHAREDLIBM)

-example: example.o $(LIBS)
+example$(EXE): example.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)

-minigzip: minigzip.o $(LIBS)
+minigzip$(EXE): minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)

 install: $(LIBS)
-	-@if [ ! -d $(exec_prefix) ]; then mkdir $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
-	-@if [ ! -d $(libdir)      ]; then mkdir $(libdir); fi
-	-@if [ ! -d $(man3dir)     ]; then mkdir $(man3dir); fi
+	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
+	-@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
+	-@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
+	-@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
 	cp zlib.h zconf.h $(includedir)
 	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
 	cp $(LIBS) $(libdir)
 	cd $(libdir); chmod 755 $(LIBS)
 	-@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
-	cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
-	  rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
-	  ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB); \
-	  ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB).1; \
+	cd $(libdir); if test -f $(SHAREDLIBV); then \
+	  rm -f $(SHAREDLIB) $(SHAREDLIBM); \
+	  ln -s $(SHAREDLIBV) $(SHAREDLIB); \
+	  ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
 	  (ldconfig || true)  >/dev/null 2>&1; \
 	fi
 	cp zlib.3 $(man3dir)
@@ -123,21 +112,17 @@ install: $(LIBS)

 uninstall:
 	cd $(includedir); \
-	v=$(VER); \
-	if test -f zlib.h; then \
-	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
-          rm -f zlib.h zconf.h; \
-	fi; \
 	cd $(libdir); rm -f libz.a; \
-	if test -f $(SHAREDLIB).$$v; then \
-	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
+	if test -f $(SHAREDLIBV); then \
+	  rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
 	fi
 	cd $(man3dir); rm -f zlib.3

 mostlyclean: clean
 clean:
-	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz so_locations \
-	   _match.s maketree
+	rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+	   libz.* foo.gz so_locations \
+	   _match.s maketree contrib/infback9/*.o

 maintainer-clean: distclean
 distclean: clean
@@ -145,28 +130,6 @@ distclean: clean
 	cp -p zconf.in.h zconf.h
 	rm -f .DS_Store

-zip:
-	echo Warning: this has not been updated for zlib 1.2.0 -- do not use
-	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	rm -f test.c ztest*.c contrib/minizip/test.zip
-	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
-	zip -ul9 zlib$$v $(DISTFILES)
-	mv Makefile~ Makefile
-
-dist:
-	echo Warning: this has not been updated for zlib 1.2.0 -- do not use
-	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	rm -f test.c ztest*.c contrib/minizip/test.zip
-	d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
-	rm -f $$d.tar.gz; \
-	if test ! -d ../$$d; then rm -f ../$$d; ln -s `pwd` ../$$d; fi; \
-	files=""; \
-	for f in $(DISTFILES); do files="$$files $$d/$$f"; done; \
-	cd ..; \
-	GZIP=-9 $(TAR) chofz $$d/$$d.tar.gz $$files; \
-	if test ! -d $$d; then rm -f $$d; fi
-	mv Makefile~ Makefile
-
 tags:
 	etags *.[ch]

--- a/38
+++ b/38
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY

-zlib 1.2.0.5 is a general purpose data compression library.  All the code is
+zlib 1.2.2.1 is a general purpose data compression library.  All the code is
 thread safe.  The data format used by the zlib library is described by RFCs
 (Request for Comments) 1950 to 1952 in the files
 http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
@@ -8,7 +8,7 @@ and rfc1952.txt (gzip format). These documents are also available in other
 formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html

 All functions of the compression library are documented in the file zlib.h
-(volunteer to write man pages welcome, contact jloup@gzip.org). A usage example
+(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
 of the library is given in the file example.c which also tests that the library
 is working correctly. Another example is given in the file minigzip.c. The
 compression library itself is composed of all source files except example.c and
@@ -34,43 +34,33 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
 issue of  Dr. Dobb's Journal; a copy of the article is available in
 http://dogma.net/markn/articles/zlibtool/zlibtool.htm

-The changes made in version 1.2.0.5 are documented in the file ChangeLog.
+The changes made in version 1.2.2.1 are documented in the file ChangeLog.

 Unsupported third party contributions are provided in directory "contrib".

 A Java implementation of zlib is available in the Java Development Kit
-http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
+http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
 See the zlib home page http://www.zlib.org for details.

 A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
 CPAN (Comprehensive Perl Archive Network) sites
 http://www.cpan.org/modules/by-module/Compress/

-A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> is
+A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
 available in Python 1.5 and later versions, see
 http://www.python.org/doc/lib/module-zlib.html

 A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
-availlable at http://www.westend.com/~kupries/doc/trf/man/man.html
+availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html

 An experimental package to read and write files in .zip format, written on top
-of zlib by Gilles Vollant <info@winimage.com>, is available at
-http://www.winimage.com/zLibDll/unzip.html and also in the contrib/minizip
-directory of zlib.
+of zlib by Gilles Vollant <info@winimage.com>, is available in the
+contrib/minizip directory of zlib.


 Notes for some targets:

- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
-  and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL The
-  zlib DLL support was initially done by Alessandro Iacopetti and is now
-  maintained by Gilles Vollant <info@winimage.com>. Check the zlib DLL home
-  page at http://www.winimage.com/zLibDll
-
-  From Visual Basic, you can call the DLL functions which do not take a
-  structure as argument: compress, uncompress and all gz* functions. See
-  contrib/visual-basic.txt for more information, or get
-  http://www.tcfb.com/dowseware/cmp-z-it.zip
+- For Windows DLL versions, please see win32/DLL_FAQ.txt

 - For 64-bit Irix, deflate.c must be compiled without any optimization. With
  -O, one libpng test fails. The test works in 32 bit mode (with the -n32
@@ -87,11 +77,11 @@ Notes for some targets:

 - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.

- For Turbo C the small model is supported only with reduced performance to
-  avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
+- For PalmOs, see http://palmzlib.sourceforge.net/

- For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html Per
-  Harald Myrvang <perm@stud.cs.uit.no>
+- When building a shared, i.e. dynamic library on Mac OS X, the library must be
+  installed before testing (do "make install" before "make test"), since the
+  library location is specified in the library.


 Acknowledgments:
@@ -103,7 +93,7 @@ Acknowledgments:

 Copyright notice:

- (C) 1995-2003 Jean-loup Gailly and Mark Adler
+ (C) 1995-2004 Jean-loup Gailly and Mark Adler

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
--- a/adler32.c
+++ b/adler32.c
@@ -1,5 +1,5 @@
 /* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -8,7 +8,7 @@
 #define ZLIB_INTERNAL
 #include "zlib.h"

-#define BASE 65521L /* largest prime smaller than 65536 */
+#define BASE 65521UL    /* largest prime smaller than 65536 */
 #define NMAX 5552
 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */

@@ -18,6 +18,31 @@
 #define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
 #define DO16(buf)   DO8(buf,0); DO8(buf,8);

+#ifdef NO_DIVIDE
+#  define MOD(a) \
+    do { \
+        if (a >= (BASE << 16)) a -= (BASE << 16); \
+        if (a >= (BASE << 15)) a -= (BASE << 15); \
+        if (a >= (BASE << 14)) a -= (BASE << 14); \
+        if (a >= (BASE << 13)) a -= (BASE << 13); \
+        if (a >= (BASE << 12)) a -= (BASE << 12); \
+        if (a >= (BASE << 11)) a -= (BASE << 11); \
+        if (a >= (BASE << 10)) a -= (BASE << 10); \
+        if (a >= (BASE << 9)) a -= (BASE << 9); \
+        if (a >= (BASE << 8)) a -= (BASE << 8); \
+        if (a >= (BASE << 7)) a -= (BASE << 7); \
+        if (a >= (BASE << 6)) a -= (BASE << 6); \
+        if (a >= (BASE << 5)) a -= (BASE << 5); \
+        if (a >= (BASE << 4)) a -= (BASE << 4); \
+        if (a >= (BASE << 3)) a -= (BASE << 3); \
+        if (a >= (BASE << 2)) a -= (BASE << 2); \
+        if (a >= (BASE << 1)) a -= (BASE << 1); \
+        if (a >= BASE) a -= BASE; \
+    } while (0)
+#else
+#  define MOD(a) a %= BASE
+#endif
+
 /* ========================================================================= */
 uLong ZEXPORT adler32(adler, buf, len)
    uLong adler;
@@ -42,8 +67,30 @@ uLong ZEXPORT adler32(adler, buf, len)
            s1 += *buf++;
            s2 += s1;
        } while (--k);
-        s1 %= BASE;
-        s2 %= BASE;
+        MOD(s1);
+        MOD(s2);
    }
    return (s2 << 16) | s1;
 }
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_combine(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    uLong len2;
+{
+    unsigned long s1;
+    unsigned long s2;
+
+    len2 %= BASE;
+    s1 = adler1 & 0xffff;
+    s2 = len2 * s1;
+    MOD(s2);
+    s1 += (adler2 & 0xffff) + BASE - 1;
+    s2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - len2;
+    if (s1 > BASE) s1 -= BASE;
+    if (s1 > BASE) s1 -= BASE;
+    if (s2 > (BASE << 1)) s2 -= (BASE << 1);
+    if (s2 > BASE) s2 -= BASE;
+    return (s2 << 16) | s1;
+}
--- a/amiga/Makefile.pup
+++ b/amiga/Makefile.pup
@@ -0,0 +1,66 @@
+# Amiga powerUP (TM) Makefile
+# makefile for libpng and SAS C V6.58/7.00 PPC compiler
+# Copyright (C) 1998 by Andreas R. Kleinert
+
+LIBNAME	= libzip.a
+
+CC	= scppc
+CFLAGS	= NOSTKCHK NOSINT OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL \
+	  OPTLOOP OPTRDEP=8 OPTDEP=8 OPTCOMP=8 NOVER
+AR	= ppc-amigaos-ar cr
+RANLIB	= ppc-amigaos-ranlib
+LD	= ppc-amigaos-ld -r
+LDFLAGS	= -o
+LDLIBS	= LIB:scppc.a LIB:end.o
+RM	= delete quiet
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+       zutil.o inflate.o infback.o inftrees.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example minigzip
+
+check: test
+test: all
+	example
+	echo hello world | minigzip | minigzip -d
+
+$(LIBNAME): $(OBJS)
+	$(AR) $@ $(OBJS)
+	-$(RANLIB) $@
+
+example: example.o $(LIBNAME)
+	$(LD) $(LDFLAGS) $@ LIB:c_ppc.o $@.o $(LIBNAME) $(LDLIBS)
+
+minigzip: minigzip.o $(LIBNAME)
+	$(LD) $(LDFLAGS) $@ LIB:c_ppc.o $@.o $(LIBNAME) $(LDLIBS)
+
+mostlyclean: clean
+clean:
+	$(RM) *.o example minigzip $(LIBNAME) foo.gz
+
+zip:
+	zip -ul9 zlib README ChangeLog Makefile Make????.??? Makefile.?? \
+	  descrip.mms *.[ch]
+
+tgz:
+	cd ..; tar cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile \
+	  zlib/Make????.??? zlib/Makefile.?? zlib/descrip.mms zlib/*.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
--- a/old/amiga/Makefile.sas
+++ b/old/amiga/Makefile.sas
@@ -10,22 +10,24 @@ CFLAGS=OPT
 LDFLAGS=LIB z.lib

 SCOPTIONS=OPTSCHED OPTINLINE OPTALIAS OPTTIME OPTINLOCAL STRMERGE \
-       NOICONS PARMS=BOTH NOSTACKCHECK UTILLIB NOVERSION ERRORREXX 
+       NOICONS PARMS=BOTH NOSTACKCHECK UTILLIB NOVERSION ERRORREXX \
+       DEF=POSTINC

 OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
-       zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+       zutil.o inflate.o infback.o inftrees.o inffast.o

 TEST_OBJS = example.o minigzip.o

 all: SCOPTIONS example minigzip

+check: test
 test: all
-	`cd`/example
+	example
 	echo hello world | minigzip | minigzip -d 

 install: z.lib
-	copy zlib.h zconf.h INCLUDE: clone
-	copy z.lib LIB: clone
+	copy clone zlib.h zconf.h INCLUDE:
+	copy clone z.lib LIB:

 z.lib: $(OBJS)
 	oml z.lib r $(OBJS)
@@ -36,29 +38,28 @@ example: example.o z.lib
 minigzip: minigzip.o z.lib
 	$(CC) $(CFLAGS) LINK TO $@ minigzip.o $(LDFLAGS)

+mostlyclean: clean
 clean:
-	-delete force quiet *.o example minigzip z.lib foo.gz *.lnk SCOPTIONS
+	-delete force quiet example minigzip *.o z.lib foo.gz *.lnk SCOPTIONS

-SCOPTIONS: Smakefile
+SCOPTIONS: Makefile.sas
 	copy to $@ <from <
 $(SCOPTIONS)
 <

 # DO NOT DELETE THIS LINE -- make depend depends on it.

-adler32.o: zutil.h zlib.h zconf.h
+adler32.o: zlib.h zconf.h
 compress.o: zlib.h zconf.h
-crc32.o: zutil.h zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
 deflate.o: deflate.h zutil.h zlib.h zconf.h
 example.o: zlib.h zconf.h
 gzio.o: zutil.h zlib.h zconf.h
-infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
-infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
 inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
 minigzip.o: zlib.h zconf.h
-trees.o: deflate.h zutil.h zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
 uncompr.o: zlib.h zconf.h
 zutil.o: zutil.h zlib.h zconf.h
--- a/as400/bndsrc
+++ b/as400/bndsrc
@@ -0,0 +1,132 @@
+STRPGMEXP PGMLVL(*CURRENT) SIGNATURE('ZLIB')
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.1.3 entry points.                                    */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+/********************************************************************/
+/*   *MODULE      ADLER32      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("adler32")
+
+/********************************************************************/
+/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("compress")
+  EXPORT SYMBOL("compress2")
+
+/********************************************************************/
+/*   *MODULE      CRC32        ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("crc32")
+  EXPORT SYMBOL("get_crc_table")
+
+/********************************************************************/
+/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("deflate")
+  EXPORT SYMBOL("deflateEnd")
+  EXPORT SYMBOL("deflateSetDictionary")
+  EXPORT SYMBOL("deflateCopy")
+  EXPORT SYMBOL("deflateReset")
+  EXPORT SYMBOL("deflateParams")
+  EXPORT SYMBOL("deflatePrime")
+  EXPORT SYMBOL("deflateInit_")
+  EXPORT SYMBOL("deflateInit2_")
+
+/********************************************************************/
+/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("gzopen")
+  EXPORT SYMBOL("gzdopen")
+  EXPORT SYMBOL("gzsetparams")
+  EXPORT SYMBOL("gzread")
+  EXPORT SYMBOL("gzwrite")
+  EXPORT SYMBOL("gzprintf")
+  EXPORT SYMBOL("gzputs")
+  EXPORT SYMBOL("gzgets")
+  EXPORT SYMBOL("gzputc")
+  EXPORT SYMBOL("gzgetc")
+  EXPORT SYMBOL("gzflush")
+  EXPORT SYMBOL("gzseek")
+  EXPORT SYMBOL("gzrewind")
+  EXPORT SYMBOL("gztell")
+  EXPORT SYMBOL("gzeof")
+  EXPORT SYMBOL("gzclose")
+  EXPORT SYMBOL("gzerror")
+
+/********************************************************************/
+/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("inflate")
+  EXPORT SYMBOL("inflateEnd")
+  EXPORT SYMBOL("inflateSetDictionary")
+  EXPORT SYMBOL("inflateSync")
+  EXPORT SYMBOL("inflateReset")
+  EXPORT SYMBOL("inflateInit_")
+  EXPORT SYMBOL("inflateInit2_")
+  EXPORT SYMBOL("inflateSyncPoint")
+
+/********************************************************************/
+/*   *MODULE      UNCOMPR      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("uncompress")
+
+/********************************************************************/
+/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("zlibVersion")
+  EXPORT SYMBOL("zError")
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.2.1 additional entry points.                         */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+/********************************************************************/
+/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("compressBound")
+
+/********************************************************************/
+/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("deflateBound")
+
+/********************************************************************/
+/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("gzungetc")
+  EXPORT SYMBOL("gzclearerr")
+
+/********************************************************************/
+/*   *MODULE      INFBACK      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("inflateBack")
+  EXPORT SYMBOL("inflateBackEnd")
+  EXPORT SYMBOL("inflateBackInit_")
+
+/********************************************************************/
+/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("inflateCopy")
+
+/********************************************************************/
+/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("zlibCompileFlags")
+
+ENDPGMEXP
--- a/as400/compile.clp
+++ b/as400/compile.clp
@@ -0,0 +1,123 @@
+/******************************************************************************/
+/*                                                                            */
+/*  ZLIB                                                                      */
+/*                                                                            */
+/*    Compile sources into modules and link them into a service program.      */
+/*                                                                            */
+/******************************************************************************/
+
+             PGM
+
+/*      Configuration adjustable parameters.                                  */
+
+             DCL        VAR(&SRCLIB) TYPE(*CHAR) LEN(10) +
+                          VALUE('ZLIB')                         /* Source library. */
+             DCL        VAR(&SRCFILE) TYPE(*CHAR) LEN(10) +
+                          VALUE('SOURCES')                      /* Source member file. */
+             DCL        VAR(&CTLFILE) TYPE(*CHAR) LEN(10) +
+                          VALUE('TOOLS')                        /* Control member file. */
+
+             DCL        VAR(&MODLIB) TYPE(*CHAR) LEN(10) +
+                          VALUE('ZLIB')                         /* Module library. */
+
+             DCL        VAR(&SRVLIB) TYPE(*CHAR) LEN(10) +
+                          VALUE('LGPL')                         /* Service program library. */
+
+             DCL        VAR(&CFLAGS) TYPE(*CHAR) +
+                          VALUE('OPTIMIZE(40)')                 /* Compile options. */
+
+
+/*      Working storage.                                                      */
+
+             DCL        VAR(&CMDLEN) TYPE(*DEC) LEN(15 5) VALUE(300)    /* Command length. */
+             DCL        VAR(&CMD) TYPE(*CHAR) LEN(512)
+
+
+/*      Compile sources into modules.                                         */
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/ADLER32)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/COMPRESS)              SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/CRC32)                 SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/DEFLATE)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/GZIO)                  SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFBACK)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFFAST)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFLATE)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFTREES)              SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/TREES)                 SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/UNCOMPR)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/ZUTIL)                 SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+
+/*      Link modules into a service program.                                  */
+
+             CRTSRVPGM  SRVPGM(&SRVLIB/ZLIB) +
+                          MODULE(&MODLIB/ADLER32     &MODLIB/COMPRESS    +
+                                 &MODLIB/CRC32       &MODLIB/DEFLATE     +
+                                 &MODLIB/GZIO        &MODLIB/INFBACK     +
+                                 &MODLIB/INFFAST     &MODLIB/INFLATE     +
+                                 &MODLIB/INFTREES    &MODLIB/TREES       +
+                                 &MODLIB/UNCOMPR     &MODLIB/ZUTIL)      +
+                          SRCFILE(&SRCLIB/&CTLFILE) SRCMBR(BNDSRC) +
+                          TEXT('ZLIB 1.2.2') TGTRLS(V4R4M0)
+
+             ENDPGM
--- a/as400/readme.txt
+++ b/as400/readme.txt
@@ -0,0 +1,111 @@
+        ZLIB version 1.2.2 for AS400 installation instructions
+
+I) From an AS400 *SAVF file:
+
+1)      Unpacking archive to an AS400 save file
+
+On the AS400:
+
+_       Create the ZLIB AS400 library:
+
+        CRTLIB LIB(ZLIB) TYPE(PROD) TEXT('ZLIB compression API library')
+
+_       Create a work save file, for example:
+
+                CRTSAVF FILE(ZLIB/ZLIBSAVF)
+
+On a PC connected to the target AS400:
+
+_       Unpack the save file image to a PC file "ZLIBSAVF"
+_       Upload this file into the save file on the AS400, for example
+                using ftp in BINARY mode.
+
+
+2)      Populating the ZLIB AS400 source library
+
+On the AS400:
+
+_       Extract the saved objects into the ZLIB AS400 library using:
+
+RSTOBJ OBJ(*ALL) SAVLIB(ZLIB) DEV(*SAVF) SAVF(ZLIB/ZLIBSAVF) RSTLIB(ZLIB)
+
+
+3)      Customize installation:
+
+_       Edit CL member ZLIB/TOOLS(COMPILE) and change parameters if needed,
+                according to the comments.
+
+_       Compile this member with:
+
+        CRTCLPGM PGM(ZLIB/COMPILE) SRCFILE(ZLIB/TOOLS) SRCMBR(COMPILE)
+
+
+4)      Compile and generate the service program:
+
+_       This can now be done by executing:
+
+        CALL PGM(ZLIB/COMPILE)
+
+
+
+II) From the original source distribution:
+
+1)      On the AS400, create the source library:
+
+        CRTLIB LIB(ZLIB) TYPE(PROD) TEXT('ZLIB compression API library')
+
+2)      Create the source files:
+
+        CRTSRCPF FILE(ZLIB/SOURCES) RCDLEN(112) TEXT('ZLIB library modules')
+        CRTSRCPF FILE(ZLIB/H)       RCDLEN(112) TEXT('ZLIB library includes')
+        CRTSRCPF FILE(ZLIB/TOOLS)   RCDLEN(112) TEXT('ZLIB library control utilities')
+
+3)      From the machine hosting the distribution files, upload them (with
+                FTP in text mode, for example) according to the following table:
+
+    Original    AS400   AS400    AS400 AS400
+    file        file    member   type  description
+                SOURCES                Original ZLIB C subprogram sources
+    adler32.c           ADLER32  C     ZLIB - Compute the Adler-32 checksum of a dta strm
+    compress.c          COMPRESS C     ZLIB - Compress a memory buffer
+    crc32.c             CRC32    C     ZLIB - Compute the CRC-32 of a data stream
+    deflate.c           DEFLATE  C     ZLIB - Compress data using the deflation algorithm
+    gzio.c              GZIO     C     ZLIB - IO on .gz files
+    infback.c           INFBACK  C     ZLIB - Inflate using a callback interface
+    inffast.c           INFFAST  C     ZLIB - Fast proc. literals & length/distance pairs
+    inflate.c           INFLATE  C     ZLIB - Interface to inflate modules
+    inftrees.c          INFTREES C     ZLIB - Generate Huffman trees for efficient decode
+    trees.c             TREES    C     ZLIB - Output deflated data using Huffman coding
+    uncompr.c           UNCOMPR  C     ZLIB - Decompress a memory buffer
+    zutil.c             ZUTIL    C     ZLIB - Target dependent utility functions
+                H                      Original ZLIB C and ILE/RPG include files
+    crc32.h             CRC32    C     ZLIB - CRC32 tables
+    deflate.h           DEFLATE  C     ZLIB - Internal compression state
+    inffast.h           INFFAST  C     ZLIB - Header to use inffast.c
+    inffixed.h          INFFIXED C     ZLIB - Table for decoding fixed codes
+    inflate.h           INFLATE  C     ZLIB - Internal inflate state definitions
+    inftrees.h          INFTREES C     ZLIB - Header to use inftrees.c
+    trees.h             TREES    C     ZLIB - Created automatically with -DGEN_TREES_H
+    zconf.h             ZCONF    C     ZLIB - Compression library configuration
+    zlib.h              ZLIB     C     ZLIB - Compression library C user interface
+    as400/zlib.inc      ZLIB.INC RPGLE ZLIB - Compression library ILE RPG user interface
+    zutil.h             ZUTIL    C     ZLIB - Internal interface and configuration
+                TOOLS                  Building source software & AS/400 README
+    as400/bndsrc        BNDSRC         Entry point exportation list
+    as400/compile.clp   COMPILE  CLP   Compile sources & generate service program
+    as400/readme.txt    README   TXT   Installation instructions
+
+4)      Continue as in I)3).
+
+
+
+
+Notes:  For AS400 ILE RPG programmers, a /copy member defining the ZLIB
+                API prototypes for ILE RPG can be found in ZLIB/H(ZLIB.INC).
+                Please read comments in this member for more information.
+
+        Remember that most foreign textual data are ASCII coded: this
+                implementation does not handle conversion from/to ASCII, so
+                text data code conversions must be done explicitely.
+
+        Always open zipped files in binary mode.
--- a/as400/zlib.inc
+++ b/as400/zlib.inc
@@ -0,0 +1,327 @@
+      *  ZLIB.INC - Interface to the general purpose compression library
+      *
+      *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
+      *  Version 1.2.2.1
+      *
+      *
+      *  WARNING:
+      *     Procedures inflateInit(), inflateInit2(), deflateInit(),
+      *         deflateInit2() and inflateBackInit() need to be called with
+      *         two additional arguments:
+      *         the package version string and the stream control structure.
+      *         size. This is needed because RPG lacks some macro feature.
+      *         Call these procedures as:
+      *             inflateInit(...: ZLIB_VERSION: %size(z_stream))
+      *
+      /if not defined(ZLIB_H_)
+      /define ZLIB_H_
+      *
+      **************************************************************************
+      *                               Constants
+      **************************************************************************
+      *
+     D ZLIB_VERSION    C                   '1.2.2.1'                            Header's version
+     D ZLIB_VERNUM     C                   X'1221'
+      *
+     D Z_NO_FLUSH      C                   0
+     D Z_SYNC_FLUSH    C                   2
+     D Z_FULL_FLUSH    C                   3
+     D Z_FINISH        C                   4
+     D Z_BLOCK         C                   5
+      *
+     D Z_OK            C                   0
+     D Z_STREAM_END    C                   1
+     D Z_NEED_DICT     C                   2
+     D Z_ERRNO         C                   -1
+     D Z_STREAM_ERROR  C                   -2
+     D Z_DATA_ERROR    C                   -3
+     D Z_MEM_ERROR     C                   -4
+     D Z_BUF_ERROR     C                   -5
+     DZ_VERSION_ERROR  C                   -6
+      *
+     D Z_NO_COMPRESSION...
+     D                 C                   0
+     D Z_BEST_SPEED    C                   1
+     D Z_BEST_COMPRESSION...
+     D                 C                   9
+     D Z_DEFAULT_COMPRESSION...
+     D                 C                   -1
+      *
+     D Z_FILTERED      C                   1
+     D Z_HUFFMAN_ONLY  C                   2
+     D Z_RLE           C                   3
+     D Z_DEFAULT_STRATEGY...
+     D                 C                   0
+      *
+     D Z_BINARY        C                   0
+     D Z_ASCII         C                   1
+     D Z_UNKNOWN       C                   2
+      *
+     D Z_DEFLATED      C                   8
+      *
+     D Z_NULL          C                   0
+      *
+      **************************************************************************
+      *                                 Types
+      **************************************************************************
+      *
+     D z_streamp       S               *                                        Stream struct ptr
+     D gzFile          S               *                                        File pointer
+     D z_off_t         S             10i 0                                      Stream offsets
+      *
+      **************************************************************************
+      *                               Structures
+      **************************************************************************
+      *
+      *  The GZIP encode/decode stream support structure.
+      *
+     D z_stream        DS                  align based(z_streamp)
+     D  zs_next_in                     *                                        Next input byte
+     D  zs_avail_in                  10U 0                                      Byte cnt at next_in
+     D  zs_total_in                  10U 0                                      Total bytes read
+     D  zs_next_out                    *                                        Output buffer ptr
+     D  zs_avail_out                 10U 0                                      Room left @ next_out
+     D  zs_total_out                 10U 0                                      Total bytes written
+     D  zs_msg                         *                                        Last errmsg or null
+     D  zs_state                       *                                        Internal state
+     D  zs_zalloc                      *   procptr                              Int. state allocator
+     D  zs_free                        *   procptr                              Int. state dealloc.
+     D  zs_opaque                      *                                        Private alloc. data
+     D  zs_data_type                 10i 0                                      ASC/BIN best guess
+     D  zs_adler                     10u 0                                      Uncompr. adler32 val
+     D                               10U 0                                      Reserved
+     D                               10U 0                                      Ptr. alignment
+      *
+      **************************************************************************
+      *                     Utility function prototypes
+      **************************************************************************
+      *
+     D compress        PR            10I 0 extproc('compress')
+     D  dest                      32767    options(*varsize)                    Destination buffer
+     D  destLen                      10U 0                                      Destination length
+     D  source                    32767    const options(*varsize)              Source buffer
+     D  sourceLen                    10u 0 value                                Source length
+      *
+     D compress2       PR            10I 0 extproc('compress2')
+     D  dest                      32767    options(*varsize)                    Destination buffer
+     D  destLen                      10U 0                                      Destination length
+     D  source                    32767    const options(*varsize)              Source buffer
+     D  sourceLen                    10U 0 value                                Source length
+     D  level                        10I 0 value                                Compression level
+      *
+     D compressBound   PR            10U 0 extproc('compressBound')
+     D  sourceLen                    10U 0 value
+      *
+     D uncompress      PR            10I 0 extproc('uncompress')
+     D  dest                      32767    options(*varsize)                    Destination buffer
+     D  destLen                      10U 0                                      Destination length
+     D  source                    32767    const options(*varsize)              Source buffer
+     D  sourceLen                    10U 0 value                                Source length
+      *
+     D gzopen          PR                  extproc('gzopen')
+     D                                     like(gzFile)
+     D  path                           *   value options(*string)               File pathname
+     D  mode                           *   value options(*string)               Open mode
+      *
+     D gzdopen         PR                  extproc('gzdopen')
+     D                                     like(gzFile)
+     D  fd                           10i 0 value                                File descriptor
+     D  mode                           *   value options(*string)               Open mode
+      *
+     D gzsetparams     PR            10I 0 extproc('gzsetparams')
+     D  file                               value like(gzFile)                   File pointer
+     D  level                        10I 0 value
+     D  strategy                     10i 0 value
+      *
+     D gzread          PR            10I 0 extproc('gzread')
+     D  file                               value like(gzFile)                   File pointer
+     D  buf                       32767    options(*varsize)                    Buffer
+     D  len                          10u 0 value                                Buffer length
+      *
+     D gzwrite         PR            10I 0 extproc('gzwrite')
+     D  file                               value like(gzFile)                   File pointer
+     D  buf                       32767    const options(*varsize)              Buffer
+     D  len                          10u 0 value                                Buffer length
+      *
+     D gzputs          PR            10I 0 extproc('gzputs')
+     D  file                               value like(gzFile)                   File pointer
+     D  s                              *   value options(*string)               String to output
+      *
+     D gzgets          PR              *   extproc('gzgets')
+     D  file                               value like(gzFile)                   File pointer
+     D  buf                       32767    options(*varsize)                    Read buffer
+     D  len                          10i 0 value                                Buffer length
+      *
+     D gzflush         PR            10i 0 extproc('gzflush')
+     D  file                               value like(gzFile)                   File pointer
+     D  flush                        10I 0 value                                Type of flush
+      *
+     D gzseek          PR                  extproc('gzseek')
+     D                                     like(z_off_t)
+     D  file                               value like(gzFile)                   File pointer
+     D  offset                             value like(z_off_t)                  Offset
+     D  whence                       10i 0 value                                Origin
+      *
+     D gzrewind        PR            10i 0 extproc('gzrewind')
+     D  file                               value like(gzFile)                   File pointer
+      *
+     D gztell          PR                  extproc('gztell')
+     D                                     like(z_off_t)
+     D  file                               value like(gzFile)                   File pointer
+      *
+     D gzeof           PR            10i 0 extproc('gzeof')
+     D  file                               value like(gzFile)                   File pointer
+      *
+     D gzclose         PR            10i 0 extproc('gzclose')
+     D  file                               value like(gzFile)                   File pointer
+      *
+     D gzerror         PR              *   extproc('gzerror')                   Error string
+     D  file                               value like(gzFile)                   File pointer
+     D  errnum                       10I 0                                      Error code
+      *
+     D gzclearerr      PR                  extproc('gzclearerr')
+     D  file                               value like(gzFile)                   File pointer
+      *
+      **************************************************************************
+      *                        Basic function prototypes
+      **************************************************************************
+      *
+     D zlibVersion     PR              *   extproc('zlibVersion')               Version string
+      *
+     D deflateInit     PR            10I 0 extproc('deflateInit_')              Init. compression
+     D  strm                               like(z_stream)                       Compression stream
+     D  level                        10I 0 value                                Compression level
+     D  version                        *   value options(*string)               Version string
+     D  stream_size                  10i 0 value                                Stream struct. size
+      *
+     D deflate         PR            10I 0 extproc('deflate')                   Compress data
+     D  strm                               like(z_stream)                       Compression stream
+     D  flush                        10I 0 value                                Flush type required
+      *
+     D deflateEnd      PR            10I 0 extproc('deflateEnd')                Termin. compression
+     D  strm                               like(z_stream)                       Compression stream
+      *
+     D inflateInit     PR            10I 0 extproc('inflateInit_')              Init. expansion
+     D  strm                               like(z_stream)                       Expansion stream
+     D  version                        *   value options(*string)               Version string
+     D  stream_size                  10i 0 value                                Stream struct. size
+      *
+     D inflate         PR            10I 0 extproc('inflate')                   Expand data
+     D  strm                               like(z_stream)                       Expansion stream
+     D  flush                        10I 0 value                                Flush type required
+      *
+     D inflateEnd      PR            10I 0 extproc('inflateEnd')                Termin. expansion
+     D  strm                               like(z_stream)                       Expansion stream
+      *
+      **************************************************************************
+      *                        Advanced function prototypes
+      **************************************************************************
+      *
+     D deflateInit2    PR            10I 0 extproc('deflateInit2_')             Init. compression
+     D  strm                               like(z_stream)                       Compression stream
+     D  level                        10I 0 value                                Compression level
+     D  method                       10I 0 value                                Compression method
+     D  windowBits                   10I 0 value                                log2(window size)
+     D  memLevel                     10I 0 value                                Mem/cmpress tradeoff
+     D  strategy                     10I 0 value                                Compression stategy
+     D  version                        *   value options(*string)               Version string
+     D  stream_size                  10i 0 value                                Stream struct. size
+      *
+     D deflateSetDictionary...
+     D                 PR            10I 0 extproc('deflateSetDictionary')      Init. dictionary
+     D  strm                               like(z_stream)                       Compression stream
+     D  dictionary                32767    const options(*varsize)              Dictionary bytes
+     D  dictLength                   10U 0 value                                Dictionary length
+      *
+     D deflateCopy     PR            10I 0 extproc('deflateCopy')               Compress strm 2 strm
+     D  dest                               like(z_stream)                       Destination stream
+     D  source                             like(z_stream)                       Source stream
+      *
+     D deflateReset    PR            10I 0 extproc('deflateReset')              End and init. stream
+     D  strm                               like(z_stream)                       Compression stream
+      *
+     D deflateParams   PR            10I 0 extproc('deflateParams')             Change level & strat
+     D  strm                               like(z_stream)                       Compression stream
+     D  level                        10I 0 value                                Compression level
+     D  strategy                     10I 0 value                                Compression stategy
+      *
+     D deflateBound    PR            10U 0 extproc('deflateBound')              Change level & strat
+     D  strm                               like(z_stream)                       Compression stream
+     D  sourcelen                    10U 0 value                                Compression level
+      *
+     D deflatePrime    PR            10I 0 extproc('deflatePrime')              Change level & strat
+     D  strm                               like(z_stream)                       Compression stream
+     D  bits                         10I 0 value                                Number of bits to insert
+     D  value                        10I 0 value                                Bits to insert
+      *
+     D inflateInit2    PR            10I 0 extproc('inflateInit2_')             Init. expansion
+     D  strm                               like(z_stream)                       Expansion stream
+     D  windowBits                   10I 0 value                                log2(window size)
+     D  version                        *   value options(*string)               Version string
+     D  stream_size                  10i 0 value                                Stream struct. size
+      *
+     D inflateSetDictionary...
+     D                 PR            10I 0 extproc('inflateSetDictionary')      Init. dictionary
+     D  strm                               like(z_stream)                       Expansion stream
+     D  dictionary                32767    const options(*varsize)              Dictionary bytes
+     D  dictLength                   10U 0 value                                Dictionary length
+      *
+     D inflateSync     PR            10I 0 extproc('inflateSync')               Sync. expansion
+     D  strm                               like(z_stream)                       Expansion stream
+      *
+     D inflateCopy     PR            10I 0 extproc('inflateCopy')
+     D  dest                               like(z_stream)                       Destination stream
+     D  source                             like(z_stream)                       Source stream
+      *
+     D inflateReset    PR            10I 0 extproc('inflateReset')              End and init. stream
+     D  strm                               like(z_stream)                       Expansion stream
+      *
+     D inflateBackInit...
+     D                 PR            10I 0 extproc('inflateBackInit_')
+     D  strm                               like(z_stream)                       Expansion stream
+     D  windowBits                   10I 0 value                                Log2(buffer size)
+     D  window                    32767    options(*varsize)                    Buffer
+     D  version                        *   value options(*string)               Version string
+     D  stream_size                  10i 0 value                                Stream struct. size
+      *
+     D inflateBack     PR            10I 0 extproc('inflateBack')
+     D  strm                               like(z_stream)                       Expansion stream
+     D  in                             *   value procptr                        Input function
+     D  in_desc                        *   value                                Input descriptor
+     D  out                            *   value procptr                        Output function
+     D  out_desc                       *   value                                Output descriptor
+      *
+     D inflateBackEnd  PR            10I 0 extproc('inflateBackEnd')
+     D  strm                               like(z_stream)                       Expansion stream
+      *
+     D zlibCompileFlags...
+     D                 PR            10U 0 extproc('zlibCompileFlags')
+      *
+      **************************************************************************
+      *                        Checksum function prototypes
+      **************************************************************************
+      *
+     D adler32         PR            10U 0 extproc('adler32')                   New checksum
+     D  adler                        10U 0 value                                Old checksum
+     D  buf                       32767    const options(*varsize)              Bytes to accumulate
+     D  len                          10U 0 value                                Buffer length
+      *
+     D crc32           PR            10U 0 extproc('crc32')                     New checksum
+     D  crc                          10U 0 value                                Old checksum
+     D  buf                       32767    const options(*varsize)              Bytes to accumulate
+     D  len                          10U 0 value                                Buffer length
+      *
+      **************************************************************************
+      *                     Miscellaneous function prototypes
+      **************************************************************************
+      *
+     D zError          PR              *   extproc('zError')                    Error string
+     D  err                          10I 0 value                                Error code
+      *
+     D inflateSyncPoint...
+     D                 PR            10I 0 extproc('inflateSyncPoint')
+     D  strm                               like(z_stream)                       Expansion stream
+      *
+     D get_crc_table   PR              *   extproc('get_crc_table')             Ptr to ulongs
+      *
+      /endif
--- a/compress.c
+++ b/compress.c
@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

--- a/105
+++ b/105
@@ -20,8 +20,9 @@

 LIBS=libz.a
 LDFLAGS="-L. ${LIBS}"
-SHAREDLIB=libz.so
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
+VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
+VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
 AR=${AR-"ar rc"}
 RANLIB=${RANLIB-"ranlib"}
 prefix=${prefix-/usr/local}
@@ -52,13 +53,10 @@ case "$1" in
    -l* | --l*) libdir="$2"; shift; shift;;
    -i* | --i*) includedir="$2"; shift; shift;;
    -s* | --s*) shared=1; shift;;
+    *) echo "unknown option: $1"; echo "$0 --help for help"; exit 1;;
    esac
 done

-if [ $shared -eq 1 ]; then
-  LDFLAGS="-L. ${SHAREDLIB}"
-fi
-
 test=ztest$$
 cat > $test.c <<EOF
 extern int getchar();
@@ -78,13 +76,20 @@ if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
  SFLAGS=${CFLAGS-"-fPIC -O3"}
  CFLAGS="$cflags"
  case `(uname -s || echo unknown) 2>/dev/null` in
-  Linux | linux) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
+  Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
+  CYGWIN* | Cygwin* | cygwin* | OS/2* )
+             EXE='.exe';;
  QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
         # (alain.bonnefoy@icbt.com)
                 LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"};;
  HP-UX*)        LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
                 shared_ext='.sl'
                 SHAREDLIB='libz.sl';;
+  Darwin*)   shared_ext='.dylib'
+             SHAREDLIB=libz$shared_ext
+             SHAREDLIBV=libz.$VER$shared_ext
+             SHAREDLIBM=libz.$VER1$shared_ext
+             LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBV -compatibility_version $VER2 -current_version $VER"};;
  *)             LDSHARED=${LDSHARED-"$cc -shared"};;
  esac
 else
@@ -102,7 +107,7 @@ else
             LDSHARED=${LDSHARED-"cc -shared"};;
  OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
             CFLAGS=${CFLAGS-"-O -std1"}
-             LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,$SHAREDLIB -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;
+             LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;
  OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
             CFLAGS=${CFLAGS-"-O -std1"}
             LDSHARED=${LDSHARED-"cc -shared"};;
@@ -143,14 +148,18 @@ else
  esac
 fi

+SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
+SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
+SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
+
 if test $shared -eq 1; then
  echo Checking for shared library support...
  # we must test in two steps (cc then ld), required at least on SunOS 4.x
  if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
     test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
    CFLAGS="$SFLAGS"
-    LIBS="$SHAREDLIB.$VER"
-    echo Building shared library $SHAREDLIB.$VER with $CC.
+    LIBS="$SHAREDLIBV"
+    echo Building shared library $SHAREDLIBV with $CC.
  elif test -z "$old_cc" -a -z "$old_cflags"; then
    echo No shared library support.
    shared=0;
@@ -162,6 +171,8 @@ fi
 if test $shared -eq 0; then
  LDSHARED="$CC"
  echo Building static library $LIBS version $VER with $CC.
+else
+  LDFLAGS="-L. ${SHAREDLIBV}"
 fi

 cat > $test.c <<EOF
@@ -178,11 +189,8 @@ fi

 cat > $test.c <<EOF
 #include <stdio.h>
-#include <stdlib.h>
-
-#if (defined(__MSDOS__) || defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)) && !defined(STDC)
-#  define STDC
-#endif
+#include <stdarg.h>
+#include "zconf.h"

 int main()
 {
@@ -195,7 +203,7 @@ int main()
 EOF

 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
-  echo "Checking whether to use vsnprintf() or snprintf()... using vsnprintf()"
+  echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()"

  cat > $test.c <<EOF
 #include <stdio.h>
@@ -218,7 +226,7 @@ int main()
 }
 EOF

-  if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
    echo "Checking for vsnprintf() in stdio.h... Yes."

    cat >$test.c <<EOF
@@ -227,14 +235,14 @@ EOF

 int mytest(char *fmt, ...)
 {
-  int i;
+  int n;
  char buf[20];
  va_list ap;

  va_start(ap, fmt);
-  i = vsnprintf(buf, sizeof(buf), fmt, ap);
+  n = vsnprintf(buf, sizeof(buf), fmt, ap);
  va_end(ap);
-  return 0;
+  return n;
 }

 int main()
@@ -265,14 +273,14 @@ EOF

 int mytest(char *fmt, ...)
 {
-  int i;
+  int n;
  char buf[20];
  va_list ap;

  va_start(ap, fmt);
-  i = vsprintf(buf, fmt, ap);
+  n = vsprintf(buf, fmt, ap);
  va_end(ap);
-  return 0;
+  return n;
 }

 int main()
@@ -292,11 +300,10 @@ EOF
    fi
  fi
 else
-  echo "Checking whether to use vsnprintf() or snprintf()... using snprintf()"
+  echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()"

  cat >$test.c <<EOF
 #include <stdio.h>
-#include <stdarg.h>

 int mytest()
 {
@@ -312,20 +319,17 @@ int main()
 }
 EOF

-  if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
    echo "Checking for snprintf() in stdio.h... Yes."

    cat >$test.c <<EOF
 #include <stdio.h>
-#include <stdarg.h>

-int mytest(char *fmt, ...)
+int mytest()
 {
-  int i;
  char buf[20];

-  i = snprintf(buf, sizeof(buf), "%s", "foo");
-  return 0;
+  return snprintf(buf, sizeof(buf), "%s", "foo");
 }

 int main()
@@ -352,15 +356,12 @@ EOF

    cat >$test.c <<EOF
 #include <stdio.h>
-#include <stdarg.h>

-int mytest(char *fmt, ...)
+int mytest()
 {
-  int i;
  char buf[20];

-  i = sprintf(buf, "%s", "foo");
-  return 0;
+  return sprintf(buf, "%s", "foo");
 }

 int main()
@@ -418,23 +419,25 @@ case $CFLAGS in
    fi;;
 esac

-rm -f $test.[co] $test$shared_ext
+rm -f $test.[co] $test $test$shared_ext

 # udpate Makefile
 sed < Makefile.in "
-/^CC *=/s%=.*%=$CC%
-/^CFLAGS *=/s%=.*%=$CFLAGS%
-/^CPP *=/s%=.*%=$CPP%
-/^LDSHARED *=/s%=.*%=$LDSHARED%
-/^LIBS *=/s%=.*%=$LIBS%
-/^SHAREDLIB *=/s%=.*%=$SHAREDLIB%
-/^AR *=/s%=.*%=$AR%
-/^RANLIB *=/s%=.*%=$RANLIB%
-/^VER *=/s%=.*%=$VER%
-/^prefix *=/s%=.*%=$prefix%
-/^exec_prefix *=/s%=.*%=$exec_prefix%
-/^libdir *=/s%=.*%=$libdir%
-/^includedir *=/s%=.*%=$includedir%
-/^mandir *=/s%=.*%=$mandir%
-/^LDFLAGS *=/s%=.*%=$LDFLAGS%
+/^CC *=/s#=.*#=$CC#
+/^CFLAGS *=/s#=.*#=$CFLAGS#
+/^CPP *=/s#=.*#=$CPP#
+/^LDSHARED *=/s#=.*#=$LDSHARED#
+/^LIBS *=/s#=.*#=$LIBS#
+/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
+/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
+/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
+/^AR *=/s#=.*#=$AR#
+/^RANLIB *=/s#=.*#=$RANLIB#
+/^EXE *=/s#=.*#=$EXE#
+/^prefix *=/s#=.*#=$prefix#
+/^exec_prefix *=/s#=.*#=$exec_prefix#
+/^libdir *=/s#=.*#=$libdir#
+/^includedir *=/s#=.*#=$includedir#
+/^mandir *=/s#=.*#=$mandir#
+/^LDFLAGS *=/s#=.*#=$LDFLAGS#
 " > Makefile
--- a/contrib/README.contrib
+++ b/contrib/README.contrib
@@ -8,7 +8,8 @@ ada/        by Dmitriy Anisimkov <anisimkov@yahoo.com>
        Support for Ada
        See http://zlib-ada.sourceforge.net/

-asm586/ and asm686/ by Brian Raiter <breadbox@muppetlabs.com>
+asm586/
+asm686/     by Brian Raiter <breadbox@muppetlabs.com>
        asm code for Pentium and PPro/PII, using the AT&T (GNU as) syntax
        See http://www.muppetlabs.com/~breadbox/software/assembly.html

@@ -18,9 +19,14 @@ blast/      by Mark Adler <madler@alumni.caltech.edu>
 delphi/     by Cosmin Truta <cosmint@cs.ubbcluj.ro>
        Support for Delphi and C++ Builder

+dotzlib/    by Henrik Ravn <henrik@ravn.com>
+        Support for Microsoft .Net and Visual C++ .Net
+
+gzappend/   by Mark Adler <madler@alumni.caltech.edu>
+        append to a gzip file -- illustrates the use of Z_BLOCK
+
 infback9/   by Mark Adler <madler@alumni.caltech.edu>
        Unsupported diffs to infback to decode the deflate64 format
-        (Worse than that, it's not even tested)

 inflate86/  by Chris Anderson <christop@charm.net>
        Tuned x86 gcc asm code to replace inflate_fast()
@@ -57,11 +63,8 @@ puff/       by Mark Adler <madler@alumni.caltech.edu>
 testzlib/   by Gilles Vollant <info@winimage.com>
        Example of the use of zlib

-untgz/      by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+untgz/      by Pedro A. Aranda Gutierrez <paag@tid.es>
        A very simple tar.gz file extractor using zlib

-visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
-	How to use compress(), uncompress() and the gz* functions from VB
-
 vstudio/    by Gilles Vollant <info@winimage.com>
-	Building zlib with Visual Studio .NET
+        Building a minizip-enhanced zlib with Microsoft Visual Studio
--- a/contrib/ada/buffer_demo.adb
+++ b/contrib/ada/buffer_demo.adb
@@ -0,0 +1,106 @@
+----------------------------------------------------------------
+--  ZLib for Ada thick binding.                               --
+--                                                            --
+--  Copyright (C) 2002-2004 Dmitriy Anisimkov                 --
+--                                                            --
+--  Open source license information is in the zlib.ads file.  --
+----------------------------------------------------------------
+--
+--  $Id: buffer_demo.adb,v 1.3 2004/09/06 06:55:35 vagul Exp $
+
+--  This demo program provided by Dr Steve Sangwine <sjs@essex.ac.uk>
+--
+--  Demonstration of a problem with Zlib-Ada (already fixed) when a buffer
+--  of exactly the correct size is used for decompressed data, and the last
+--  few bytes passed in to Zlib are checksum bytes.
+
+--  This program compresses a string of text, and then decompresses the
+--  compressed text into a buffer of the same size as the original text.
+
+with Ada.Streams; use Ada.Streams;
+with Ada.Text_IO;
+
+with ZLib; use ZLib;
+
+procedure Buffer_Demo is
+   EOL  : Character renames ASCII.LF;
+   Text : constant String
+     := "Four score and seven years ago our fathers brought forth," & EOL &
+        "upon this continent, a new nation, conceived in liberty," & EOL &
+        "and dedicated to the proposition that `all men are created equal'.";
+
+   Source : Stream_Element_Array (1 .. Text'Length);
+   for Source'Address use Text'Address;
+
+begin
+   Ada.Text_IO.Put (Text);
+   Ada.Text_IO.New_Line;
+   Ada.Text_IO.Put_Line
+     ("Uncompressed size : " & Positive'Image (Text'Length) & " bytes");
+
+   declare
+      Compressed_Data : Stream_Element_Array (1 .. Text'Length);
+      L               : Stream_Element_Offset;
+   begin
+      Compress : declare
+         Compressor : Filter_Type;
+         I : Stream_Element_Offset;
+      begin
+         Deflate_Init (Compressor);
+
+         --  Compress the whole of T at once.
+
+         Translate (Compressor, Source, I, Compressed_Data, L, Finish);
+         pragma Assert (I = Source'Last);
+
+         Close (Compressor);
+
+         Ada.Text_IO.Put_Line
+           ("Compressed size :   "
+            & Stream_Element_Offset'Image (L) & " bytes");
+      end Compress;
+
+      --  Now we decompress the data, passing short blocks of data to Zlib
+      --  (because this demonstrates the problem - the last block passed will
+      --  contain checksum information and there will be no output, only a
+      --  check inside Zlib that the checksum is correct).
+
+      Decompress : declare
+         Decompressor : Filter_Type;
+
+         Uncompressed_Data : Stream_Element_Array (1 .. Text'Length);
+
+         Block_Size : constant := 4;
+         --  This makes sure that the last block contains
+         --  only Adler checksum data.
+
+         P : Stream_Element_Offset := Compressed_Data'First - 1;
+         O : Stream_Element_Offset;
+      begin
+         Inflate_Init (Decompressor);
+
+         loop
+            Translate
+              (Decompressor,
+               Compressed_Data
+                 (P + 1 .. Stream_Element_Offset'Min (P + Block_Size, L)),
+               P,
+               Uncompressed_Data
+                 (Total_Out (Decompressor) + 1 .. Uncompressed_Data'Last),
+               O,
+               No_Flush);
+
+               Ada.Text_IO.Put_Line
+                 ("Total in : " & Count'Image (Total_In (Decompressor)) &
+                  ", out : " & Count'Image (Total_Out (Decompressor)));
+
+               exit when P = L;
+         end loop;
+
+         Ada.Text_IO.New_Line;
+         Ada.Text_IO.Put_Line
+           ("Decompressed text matches original text : "
+             & Boolean'Image (Uncompressed_Data = Source));
+      end Decompress;
+   end;
+end Buffer_Demo;
--- a/contrib/ada/mtest.adb
+++ b/contrib/ada/mtest.adb
@@ -5,10 +5,10 @@
 --                                                            --
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------
--  Continuous test for ZLib multithreading. If the test is fail
--  Wou should provide thread safe allocation routines for the Z_Stream.
+--  Continuous test for ZLib multithreading. If the test would fail
+--  we should provide thread safe allocation routines for the Z_Stream.
 --
--  $Id: mtest.adb,v 1.2 2003/08/12 12:11:05 vagul Exp $
+--  $Id: mtest.adb,v 1.4 2004/07/23 07:49:54 vagul Exp $

 with ZLib;
 with Ada.Streams;
@@ -148,6 +148,9 @@ procedure MTest is

   pragma Unreferenced (Test);

+   Dummy : Character;
+
 begin
-   null;
+   Ada.Text_IO.Get_Immediate (Dummy);
+   Stop := True;
 end MTest;
--- a/contrib/ada/read.adb
+++ b/contrib/ada/read.adb
@@ -6,7 +6,7 @@
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------

--  $Id: read.adb,v 1.7 2003/08/12 12:12:35 vagul Exp $
+--  $Id: read.adb,v 1.8 2004/05/31 10:53:40 vagul Exp $

 --  Test/demo program for the generic read interface.

@@ -68,7 +68,11 @@ procedure Read is
   --  ZLib.Read
   --  reading data from the File_In.

-   procedure Read is new ZLib.Read (Read, Read_Buffer, Read_First, Read_Last);
+   procedure Read is new ZLib.Read
+                           (Read,
+                            Read_Buffer,
+                            Rest_First => Read_First,
+                            Rest_Last  => Read_Last);

   ----------
   -- Read --
@@ -103,6 +107,7 @@ procedure Read is
      Pack_Size := 0;
      Offset := 1;
      Read_First := Read_Buffer'Last + 1;
+      Read_Last  := Read_Buffer'Last;
   end Reset;

 begin
--- a/contrib/ada/readme.txt
+++ b/contrib/ada/readme.txt
@@ -1,20 +1,31 @@
-
                        ZLib for Ada thick binding (ZLib.Ada)
-			Release 1.2
+                        Release 1.3

 ZLib.Ada is a thick binding interface to the popular ZLib data
 compression library, available at http://www.gzip.org/zlib/.
 It provides Ada-style access to the ZLib C library.


-	Here are the main changes since ZLib.Ada 1.1:
+        Here are the main changes since ZLib.Ada 1.2:

- The default header type has a name "Default" now. Auto is used only for
-  automatic GZip/ZLib header detection.
+- Attension: ZLib.Read generic routine have a initialization requirement
+  for Read_Last parameter now. It is a bit incompartible with previous version,
+  but extends functionality, we could use new parameters Allow_Read_Some and
+  Flush now.

- Added test for multitasking mtest.adb.
+- Added Is_Open routines to ZLib and ZLib.Streams packages.

- Added GNAT project file zlib.gpr.
+- Add pragma Assert to check Stream_Element is 8 bit.
+
+- Fix extraction to buffer with exact known decompressed size. Error reported by
+  Steve Sangwine.
+
+- Fix definition of ULong (changed to unsigned_long), fix regression on 64 bits
+  computers. Patch provided by Pascal Obry.
+
+- Add Status_Error exception definition.
+
+- Add pragma Assertion that Ada.Streams.Stream_Element size is 8 bit.


        How to build ZLib.Ada under GNAT
@@ -50,3 +61,5 @@ The routines from the package specifications are commented.

 Homepage: http://zlib-ada.sourceforge.net/
 Author: Dmitriy Anisimkov <anisimkov@yahoo.com>
+
+Contributors: Pascal Obry <pascal@obry.org>, Steve Sangwine <sjs@essex.ac.uk>
--- a/contrib/ada/zlib-streams.adb
+++ b/contrib/ada/zlib-streams.adb
@@ -6,7 +6,7 @@
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------

--  $Id: zlib-streams.adb,v 1.9 2003/08/12 13:15:31 vagul Exp $
+--  $Id: zlib-streams.adb,v 1.10 2004/05/31 10:53:40 vagul Exp $

 with Ada.Unchecked_Deallocation;

@@ -90,6 +90,7 @@ package body ZLib.Streams is

         Stream.Buffer     := new Buffer_Subtype;
         Stream.Rest_First := Stream.Buffer'Last + 1;
+         Stream.Rest_Last  := Stream.Buffer'Last;
      end if;
   end Create;

@@ -113,6 +114,15 @@ package body ZLib.Streams is
      end loop;
   end Flush;

+   -------------
+   -- Is_Open --
+   -------------
+
+   function Is_Open (Stream : Stream_Type) return Boolean is
+   begin
+      return Is_Open (Stream.Reader) or else Is_Open (Stream.Writer);
+   end Is_Open;
+
   ----------
   -- Read --
   ----------
--- a/contrib/ada/zlib-streams.ads
+++ b/contrib/ada/zlib-streams.ads
@@ -6,7 +6,7 @@
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------

--  $Id: zlib-streams.ads,v 1.11 2003/08/12 13:15:31 vagul Exp $
+--  $Id: zlib-streams.ads,v 1.12 2004/05/31 10:53:40 vagul Exp $

 package ZLib.Streams is

@@ -77,6 +77,8 @@ package ZLib.Streams is
   --  !!! When the Need_Header is False ZLib-Ada is using undocumented
   --  ZLib 1.1.4 functionality to do not create/wait for ZLib headers.

+   function Is_Open (Stream : Stream_Type) return Boolean;
+
   procedure Close (Stream : in out Stream_Type);

 private
--- a/contrib/ada/zlib-thin.adb
+++ b/contrib/ada/zlib-thin.adb
@@ -6,12 +6,11 @@
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------

--  $Id: zlib-thin.adb,v 1.6 2003/01/21 15:26:37 vagul Exp $
+--  $Id: zlib-thin.adb,v 1.8 2003/12/14 18:27:31 vagul Exp $

 package body ZLib.Thin is

-   ZLIB_VERSION : constant Chars_Ptr :=
-      Interfaces.C.Strings.New_String ("1.1.4");
+   ZLIB_VERSION  : constant Chars_Ptr := zlibVersion;

   Z_Stream_Size : constant Int := Z_Stream'Size / System.Storage_Unit;

@@ -37,14 +36,6 @@ package body ZLib.Thin is
   -- Deflate_Init --
   ------------------

-   function Deflate_Init
-     (strm  : in Z_Streamp;
-      level : in Int := Z_DEFAULT_COMPRESSION)
-      return  Int is
-   begin
-      return deflateInit (strm, level, ZLIB_VERSION, Z_Stream_Size);
-   end Deflate_Init;
-
   function Deflate_Init
     (strm       : Z_Streamp;
      level      : Int;
@@ -69,16 +60,15 @@ package body ZLib.Thin is
   -- Inflate_Init --
   ------------------

-   function Inflate_Init (strm : Z_Streamp) return Int is
-   begin
-      return inflateInit (strm, ZLIB_VERSION, Z_Stream_Size);
-   end Inflate_Init;
-
   function Inflate_Init (strm : Z_Streamp; windowBits : Int) return Int is
   begin
      return inflateInit2 (strm, windowBits, ZLIB_VERSION, Z_Stream_Size);
   end Inflate_Init;

+   ------------------------
+   -- Last_Error_Message --
+   ------------------------
+
   function Last_Error_Message (Strm : in Z_Stream) return String is
      use Interfaces.C.Strings;
   begin
@@ -89,45 +79,19 @@ package body ZLib.Thin is
      end if;
   end Last_Error_Message;

-   -------------
-   -- Need_In --
-   -------------
-
-   function Need_In (strm : Z_Stream) return Boolean is
-   begin
-      return strm.Avail_In = 0;
-   end Need_In;
-
-   --------------
-   -- Need_Out --
-   --------------
-
-   function Need_Out (strm : Z_Stream) return Boolean is
-   begin
-      return strm.Avail_Out = 0;
-   end Need_Out;
-
   ------------
   -- Set_In --
   ------------

   procedure Set_In
     (Strm   : in out Z_Stream;
-      Buffer : in Byte_Access;
+      Buffer : in     Voidp;
      Size   : in     UInt) is
   begin
      Strm.Next_In  := Buffer;
      Strm.Avail_In := Size;
   end Set_In;

-   procedure Set_In
-     (Strm   : in out Z_Stream;
-      Buffer : in Voidp;
-      Size   : in UInt) is
-   begin
-      Set_In (Strm, Bytes.To_Pointer (Buffer), Size);
-   end Set_In;
-
   ------------------
   -- Set_Mem_Func --
   ------------------
@@ -149,21 +113,13 @@ package body ZLib.Thin is

   procedure Set_Out
     (Strm   : in out Z_Stream;
-      Buffer : in Byte_Access;
+      Buffer : in     Voidp;
      Size   : in     UInt) is
   begin
      Strm.Next_Out  := Buffer;
      Strm.Avail_Out := Size;
   end Set_Out;

-   procedure Set_Out
-     (Strm   : in out Z_Stream;
-      Buffer : in Voidp;
-      Size   : in UInt) is
-   begin
-      Set_Out (Strm, Bytes.To_Pointer (Buffer), Size);
-   end Set_Out;
-
   --------------
   -- Total_In --
   --------------
--- a/contrib/ada/zlib-thin.ads
+++ b/contrib/ada/zlib-thin.ads
@@ -6,10 +6,11 @@
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------

--  $Id: zlib-thin.ads,v 1.8 2003/08/12 13:16:51 vagul Exp $
+--  $Id: zlib-thin.ads,v 1.11 2004/07/23 06:33:11 vagul Exp $

 with Interfaces.C.Strings;
-with System.Address_To_Access_Conversions;
+
+with System;

 private package ZLib.Thin is

@@ -36,18 +37,18 @@ private package ZLib.Thin is
                                                --  zconf.h:216
   type Int is new Interfaces.C.int;

-   type ULong is new Interfaces.C.unsigned;     --  32 bits or more
+   type ULong is new Interfaces.C.unsigned_long;     --  32 bits or more
                                                     --  zconf.h:217
   subtype Chars_Ptr is Interfaces.C.Strings.chars_ptr;

   type ULong_Access is access ULong;
   type Int_Access is access Int;
+
   subtype Voidp is System.Address;            --  zconf.h:232

-   package Bytes is new System.Address_To_Access_Conversions (Byte);
-
-   subtype Byte_Access is Bytes.Object_Pointer;
+   subtype Byte_Access is Voidp;

+   Nul : constant Voidp := System.Null_Address;
   --  end from zconf

   Z_NO_FLUSH : constant := 8#0000#;   --  zlib.h:125
@@ -251,12 +252,6 @@ private package ZLib.Thin is
      stream_size : Int)
      return        Int;

-   function Deflate_Init
-     (strm  : in Z_Streamp;
-      level : in Int := Z_DEFAULT_COMPRESSION)
-      return  Int;
-   pragma Inline (Deflate_Init);
-
   function deflateInit2
     (strm        : Z_Streamp;
      level       : Int;
@@ -284,9 +279,6 @@ private package ZLib.Thin is
      stream_size : Int)
      return        Int;

-   function Inflate_Init (strm : Z_Streamp) return Int;
-   pragma Inline (Inflate_Init);
-
   function inflateInit2
     (strm        : in Z_Streamp;
      windowBits  : in Int;
@@ -318,32 +310,12 @@ private package ZLib.Thin is
   --  has dropped to zero. The application must initialize zalloc, zfree and
   --  opaque before calling the init function.

-   function Need_In (strm : in Z_Stream) return Boolean;
-   --  return true when we do not need to setup Next_In and Avail_In fields.
-   pragma Inline (Need_In);
-
-   function Need_Out (strm : in Z_Stream) return Boolean;
-   --  return true when we do not need to setup Next_Out and Avail_Out field.
-   pragma Inline (Need_Out);
-
-   procedure Set_In
-     (Strm   : in out Z_Stream;
-      Buffer : in Byte_Access;
-      Size   : in UInt);
-   pragma Inline (Set_In);
-
   procedure Set_In
     (Strm   : in out Z_Stream;
      Buffer : in Voidp;
      Size   : in UInt);
   pragma Inline (Set_In);

-   procedure Set_Out
-     (Strm   : in out Z_Stream;
-      Buffer : in Byte_Access;
-      Size   : in UInt);
-   pragma Inline (Set_Out);
-
   procedure Set_Out
     (Strm   : in out Z_Stream;
      Buffer : in Voidp;
@@ -391,10 +363,10 @@ private package ZLib.Thin is
 private

   type Z_Stream is record            -- zlib.h:68
-      Next_In   : Byte_Access;        -- next input byte
+      Next_In   : Voidp      := Nul;  -- next input byte
      Avail_In  : UInt       := 0;    -- number of bytes available at next_in
      Total_In  : ULong      := 0;    -- total nb of input bytes read so far
-      Next_Out  : Byte_Access;        -- next output byte should be put there
+      Next_Out  : Voidp      := Nul;  -- next output byte should be put there
      Avail_Out : UInt       := 0;    -- remaining free space at next_out
      Total_Out : ULong      := 0;    -- total nb of bytes output so far
      msg       : Chars_Ptr;          -- last error message, NULL if no error
--- a/contrib/ada/zlib.adb
+++ b/contrib/ada/zlib.adb
@@ -1,12 +1,12 @@
 ----------------------------------------------------------------
 --  ZLib for Ada thick binding.                               --
 --                                                            --
--  Copyright (C) 2002-2003 Dmitriy Anisimkov                 --
+--  Copyright (C) 2002-2004 Dmitriy Anisimkov                 --
 --                                                            --
 --  Open source license information is in the zlib.ads file.  --
 ----------------------------------------------------------------

--  $Id: zlib.adb,v 1.19 2003/07/13 16:02:19 vagul Exp $
+--  $Id: zlib.adb,v 1.31 2004/09/06 06:53:19 vagul Exp $

 with Ada.Exceptions;
 with Ada.Unchecked_Conversion;
@@ -34,7 +34,7 @@ package body ZLib is
       VERSION_ERROR);

   type Flate_Step_Function is access
-     function (Strm : Thin.Z_Streamp; flush : Thin.Int) return Thin.Int;
+     function (Strm : in Thin.Z_Streamp; Flush : in Thin.Int) return Thin.Int;
   pragma Convention (C, Flate_Step_Function);

   type Flate_End_Function is access
@@ -82,13 +82,13 @@ package body ZLib is
   Flush_Finish : constant array (Boolean) of Flush_Mode
     := (True => Finish, False => No_Flush);

-   procedure Raise_Error (Stream : Z_Stream);
+   procedure Raise_Error (Stream : in Z_Stream);
   pragma Inline (Raise_Error);

-   procedure Raise_Error (Message : String);
+   procedure Raise_Error (Message : in String);
   pragma Inline (Raise_Error);

-   procedure Check_Error (Stream : Z_Stream; Code : Thin.Int);
+   procedure Check_Error (Stream : in Z_Stream; Code : in Thin.Int);

   procedure Free is new Ada.Unchecked_Deallocation
      (Z_Stream, Z_Stream_Access);
@@ -118,7 +118,7 @@ package body ZLib is
   -- Check_Error --
   -----------------

-   procedure Check_Error (Stream : Z_Stream; Code : Thin.Int) is
+   procedure Check_Error (Stream : in Z_Stream; Code : in Thin.Int) is
      use type Thin.Int;
   begin
      if Code /= Thin.Z_OK then
@@ -138,10 +138,11 @@ package body ZLib is
   is
      Code : Thin.Int;
   begin
-      Code := Flate (Filter.Compression).Done
-          (To_Thin_Access (Filter.Strm));
+      if not Ignore_Error and then not Is_Open (Filter) then
+         raise Status_Error;
+      end if;

-      Filter.Opened := False;
+      Code := Flate (Filter.Compression).Done (To_Thin_Access (Filter.Strm));

      if Ignore_Error or else Code = Thin.Z_OK then
         Free (Filter.Strm);
@@ -170,9 +171,8 @@ package body ZLib is
   is
      use Thin;
   begin
-      return Unsigned_32 (crc32
-        (ULong (CRC),
-         Bytes.To_Pointer (Data'Address),
+      return Unsigned_32 (crc32 (ULong (CRC),
+                                 Data'Address,
                                 Data'Length));
   end CRC32;

@@ -192,13 +192,17 @@ package body ZLib is
      Level        : in     Compression_Level  := Default_Compression;
      Strategy     : in     Strategy_Type      := Default_Strategy;
      Method       : in     Compression_Method := Deflated;
-      Window_Bits  : in     Window_Bits_Type   := 15;
-      Memory_Level : in     Memory_Level_Type  := 8;
+      Window_Bits  : in     Window_Bits_Type   := Default_Window_Bits;
+      Memory_Level : in     Memory_Level_Type  := Default_Memory_Level;
      Header       : in     Header_Type        := Default)
   is
      use type Thin.Int;
      Win_Bits : Thin.Int := Thin.Int (Window_Bits);
   begin
+      if Is_Open (Filter) then
+         raise Status_Error;
+      end if;
+
      --  We allow ZLib to make header only in case of default header type.
      --  Otherwise we would either do header by ourselfs, or do not do
      --  header at all.
@@ -219,7 +223,6 @@ package body ZLib is
      Filter.Strm        := new Z_Stream;
      Filter.Compression := True;
      Filter.Stream_End  := False;
-      Filter.Opened      := True;
      Filter.Header      := Header;

      if Thin.Deflate_Init
@@ -256,8 +259,8 @@ package body ZLib is

   procedure Generic_Translate
     (Filter          : in out ZLib.Filter_Type;
-      In_Buffer_Size  : Integer := Default_Buffer_Size;
-      Out_Buffer_Size : Integer := Default_Buffer_Size)
+      In_Buffer_Size  : in     Integer := Default_Buffer_Size;
+      Out_Buffer_Size : in     Integer := Default_Buffer_Size)
   is
      In_Buffer  : Stream_Element_Array
                     (1 .. Stream_Element_Offset (In_Buffer_Size));
@@ -275,18 +278,21 @@ package body ZLib is

         loop
            Translate
-              (Filter,
-               In_Buffer (In_First .. Last),
-               In_Last,
-               Out_Buffer,
-               Out_Last,
-               Flush_Finish (Last < In_Buffer'First));
+              (Filter   => Filter,
+               In_Data  => In_Buffer (In_First .. Last),
+               In_Last  => In_Last,
+               Out_Data => Out_Buffer,
+               Out_Last => Out_Last,
+               Flush    => Flush_Finish (Last < In_Buffer'First));

+            if Out_Buffer'First <= Out_Last then
               Data_Out (Out_Buffer (Out_Buffer'First .. Out_Last));
+            end if;

            exit Main when Stream_End (Filter);

            --  The end of in buffer.
+
            exit when In_Last = Last;

            In_First := In_Last + 1;
@@ -301,7 +307,7 @@ package body ZLib is

   procedure Inflate_Init
     (Filter      : in out Filter_Type;
-      Window_Bits : in     Window_Bits_Type := 15;
+      Window_Bits : in     Window_Bits_Type := Default_Window_Bits;
      Header      : in     Header_Type      := Default)
   is
      use type Thin.Int;
@@ -320,6 +326,10 @@ package body ZLib is
      end Check_Version;

   begin
+      if Is_Open (Filter) then
+         raise Status_Error;
+      end if;
+
      case Header is
         when None =>
            Check_Version;
@@ -347,7 +357,6 @@ package body ZLib is
      Filter.Strm        := new Z_Stream;
      Filter.Compression := False;
      Filter.Stream_End  := False;
-      Filter.Opened      := True;
      Filter.Header      := Header;

      if Thin.Inflate_Init
@@ -357,16 +366,25 @@ package body ZLib is
      end if;
   end Inflate_Init;

+   -------------
+   -- Is_Open --
+   -------------
+
+   function Is_Open (Filter : in Filter_Type) return Boolean is
+   begin
+      return Filter.Strm /= null;
+   end Is_Open;
+
   -----------------
   -- Raise_Error --
   -----------------

-   procedure Raise_Error (Message : String) is
+   procedure Raise_Error (Message : in String) is
   begin
      Ada.Exceptions.Raise_Exception (ZLib_Error'Identity, Message);
   end Raise_Error;

-   procedure Raise_Error (Stream : Z_Stream) is
+   procedure Raise_Error (Stream : in Z_Stream) is
   begin
      Raise_Error (Last_Error_Message (Stream));
   end Raise_Error;
@@ -378,21 +396,29 @@ package body ZLib is
   procedure Read
     (Filter : in out Filter_Type;
      Item   :    out Ada.Streams.Stream_Element_Array;
-      Last   :    out Ada.Streams.Stream_Element_Offset)
+      Last   :    out Ada.Streams.Stream_Element_Offset;
+      Flush  : in     Flush_Mode := No_Flush)
   is
      In_Last    : Stream_Element_Offset;
      Item_First : Ada.Streams.Stream_Element_Offset := Item'First;
+      V_Flush    : Flush_Mode := Flush;

   begin
      pragma Assert (Rest_First in Buffer'First .. Buffer'Last + 1);
+      pragma Assert (Rest_Last in Buffer'First - 1 .. Buffer'Last);

      loop
-         if Rest_First > Buffer'Last then
+         if Rest_Last = Buffer'First - 1 then
+            V_Flush := Finish;
+
+         elsif Rest_First > Rest_Last then
            Read (Buffer, Rest_Last);
            Rest_First := Buffer'First;
-         end if;

-         pragma Assert (Rest_Last in Buffer'First - 1 .. Buffer'Last);
+            if Rest_Last < Buffer'First then
+               V_Flush := Finish;
+            end if;
+         end if;

         Translate
           (Filter   => Filter,
@@ -400,11 +426,13 @@ package body ZLib is
            In_Last  => In_Last,
            Out_Data => Item (Item_First .. Item'Last),
            Out_Last => Last,
-            Flush    => Flush_Finish (Rest_Last < Rest_First));
+            Flush    => V_Flush);

         Rest_First := In_Last + 1;

-         exit when Last = Item'Last or else Stream_End (Filter);
+         exit when Stream_End (Filter)
+           or else Last = Item'Last
+           or else (Last >= Item'First and then Allow_Read_Some);

         Item_First := Last + 1;
      end loop;
@@ -489,11 +517,11 @@ package body ZLib is
      Code : Thin.Int;

   begin
-      if Filter.Opened = False then
-         raise ZLib_Error;
+      if not Is_Open (Filter) then
+         raise Status_Error;
      end if;

-      if Out_Data'Length = 0 then
+      if Out_Data'Length = 0 and then In_Data'Length = 0 then
         raise Constraint_Error;
      end if;

@@ -514,7 +542,6 @@ package body ZLib is
         - Stream_Element_Offset (Avail_In (Filter.Strm.all));
      Out_Last := Out_Data'Last
         - Stream_Element_Offset (Avail_Out (Filter.Strm.all));
-
   end Translate_Auto;

   --------------------
@@ -604,7 +631,6 @@ package body ZLib is
            Flush    => Flush);

         CRC32 (Filter.CRC, In_Data (In_Data'First .. In_Last));
-
      end if;

      if Filter.Stream_End and then Out_Last <= Out_Data'Last then
@@ -642,10 +668,11 @@ package body ZLib is
   procedure Write
     (Filter : in out Filter_Type;
      Item   : in     Ada.Streams.Stream_Element_Array;
-      Flush  : in     Flush_Mode)
+      Flush  : in     Flush_Mode := No_Flush)
   is
      Buffer   : Stream_Element_Array (1 .. Buffer_Size);
-      In_Last, Out_Last : Stream_Element_Offset;
+      In_Last  : Stream_Element_Offset;
+      Out_Last : Stream_Element_Offset;
      In_First : Stream_Element_Offset := Item'First;
   begin
      if Item'Length = 0 and Flush = No_Flush then
--- a/contrib/ada/zlib.ads
+++ b/contrib/ada/zlib.ads
@@ -1,7 +1,7 @@
 ------------------------------------------------------------------------------
 --                      ZLib for Ada thick binding.                         --
 --                                                                          --
--              Copyright (C) 2002-2003 Dmitriy Anisimkov                   --
+--              Copyright (C) 2002-2004 Dmitriy Anisimkov                   --
 --                                                                          --
 --  This library is free software; you can redistribute it and/or modify    --
 --  it under the terms of the GNU General Public License as published by    --
@@ -25,7 +25,7 @@
 --  covered by the  GNU Public License.                                     --
 ------------------------------------------------------------------------------

--  $Id: zlib.ads,v 1.17 2003/08/12 13:19:07 vagul Exp $
+--  $Id: zlib.ads,v 1.26 2004/09/06 06:53:19 vagul Exp $

 with Ada.Streams;

@@ -34,6 +34,7 @@ with Interfaces;
 package ZLib is

   ZLib_Error   : exception;
+   Status_Error : exception;

   type Compression_Level is new Integer range -1 .. 9;

@@ -55,12 +56,15 @@ package ZLib is

   subtype Count is Ada.Streams.Stream_Element_Count;

+   Default_Memory_Level : constant Memory_Level_Type := 8;
+   Default_Window_Bits  : constant Window_Bits_Type  := 15;
+
   ----------------------------------
   -- Compression method constants --
   ----------------------------------

   Deflated : constant Compression_Method;
-   --  Only one method allowed in this ZLib version.
+   --  Only one method allowed in this ZLib version

   ---------------------------------
   -- Compression level constants --
@@ -79,21 +83,29 @@ package ZLib is
   --  Regular way for compression, no flush

   Partial_Flush : constant Flush_Mode;
-   --  will be removed, use Z_SYNC_FLUSH instead
+   --  Will be removed, use Z_SYNC_FLUSH instead

   Sync_Flush    : constant Flush_Mode;
-   --  all pending output is flushed to the output buffer and the output
+   --  All pending output is flushed to the output buffer and the output
   --  is aligned on a byte boundary, so that the decompressor can get all
   --  input data available so far. (In particular avail_in is zero after the
   --  call if enough output space has been provided  before the call.)
   --  Flushing may degrade compression for some compression algorithms and so
   --  it should be used only when necessary.

+   Block_Flush   : constant Flush_Mode;
+   --  Z_BLOCK requests that inflate() stop
+   --  if and when it get to the next deflate block boundary. When decoding the
+   --  zlib or gzip format, this will cause inflate() to return immediately
+   --  after the header and before the first block. When doing a raw inflate,
+   --  inflate() will go ahead and process the first block, and will return
+   --  when it gets to the end of that block, or when it runs out of data.
+
   Full_Flush    : constant Flush_Mode;
-   --  all output is flushed as with SYNC_FLUSH, and the compression state
+   --  All output is flushed as with SYNC_FLUSH, and the compression state
   --  is reset so that decompression can restart from this point if previous
   --  compressed data has been damaged or if random access is desired. Using
-   --  FULL_FLUSH too often can seriously degrade the compression.
+   --  Full_Flush too often can seriously degrade the compression.

   Finish        : constant Flush_Mode;
   --  Just for tell the compressor that input data is complete.
@@ -111,7 +123,7 @@ package ZLib is

   Default_Buffer_Size : constant := 4096;

-   type Filter_Type is limited private;
+   type Filter_Type is tagged limited private;
   --  The filter is for compression and for decompression.
   --  The usage of the type is depend of its initialization.

@@ -124,8 +136,8 @@ package ZLib is
      Level        : in     Compression_Level  := Default_Compression;
      Strategy     : in     Strategy_Type      := Default_Strategy;
      Method       : in     Compression_Method := Deflated;
-      Window_Bits  : in     Window_Bits_Type   := 15;
-      Memory_Level : in     Memory_Level_Type  := 8;
+      Window_Bits  : in     Window_Bits_Type   := Default_Window_Bits;
+      Memory_Level : in     Memory_Level_Type  := Default_Memory_Level;
      Header       : in     Header_Type        := Default);
   --  Compressor initialization.
   --  When Header parameter is Auto or Default, then default zlib header
@@ -136,7 +148,7 @@ package ZLib is

   procedure Inflate_Init
     (Filter      : in out Filter_Type;
-      Window_Bits : in     Window_Bits_Type := 15;
+      Window_Bits : in     Window_Bits_Type := Default_Window_Bits;
      Header      : in     Header_Type      := Default);
   --  Decompressor initialization.
   --  Default header type mean that ZLib default header is expecting in the
@@ -146,10 +158,14 @@ package ZLib is
   --  input compressed stream.
   --  Auto header type mean that header type (GZip or Native) would be
   --  detected automatically in the input stream.
-   --  Note that header types parameter values None, GZip and Auto is
-   --  supporting for inflate routine only in ZLib versions 1.2.0.2 and later.
+   --  Note that header types parameter values None, GZip and Auto are
+   --  supported for inflate routine only in ZLib versions 1.2.0.2 and later.
   --  Deflate_Init is supporting all header types.

+   function Is_Open (Filter : in Filter_Type) return Boolean;
+   pragma Inline (Is_Open);
+   --  Is the filter opened for compression or decompression.
+
   procedure Close
     (Filter       : in out Filter_Type;
      Ignore_Error : in     Boolean := False);
@@ -167,31 +183,31 @@ package ZLib is
     (Filter          : in out Filter_Type;
      In_Buffer_Size  : in     Integer := Default_Buffer_Size;
      Out_Buffer_Size : in     Integer := Default_Buffer_Size);
-   --  Compressing/decompressing data arrived from Data_In routine
+   --  Compress/decompress data fetch from Data_In routine and pass the result
   --  to the Data_Out routine. User should provide Data_In and Data_Out
   --  for compression/decompression data flow.
-   --  Compression or decompression depend on initialization of Filter.
+   --  Compression or decompression depend on Filter initialization.

   function Total_In (Filter : in Filter_Type) return Count;
   pragma Inline (Total_In);
-   --  Return total number of input bytes read so far.
+   --  Returns total number of input bytes read so far

   function Total_Out (Filter : in Filter_Type) return Count;
   pragma Inline (Total_Out);
-   --  Return total number of bytes output so far.
+   --  Returns total number of bytes output so far

   function CRC32
     (CRC    : in Unsigned_32;
      Data   : in Ada.Streams.Stream_Element_Array)
      return Unsigned_32;
   pragma Inline (CRC32);
-   --  Calculate CRC32, it could be necessary for make gzip format.
+   --  Compute CRC32, it could be necessary for make gzip format

   procedure CRC32
     (CRC  : in out Unsigned_32;
      Data : in     Ada.Streams.Stream_Element_Array);
   pragma Inline (CRC32);
-   --  Calculate CRC32, it could be necessary for make gzip format.
+   --  Compute CRC32, it could be necessary for make gzip format

   -------------------------------------------------
   --  Below is more complex low level routines.  --
@@ -204,15 +220,11 @@ package ZLib is
      Out_Data  :    out Ada.Streams.Stream_Element_Array;
      Out_Last  :    out Ada.Streams.Stream_Element_Offset;
      Flush     : in     Flush_Mode);
-   --  Compressing/decompressing the datas from In_Data buffer to the
-   --  Out_Data buffer.
-   --  In_Data is incoming data portion,
-   --  In_Last is the index of last element from In_Data accepted by the
-   --  Filter.
-   --  Out_Data is the buffer for output data from the filter.
-   --  Out_Last is the last element of the received data from Filter.
-   --  To tell the filter that incoming data is complete put the
-   --  Flush parameter to FINISH.
+   --  Compress/decompress the In_Data buffer and place the result into
+   --  Out_Data. In_Last is the index of last element from In_Data accepted by
+   --  the Filter. Out_Last is the last element of the received data from
+   --  Filter. To tell the filter that incoming data are complete put the
+   --  Flush parameter to Finish.

   function Stream_End (Filter : in Filter_Type) return Boolean;
   pragma Inline (Stream_End);
@@ -239,10 +251,9 @@ package ZLib is
   procedure Write
     (Filter  : in out Filter_Type;
      Item    : in     Ada.Streams.Stream_Element_Array;
-      Flush   : in     Flush_Mode);
-   --  Compressing/Decompressing data from Item to the
-   --  generic parameter procedure Write.
-   --  Output buffer size could be set in Buffer_Size generic parameter.
+      Flush   : in     Flush_Mode := No_Flush);
+   --  Compress/Decompress data from Item to the generic parameter procedure
+   --  Write. Output buffer size could be set in Buffer_Size generic parameter.

   generic
      with procedure Read
@@ -257,33 +268,41 @@ package ZLib is

      Rest_First, Rest_Last : in out Ada.Streams.Stream_Element_Offset;
      --  Rest_First have to be initialized to Buffer'Last + 1
+      --  Rest_Last have to be initialized to Buffer'Last
      --  before usage.

+      Allow_Read_Some : in Boolean := False;
+      --  Is it allowed to return Last < Item'Last before end of data.
+
   procedure Read
     (Filter : in out Filter_Type;
      Item   :    out Ada.Streams.Stream_Element_Array;
-      Last   :    out Ada.Streams.Stream_Element_Offset);
-   --  Compressing/Decompressing data from generic parameter
-   --  procedure Read to the Item.
-   --  User should provide Buffer for the operation
-   --  and Rest_First variable first time initialized to the Buffer'Last + 1.
+      Last   :    out Ada.Streams.Stream_Element_Offset;
+      Flush  : in     Flush_Mode := No_Flush);
+   --  Compress/Decompress data from generic parameter procedure Read to the
+   --  Item. User should provide Buffer and initialized Rest_First, Rest_Last
+   --  indicators. If Allow_Read_Some is True, Read routines could return
+   --  Last < Item'Last only at end of stream.

 private

   use Ada.Streams;

-   type Flush_Mode is new Integer range 0 .. 4;
+   pragma Assert (Ada.Streams.Stream_Element'Size    =    8);
+   pragma Assert (Ada.Streams.Stream_Element'Modulus = 2**8);
+
+   type Flush_Mode is new Integer range 0 .. 5;

   type Compression_Method is new Integer range 8 .. 8;

   type Strategy_Type is new Integer range 0 .. 3;

   No_Flush      : constant Flush_Mode := 0;
+   Partial_Flush : constant Flush_Mode := 1;
   Sync_Flush    : constant Flush_Mode := 2;
   Full_Flush    : constant Flush_Mode := 3;
   Finish        : constant Flush_Mode := 4;
-   Partial_Flush : constant Flush_Mode := 1;
-   --  will be removed, use Z_SYNC_FLUSH instead
+   Block_Flush   : constant Flush_Mode := 5;

   Filtered         : constant Strategy_Type := 1;
   Huffman_Only     : constant Strategy_Type := 2;
@@ -296,7 +315,7 @@ private

   type Z_Stream_Access is access all Z_Stream;

-   type Filter_Type is record
+   type Filter_Type is tagged limited record
      Strm        : Z_Stream_Access;
      Compression : Boolean;
      Stream_End  : Boolean;
@@ -304,8 +323,6 @@ private
      CRC         : Unsigned_32;
      Offset      : Stream_Element_Offset;
      --  Offset for gzip header/footer output.
-
-      Opened      : Boolean := False;
   end record;

 end ZLib;
--- a/contrib/ada/zlib.gpr
+++ b/contrib/ada/zlib.gpr
@@ -3,10 +3,10 @@ project Zlib is
   for Languages use ("Ada");
   for Source_Dirs use (".");
   for Object_Dir use ".";
-   for Main use ("test.adb", "mtest.adb", "read.adb");
+   for Main use ("test.adb", "mtest.adb", "read.adb", "buffer_demo");

   package Compiler is
-      for Default_Switches ("ada") use ("-gnatwbcfilopru", "-gnatVcdfimorst", "-gnatyabcefhiklmnoprst");
+      for Default_Switches ("ada") use ("-gnatwcfilopru", "-gnatVcdfimorst", "-gnatyabcefhiklmnoprst");
   end Compiler;

   package Linker is
@@ -18,4 +18,3 @@ project Zlib is
   end Builder;

 end Zlib;
-
--- a/contrib/delphi/ZLib.pas
+++ b/contrib/delphi/ZLib.pas
@@ -152,7 +152,7 @@ procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
  const OutBuf: Pointer; BufSize: Integer);

 const
-  zlib_version = '1.2.0';
+  zlib_version = '1.2.2';

 type
  EZlibError = class(Exception);
--- a/contrib/delphi/readme.txt
+++ b/contrib/delphi/readme.txt
@@ -14,7 +14,7 @@ we recommend the users to update their ZLib unit.
 Summary of modifications
 ========================

- Improved makefile, adapted to zlib version 1.2.0.
+- Improved makefile, adapted to zlib version 1.2.1.

 - Some field types from TZStreamRec are changed from Integer to
  Longint, for consistency with the zlib.h header, and for 64-bit
--- a/contrib/dotzlib/DotZLib.build
+++ b/contrib/dotzlib/DotZLib.build
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<project name="DotZLib" default="build" basedir="./DotZLib">
+	<description>A .Net wrapper library around ZLib1.dll</description>
+
+	<property name="nunit.location" value="c:/program files/NUnit V2.1/bin" />
+	<property name="build.root" value="bin" />
+	
+	<property name="debug" value="true" />
+	<property name="nunit" value="true" />
+
+	<property name="build.folder" value="${build.root}/debug/" if="${debug}" />
+	<property name="build.folder" value="${build.root}/release/" unless="${debug}" />
+
+	<target name="clean" description="Remove all generated files">
+		<delete dir="${build.root}" failonerror="false" />
+	</target>
+
+	<target name="build" description="compiles the source code">
+		
+		<mkdir dir="${build.folder}" />
+		<csc target="library" output="${build.folder}DotZLib.dll" debug="${debug}">
+			<references basedir="${nunit.location}">
+				<includes if="${nunit}" name="nunit.framework.dll" />
+			</references>
+			<sources>
+				<includes name="*.cs" />
+				<excludes name="UnitTests.cs" unless="${nunit}" />
+			</sources>
+			<arg value="/d:nunit" if="${nunit}" />
+		</csc>
+	</target>
+
+</project>
--- a/contrib/dotzlib/DotZLib.chm
+++ b/contrib/dotzlib/DotZLib.chm
--- a/contrib/dotzlib/DotZLib.sln
+++ b/contrib/dotzlib/DotZLib.sln
@@ -0,0 +1,21 @@
+Microsoft Visual Studio Solution File, Format Version 8.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotZLib", "DotZLib\DotZLib.csproj", "{BB1EE0B1-1808-46CB-B786-949D91117FC5}"
+	ProjectSection(ProjectDependencies) = postProject
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfiguration) = preSolution
+		Debug = Debug
+		Release = Release
+	EndGlobalSection
+	GlobalSection(ProjectConfiguration) = postSolution
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Debug.ActiveCfg = Debug|.NET
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Debug.Build.0 = Debug|.NET
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Release.ActiveCfg = Release|.NET
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Release.Build.0 = Release|.NET
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+	EndGlobalSection
+	GlobalSection(ExtensibilityAddIns) = postSolution
+	EndGlobalSection
+EndGlobal
--- a/contrib/dotzlib/DotZLib/AssemblyInfo.cs
+++ b/contrib/dotzlib/DotZLib/AssemblyInfo.cs
@@ -0,0 +1,58 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+//
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+//
+[assembly: AssemblyTitle("DotZLib")]
+[assembly: AssemblyDescription(".Net bindings for ZLib compression dll 1.2.x")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Henrik Ravn")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("(c) 2004 by Henrik Ravn")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]		
+
+//
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Revision and Build Numbers 
+// by using the '*' as shown below:
+
+[assembly: AssemblyVersion("1.0.*")]
+
+//
+// In order to sign your assembly you must specify a key to use. Refer to the 
+// Microsoft .NET Framework documentation for more information on assembly signing.
+//
+// Use the attributes below to control which key is used for signing. 
+//
+// Notes: 
+//   (*) If no key is specified, the assembly is not signed.
+//   (*) KeyName refers to a key that has been installed in the Crypto Service
+//       Provider (CSP) on your machine. KeyFile refers to a file which contains
+//       a key.
+//   (*) If the KeyFile and the KeyName values are both specified, the 
+//       following processing occurs:
+//       (1) If the KeyName can be found in the CSP, that key is used.
+//       (2) If the KeyName does not exist and the KeyFile does exist, the key 
+//           in the KeyFile is installed into the CSP and used.
+//   (*) In order to create a KeyFile, you can use the sn.exe (Strong Name) utility.
+//       When specifying the KeyFile, the location of the KeyFile should be
+//       relative to the project output directory which is
+//       %Project Directory%\obj\<configuration>. For example, if your KeyFile is
+//       located in the project directory, you would specify the AssemblyKeyFile 
+//       attribute as [assembly: AssemblyKeyFile("..\\..\\mykey.snk")]
+//   (*) Delay Signing is an advanced option - see the Microsoft .NET Framework
+//       documentation for more information on this.
+//
+[assembly: AssemblyDelaySign(false)]
+[assembly: AssemblyKeyFile("")]
+[assembly: AssemblyKeyName("")]
--- a/contrib/dotzlib/DotZLib/ChecksumImpl.cs
+++ b/contrib/dotzlib/DotZLib/ChecksumImpl.cs
@@ -0,0 +1,202 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+
+namespace DotZLib
+{
+    #region ChecksumGeneratorBase
+    /// <summary>
+    /// Implements the common functionality needed for all <see cref="ChecksumGenerator"/>s
+    /// </summary>
+    /// <example></example>
+    public abstract class ChecksumGeneratorBase : ChecksumGenerator
+    {
+        /// <summary>
+        /// The value of the current checksum
+        /// </summary>
+        protected uint _current;
+
+        /// <summary>
+        /// Initializes a new instance of the checksum generator base - the current checksum is 
+        /// set to zero
+        /// </summary>
+        public ChecksumGeneratorBase()
+        {
+            _current = 0;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the checksum generator basewith a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public ChecksumGeneratorBase(uint initialValue)
+        {
+            _current = initialValue;
+        }
+
+        /// <summary>
+        /// Resets the current checksum to zero
+        /// </summary>
+        public void Reset() { _current = 0; }
+
+        /// <summary>
+        /// Gets the current checksum value
+        /// </summary>
+        public uint Value { get { return _current; } }
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        /// <remarks>All the other <c>Update</c> methods are implmeneted in terms of this one. 
+        /// This is therefore the only method a derived class has to implement</remarks>
+        public abstract void Update(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Updates the current checksum with an array of bytes.
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        public void Update(byte[] data)
+        {
+            Update(data, 0, data.Length);
+        }
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
+        public void Update(string data)
+        {
+			Update(Encoding.UTF8.GetBytes(data));
+        }
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string, using a specific encoding
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <param name="encoding">The encoding to use</param>
+        public void Update(string data, Encoding encoding)
+        {
+            Update(encoding.GetBytes(data));
+        }
+
+    }
+    #endregion
+
+    #region CRC32
+    /// <summary>
+    /// Implements a CRC32 checksum generator
+    /// </summary>
+    public sealed class CRC32Checksum : ChecksumGeneratorBase    
+    {
+        #region DLL imports
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern uint crc32(uint crc, int data, uint length);
+
+        #endregion
+
+        /// <summary>
+        /// Initializes a new instance of the CRC32 checksum generator
+        /// </summary>
+        public CRC32Checksum() : base() {}
+
+        /// <summary>
+        /// Initializes a new instance of the CRC32 checksum generator with a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public CRC32Checksum(uint initialValue) : base(initialValue) {}
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        public override void Update(byte[] data, int offset, int count)
+        {
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+            GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
+            try
+            {
+                _current = crc32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
+            }
+            finally
+            {
+                hData.Free();
+            }
+        }
+
+    }
+    #endregion
+
+    #region Adler
+    /// <summary>
+    /// Implements a checksum generator that computes the Adler checksum on data
+    /// </summary>
+    public sealed class AdlerChecksum : ChecksumGeneratorBase    
+    {
+        #region DLL imports
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern uint adler32(uint adler, int data, uint length);
+
+        #endregion
+
+        /// <summary>
+        /// Initializes a new instance of the Adler checksum generator
+        /// </summary>
+        public AdlerChecksum() : base() {}
+
+        /// <summary>
+        /// Initializes a new instance of the Adler checksum generator with a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public AdlerChecksum(uint initialValue) : base(initialValue) {}
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        public override void Update(byte[] data, int offset, int count)
+        {
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+            GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
+            try
+            {
+                _current = adler32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
+            }
+            finally
+            {
+                hData.Free();
+            }
+        }
+
+    }
+    #endregion
+
+}
--- a/contrib/dotzlib/DotZLib/CircularBuffer.cs
+++ b/contrib/dotzlib/DotZLib/CircularBuffer.cs
@@ -0,0 +1,83 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+
+namespace DotZLib
+{
+
+	/// <summary>
+	/// This class implements a circular buffer
+	/// </summary>
+	internal class CircularBuffer
+	{
+        #region Private data
+        private int _capacity;
+        private int _head;
+        private int _tail;
+        private int _size;
+        private byte[] _buffer;
+        #endregion
+
+        public CircularBuffer(int capacity)
+        {    
+            Debug.Assert( capacity > 0 );
+            _buffer = new byte[capacity];
+            _capacity = capacity;
+            _head = 0;
+            _tail = 0;
+            _size = 0;
+        }
+
+        public int Size { get { return _size; } }
+
+        public int Put(byte[] source, int offset, int count)
+        {
+            Debug.Assert( count > 0 );
+            int trueCount = Math.Min(count, _capacity - Size);
+            for (int i = 0; i < trueCount; ++i)
+                _buffer[(_tail+i) % _capacity] = source[offset+i];
+            _tail += trueCount;
+            _tail %= _capacity;
+            _size += trueCount;
+            return trueCount;
+        }
+
+        public bool Put(byte b)
+        {
+            if (Size == _capacity) // no room
+                return false;
+            _buffer[_tail++] = b;
+            _tail %= _capacity;
+            ++_size;
+            return true;
+        }
+
+        public int Get(byte[] destination, int offset, int count)
+        {
+            int trueCount = Math.Min(count,Size);
+            for (int i = 0; i < trueCount; ++i)
+                destination[offset + i] = _buffer[(_head+i) % _capacity];
+            _head += trueCount;
+            _head %= _capacity;
+            _size -= trueCount;
+            return trueCount;
+        }
+
+        public int Get()
+        {
+            if (Size == 0)
+                return -1;
+
+            int result = (int)_buffer[_head++ % _capacity];
+            --_size;
+            return result;
+        }
+
+    }
+}
--- a/contrib/dotzlib/DotZLib/CodecBase.cs
+++ b/contrib/dotzlib/DotZLib/CodecBase.cs
@@ -0,0 +1,198 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+	/// <summary>
+	/// Implements the common functionality needed for all <see cref="Codec"/>s
+	/// </summary>
+	public abstract class CodecBase : Codec, IDisposable
+	{
+
+        #region Data members
+
+        /// <summary>
+        /// Instance of the internal zlib buffer structure that is 
+        /// passed to all functions in the zlib dll
+        /// </summary>
+        internal ZStream _ztream = new ZStream();
+
+        /// <summary>
+        /// True if the object instance has been disposed, false otherwise
+        /// </summary>
+        protected bool _isDisposed = false;
+
+        /// <summary>
+        /// The size of the internal buffers
+        /// </summary>
+        protected const int kBufferSize = 16384;
+
+        private byte[] _outBuffer = new byte[kBufferSize];
+        private byte[] _inBuffer = new byte[kBufferSize];
+
+        private GCHandle _hInput;
+        private GCHandle _hOutput;
+
+        private uint _checksum = 0;
+
+        #endregion
+
+        /// <summary>
+        /// Initializes a new instance of the <c>CodeBase</c> class. 
+        /// </summary>
+		public CodecBase()
+		{
+            try
+            {
+                _hInput = GCHandle.Alloc(_inBuffer, GCHandleType.Pinned);
+                _hOutput = GCHandle.Alloc(_outBuffer, GCHandleType.Pinned);
+            }
+            catch (Exception)
+            {
+                CleanUp(false);
+                throw;
+            }
+        }
+
+
+        #region Codec Members
+
+        /// <summary>
+        /// Occurs when more processed data are available.
+        /// </summary>
+        public event DataAvailableHandler DataAvailable;
+
+        /// <summary>
+        /// Fires the <see cref="DataAvailable"/> event
+        /// </summary>
+        protected void OnDataAvailable()
+        {
+            if (_ztream.total_out > 0)
+            {
+                if (DataAvailable != null)
+                    DataAvailable( _outBuffer, 0, (int)_ztream.total_out); 
+                resetOutput();
+            }
+        }
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        public void Add(byte[] data)
+        {
+            Add(data,0,data.Length);
+        }
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        public abstract void Add(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        public abstract void Finish();
+
+        /// <summary>
+        /// Gets the checksum of the data that has been added so far
+        /// </summary>
+        public uint Checksum { get { return _checksum; } }
+
+        #endregion
+
+        #region Destructor & IDisposable stuff
+
+        /// <summary>
+        /// Destroys this instance
+        /// </summary>
+        ~CodecBase()
+        {
+            CleanUp(false);
+        }
+
+        /// <summary>
+        /// Releases any unmanaged resources and calls the <see cref="CleanUp()"/> method of the derived class
+        /// </summary>
+        public void Dispose()
+        {
+            CleanUp(true);
+        }
+
+        /// <summary>
+        /// Performs any codec specific cleanup
+        /// </summary>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        protected abstract void CleanUp();
+
+        // performs the release of the handles and calls the dereived CleanUp()
+        private void CleanUp(bool isDisposing)
+        {
+            if (!_isDisposed)
+            {
+                CleanUp();
+                if (_hInput.IsAllocated)
+                    _hInput.Free();
+                if (_hOutput.IsAllocated)
+                    _hOutput.Free();
+
+                _isDisposed = true;
+            }
+        }
+
+
+        #endregion
+
+        #region Helper methods
+
+        /// <summary>
+        /// Copies a number of bytes to the internal codec buffer - ready for proccesing
+        /// </summary>
+        /// <param name="data">The byte array that contains the data to copy</param>
+        /// <param name="startIndex">The index of the first byte to copy</param>
+        /// <param name="count">The number of bytes to copy from <c>data</c></param>
+        protected void copyInput(byte[] data, int startIndex, int count)
+        {
+            Array.Copy(data, startIndex, _inBuffer,0, count);
+            _ztream.next_in = _hInput.AddrOfPinnedObject();
+            _ztream.total_in = 0;
+            _ztream.avail_in = (uint)count;
+
+        }
+
+        /// <summary>
+        /// Resets the internal output buffers to a known state - ready for processing
+        /// </summary>
+        protected void resetOutput()
+        {
+            _ztream.total_out = 0;
+            _ztream.avail_out = kBufferSize;
+            _ztream.next_out = _hOutput.AddrOfPinnedObject();
+        }
+
+        /// <summary>
+        /// Updates the running checksum property
+        /// </summary>
+        /// <param name="newSum">The new checksum value</param>
+        protected void setChecksum(uint newSum)
+        {
+            _checksum = newSum;
+        }
+        #endregion
+
+    }
+}
--- a/contrib/dotzlib/DotZLib/Deflater.cs
+++ b/contrib/dotzlib/DotZLib/Deflater.cs
@@ -0,0 +1,106 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+
+    /// <summary>
+    /// Implements a data compressor, using the deflate algorithm in the ZLib dll
+    /// </summary>
+	public sealed class Deflater : CodecBase
+	{
+        #region Dll imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+        private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int deflate(ref ZStream sz, int flush);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int deflateReset(ref ZStream sz);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int deflateEnd(ref ZStream sz);
+        #endregion
+
+        /// <summary>
+        /// Constructs an new instance of the <c>Deflater</c>
+        /// </summary>
+        /// <param name="level">The compression level to use for this <c>Deflater</c></param>
+		public Deflater(CompressLevel level) : base()
+		{
+            int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream));
+            if (retval != 0)
+                throw new ZLibException(retval, "Could not initialize deflater");
+
+            resetOutput();
+		}
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        public override void Add(byte[] data, int offset, int count)
+        {
+            if (data == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+            
+            int total = count;
+            int inputIndex = offset;
+            int err = 0;
+
+            while (err >= 0 && inputIndex < total)
+            {
+                copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
+                while (err >= 0 && _ztream.avail_in > 0)
+                {
+                    err = deflate(ref _ztream, (int)FlushTypes.None);
+                    if (err == 0)
+                        while (_ztream.avail_out == 0)
+                        {
+                            OnDataAvailable();
+                            err = deflate(ref _ztream, (int)FlushTypes.None);
+                        }
+                    inputIndex += (int)_ztream.total_in;
+                }
+            }
+            setChecksum( _ztream.adler );
+        }
+
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        public override void Finish()
+        {
+            int err;
+            do 
+            {
+                err = deflate(ref _ztream, (int)FlushTypes.Finish);
+                OnDataAvailable();
+            }
+            while (err == 0);
+            setChecksum( _ztream.adler );
+            deflateReset(ref _ztream);
+            resetOutput();
+        }
+
+        /// <summary>
+        /// Closes the internal zlib deflate stream
+        /// </summary>
+        protected override void CleanUp() { deflateEnd(ref _ztream); }
+
+    }
+}
--- a/contrib/dotzlib/DotZLib/DotZLib.cs
+++ b/contrib/dotzlib/DotZLib/DotZLib.cs
@@ -0,0 +1,288 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Text;
+
+
+namespace DotZLib
+{
+
+    #region Internal types
+
+    /// <summary>
+    /// Defines constants for the various flush types used with zlib
+    /// </summary>
+    internal enum FlushTypes 
+    {
+        None,  Partial,  Sync,  Full,  Finish,  Block
+    }
+
+    #region ZStream structure
+    // internal mapping of the zlib zstream structure for marshalling
+    [StructLayoutAttribute(LayoutKind.Sequential, Pack=4, Size=0, CharSet=CharSet.Ansi)]
+    internal struct ZStream
+    {
+        public IntPtr next_in;
+        public uint avail_in;
+        public uint total_in;
+
+        public IntPtr next_out;
+        public uint avail_out;
+        public uint total_out;
+
+        [MarshalAs(UnmanagedType.LPStr)]
+        string msg; 
+        uint state;
+
+        uint zalloc;
+        uint zfree;
+        uint opaque;
+
+        int data_type;
+        public uint adler;
+        uint reserved;
+    }
+
+    #endregion
+    
+    #endregion
+
+    #region Public enums
+    /// <summary>
+    /// Defines constants for the available compression levels in zlib
+    /// </summary>
+    public enum CompressLevel : int
+    {
+        /// <summary>
+        /// The default compression level with a reasonable compromise between compression and speed
+        /// </summary>
+        Default = -1,   
+        /// <summary>
+        /// No compression at all. The data are passed straight through.
+        /// </summary>
+        None = 0,
+        /// <summary>
+        /// The maximum compression rate available.
+        /// </summary>
+        Best = 9,   
+        /// <summary>
+        /// The fastest available compression level.
+        /// </summary>
+        Fastest = 1
+    }
+    #endregion
+
+    #region Exception classes
+    /// <summary>
+    /// The exception that is thrown when an error occurs on the zlib dll
+    /// </summary>
+    public class ZLibException : ApplicationException
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified 
+        /// error message and error code
+        /// </summary>
+        /// <param name="errorCode">The zlib error code that caused the exception</param>
+        /// <param name="msg">A message that (hopefully) describes the error</param>
+        public ZLibException(int errorCode, string msg) : base(String.Format("ZLib error {0} {1}", errorCode, msg))
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified 
+        /// error code
+        /// </summary>
+        /// <param name="errorCode">The zlib error code that caused the exception</param>
+        public ZLibException(int errorCode) : base(String.Format("ZLib error {0}", errorCode))
+        {
+        }
+    }
+    #endregion
+
+    #region Interfaces
+
+    /// <summary>
+    /// Declares methods and properties that enables a running checksum to be calculated 
+    /// </summary>
+    public interface ChecksumGenerator
+    {
+        /// <summary>
+        /// Gets the current value of the checksum
+        /// </summary>
+        uint Value { get; }
+
+        /// <summary>
+        /// Clears the current checksum to 0
+        /// </summary>
+        void Reset();
+
+        /// <summary>
+        /// Updates the current checksum with an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        void Update(byte[] data);
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="ArgumentNullException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        void Update(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
+        void Update(string data);
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string, using a specific encoding
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <param name="encoding">The encoding to use</param>
+        void Update(string data, Encoding encoding);
+    }
+
+
+    /// <summary>
+    /// Represents the method that will be called from a codec when new data
+    /// are available.
+    /// </summary>
+    /// <paramref name="data">The byte array containing the processed data</paramref>
+    /// <paramref name="startIndex">The index of the first processed byte in <c>data</c></paramref>
+    /// <paramref name="count">The number of processed bytes available</paramref>
+    /// <remarks>On return from this method, the data may be overwritten, so grab it while you can. 
+    /// You cannot assume that startIndex will be zero.
+    /// </remarks>
+    public delegate void DataAvailableHandler(byte[] data, int startIndex, int count);
+
+    /// <summary>
+    /// Declares methods and events for implementing compressors/decompressors
+    /// </summary>
+    public interface Codec
+    {
+        /// <summary>
+        /// Occurs when more processed data are available.
+        /// </summary>
+        event DataAvailableHandler DataAvailable;
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        void Add(byte[] data);
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        void Add(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        void Finish();
+
+        /// <summary>
+        /// Gets the checksum of the data that has been added so far
+        /// </summary>
+        uint Checksum { get; }
+
+
+    }
+
+    #endregion
+
+    #region Classes
+    /// <summary>
+    /// Encapsulates general information about the ZLib library
+    /// </summary>
+    public class Info
+    {
+        #region DLL imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern uint zlibCompileFlags();
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern string zlibVersion();
+        #endregion
+
+        #region Private stuff
+        private uint _flags;
+
+        // helper function that unpacks a bitsize mask
+        private static int bitSize(uint bits)
+        {
+            switch (bits)
+            {
+                case 0: return 16;
+                case 1: return 32;
+                case 2: return 64;
+            }
+            return -1;
+        }
+        #endregion
+
+        /// <summary>
+        /// Constructs an instance of the <c>Info</c> class.
+        /// </summary>
+        public Info()
+        {
+            _flags = zlibCompileFlags();
+        }
+
+        /// <summary>
+        /// True if the library is compiled with debug info
+        /// </summary>
+        public bool HasDebugInfo { get { return 0 != (_flags & 0x100); } }
+
+        /// <summary>
+        /// True if the library is compiled with assembly optimizations
+        /// </summary>
+        public bool UsesAssemblyCode { get { return 0 != (_flags & 0x200); } }
+
+        /// <summary>
+        /// Gets the size of the unsigned int that was compiled into Zlib
+        /// </summary>
+        public int SizeOfUInt { get { return bitSize(_flags & 3); } }
+
+        /// <summary>
+        /// Gets the size of the unsigned long that was compiled into Zlib
+        /// </summary>
+        public int SizeOfULong { get { return bitSize((_flags >> 2) & 3); } }
+
+        /// <summary>
+        /// Gets the size of the pointers that were compiled into Zlib
+        /// </summary>
+        public int SizeOfPointer { get { return bitSize((_flags >> 4) & 3); } }
+
+        /// <summary>
+        /// Gets the size of the z_off_t type that was compiled into Zlib
+        /// </summary>
+        public int SizeOfOffset { get { return bitSize((_flags >> 6) & 3); } }
+
+        /// <summary>
+        /// Gets the version of ZLib as a string, e.g. "1.2.1"
+        /// </summary>
+        public static string Version { get { return zlibVersion(); } }
+    }
+
+    #endregion
+
+}
--- a/contrib/dotzlib/DotZLib/DotZLib.csproj
+++ b/contrib/dotzlib/DotZLib/DotZLib.csproj
@@ -0,0 +1,141 @@
+<VisualStudioProject>
+    <CSHARP
+        ProjectType = "Local"
+        ProductVersion = "7.10.3077"
+        SchemaVersion = "2.0"
+        ProjectGuid = "{BB1EE0B1-1808-46CB-B786-949D91117FC5}"
+    >
+        <Build>
+            <Settings
+                ApplicationIcon = ""
+                AssemblyKeyContainerName = ""
+                AssemblyName = "DotZLib"
+                AssemblyOriginatorKeyFile = ""
+                DefaultClientScript = "JScript"
+                DefaultHTMLPageLayout = "Grid"
+                DefaultTargetSchema = "IE50"
+                DelaySign = "false"
+                OutputType = "Library"
+                PreBuildEvent = ""
+                PostBuildEvent = ""
+                RootNamespace = "DotZLib"
+                RunPostBuildEvent = "OnBuildSuccess"
+                StartupObject = ""
+            >
+                <Config
+                    Name = "Debug"
+                    AllowUnsafeBlocks = "false"
+                    BaseAddress = "285212672"
+                    CheckForOverflowUnderflow = "false"
+                    ConfigurationOverrideFile = ""
+                    DefineConstants = "DEBUG;TRACE"
+                    DocumentationFile = "docs\DotZLib.xml"
+                    DebugSymbols = "true"
+                    FileAlignment = "4096"
+                    IncrementalBuild = "false"
+                    NoStdLib = "false"
+                    NoWarn = "1591"
+                    Optimize = "false"
+                    OutputPath = "bin\Debug\"
+                    RegisterForComInterop = "false"
+                    RemoveIntegerChecks = "false"
+                    TreatWarningsAsErrors = "false"
+                    WarningLevel = "4"
+                />
+                <Config
+                    Name = "Release"
+                    AllowUnsafeBlocks = "false"
+                    BaseAddress = "285212672"
+                    CheckForOverflowUnderflow = "false"
+                    ConfigurationOverrideFile = ""
+                    DefineConstants = "TRACE"
+                    DocumentationFile = "docs\DotZLib.xml"
+                    DebugSymbols = "false"
+                    FileAlignment = "4096"
+                    IncrementalBuild = "false"
+                    NoStdLib = "false"
+                    NoWarn = ""
+                    Optimize = "true"
+                    OutputPath = "bin\Release\"
+                    RegisterForComInterop = "false"
+                    RemoveIntegerChecks = "false"
+                    TreatWarningsAsErrors = "false"
+                    WarningLevel = "4"
+                />
+            </Settings>
+            <References>
+                <Reference
+                    Name = "System"
+                    AssemblyName = "System"
+                    HintPath = "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\System.dll"
+                />
+                <Reference
+                    Name = "System.Data"
+                    AssemblyName = "System.Data"
+                    HintPath = "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\System.Data.dll"
+                />
+                <Reference
+                    Name = "System.XML"
+                    AssemblyName = "System.Xml"
+                    HintPath = "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\System.XML.dll"
+                />
+                <Reference
+                    Name = "nunit.framework"
+                    AssemblyName = "nunit.framework"
+                    HintPath = "E:\apps\NUnit V2.1\\bin\nunit.framework.dll"
+                    AssemblyFolderKey = "hklm\dn\nunit.framework"
+                />
+            </References>
+        </Build>
+        <Files>
+            <Include>
+                <File
+                    RelPath = "AssemblyInfo.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "ChecksumImpl.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "CircularBuffer.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "CodecBase.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "Deflater.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "DotZLib.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "GZipStream.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "Inflater.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "UnitTests.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+            </Include>
+        </Files>
+    </CSHARP>
+</VisualStudioProject>
+
--- a/contrib/dotzlib/DotZLib/GZipStream.cs
+++ b/contrib/dotzlib/DotZLib/GZipStream.cs
@@ -0,0 +1,301 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+	/// <summary>
+	/// Implements a compressed <see cref="Stream"/>, in GZip (.gz) format.
+	/// </summary>
+	public class GZipStream : Stream, IDisposable
+	{
+        #region Dll Imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+        private static extern IntPtr gzopen(string name, string mode);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzclose(IntPtr gzFile);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzwrite(IntPtr gzFile, int data, int length);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzread(IntPtr gzFile, int data, int length);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzgetc(IntPtr gzFile);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzputc(IntPtr gzFile, int c);
+
+        #endregion
+
+        #region Private data
+        private IntPtr _gzFile;
+        private bool _isDisposed = false;
+        private bool _isWriting;
+        #endregion
+
+        #region Constructors
+        /// <summary>
+        /// Creates a new file as a writeable GZipStream
+        /// </summary>
+        /// <param name="fileName">The name of the compressed file to create</param>
+        /// <param name="level">The compression level to use when adding data</param>
+        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
+		public GZipStream(string fileName, CompressLevel level)
+		{
+            _isWriting = true;
+            _gzFile = gzopen(fileName, String.Format("wb{0}", (int)level));
+            if (_gzFile == IntPtr.Zero)
+                throw new ZLibException(-1, "Could not open " + fileName);
+		}
+
+        /// <summary>
+        /// Opens an existing file as a readable GZipStream
+        /// </summary>
+        /// <param name="fileName">The name of the file to open</param>
+        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
+        public GZipStream(string fileName)
+        {
+            _isWriting = false;
+            _gzFile = gzopen(fileName, "rb");
+            if (_gzFile == IntPtr.Zero)
+                throw new ZLibException(-1, "Could not open " + fileName);
+
+        }
+        #endregion
+
+        #region Access properties
+        /// <summary>
+        /// Returns true of this stream can be read from, false otherwise
+        /// </summary>
+        public override bool CanRead
+        {
+            get
+            {
+                return !_isWriting;
+            }
+        }
+    
+
+        /// <summary>
+        /// Returns false.
+        /// </summary>
+        public override bool CanSeek
+        {
+            get
+            {
+                return false;
+            }
+        }
+    
+        /// <summary>
+        /// Returns true if this tsream is writeable, false otherwise
+        /// </summary>
+        public override bool CanWrite
+        {
+            get
+            {
+                return _isWriting;
+            }
+        }
+        #endregion
+    
+        #region Destructor & IDispose stuff
+
+        /// <summary>
+        /// Destroys this instance
+        /// </summary>
+        ~GZipStream()
+        {
+            cleanUp(false);
+        }
+
+        /// <summary>
+        /// Closes the external file handle
+        /// </summary>
+        public void Dispose()
+        {
+            cleanUp(true);
+        }
+
+        // Does the actual closing of the file handle.
+        private void cleanUp(bool isDisposing)
+        {
+            if (!_isDisposed)
+            {
+                gzclose(_gzFile);
+                _isDisposed = true;
+            }
+        }
+        #endregion
+    
+        #region Basic reading and writing
+        /// <summary>
+        /// Attempts to read a number of bytes from the stream.
+        /// </summary>
+        /// <param name="buffer">The destination data buffer</param>
+        /// <param name="offset">The index of the first destination byte in <c>buffer</c></param>
+        /// <param name="count">The number of bytes requested</param>
+        /// <returns>The number of bytes read</returns>
+        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
+        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
+        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
+        /// <exception cref="NotSupportedException">If this stream is not readable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            if (!CanRead) throw new NotSupportedException();
+            if (buffer == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > buffer.Length) throw new ArgumentException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+
+            GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
+            int result;
+            try
+            {
+                result = gzread(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
+                if (result < 0)
+                    throw new IOException();
+            }
+            finally
+            {
+                h.Free();
+            }
+            return result;
+        }
+
+        /// <summary>
+        /// Attempts to read a single byte from the stream.
+        /// </summary>
+        /// <returns>The byte that was read, or -1 in case of error or End-Of-File</returns>
+        public override int ReadByte()
+        {
+            if (!CanRead) throw new NotSupportedException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+            return gzgetc(_gzFile);
+        }
+
+        /// <summary>
+        /// Writes a number of bytes to the stream
+        /// </summary>
+        /// <param name="buffer"></param>
+        /// <param name="offset"></param>
+        /// <param name="count"></param>
+        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
+        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
+        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
+        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            if (!CanWrite) throw new NotSupportedException();
+            if (buffer == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > buffer.Length) throw new ArgumentException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+
+            GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
+            try
+            {
+                int result = gzwrite(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
+                if (result < 0)
+                    throw new IOException();
+            }
+            finally
+            {
+                h.Free();
+            }
+        }
+
+        /// <summary>
+        /// Writes a single byte to the stream
+        /// </summary>
+        /// <param name="value">The byte to add to the stream.</param>
+        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        public override void WriteByte(byte value)
+        {
+            if (!CanWrite) throw new NotSupportedException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+
+            int result = gzputc(_gzFile, (int)value);
+            if (result < 0)
+                throw new IOException();
+        }
+        #endregion
+
+        #region Position & length stuff
+        /// <summary>
+        /// Not supported.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override void SetLength(long value)
+        {
+            throw new NotSupportedException();
+        }
+    
+        /// <summary>
+        ///  Not suppported.
+        /// </summary>
+        /// <param name="offset"></param>
+        /// <param name="origin"></param>
+        /// <returns></returns>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Seek(long offset, SeekOrigin origin)
+        {
+            throw new NotSupportedException();
+        }
+    
+        /// <summary>
+        /// Flushes the <c>GZipStream</c>.
+        /// </summary>
+        /// <remarks>In this implementation, this method does nothing. This is because excessive
+        /// flushing may degrade the achievable compression rates.</remarks>
+        public override void Flush()
+        {
+            // left empty on purpose
+        }
+    
+        /// <summary>
+        /// Gets/sets the current position in the <c>GZipStream</c>. Not suppported.
+        /// </summary>
+        /// <remarks>In this implementation this property is not supported</remarks>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Position
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+            set
+            {
+                throw new NotSupportedException();
+            }
+        }
+    
+        /// <summary>
+        /// Gets the size of the stream. Not suppported.
+        /// </summary>
+        /// <remarks>In this implementation this property is not supported</remarks>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Length
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+        }
+        #endregion
+    }
+}
--- a/contrib/dotzlib/DotZLib/Inflater.cs
+++ b/contrib/dotzlib/DotZLib/Inflater.cs
@@ -0,0 +1,105 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+    
+    /// <summary>
+    /// Implements a data decompressor, using the inflate algorithm in the ZLib dll
+    /// </summary>
+    public class Inflater : CodecBase
+	{
+        #region Dll imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+        private static extern int inflateInit_(ref ZStream sz, string vs, int size);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int inflate(ref ZStream sz, int flush);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int inflateReset(ref ZStream sz);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int inflateEnd(ref ZStream sz);
+        #endregion
+
+        /// <summary>
+        /// Constructs an new instance of the <c>Inflater</c>
+        /// </summary>
+        public Inflater() : base()
+		{
+            int retval = inflateInit_(ref _ztream, Info.Version, Marshal.SizeOf(_ztream));
+            if (retval != 0)
+                throw new ZLibException(retval, "Could not initialize inflater");
+
+            resetOutput();
+        }
+
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        public override void Add(byte[] data, int offset, int count)
+        {
+            if (data == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+
+            int total = count;
+            int inputIndex = offset;
+            int err = 0;
+
+            while (err >= 0 && inputIndex < total)
+            {
+                copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
+                err = inflate(ref _ztream, (int)FlushTypes.None);
+                if (err == 0)
+                    while (_ztream.avail_out == 0)
+                    {
+                        OnDataAvailable();
+                        err = inflate(ref _ztream, (int)FlushTypes.None);
+                    }
+
+                inputIndex += (int)_ztream.total_in;
+            }
+            setChecksum( _ztream.adler );
+        }
+
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        public override void Finish()
+        {
+            int err;
+            do 
+            {
+                err = inflate(ref _ztream, (int)FlushTypes.Finish);
+                OnDataAvailable();
+            }
+            while (err == 0);
+            setChecksum( _ztream.adler );
+            inflateReset(ref _ztream);
+            resetOutput();
+        }
+
+        /// <summary>
+        /// Closes the internal zlib inflate stream
+        /// </summary>
+        protected override void CleanUp() { inflateEnd(ref _ztream); }
+
+
+	}
+}
--- a/contrib/dotzlib/DotZLib/UnitTests.cs
+++ b/contrib/dotzlib/DotZLib/UnitTests.cs
@@ -0,0 +1,274 @@
+//
+// <20> Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Collections;
+using System.IO;
+
+// uncomment the define below to include unit tests
+//#define nunit
+#if nunit
+using NUnit.Framework;
+
+// Unit tests for the DotZLib class library
+// ----------------------------------------
+//
+// Use this with NUnit 2 from http://www.nunit.org
+//
+
+namespace DotZLibTests
+{
+    using DotZLib;
+
+    // helper methods
+    internal class Utils
+    {
+        public static bool byteArrEqual( byte[] lhs, byte[] rhs )
+        {
+            if (lhs.Length != rhs.Length)
+                return false;
+            for (int i = lhs.Length-1; i >= 0; --i)
+                if (lhs[i] != rhs[i])
+                    return false;
+            return true;
+        }
+
+    }
+
+
+    [TestFixture]
+    public class CircBufferTests
+    {
+        #region Circular buffer tests
+        [Test]
+        public void SinglePutGet()
+        {
+            CircularBuffer buf = new CircularBuffer(10);
+            Assert.AreEqual( 0, buf.Size );
+            Assert.AreEqual( -1, buf.Get() );
+
+            Assert.IsTrue(buf.Put( 1 ));
+            Assert.AreEqual( 1, buf.Size );
+            Assert.AreEqual( 1, buf.Get() );
+            Assert.AreEqual( 0, buf.Size );
+            Assert.AreEqual( -1, buf.Get() );
+        }
+
+        [Test]
+        public void BlockPutGet()
+        {
+            CircularBuffer buf = new CircularBuffer(10);
+            byte[] arr = {1,2,3,4,5,6,7,8,9,10};
+            Assert.AreEqual( 10, buf.Put(arr,0,10) );
+            Assert.AreEqual( 10, buf.Size );
+            Assert.IsFalse( buf.Put(11) );
+            Assert.AreEqual( 1, buf.Get() );
+            Assert.IsTrue( buf.Put(11) );
+
+            byte[] arr2 = (byte[])arr.Clone();
+            Assert.AreEqual( 9, buf.Get(arr2,1,9) );
+            Assert.IsTrue( Utils.byteArrEqual(arr,arr2) );
+        }
+
+        #endregion
+    }
+
+    [TestFixture]
+    public class ChecksumTests
+    {
+        #region CRC32 Tests
+        [Test]
+        public void CRC32_Null()
+        {
+            CRC32Checksum crc32 = new CRC32Checksum();
+            Assert.AreEqual( 0, crc32.Value );
+
+            crc32 = new CRC32Checksum(1);
+            Assert.AreEqual( 1, crc32.Value );
+
+            crc32 = new CRC32Checksum(556);
+            Assert.AreEqual( 556, crc32.Value );
+        }
+
+        [Test]
+        public void CRC32_Data()
+        {
+            CRC32Checksum crc32 = new CRC32Checksum();
+            byte[] data = { 1,2,3,4,5,6,7 };
+            crc32.Update(data);
+            Assert.AreEqual( 0x70e46888, crc32.Value  );
+
+            crc32 = new CRC32Checksum();
+            crc32.Update("penguin");
+            Assert.AreEqual( 0x0e5c1a120, crc32.Value );
+
+            crc32 = new CRC32Checksum(1);
+            crc32.Update("penguin");
+            Assert.AreEqual(0x43b6aa94, crc32.Value);
+
+        }
+        #endregion
+
+        #region Adler tests
+
+        [Test]
+        public void Adler_Null()
+        {
+            AdlerChecksum adler = new AdlerChecksum();
+            Assert.AreEqual(0, adler.Value);
+
+            adler = new AdlerChecksum(1);
+            Assert.AreEqual( 1, adler.Value );
+
+            adler = new AdlerChecksum(556);
+            Assert.AreEqual( 556, adler.Value );
+        }
+
+        [Test]
+        public void Adler_Data()
+        {
+            AdlerChecksum adler = new AdlerChecksum(1);
+            byte[] data = { 1,2,3,4,5,6,7 };
+            adler.Update(data);
+            Assert.AreEqual( 0x5b001d, adler.Value  );
+
+            adler = new AdlerChecksum();
+            adler.Update("penguin");
+            Assert.AreEqual(0x0bcf02f6, adler.Value );
+
+            adler = new AdlerChecksum(1);
+            adler.Update("penguin");
+            Assert.AreEqual(0x0bd602f7, adler.Value);
+
+        }
+        #endregion
+    }
+
+    [TestFixture]
+    public class InfoTests
+    {
+        #region Info tests
+        [Test]
+        public void Info_Version()
+        {
+            Info info = new Info();
+            Assert.AreEqual("1.2.2", Info.Version);
+            Assert.AreEqual(32, info.SizeOfUInt);
+            Assert.AreEqual(32, info.SizeOfULong);
+            Assert.AreEqual(32, info.SizeOfPointer);
+            Assert.AreEqual(32, info.SizeOfOffset);
+        }
+        #endregion
+    }
+
+    [TestFixture]
+    public class DeflateInflateTests
+    {
+        #region Deflate tests
+        [Test]
+        public void Deflate_Init()
+        {
+            using (Deflater def = new Deflater(CompressLevel.Default))
+            {
+            }
+        }
+
+        private ArrayList compressedData = new ArrayList();
+        private uint adler1;
+
+        private ArrayList uncompressedData = new ArrayList();
+        private uint adler2;
+
+        public void CDataAvail(byte[] data, int startIndex, int count)
+        {
+            for (int i = 0; i < count; ++i)
+                compressedData.Add(data[i+startIndex]);
+        }
+
+        [Test]
+        public void Deflate_Compress()
+        {
+            compressedData.Clear();
+
+            byte[] testData = new byte[35000];
+            for (int i = 0; i < testData.Length; ++i)
+                testData[i] = 5;
+
+            using (Deflater def = new Deflater((CompressLevel)5))
+            {
+                def.DataAvailable += new DataAvailableHandler(CDataAvail);
+                def.Add(testData);
+                def.Finish();
+                adler1 = def.Checksum;
+            }
+        }
+        #endregion
+
+        #region Inflate tests
+        [Test]
+        public void Inflate_Init()
+        {
+            using (Inflater inf = new Inflater())
+            {
+            }
+        }
+
+        private void DDataAvail(byte[] data, int startIndex, int count)
+        {
+            for (int i = 0; i < count; ++i)
+                uncompressedData.Add(data[i+startIndex]);
+        }
+
+        [Test]
+        public void Inflate_Expand()
+        { 
+            uncompressedData.Clear();
+
+            using (Inflater inf = new Inflater())
+            {
+                inf.DataAvailable += new DataAvailableHandler(DDataAvail);
+                inf.Add((byte[])compressedData.ToArray(typeof(byte)));
+                inf.Finish();
+                adler2 = inf.Checksum;
+            }
+            Assert.AreEqual( adler1, adler2 );
+        }
+        #endregion
+    }
+
+    [TestFixture]
+    public class GZipStreamTests
+    {
+        #region GZipStream test
+        [Test]
+        public void GZipStream_WriteRead()
+        {
+            using (GZipStream gzOut = new GZipStream("gzstream.gz", CompressLevel.Best))
+            {
+                BinaryWriter writer = new BinaryWriter(gzOut);
+                writer.Write("hi there");
+                writer.Write(Math.PI);
+                writer.Write(42);
+            }
+
+            using (GZipStream gzIn = new GZipStream("gzstream.gz"))
+            {
+                BinaryReader reader = new BinaryReader(gzIn);
+                string s = reader.ReadString();
+                Assert.AreEqual("hi there",s);
+                double d = reader.ReadDouble();
+                Assert.AreEqual(Math.PI, d);
+                int i = reader.ReadInt32();
+                Assert.AreEqual(42,i);
+            }
+
+        }
+        #endregion
+	}
+}
+
+#endif
--- a/contrib/dotzlib/LICENSE_1_0.txt
+++ b/contrib/dotzlib/LICENSE_1_0.txt
@@ -0,0 +1,23 @@
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
--- a/contrib/dotzlib/readme.txt
+++ b/contrib/dotzlib/readme.txt
@@ -0,0 +1,58 @@
+This directory contains a .Net wrapper class library for the ZLib1.dll
+
+The wrapper includes support for inflating/deflating memory buffers, 
+.Net streaming wrappers for the gz streams part of zlib, and wrappers
+for the checksum parts of zlib. See DotZLib/UnitTests.cs for examples.
+
+Directory structure:
+--------------------
+
+LICENSE_1_0.txt       - License file.
+readme.txt            - This file.
+DotZLib.chm           - Class library documentation
+DotZLib.build         - NAnt build file
+DotZLib.sln           - Microsoft Visual Studio 2003 solution file
+
+DotZLib\*.cs          - Source files for the class library
+
+Unit tests:
+-----------
+The file DotZLib/UnitTests.cs contains unit tests for use with NUnit 2.1 or higher.
+To include unit tests in the build, define nunit before building.
+
+
+Build instructions:
+-------------------
+
+1. Using Visual Studio.Net 2003:
+   Open DotZLib.sln in VS.Net and build from there. Output file (DotZLib.dll)
+   will be found ./DotZLib/bin/release or ./DotZLib/bin/debug, depending on 
+   you are building the release or debug version of the library. Check 
+   DotZLib/UnitTests.cs for instructions on how to include unit tests in the
+   build.
+   
+2. Using NAnt:
+   Open a command prompt with access to the build environment and run nant
+   in the same directory as the DotZLib.build file.
+   You can define 2 properties on the nant command-line to control the build:
+   debug={true|false} to toggle between release/debug builds (default=true).
+   nunit={true|false} to include or esclude unit tests (default=true).
+   Also the target clean will remove binaries.
+   Output file (DotZLib.dll) will be found in either ./DotZLib/bin/release 
+   or ./DotZLib/bin/debug, depending on whether you are building the release 
+   or debug version of the library.
+
+   Examples: 
+     nant -D:debug=false -D:nunit=false
+       will build a release mode version of the library without unit tests.
+     nant
+       will build a debug version of the library with unit tests 
+     nant clean
+       will remove all previously built files.
+
+
+---------------------------------
+Copyright (c) Henrik Ravn 2004
+
+Use, modification and distribution are subject to the Boost Software License, Version 1.0. 
+(See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
--- a/contrib/gzappend/gzappend.c
+++ b/contrib/gzappend/gzappend.c
@@ -0,0 +1,500 @@
+/* gzappend -- command to append to a gzip file
+
+  Copyright (C) 2003 Mark Adler, all rights reserved
+  version 1.1, 4 Nov 2003
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the author be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Mark Adler    madler@alumni.caltech.edu
+ */
+
+/*
+ * Change history:
+ *
+ * 1.0  19 Oct 2003     - First version
+ * 1.1   4 Nov 2003     - Expand and clarify some comments and notes
+ *                      - Add version and copyright to help
+ *                      - Send help to stdout instead of stderr
+ *                      - Add some preemptive typecasts
+ *                      - Add L to constants in lseek() calls
+ *                      - Remove some debugging information in error messages
+ *                      - Use new data_type definition for zlib 1.2.1
+ *                      - Simplfy and unify file operations
+ *                      - Finish off gzip file in gztack()
+ *                      - Use deflatePrime() instead of adding empty blocks
+ *                      - Keep gzip file clean on appended file read errors
+ *                      - Use in-place rotate instead of auxiliary buffer
+ *                        (Why you ask?  Because it was fun to write!)
+ */
+
+/*
+   gzappend takes a gzip file and appends to it, compressing files from the
+   command line or data from stdin.  The gzip file is written to directly, to
+   avoid copying that file, in case it's large.  Note that this results in the
+   unfriendly behavior that if gzappend fails, the gzip file is corrupted.
+
+   This program was written to illustrate the use of the new Z_BLOCK option of
+   zlib 1.2.x's inflate() function.  This option returns from inflate() at each
+   block boundary to facilitate locating and modifying the last block bit at
+   the start of the final deflate block.  Also whether using Z_BLOCK or not,
+   another required feature of zlib 1.2.x is that inflate() now provides the
+   number of unusued bits in the last input byte used.  gzappend will not work
+   with versions of zlib earlier than 1.2.1.
+
+   gzappend first decompresses the gzip file internally, discarding all but
+   the last 32K of uncompressed data, and noting the location of the last block
+   bit and the number of unused bits in the last byte of the compressed data.
+   The gzip trailer containing the CRC-32 and length of the uncompressed data
+   is verified.  This trailer will be later overwritten.
+
+   Then the last block bit is cleared by seeking back in the file and rewriting
+   the byte that contains it.  Seeking forward, the last byte of the compressed
+   data is saved along with the number of unused bits to initialize deflate.
+
+   A deflate process is initialized, using the last 32K of the uncompressed
+   data from the gzip file to initialize the dictionary.  If the total
+   uncompressed data was less than 32K, then all of it is used to initialize
+   the dictionary.  The deflate output bit buffer is also initialized with the
+   last bits from the original deflate stream.  From here on, the data to
+   append is simply compressed using deflate, and written to the gzip file.
+   When that is complete, the new CRC-32 and uncompressed length are written
+   as the trailer of the gzip file.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "zlib.h"
+
+#define local static
+#define LGCHUNK 14
+#define CHUNK (1U << LGCHUNK)
+#define DSIZE 32768U
+
+/* print an error message and terminate with extreme prejudice */
+local void bye(char *msg1, char *msg2)
+{
+    fprintf(stderr, "gzappend error: %s%s\n", msg1, msg2);
+    exit(1);
+}
+
+/* return the greatest common divisor of a and b using Euclid's algorithm,
+   modified to be fast when one argument much greater than the other, and
+   coded to avoid unnecessary swapping */
+local unsigned gcd(unsigned a, unsigned b)
+{
+    unsigned c;
+
+    while (a && b)
+        if (a > b) {
+            c = b;
+            while (a - c >= c)
+                c <<= 1;
+            a -= c;
+        }
+        else {
+            c = a;
+            while (b - c >= c)
+                c <<= 1;
+            b -= c;
+        }
+    return a + b;
+}
+
+/* rotate list[0..len-1] left by rot positions, in place */
+local void rotate(unsigned char *list, unsigned len, unsigned rot)
+{
+    unsigned char tmp;
+    unsigned cycles;
+    unsigned char *start, *last, *to, *from;
+
+    /* normalize rot and handle degenerate cases */
+    if (len < 2) return;
+    if (rot >= len) rot %= len;
+    if (rot == 0) return;
+
+    /* pointer to last entry in list */
+    last = list + (len - 1);
+
+    /* do simple left shift by one */
+    if (rot == 1) {
+        tmp = *list;
+        memcpy(list, list + 1, len - 1);
+        *last = tmp;
+        return;
+    }
+
+    /* do simple right shift by one */
+    if (rot == len - 1) {
+        tmp = *last;
+        memmove(list + 1, list, len - 1);
+        *list = tmp;
+        return;
+    }
+
+    /* otherwise do rotate as a set of cycles in place */
+    cycles = gcd(len, rot);             /* number of cycles */
+    do {
+        start = from = list + cycles;   /* start index is arbitrary */
+        tmp = *from;                    /* save entry to be overwritten */
+        for (;;) {
+            to = from;                  /* next step in cycle */
+            from += rot;                /* go right rot positions */
+            if (from > last) from -= len;   /* (pointer better not wrap) */
+            if (from == start) break;   /* all but one shifted */
+            *to = *from;                /* shift left */
+        }
+        *to = tmp;                      /* complete the circle */
+    } while (--cycles);
+}
+
+/* structure for gzip file read operations */
+typedef struct {
+    int fd;                     /* file descriptor */
+    int size;                   /* 1 << size is bytes in buf */
+    unsigned left;              /* bytes available at next */
+    unsigned char *buf;         /* buffer */
+    unsigned char *next;        /* next byte in buffer */
+    char *name;                 /* file name for error messages */
+} file;
+
+/* reload buffer */
+local int readin(file *in)
+{
+    int len;
+
+    len = read(in->fd, in->buf, 1 << in->size);
+    if (len == -1) bye("error reading ", in->name);
+    in->left = (unsigned)len;
+    in->next = in->buf;
+    return len;
+}
+
+/* read from file in, exit if end-of-file */
+local int readmore(file *in)
+{
+    if (readin(in) == 0) bye("unexpected end of ", in->name);
+    return 0;
+}
+
+#define read1(in) (in->left == 0 ? readmore(in) : 0, \
+                   in->left--, *(in->next)++)
+
+/* skip over n bytes of in */
+local void skip(file *in, unsigned n)
+{
+    unsigned bypass;
+
+    if (n > in->left) {
+        n -= in->left;
+        bypass = n & ~((1U << in->size) - 1);
+        if (bypass) {
+            if (lseek(in->fd, (off_t)bypass, SEEK_CUR) == -1)
+                bye("seeking ", in->name);
+            n -= bypass;
+        }
+        readmore(in);
+        if (n > in->left)
+            bye("unexpected end of ", in->name);
+    }
+    in->left -= n;
+    in->next += n;
+}
+
+/* read a four-byte unsigned integer, little-endian, from in */
+unsigned long read4(file *in)
+{
+    unsigned long val;
+
+    val = read1(in);
+    val += (unsigned)read1(in) << 8;
+    val += (unsigned long)read1(in) << 16;
+    val += (unsigned long)read1(in) << 24;
+    return val;
+}
+
+/* skip over gzip header */
+local void gzheader(file *in)
+{
+    int flags;
+    unsigned n;
+
+    if (read1(in) != 31 || read1(in) != 139) bye(in->name, " not a gzip file");
+    if (read1(in) != 8) bye("unknown compression method in", in->name);
+    flags = read1(in);
+    if (flags & 0xe0) bye("unknown header flags set in", in->name);
+    skip(in, 6);
+    if (flags & 4) {
+        n = read1(in);
+        n += (unsigned)(read1(in)) << 8;
+        skip(in, n);
+    }
+    if (flags & 8) while (read1(in) != 0) ;
+    if (flags & 16) while (read1(in) != 0) ;
+    if (flags & 2) skip(in, 2);
+}
+
+/* decompress gzip file "name", return strm with a deflate stream ready to
+   continue compression of the data in the gzip file, and return a file
+   descriptor pointing to where to write the compressed data -- the deflate
+   stream is initialized to compress using level "level" */
+local int gzscan(char *name, z_stream *strm, int level)
+{
+    int ret, lastbit, left, full;
+    unsigned have;
+    unsigned long crc, tot;
+    unsigned char *window;
+    off_t lastoff, end;
+    file gz;
+
+    /* open gzip file */
+    gz.name = name;
+    gz.fd = open(name, O_RDWR, 0);
+    if (gz.fd == -1) bye("cannot open ", name);
+    gz.buf = malloc(CHUNK);
+    if (gz.buf == NULL) bye("out of memory", "");
+    gz.size = LGCHUNK;
+    gz.left = 0;
+
+    /* skip gzip header */
+    gzheader(&gz);
+
+    /* prepare to decompress */
+    window = malloc(DSIZE);
+    if (window == NULL) bye("out of memory", "");
+    strm->zalloc = Z_NULL;
+    strm->zfree = Z_NULL;
+    strm->opaque = Z_NULL;
+    ret = inflateInit2(strm, -15);
+    if (ret != Z_OK) bye("out of memory", " or library mismatch");
+
+    /* decompress the deflate stream, saving append information */
+    lastbit = 0;
+    lastoff = lseek(gz.fd, 0L, SEEK_CUR) - gz.left;
+    left = 0;
+    strm->avail_in = gz.left;
+    strm->next_in = gz.next;
+    crc = crc32(0L, Z_NULL, 0);
+    have = full = 0;
+    do {
+        /* if needed, get more input */
+        if (strm->avail_in == 0) {
+            readmore(&gz);
+            strm->avail_in = gz.left;
+            strm->next_in = gz.next;
+        }
+
+        /* set up output to next available section of sliding window */
+        strm->avail_out = DSIZE - have;
+        strm->next_out = window + have;
+
+        /* inflate and check for errors */
+        ret = inflate(strm, Z_BLOCK);
+        if (ret == Z_STREAM_ERROR) bye("internal stream error!", "");
+        if (ret == Z_MEM_ERROR) bye("out of memory", "");
+        if (ret == Z_DATA_ERROR)
+            bye("invalid compressed data--format violated in", name);
+
+        /* update crc and sliding window pointer */
+        crc = crc32(crc, window + have, DSIZE - have - strm->avail_out);
+        if (strm->avail_out)
+            have = DSIZE - strm->avail_out;
+        else {
+            have = 0;
+            full = 1;
+        }
+
+        /* process end of block */
+        if (strm->data_type & 128) {
+            if (strm->data_type & 64)
+                left = strm->data_type & 0x1f;
+            else {
+                lastbit = strm->data_type & 0x1f;
+                lastoff = lseek(gz.fd, 0L, SEEK_CUR) - strm->avail_in;
+            }
+        }
+    } while (ret != Z_STREAM_END);
+    inflateEnd(strm);
+    gz.left = strm->avail_in;
+    gz.next = strm->next_in;
+
+    /* save the location of the end of the compressed data */
+    end = lseek(gz.fd, 0L, SEEK_CUR) - gz.left;
+
+    /* check gzip trailer and save total for deflate */
+    if (crc != read4(&gz))
+        bye("invalid compressed data--crc mismatch in ", name);
+    tot = strm->total_out;
+    if ((tot & 0xffffffffUL) != read4(&gz))
+        bye("invalid compressed data--length mismatch in", name);
+
+    /* if not at end of file, warn */
+    if (gz.left || readin(&gz))
+        fprintf(stderr,
+            "gzappend warning: junk at end of gzip file overwritten\n");
+
+    /* clear last block bit */
+    lseek(gz.fd, lastoff - (lastbit != 0), SEEK_SET);
+    if (read(gz.fd, gz.buf, 1) != 1) bye("reading after seek on ", name);
+    *gz.buf = (unsigned char)(*gz.buf ^ (1 << ((8 - lastbit) & 7)));
+    lseek(gz.fd, -1L, SEEK_CUR);
+    if (write(gz.fd, gz.buf, 1) != 1) bye("writing after seek to ", name);
+
+    /* if window wrapped, build dictionary from window by rotating */
+    if (full) {
+        rotate(window, DSIZE, have);
+        have = DSIZE;
+    }
+
+    /* set up deflate stream with window, crc, total_in, and leftover bits */
+    ret = deflateInit2(strm, level, Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY);
+    if (ret != Z_OK) bye("out of memory", "");
+    deflateSetDictionary(strm, window, have);
+    strm->adler = crc;
+    strm->total_in = tot;
+    if (left) {
+        lseek(gz.fd, --end, SEEK_SET);
+        if (read(gz.fd, gz.buf, 1) != 1) bye("reading after seek on ", name);
+        deflatePrime(strm, 8 - left, *gz.buf);
+    }
+    lseek(gz.fd, end, SEEK_SET);
+
+    /* clean up and return */
+    free(window);
+    free(gz.buf);
+    return gz.fd;
+}
+
+/* append file "name" to gzip file gd using deflate stream strm -- if last
+   is true, then finish off the deflate stream at the end */
+local void gztack(char *name, int gd, z_stream *strm, int last)
+{
+    int fd, len, ret;
+    unsigned left;
+    unsigned char *in, *out;
+
+    /* open file to compress and append */
+    fd = 0;
+    if (name != NULL) {
+        fd = open(name, O_RDONLY, 0);
+        if (fd == -1)
+            fprintf(stderr, "gzappend warning: %s not found, skipping ...\n",
+                    name);
+    }
+
+    /* allocate buffers */
+    in = fd == -1 ? NULL : malloc(CHUNK);
+    out = malloc(CHUNK);
+    if (out == NULL) bye("out of memory", "");
+
+    /* compress input file and append to gzip file */
+    do {
+        /* get more input */
+        len = fd == -1 ? 0 : read(fd, in, CHUNK);
+        if (len == -1) {
+            fprintf(stderr,
+                    "gzappend warning: error reading %s, skipping rest ...\n",
+                    name);
+            len = 0;
+        }
+        strm->avail_in = (unsigned)len;
+        strm->next_in = in;
+        if (len) strm->adler = crc32(strm->adler, in, (unsigned)len);
+
+        /* compress and write all available output */
+        do {
+            strm->avail_out = CHUNK;
+            strm->next_out = out;
+            ret = deflate(strm, last && len == 0 ? Z_FINISH : Z_NO_FLUSH);
+            left = CHUNK - strm->avail_out;
+            while (left) {
+                len = write(gd, out + CHUNK - strm->avail_out - left, left);
+                if (len == -1) bye("writing gzip file", "");
+                left -= (unsigned)len;
+            }
+        } while (strm->avail_out == 0 && ret != Z_STREAM_END);
+    } while (len != 0);
+
+    /* write trailer after last entry */
+    if (last) {
+        deflateEnd(strm);
+        out[0] = (unsigned char)(strm->adler);
+        out[1] = (unsigned char)(strm->adler >> 8);
+        out[2] = (unsigned char)(strm->adler >> 16);
+        out[3] = (unsigned char)(strm->adler >> 24);
+        out[4] = (unsigned char)(strm->total_in);
+        out[5] = (unsigned char)(strm->total_in >> 8);
+        out[6] = (unsigned char)(strm->total_in >> 16);
+        out[7] = (unsigned char)(strm->total_in >> 24);
+        len = 8;
+        do {
+            ret = write(gd, out + 8 - len, len);
+            if (ret == -1) bye("writing gzip file", "");
+            len -= ret;
+        } while (len);
+        close(gd);
+    }
+
+    /* clean up and return */
+    free(out);
+    if (in != NULL) free(in);
+    if (fd > 0) close(fd);
+}
+
+/* process the compression level option if present, scan the gzip file, and
+   append the specified files, or append the data from stdin if no other file
+   names are provided on the command line -- the gzip file must be writable
+   and seekable */
+int main(int argc, char **argv)
+{
+    int gd, level;
+    z_stream strm;
+
+    /* ignore command name */
+    argv++;
+
+    /* provide usage if no arguments */
+    if (*argv == NULL) {
+        printf("gzappend 1.1 (4 Nov 2003) Copyright (C) 2003 Mark Adler\n");
+        printf(
+            "usage: gzappend [-level] file.gz [ addthis [ andthis ... ]]\n");
+        return 0;
+    }
+
+    /* set compression level */
+    level = Z_DEFAULT_COMPRESSION;
+    if (argv[0][0] == '-') {
+        if (argv[0][1] < '0' || argv[0][1] > '9' || argv[0][2] != 0)
+            bye("invalid compression level", "");
+        level = argv[0][1] - '0';
+        if (*++argv == NULL) bye("no gzip file name after options", "");
+    }
+
+    /* prepare to append to gzip file */
+    gd = gzscan(*argv++, &strm, level);
+
+    /* append files on command line, or from stdin if none */
+    if (*argv == NULL)
+        gztack(NULL, gd, &strm, 1);
+    else
+        do {
+            gztack(*argv, gd, &strm, argv[1] == NULL);
+        } while (*++argv != NULL);
+    return 0;
+}
--- a/contrib/infback9/infback9.c
+++ b/contrib/infback9/infback9.c
@@ -0,0 +1,608 @@
+/* infback9.c -- inflate deflate64 data using a call-back interface
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zutil.h"
+#include "infback9.h"
+#include "inftree9.h"
+#include "inflate9.h"
+
+#define WSIZE 65536UL
+
+/*
+   strm provides memory allocation functions in zalloc and zfree, or
+   Z_NULL to use the library memory allocation functions.
+
+   window is a user-supplied window and output buffer that is 64K bytes.
+ */
+int ZEXPORT inflateBack9Init_(strm, window, version, stream_size)
+z_stream FAR *strm;
+unsigned char FAR *window;
+const char *version;
+int stream_size;
+{
+    struct inflate_state FAR *state;
+
+    if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+        stream_size != (int)(sizeof(z_stream)))
+        return Z_VERSION_ERROR;
+    if (strm == Z_NULL || window == Z_NULL)
+        return Z_STREAM_ERROR;
+    strm->msg = Z_NULL;                 /* in case we return an error */
+    if (strm->zalloc == (alloc_func)0) {
+        strm->zalloc = zcalloc;
+        strm->opaque = (voidpf)0;
+    }
+    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+    state = (struct inflate_state FAR *)ZALLOC(strm, 1,
+                                               sizeof(struct inflate_state));
+    if (state == Z_NULL) return Z_MEM_ERROR;
+    Tracev((stderr, "inflate: allocated\n"));
+    strm->state = (voidpf)state;
+    state->window = window;
+    return Z_OK;
+}
+
+/*
+   Build and output length and distance decoding tables for fixed code
+   decoding.
+ */
+#ifdef MAKEFIXED
+#include <stdio.h>
+
+void makefixed9(void)
+{
+    unsigned sym, bits, low, size;
+    code *next, *lenfix, *distfix;
+    struct inflate_state state;
+    code fixed[544];
+
+    /* literal/length table */
+    sym = 0;
+    while (sym < 144) state.lens[sym++] = 8;
+    while (sym < 256) state.lens[sym++] = 9;
+    while (sym < 280) state.lens[sym++] = 7;
+    while (sym < 288) state.lens[sym++] = 8;
+    next = fixed;
+    lenfix = next;
+    bits = 9;
+    inflate_table9(LENS, state.lens, 288, &(next), &(bits), state.work);
+
+    /* distance table */
+    sym = 0;
+    while (sym < 32) state.lens[sym++] = 5;
+    distfix = next;
+    bits = 5;
+    inflate_table9(DISTS, state.lens, 32, &(next), &(bits), state.work);
+
+    /* write tables */
+    puts("    /* inffix9.h -- table for decoding deflate64 fixed codes");
+    puts("     * Generated automatically by makefixed9().");
+    puts("     */");
+    puts("");
+    puts("    /* WARNING: this file should *not* be used by applications.");
+    puts("       It is part of the implementation of this library and is");
+    puts("       subject to change. Applications should only use zlib.h.");
+    puts("     */");
+    puts("");
+    size = 1U << 9;
+    printf("    static const code lenfix[%u] = {", size);
+    low = 0;
+    for (;;) {
+        if ((low % 6) == 0) printf("\n        ");
+        printf("{%u,%u,%d}", lenfix[low].op, lenfix[low].bits,
+               lenfix[low].val);
+        if (++low == size) break;
+        putchar(',');
+    }
+    puts("\n    };");
+    size = 1U << 5;
+    printf("\n    static const code distfix[%u] = {", size);
+    low = 0;
+    for (;;) {
+        if ((low % 5) == 0) printf("\n        ");
+        printf("{%u,%u,%d}", distfix[low].op, distfix[low].bits,
+               distfix[low].val);
+        if (++low == size) break;
+        putchar(',');
+    }
+    puts("\n    };");
+}
+#endif /* MAKEFIXED */
+
+/* Macros for inflateBack(): */
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+    do { \
+        hold = 0; \
+        bits = 0; \
+    } while (0)
+
+/* Assure that some input is available.  If input is requested, but denied,
+   then return a Z_BUF_ERROR from inflateBack(). */
+#define PULL() \
+    do { \
+        if (have == 0) { \
+            have = in(in_desc, &next); \
+            if (have == 0) { \
+                next = Z_NULL; \
+                ret = Z_BUF_ERROR; \
+                goto inf_leave; \
+            } \
+        } \
+    } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflateBack()
+   with an error if there is no input available. */
+#define PULLBYTE() \
+    do { \
+        PULL(); \
+        have--; \
+        hold += (unsigned long)(*next++) << bits; \
+        bits += 8; \
+    } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator.  If there is
+   not enough available input to do that, then return from inflateBack() with
+   an error. */
+#define NEEDBITS(n) \
+    do { \
+        while (bits < (unsigned)(n)) \
+            PULLBYTE(); \
+    } while (0)
+
+/* Return the low n bits of the bit accumulator (n <= 16) */
+#define BITS(n) \
+    ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+    do { \
+        hold >>= (n); \
+        bits -= (unsigned)(n); \
+    } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+    do { \
+        hold >>= bits & 7; \
+        bits -= bits & 7; \
+    } while (0)
+
+/* Assure that some output space is available, by writing out the window
+   if it's full.  If the write fails, return from inflateBack() with a
+   Z_BUF_ERROR. */
+#define ROOM() \
+    do { \
+        if (left == 0) { \
+            put = window; \
+            left = WSIZE; \
+            wrap = 1; \
+            if (out(out_desc, put, (unsigned)left)) { \
+                ret = Z_BUF_ERROR; \
+                goto inf_leave; \
+            } \
+        } \
+    } while (0)
+
+/*
+   strm provides the memory allocation functions and window buffer on input,
+   and provides information on the unused input on return.  For Z_DATA_ERROR
+   returns, strm will also provide an error message.
+
+   in() and out() are the call-back input and output functions.  When
+   inflateBack() needs more input, it calls in().  When inflateBack() has
+   filled the window with output, or when it completes with data in the
+   window, it calls out() to write out the data.  The application must not
+   change the provided input until in() is called again or inflateBack()
+   returns.  The application must not change the window/output buffer until
+   inflateBack() returns.
+
+   in() and out() are called with a descriptor parameter provided in the
+   inflateBack() call.  This parameter can be a structure that provides the
+   information required to do the read or write, as well as accumulated
+   information on the input and output such as totals and check values.
+
+   in() should return zero on failure.  out() should return non-zero on
+   failure.  If either in() or out() fails, than inflateBack() returns a
+   Z_BUF_ERROR.  strm->next_in can be checked for Z_NULL to see whether it
+   was in() or out() that caused in the error.  Otherwise,  inflateBack()
+   returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
+   error, or Z_MEM_ERROR if it could not allocate memory for the state.
+   inflateBack() can also return Z_STREAM_ERROR if the input parameters
+   are not correct, i.e. strm is Z_NULL or the state was not initialized.
+ */
+int ZEXPORT inflateBack9(strm, in, in_desc, out, out_desc)
+z_stream FAR *strm;
+in_func in;
+void FAR *in_desc;
+out_func out;
+void FAR *out_desc;
+{
+    struct inflate_state FAR *state;
+    unsigned char FAR *next;    /* next input */
+    unsigned char FAR *put;     /* next output */
+    unsigned have;              /* available input */
+    unsigned long left;         /* available output */
+    inflate_mode mode;          /* current inflate mode */
+    int lastblock;              /* true if processing last block */
+    int wrap;                   /* true if the window has wrapped */
+    unsigned long write;        /* window write index */
+    unsigned char FAR *window;  /* allocated sliding window, if needed */
+    unsigned long hold;         /* bit buffer */
+    unsigned bits;              /* bits in bit buffer */
+    unsigned extra;             /* extra bits needed */
+    unsigned long length;       /* literal or length of data to copy */
+    unsigned long offset;       /* distance back to copy string from */
+    unsigned long copy;         /* number of stored or match bytes to copy */
+    unsigned char FAR *from;    /* where to copy match bytes from */
+    code const FAR *lencode;    /* starting table for length/literal codes */
+    code const FAR *distcode;   /* starting table for distance codes */
+    unsigned lenbits;           /* index bits for lencode */
+    unsigned distbits;          /* index bits for distcode */
+    code this;                  /* current decoding table entry */
+    code last;                  /* parent table entry */
+    unsigned len;               /* length to copy for repeats, bits to drop */
+    int ret;                    /* return code */
+    static const unsigned short order[19] = /* permutation of code lengths */
+        {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+#include "inffix9.h"
+
+    /* Check that the strm exists and that the state was initialized */
+    if (strm == Z_NULL || strm->state == Z_NULL)
+        return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+
+    /* Reset the state */
+    strm->msg = Z_NULL;
+    mode = TYPE;
+    lastblock = 0;
+    write = 0;
+    wrap = 0;
+    window = state->window;
+    next = strm->next_in;
+    have = next != Z_NULL ? strm->avail_in : 0;
+    hold = 0;
+    bits = 0;
+    put = window;
+    left = WSIZE;
+    lencode = Z_NULL;
+    distcode = Z_NULL;
+
+    /* Inflate until end of block marked as last */
+    for (;;)
+        switch (mode) {
+        case TYPE:
+            /* determine and dispatch block type */
+            if (lastblock) {
+                BYTEBITS();
+                mode = DONE;
+                break;
+            }
+            NEEDBITS(3);
+            lastblock = BITS(1);
+            DROPBITS(1);
+            switch (BITS(2)) {
+            case 0:                             /* stored block */
+                Tracev((stderr, "inflate:     stored block%s\n",
+                        lastblock ? " (last)" : ""));
+                mode = STORED;
+                break;
+            case 1:                             /* fixed block */
+                lencode = lenfix;
+                lenbits = 9;
+                distcode = distfix;
+                distbits = 5;
+                Tracev((stderr, "inflate:     fixed codes block%s\n",
+                        lastblock ? " (last)" : ""));
+                mode = LEN;                     /* decode codes */
+                break;
+            case 2:                             /* dynamic block */
+                Tracev((stderr, "inflate:     dynamic codes block%s\n",
+                        lastblock ? " (last)" : ""));
+                mode = TABLE;
+                break;
+            case 3:
+                strm->msg = (char *)"invalid block type";
+                mode = BAD;
+            }
+            DROPBITS(2);
+            break;
+
+        case STORED:
+            /* get and verify stored block length */
+            BYTEBITS();                         /* go to byte boundary */
+            NEEDBITS(32);
+            if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
+                strm->msg = (char *)"invalid stored block lengths";
+                mode = BAD;
+                break;
+            }
+            length = (unsigned)hold & 0xffff;
+            Tracev((stderr, "inflate:       stored length %lu\n",
+                    length));
+            INITBITS();
+
+            /* copy stored block from input to output */
+            while (length != 0) {
+                copy = length;
+                PULL();
+                ROOM();
+                if (copy > have) copy = have;
+                if (copy > left) copy = left;
+                zmemcpy(put, next, copy);
+                have -= copy;
+                next += copy;
+                left -= copy;
+                put += copy;
+                length -= copy;
+            }
+            Tracev((stderr, "inflate:       stored end\n"));
+            mode = TYPE;
+            break;
+
+        case TABLE:
+            /* get dynamic table entries descriptor */
+            NEEDBITS(14);
+            state->nlen = BITS(5) + 257;
+            DROPBITS(5);
+            state->ndist = BITS(5) + 1;
+            DROPBITS(5);
+            state->ncode = BITS(4) + 4;
+            DROPBITS(4);
+            if (state->nlen > 286) {
+                strm->msg = (char *)"too many length symbols";
+                mode = BAD;
+                break;
+            }
+            Tracev((stderr, "inflate:       table sizes ok\n"));
+
+            /* get code length code lengths (not a typo) */
+            state->have = 0;
+            while (state->have < state->ncode) {
+                NEEDBITS(3);
+                state->lens[order[state->have++]] = (unsigned short)BITS(3);
+                DROPBITS(3);
+            }
+            while (state->have < 19)
+                state->lens[order[state->have++]] = 0;
+            state->next = state->codes;
+            lencode = (code const FAR *)(state->next);
+            lenbits = 7;
+            ret = inflate_table9(CODES, state->lens, 19, &(state->next),
+                                &(lenbits), state->work);
+            if (ret) {
+                strm->msg = (char *)"invalid code lengths set";
+                mode = BAD;
+                break;
+            }
+            Tracev((stderr, "inflate:       code lengths ok\n"));
+
+            /* get length and distance code code lengths */
+            state->have = 0;
+            while (state->have < state->nlen + state->ndist) {
+                for (;;) {
+                    this = lencode[BITS(lenbits)];
+                    if ((unsigned)(this.bits) <= bits) break;
+                    PULLBYTE();
+                }
+                if (this.val < 16) {
+                    NEEDBITS(this.bits);
+                    DROPBITS(this.bits);
+                    state->lens[state->have++] = this.val;
+                }
+                else {
+                    if (this.val == 16) {
+                        NEEDBITS(this.bits + 2);
+                        DROPBITS(this.bits);
+                        if (state->have == 0) {
+                            strm->msg = (char *)"invalid bit length repeat";
+                            mode = BAD;
+                            break;
+                        }
+                        len = (unsigned)(state->lens[state->have - 1]);
+                        copy = 3 + BITS(2);
+                        DROPBITS(2);
+                    }
+                    else if (this.val == 17) {
+                        NEEDBITS(this.bits + 3);
+                        DROPBITS(this.bits);
+                        len = 0;
+                        copy = 3 + BITS(3);
+                        DROPBITS(3);
+                    }
+                    else {
+                        NEEDBITS(this.bits + 7);
+                        DROPBITS(this.bits);
+                        len = 0;
+                        copy = 11 + BITS(7);
+                        DROPBITS(7);
+                    }
+                    if (state->have + copy > state->nlen + state->ndist) {
+                        strm->msg = (char *)"invalid bit length repeat";
+                        mode = BAD;
+                        break;
+                    }
+                    while (copy--)
+                        state->lens[state->have++] = (unsigned short)len;
+                }
+            }
+
+            /* handle error breaks in while */
+            if (mode == BAD) break;
+
+            /* build code tables */
+            state->next = state->codes;
+            lencode = (code const FAR *)(state->next);
+            lenbits = 9;
+            ret = inflate_table9(LENS, state->lens, state->nlen,
+                            &(state->next), &(lenbits), state->work);
+            if (ret) {
+                strm->msg = (char *)"invalid literal/lengths set";
+                mode = BAD;
+                break;
+            }
+            distcode = (code const FAR *)(state->next);
+            distbits = 6;
+            ret = inflate_table9(DISTS, state->lens + state->nlen,
+                            state->ndist, &(state->next), &(distbits),
+                            state->work);
+            if (ret) {
+                strm->msg = (char *)"invalid distances set";
+                mode = BAD;
+                break;
+            }
+            Tracev((stderr, "inflate:       codes ok\n"));
+            mode = LEN;
+
+        case LEN:
+            /* get a literal, length, or end-of-block code */
+            for (;;) {
+                this = lencode[BITS(lenbits)];
+                if ((unsigned)(this.bits) <= bits) break;
+                PULLBYTE();
+            }
+            if (this.op && (this.op & 0xf0) == 0) {
+                last = this;
+                for (;;) {
+                    this = lencode[last.val +
+                            (BITS(last.bits + last.op) >> last.bits)];
+                    if ((unsigned)(last.bits + this.bits) <= bits) break;
+                    PULLBYTE();
+                }
+                DROPBITS(last.bits);
+            }
+            DROPBITS(this.bits);
+            length = (unsigned)this.val;
+
+            /* process literal */
+            if (this.op == 0) {
+                Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+                        "inflate:         literal '%c'\n" :
+                        "inflate:         literal 0x%02x\n", this.val));
+                ROOM();
+                *put++ = (unsigned char)(length);
+                left--;
+                mode = LEN;
+                break;
+            }
+
+            /* process end of block */
+            if (this.op & 32) {
+                Tracevv((stderr, "inflate:         end of block\n"));
+                mode = TYPE;
+                break;
+            }
+
+            /* invalid code */
+            if (this.op & 64) {
+                strm->msg = (char *)"invalid literal/length code";
+                mode = BAD;
+                break;
+            }
+
+            /* length code -- get extra bits, if any */
+            extra = (unsigned)(this.op) & 31;
+            if (extra != 0) {
+                NEEDBITS(extra);
+                length += BITS(extra);
+                DROPBITS(extra);
+            }
+            Tracevv((stderr, "inflate:         length %lu\n", length));
+
+            /* get distance code */
+            for (;;) {
+                this = distcode[BITS(distbits)];
+                if ((unsigned)(this.bits) <= bits) break;
+                PULLBYTE();
+            }
+            if ((this.op & 0xf0) == 0) {
+                last = this;
+                for (;;) {
+                    this = distcode[last.val +
+                            (BITS(last.bits + last.op) >> last.bits)];
+                    if ((unsigned)(last.bits + this.bits) <= bits) break;
+                    PULLBYTE();
+                }
+                DROPBITS(last.bits);
+            }
+            DROPBITS(this.bits);
+            if (this.op & 64) {
+                strm->msg = (char *)"invalid distance code";
+                mode = BAD;
+                break;
+            }
+            offset = (unsigned)this.val;
+
+            /* get distance extra bits, if any */
+            extra = (unsigned)(this.op) & 15;
+            if (extra != 0) {
+                NEEDBITS(extra);
+                offset += BITS(extra);
+                DROPBITS(extra);
+            }
+            if (offset > WSIZE - (wrap ? 0: left)) {
+                strm->msg = (char *)"invalid distance too far back";
+                mode = BAD;
+                break;
+            }
+            Tracevv((stderr, "inflate:         distance %lu\n", offset));
+
+            /* copy match from window to output */
+            do {
+                ROOM();
+                copy = WSIZE - offset;
+                if (copy < left) {
+                    from = put + copy;
+                    copy = left - copy;
+                }
+                else {
+                    from = put - offset;
+                    copy = left;
+                }
+                if (copy > length) copy = length;
+                length -= copy;
+                left -= copy;
+                do {
+                    *put++ = *from++;
+                } while (--copy);
+            } while (length != 0);
+            break;
+
+        case DONE:
+            /* inflate stream terminated properly -- write leftover output */
+            ret = Z_STREAM_END;
+            if (left < WSIZE) {
+                if (out(out_desc, window, (unsigned)(WSIZE - left)))
+                    ret = Z_BUF_ERROR;
+            }
+            goto inf_leave;
+
+        case BAD:
+            ret = Z_DATA_ERROR;
+            goto inf_leave;
+
+        default:                /* can't happen, but makes compilers happy */
+            ret = Z_STREAM_ERROR;
+            goto inf_leave;
+        }
+
+    /* Return unused input */
+  inf_leave:
+    strm->next_in = next;
+    strm->avail_in = have;
+    return ret;
+}
+
+int ZEXPORT inflateBack9End(strm)
+z_stream FAR *strm;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+        return Z_STREAM_ERROR;
+    ZFREE(strm, strm->state);
+    strm->state = Z_NULL;
+    Tracev((stderr, "inflate: end\n"));
+    return Z_OK;
+}
--- a/contrib/infback9/infback9.diff
+++ b/contrib/infback9/infback9.diff
@@ -1,427 +0,0 @@
-*** infback.c	Mon Aug 11 16:48:06 2003
--- infback9.c	Mon Sep  8 21:22:46 2003
-***************
-*** 1,19 ****
-! /* infback.c -- inflate using a call-back interface
-   * Copyright (C) 1995-2003 Mark Adler
-   * For conditions of distribution and use, see copyright notice in zlib.h
-   */
-  
- /*
-    This code is largely copied from inflate.c.  Normally either infback.o or
-    inflate.o would be linked into an application--not both.  The interface
-    with inffast.c is retained so that optimized assembler-coded versions of
-    inflate_fast() can be used with either inflate.c or infback.c.
-  */
- 
-  #include "zutil.h"
-! #include "inftrees.h"
-  #include "inflate.h"
- #include "inffast.h"
-  
-  /* function prototypes */
-  local void fixedtables OF((struct inflate_state FAR *state));
--- 1,12 ----
-! /* infback9.c -- inflate deflate64 data using a call-back interface
-   * Copyright (C) 1995-2003 Mark Adler
-   * For conditions of distribution and use, see copyright notice in zlib.h
-   */
-  
-  #include "zutil.h"
-! #include "infback9.h"
-! #include "inftree9.h"
-  #include "inflate.h"
-  
-  /* function prototypes */
-  local void fixedtables OF((struct inflate_state FAR *state));
-***************
-*** 22,33 ****
-     strm provides memory allocation functions in zalloc and zfree, or
-     Z_NULL to use the library memory allocation functions.
-  
-!    windowBits is in the range 8..15, and window is a user-supplied
-!    window and output buffer that is 2**windowBits bytes.
-   */
-! int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
-  z_stream FAR *strm;
- int windowBits;
-  unsigned char FAR *window;
-  const char *version;
-  int stream_size;
--- 15,24 ----
-     strm provides memory allocation functions in zalloc and zfree, or
-     Z_NULL to use the library memory allocation functions.
-  
-!    window is a user-supplied window and output buffer that is 64K bytes.
-   */
-! int ZEXPORT inflateBack9Init_(strm, window, version, stream_size)
-  z_stream FAR *strm;
-  unsigned char FAR *window;
-  const char *version;
-  int stream_size;
-***************
-*** 37,44 ****
-      if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
-          stream_size != (int)(sizeof(z_stream)))
-          return Z_VERSION_ERROR;
-!     if (strm == Z_NULL || window == Z_NULL ||
-!         windowBits < 8 || windowBits > 15)
-          return Z_STREAM_ERROR;
-      strm->msg = Z_NULL;                 /* in case we return an error */
-      if (strm->zalloc == (alloc_func)0) {
--- 28,34 ----
-      if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
-          stream_size != (int)(sizeof(z_stream)))
-          return Z_VERSION_ERROR;
-!     if (strm == Z_NULL || window == Z_NULL)
-          return Z_STREAM_ERROR;
-      strm->msg = Z_NULL;                 /* in case we return an error */
-      if (strm->zalloc == (alloc_func)0) {
-***************
-*** 51,58 ****
-      if (state == Z_NULL) return Z_MEM_ERROR;
-      Tracev((stderr, "inflate: allocated\n"));
-      strm->state = (voidpf)state;
-!     state->wbits = windowBits;
-!     state->wsize = 1U << windowBits;
-      state->window = window;
-      state->write = 0;
-      state->whave = 0;
--- 41,48 ----
-      if (state == Z_NULL) return Z_MEM_ERROR;
-      Tracev((stderr, "inflate: allocated\n"));
-      strm->state = (voidpf)state;
-!     state->wbits = 16;
-!     state->wsize = 1U << 16;
-      state->window = window;
-      state->write = 0;
-      state->whave = 0;
-***************
-*** 91,110 ****
-          next = fixed;
-          lenfix = next;
-          bits = 9;
-!         inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
-  
-          /* distance table */
-          sym = 0;
-          while (sym < 32) state->lens[sym++] = 5;
-          distfix = next;
-          bits = 5;
-!         inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
-  
-          /* do this just once */
-          virgin = 0;
-      }
-  #else /* !BUILDFIXED */
-! #   include "inffixed.h"
-  #endif /* BUILDFIXED */
-      state->lencode = lenfix;
-      state->lenbits = 9;
--- 81,100 ----
-          next = fixed;
-          lenfix = next;
-          bits = 9;
-!         inflate_table9(LENS, state->lens, 288, &(next), &(bits), state->work);
-  
-          /* distance table */
-          sym = 0;
-          while (sym < 32) state->lens[sym++] = 5;
-          distfix = next;
-          bits = 5;
-!         inflate_table9(DISTS, state->lens, 32, &(next), &(bits), state->work);
-  
-          /* do this just once */
-          virgin = 0;
-      }
-  #else /* !BUILDFIXED */
-! #   include "inffix9.h"
-  #endif /* BUILDFIXED */
-      state->lencode = lenfix;
-      state->lenbits = 9;
-***************
-*** 114,141 ****
-  
-  /* Macros for inflateBack(): */
-  
- /* Load returned state from inflate_fast() */
- #define LOAD() \
-     do { \
-         put = strm->next_out; \
-         left = strm->avail_out; \
-         next = strm->next_in; \
-         have = strm->avail_in; \
-         hold = state->hold; \
-         bits = state->bits; \
-     } while (0)
- 
- /* Set state from registers for inflate_fast() */
- #define RESTORE() \
-     do { \
-         strm->next_out = put; \
-         strm->avail_out = left; \
-         strm->next_in = next; \
-         strm->avail_in = have; \
-         state->hold = hold; \
-         state->bits = bits; \
-     } while (0)
- 
-  /* Clear the input bit accumulator */
-  #define INITBITS() \
-      do { \
--- 104,109 ----
-***************
-*** 237,243 ****
-     inflateBack() can also return Z_STREAM_ERROR if the input parameters
-     are not correct, i.e. strm is Z_NULL or the state was not initialized.
-   */
-! int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
-  z_stream FAR *strm;
-  in_func in;
-  void FAR *in_desc;
--- 205,211 ----
-     inflateBack() can also return Z_STREAM_ERROR if the input parameters
-     are not correct, i.e. strm is Z_NULL or the state was not initialized.
-   */
-! int ZEXPORT inflateBack9(strm, in, in_desc, out, out_desc)
-  z_stream FAR *strm;
-  in_func in;
-  void FAR *in_desc;
-***************
-*** 354,366 ****
-              DROPBITS(5);
-              state->ncode = BITS(4) + 4;
-              DROPBITS(4);
-! #ifndef PKZIP_BUG_WORKAROUND
-!             if (state->nlen > 286 || state->ndist > 30) {
-!                 strm->msg = (char *)"too many length or distance symbols";
-                  state->mode = BAD;
-                  break;
-              }
- #endif
-              Tracev((stderr, "inflate:       table sizes ok\n"));
-  
-              /* get code length code lengths (not a typo) */
--- 322,332 ----
-              DROPBITS(5);
-              state->ncode = BITS(4) + 4;
-              DROPBITS(4);
-!             if (state->nlen > 286) {
-!                 strm->msg = (char *)"too many length symbols";
-                  state->mode = BAD;
-                  break;
-              }
-              Tracev((stderr, "inflate:       table sizes ok\n"));
-  
-              /* get code length code lengths (not a typo) */
-***************
-*** 375,381 ****
-              state->next = state->codes;
-              state->lencode = (code const FAR *)(state->next);
-              state->lenbits = 7;
-!             ret = inflate_table(CODES, state->lens, 19, &(state->next),
-                                  &(state->lenbits), state->work);
-              if (ret) {
-                  strm->msg = (char *)"invalid code lengths set";
--- 341,347 ----
-              state->next = state->codes;
-              state->lencode = (code const FAR *)(state->next);
-              state->lenbits = 7;
-!             ret = inflate_table9(CODES, state->lens, 19, &(state->next),
-                                  &(state->lenbits), state->work);
-              if (ret) {
-                  strm->msg = (char *)"invalid code lengths set";
-***************
-*** 438,445 ****
-              state->next = state->codes;
-              state->lencode = (code const FAR *)(state->next);
-              state->lenbits = 9;
-!             ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
-!                                 &(state->lenbits), state->work);
-              if (ret) {
-                  strm->msg = (char *)"invalid literal/lengths set";
-                  state->mode = BAD;
--- 404,411 ----
-              state->next = state->codes;
-              state->lencode = (code const FAR *)(state->next);
-              state->lenbits = 9;
-!             ret = inflate_table9(LENS, state->lens, state->nlen,
-!                             &(state->next), &(state->lenbits), state->work);
-              if (ret) {
-                  strm->msg = (char *)"invalid literal/lengths set";
-                  state->mode = BAD;
-***************
-*** 447,454 ****
-              }
-              state->distcode = (code const FAR *)(state->next);
-              state->distbits = 6;
-!             ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
-!                             &(state->next), &(state->distbits), state->work);
-              if (ret) {
-                  strm->msg = (char *)"invalid distances set";
-                  state->mode = BAD;
--- 413,421 ----
-              }
-              state->distcode = (code const FAR *)(state->next);
-              state->distbits = 6;
-!             ret = inflate_table9(DISTS, state->lens + state->nlen,
-!                             state->ndist, &(state->next), &(state->distbits),
-!                             state->work);
-              if (ret) {
-                  strm->msg = (char *)"invalid distances set";
-                  state->mode = BAD;
-***************
-*** 458,473 ****
-              state->mode = LEN;
-  
-          case LEN:
-             /* use inflate_fast() if we have enough input and output */
-             if (have >= 6 && left >= 258) {
-                 RESTORE();
-                 if (state->whave < state->wsize)
-                     state->whave = state->wsize - left;
-                 inflate_fast(strm, state->wsize);
-                 LOAD();
-                 break;
-             }
- 
-              /* get a literal, length, or end-of-block code */
-              for (;;) {
-                  this = state->lencode[BITS(state->lenbits)];
--- 425,430 ----
-***************
-*** 607,613 ****
-      return ret;
-  }
-  
-! int ZEXPORT inflateBackEnd(strm)
-  z_stream FAR *strm;
-  {
-      if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
--- 564,570 ----
-      return ret;
-  }
-  
-! int ZEXPORT inflateBack9End(strm)
-  z_stream FAR *strm;
-  {
-      if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
-*** inftrees.c	Sun Sep  7 10:59:10 2003
--- inftree9.c	Mon Sep  8 20:54:36 2003
-***************
-*** 1,15 ****
-! /* inftrees.c -- generate Huffman trees for efficient decoding
-   * Copyright (C) 1995-2003 Mark Adler
-   * For conditions of distribution and use, see copyright notice in zlib.h
-   */
-  
-  #include "zutil.h"
-! #include "inftrees.h"
-  
-  #define MAXBITS 15
-  
-! const char inflate_copyright[] =
-!    " inflate 1.2.0.5 Copyright 1995-2003 Mark Adler ";
-  /*
-    If you use the zlib library in a product, an acknowledgment is welcome
-    in the documentation of your product. If for some reason you cannot
--- 1,15 ----
-! /* inftree9.c -- generate Huffman trees for efficient decoding
-   * Copyright (C) 1995-2003 Mark Adler
-   * For conditions of distribution and use, see copyright notice in zlib.h
-   */
-  
-  #include "zutil.h"
-! #include "inftree9.h"
-  
-  #define MAXBITS 15
-  
-! const char inflate9_copyright[] =
-!    " inflate9 1.2.0.5 Copyright 1995-2003 Mark Adler ";
-  /*
-    If you use the zlib library in a product, an acknowledgment is welcome
-    in the documentation of your product. If for some reason you cannot
-***************
-*** 29,35 ****
-     table index bits.  It will differ if the request is greater than the
-     longest code or if it is less than the shortest code.
-   */
-! int inflate_table(type, lens, codes, table, bits, work)
-  codetype type;
-  unsigned short FAR *lens;
-  unsigned codes;
--- 29,35 ----
-     table index bits.  It will differ if the request is greater than the
-     longest code or if it is less than the shortest code.
-   */
-! int inflate_table9(type, lens, codes, table, bits, work)
-  codetype type;
-  unsigned short FAR *lens;
-  unsigned codes;
-***************
-*** 59,76 ****
-      unsigned short offs[MAXBITS+1];     /* offsets in table for each length */
-      static const unsigned short lbase[31] = { /* Length codes 257..285 base */
-          3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
-!         35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
-      static const unsigned short lext[31] = { /* Length codes 257..285 extra */
-          16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-!         19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 192, 78};
-!     static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
-          1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
-          257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
-!         8193, 12289, 16385, 24577, 0, 0};
-!     static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
-          16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
-          23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
-!         28, 28, 29, 29, 64, 64};
-  
-      /*
-         Process a set of code lengths to create a canonical Huffman code.  The
--- 59,76 ----
-      unsigned short offs[MAXBITS+1];     /* offsets in table for each length */
-      static const unsigned short lbase[31] = { /* Length codes 257..285 base */
-          3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
-!         35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 3, 0, 0};
-      static const unsigned short lext[31] = { /* Length codes 257..285 extra */
-          16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-!         19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 32, 192, 78};
-!     static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
-          1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
-          257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
-!         8193, 12289, 16385, 24577, 32769, 49153};
-!     static const unsigned short dext[32] = { /* Distance codes 0..31 extra */
-          16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
-          23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
-!         28, 28, 29, 29, 30, 30};
-  
-      /*
-         Process a set of code lengths to create a canonical Huffman code.  The
-*** inftrees.h	Sun Aug 10 15:15:50 2003
--- inftree9.h	Mon Sep  8 20:54:51 2003
-***************
-*** 1,4 ****
-! /* inftrees.h -- header to use inftrees.c
-   * Copyright (C) 1995-2003 Mark Adler
-   * For conditions of distribution and use, see copyright notice in zlib.h
-   */
--- 1,4 ----
-! /* inftree9.h -- header to use inftree9.c
-   * Copyright (C) 1995-2003 Mark Adler
-   * For conditions of distribution and use, see copyright notice in zlib.h
-   */
-***************
-*** 50,55 ****
-      DISTS
-  } codetype;
-  
-! extern int inflate_table OF((codetype type, unsigned short FAR *lens,
-                               unsigned codes, code FAR * FAR *table,
-                               unsigned FAR *bits, unsigned short FAR *work));
--- 50,55 ----
-      DISTS
-  } codetype;
-  
-! extern int inflate_table9 OF((codetype type, unsigned short FAR *lens,
-                               unsigned codes, code FAR * FAR *table,
-                               unsigned FAR *bits, unsigned short FAR *work));
--- a/contrib/infback9/infback9.h
+++ b/contrib/infback9/infback9.h
@@ -7,10 +7,13 @@
 * This header file and associated patches provide a decoder for PKWare's
 * undocumented deflate64 compression method (method 9).  Use with infback9.c,
 * inftree9.h, inftree9.c, and inffix9.h.  These patches are not supported.
- * This code will almost certainly not work on 16-bit architectures.  See the
+ * This should be compiled with zlib, since it uses zutil.h and zutil.o.
+ * This code has not yet been tested on 16-bit architectures.  See the
 * comments in zlib.h for inflateBack() usage.  These functions are used
 * identically, except that there is no windowBits parameter, and a 64K
- * window must be provided.  zlib.h must be included before this header file.
+ * window must be provided.  Also if int's are 16 bits, then a zero for
+ * the third parameter of the "out" function actually means 65536UL.
+ * zlib.h must be included before this header file.
 */

 ZEXTERN int ZEXPORT inflateBack9 OF((z_stream FAR *strm,
--- a/contrib/infback9/inffix9.h
+++ b/contrib/infback9/inffix9.h
@@ -1,5 +1,5 @@
-    /* inffix9.h -- table for decoding fixed codes
-     * Generated automatically by makefixed().
+    /* inffix9.h -- table for decoding deflate64 fixed codes
+     * Generated automatically by makefixed9().
     */

    /* WARNING: this file should *not* be used by applications.
@@ -8,87 +8,100 @@
     */

    static const code lenfix[512] = {
-        {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
-        {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
-        {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
-        {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
-        {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
-        {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
-        {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
-        {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
-        {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
-        {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
-        {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
-        {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
-        {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
-        {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
-        {0,8,22},{192,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
-        {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
-        {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
-        {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
-        {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
-        {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
-        {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
-        {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
-        {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
-        {0,8,85},{0,8,21},{32,8,3},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
-        {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
-        {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
-        {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
-        {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
-        {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
-        {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
-        {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
-        {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
-        {16,7,5},{0,8,87},{0,8,23},{78,8,0},{19,7,51},{0,8,119},{0,8,55},
-        {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
-        {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
-        {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
-        {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
-        {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
-        {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
-        {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
-        {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
-        {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
-        {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
-        {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
-        {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
-        {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
-        {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
-        {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
-        {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
-        {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
-        {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{192,8,0},{19,7,51},
-        {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
-        {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
-        {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
-        {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
-        {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
-        {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
-        {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
-        {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
-        {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{32,8,3},
-        {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
-        {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
-        {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
-        {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
-        {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
-        {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
-        {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
-        {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
-        {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
-        {78,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
-        {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
-        {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
-        {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
-        {0,9,255}
+        {96,7,0},{0,8,80},{0,8,16},{132,8,115},{130,7,31},{0,8,112},
+        {0,8,48},{0,9,192},{128,7,10},{0,8,96},{0,8,32},{0,9,160},
+        {0,8,0},{0,8,128},{0,8,64},{0,9,224},{128,7,6},{0,8,88},
+        {0,8,24},{0,9,144},{131,7,59},{0,8,120},{0,8,56},{0,9,208},
+        {129,7,17},{0,8,104},{0,8,40},{0,9,176},{0,8,8},{0,8,136},
+        {0,8,72},{0,9,240},{128,7,4},{0,8,84},{0,8,20},{133,8,227},
+        {131,7,43},{0,8,116},{0,8,52},{0,9,200},{129,7,13},{0,8,100},
+        {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},
+        {128,7,8},{0,8,92},{0,8,28},{0,9,152},{132,7,83},{0,8,124},
+        {0,8,60},{0,9,216},{130,7,23},{0,8,108},{0,8,44},{0,9,184},
+        {0,8,12},{0,8,140},{0,8,76},{0,9,248},{128,7,3},{0,8,82},
+        {0,8,18},{133,8,163},{131,7,35},{0,8,114},{0,8,50},{0,9,196},
+        {129,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},{0,8,130},
+        {0,8,66},{0,9,228},{128,7,7},{0,8,90},{0,8,26},{0,9,148},
+        {132,7,67},{0,8,122},{0,8,58},{0,9,212},{130,7,19},{0,8,106},
+        {0,8,42},{0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},
+        {128,7,5},{0,8,86},{0,8,22},{65,8,0},{131,7,51},{0,8,118},
+        {0,8,54},{0,9,204},{129,7,15},{0,8,102},{0,8,38},{0,9,172},
+        {0,8,6},{0,8,134},{0,8,70},{0,9,236},{128,7,9},{0,8,94},
+        {0,8,30},{0,9,156},{132,7,99},{0,8,126},{0,8,62},{0,9,220},
+        {130,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
+        {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{133,8,131},
+        {130,7,31},{0,8,113},{0,8,49},{0,9,194},{128,7,10},{0,8,97},
+        {0,8,33},{0,9,162},{0,8,1},{0,8,129},{0,8,65},{0,9,226},
+        {128,7,6},{0,8,89},{0,8,25},{0,9,146},{131,7,59},{0,8,121},
+        {0,8,57},{0,9,210},{129,7,17},{0,8,105},{0,8,41},{0,9,178},
+        {0,8,9},{0,8,137},{0,8,73},{0,9,242},{128,7,4},{0,8,85},
+        {0,8,21},{144,8,3},{131,7,43},{0,8,117},{0,8,53},{0,9,202},
+        {129,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},
+        {0,8,69},{0,9,234},{128,7,8},{0,8,93},{0,8,29},{0,9,154},
+        {132,7,83},{0,8,125},{0,8,61},{0,9,218},{130,7,23},{0,8,109},
+        {0,8,45},{0,9,186},{0,8,13},{0,8,141},{0,8,77},{0,9,250},
+        {128,7,3},{0,8,83},{0,8,19},{133,8,195},{131,7,35},{0,8,115},
+        {0,8,51},{0,9,198},{129,7,11},{0,8,99},{0,8,35},{0,9,166},
+        {0,8,3},{0,8,131},{0,8,67},{0,9,230},{128,7,7},{0,8,91},
+        {0,8,27},{0,9,150},{132,7,67},{0,8,123},{0,8,59},{0,9,214},
+        {130,7,19},{0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},
+        {0,8,75},{0,9,246},{128,7,5},{0,8,87},{0,8,23},{77,8,0},
+        {131,7,51},{0,8,119},{0,8,55},{0,9,206},{129,7,15},{0,8,103},
+        {0,8,39},{0,9,174},{0,8,7},{0,8,135},{0,8,71},{0,9,238},
+        {128,7,9},{0,8,95},{0,8,31},{0,9,158},{132,7,99},{0,8,127},
+        {0,8,63},{0,9,222},{130,7,27},{0,8,111},{0,8,47},{0,9,190},
+        {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},
+        {0,8,16},{132,8,115},{130,7,31},{0,8,112},{0,8,48},{0,9,193},
+        {128,7,10},{0,8,96},{0,8,32},{0,9,161},{0,8,0},{0,8,128},
+        {0,8,64},{0,9,225},{128,7,6},{0,8,88},{0,8,24},{0,9,145},
+        {131,7,59},{0,8,120},{0,8,56},{0,9,209},{129,7,17},{0,8,104},
+        {0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},{0,9,241},
+        {128,7,4},{0,8,84},{0,8,20},{133,8,227},{131,7,43},{0,8,116},
+        {0,8,52},{0,9,201},{129,7,13},{0,8,100},{0,8,36},{0,9,169},
+        {0,8,4},{0,8,132},{0,8,68},{0,9,233},{128,7,8},{0,8,92},
+        {0,8,28},{0,9,153},{132,7,83},{0,8,124},{0,8,60},{0,9,217},
+        {130,7,23},{0,8,108},{0,8,44},{0,9,185},{0,8,12},{0,8,140},
+        {0,8,76},{0,9,249},{128,7,3},{0,8,82},{0,8,18},{133,8,163},
+        {131,7,35},{0,8,114},{0,8,50},{0,9,197},{129,7,11},{0,8,98},
+        {0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
+        {128,7,7},{0,8,90},{0,8,26},{0,9,149},{132,7,67},{0,8,122},
+        {0,8,58},{0,9,213},{130,7,19},{0,8,106},{0,8,42},{0,9,181},
+        {0,8,10},{0,8,138},{0,8,74},{0,9,245},{128,7,5},{0,8,86},
+        {0,8,22},{65,8,0},{131,7,51},{0,8,118},{0,8,54},{0,9,205},
+        {129,7,15},{0,8,102},{0,8,38},{0,9,173},{0,8,6},{0,8,134},
+        {0,8,70},{0,9,237},{128,7,9},{0,8,94},{0,8,30},{0,9,157},
+        {132,7,99},{0,8,126},{0,8,62},{0,9,221},{130,7,27},{0,8,110},
+        {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},
+        {96,7,0},{0,8,81},{0,8,17},{133,8,131},{130,7,31},{0,8,113},
+        {0,8,49},{0,9,195},{128,7,10},{0,8,97},{0,8,33},{0,9,163},
+        {0,8,1},{0,8,129},{0,8,65},{0,9,227},{128,7,6},{0,8,89},
+        {0,8,25},{0,9,147},{131,7,59},{0,8,121},{0,8,57},{0,9,211},
+        {129,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},{0,8,137},
+        {0,8,73},{0,9,243},{128,7,4},{0,8,85},{0,8,21},{144,8,3},
+        {131,7,43},{0,8,117},{0,8,53},{0,9,203},{129,7,13},{0,8,101},
+        {0,8,37},{0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},
+        {128,7,8},{0,8,93},{0,8,29},{0,9,155},{132,7,83},{0,8,125},
+        {0,8,61},{0,9,219},{130,7,23},{0,8,109},{0,8,45},{0,9,187},
+        {0,8,13},{0,8,141},{0,8,77},{0,9,251},{128,7,3},{0,8,83},
+        {0,8,19},{133,8,195},{131,7,35},{0,8,115},{0,8,51},{0,9,199},
+        {129,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
+        {0,8,67},{0,9,231},{128,7,7},{0,8,91},{0,8,27},{0,9,151},
+        {132,7,67},{0,8,123},{0,8,59},{0,9,215},{130,7,19},{0,8,107},
+        {0,8,43},{0,9,183},{0,8,11},{0,8,139},{0,8,75},{0,9,247},
+        {128,7,5},{0,8,87},{0,8,23},{77,8,0},{131,7,51},{0,8,119},
+        {0,8,55},{0,9,207},{129,7,15},{0,8,103},{0,8,39},{0,9,175},
+        {0,8,7},{0,8,135},{0,8,71},{0,9,239},{128,7,9},{0,8,95},
+        {0,8,31},{0,9,159},{132,7,99},{0,8,127},{0,8,63},{0,9,223},
+        {130,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},
+        {0,8,79},{0,9,255}
    };

    static const code distfix[32] = {
-        {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
-        {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
-        {18,5,9},{26,5,2049},{22,5,129},{30,5,32769},{16,5,2},{23,5,385},
-        {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
-        {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
-        {22,5,193},{30,5,49153}
+        {128,5,1},{135,5,257},{131,5,17},{139,5,4097},{129,5,5},
+        {137,5,1025},{133,5,65},{141,5,16385},{128,5,3},{136,5,513},
+        {132,5,33},{140,5,8193},{130,5,9},{138,5,2049},{134,5,129},
+        {142,5,32769},{128,5,2},{135,5,385},{131,5,25},{139,5,6145},
+        {129,5,7},{137,5,1537},{133,5,97},{141,5,24577},{128,5,4},
+        {136,5,769},{132,5,49},{140,5,12289},{130,5,13},{138,5,3073},
+        {134,5,193},{142,5,49153}
    };
--- a/contrib/infback9/inflate9.h
+++ b/contrib/infback9/inflate9.h
@@ -0,0 +1,47 @@
+/* inflate9.h -- internal inflate state definition
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* Possible inflate modes between inflate() calls */
+typedef enum {
+        TYPE,       /* i: waiting for type bits, including last-flag bit */
+        STORED,     /* i: waiting for stored size (length and complement) */
+        TABLE,      /* i: waiting for dynamic block table lengths */
+            LEN,        /* i: waiting for length/lit code */
+    DONE,       /* finished check, done -- remain here until reset */
+    BAD         /* got a data error -- remain here until reset */
+} inflate_mode;
+
+/*
+    State transitions between above modes -
+
+    (most modes can go to the BAD mode -- not shown for clarity)
+
+    Read deflate blocks:
+            TYPE -> STORED or TABLE or LEN or DONE
+            STORED -> TYPE
+            TABLE -> LENLENS -> CODELENS -> LEN
+    Read deflate codes:
+                LEN -> LEN or TYPE
+ */
+
+/* state maintained between inflate() calls.  Approximately 7K bytes. */
+struct inflate_state {
+        /* sliding window */
+    unsigned char FAR *window;  /* allocated sliding window, if needed */
+        /* dynamic table building */
+    unsigned ncode;             /* number of code length code lengths */
+    unsigned nlen;              /* number of length code lengths */
+    unsigned ndist;             /* number of distance code lengths */
+    unsigned have;              /* number of code lengths in lens[] */
+    code FAR *next;             /* next available space in codes[] */
+    unsigned short lens[320];   /* temporary storage for code lengths */
+    unsigned short work[288];   /* work area for code table building */
+    code codes[ENOUGH];         /* space for code tables */
+};
--- a/contrib/infback9/inftree9.c
+++ b/contrib/infback9/inftree9.c
@@ -0,0 +1,323 @@
+/* inftree9.c -- generate Huffman trees for efficient decoding
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zutil.h"
+#include "inftree9.h"
+
+#define MAXBITS 15
+
+const char inflate9_copyright[] =
+   " inflate9 1.2.2.1 Copyright 1995-2004 Mark Adler ";
+/*
+  If you use the zlib library in a product, an acknowledgment is welcome
+  in the documentation of your product. If for some reason you cannot
+  include such an acknowledgment, I would appreciate that you keep this
+  copyright string in the executable of your product.
+ */
+
+/*
+   Build a set of tables to decode the provided canonical Huffman code.
+   The code lengths are lens[0..codes-1].  The result starts at *table,
+   whose indices are 0..2^bits-1.  work is a writable array of at least
+   lens shorts, which is used as a work area.  type is the type of code
+   to be generated, CODES, LENS, or DISTS.  On return, zero is success,
+   -1 is an invalid code, and +1 means that ENOUGH isn't enough.  table
+   on return points to the next available entry's address.  bits is the
+   requested root table index bits, and on return it is the actual root
+   table index bits.  It will differ if the request is greater than the
+   longest code or if it is less than the shortest code.
+ */
+int inflate_table9(type, lens, codes, table, bits, work)
+codetype type;
+unsigned short FAR *lens;
+unsigned codes;
+code FAR * FAR *table;
+unsigned FAR *bits;
+unsigned short FAR *work;
+{
+    unsigned len;               /* a code's length in bits */
+    unsigned sym;               /* index of code symbols */
+    unsigned min, max;          /* minimum and maximum code lengths */
+    unsigned root;              /* number of index bits for root table */
+    unsigned curr;              /* number of index bits for current table */
+    unsigned drop;              /* code bits to drop for sub-table */
+    int left;                   /* number of prefix codes available */
+    unsigned used;              /* code entries in table used */
+    unsigned huff;              /* Huffman code */
+    unsigned incr;              /* for incrementing code, index */
+    unsigned fill;              /* index for replicating entries */
+    unsigned low;               /* low bits for current root entry */
+    unsigned mask;              /* mask for low root bits */
+    code this;                  /* table entry for duplication */
+    code FAR *next;             /* next available space in table */
+    const unsigned short FAR *base;     /* base value table to use */
+    const unsigned short FAR *extra;    /* extra bits table to use */
+    int end;                    /* use base and extra for symbol > end */
+    unsigned short count[MAXBITS+1];    /* number of codes of each length */
+    unsigned short offs[MAXBITS+1];     /* offsets in table for each length */
+    static const unsigned short lbase[31] = { /* Length codes 257..285 base */
+        3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17,
+        19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115,
+        131, 163, 195, 227, 3, 0, 0};
+    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
+        128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
+        130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
+        133, 133, 133, 133, 144, 77, 207};
+    static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
+        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
+        65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,
+        4097, 6145, 8193, 12289, 16385, 24577, 32769, 49153};
+    static const unsigned short dext[32] = { /* Distance codes 0..31 extra */
+        128, 128, 128, 128, 129, 129, 130, 130, 131, 131, 132, 132,
+        133, 133, 134, 134, 135, 135, 136, 136, 137, 137, 138, 138,
+        139, 139, 140, 140, 141, 141, 142, 142};
+
+    /*
+       Process a set of code lengths to create a canonical Huffman code.  The
+       code lengths are lens[0..codes-1].  Each length corresponds to the
+       symbols 0..codes-1.  The Huffman code is generated by first sorting the
+       symbols by length from short to long, and retaining the symbol order
+       for codes with equal lengths.  Then the code starts with all zero bits
+       for the first code of the shortest length, and the codes are integer
+       increments for the same length, and zeros are appended as the length
+       increases.  For the deflate format, these bits are stored backwards
+       from their more natural integer increment ordering, and so when the
+       decoding tables are built in the large loop below, the integer codes
+       are incremented backwards.
+
+       This routine assumes, but does not check, that all of the entries in
+       lens[] are in the range 0..MAXBITS.  The caller must assure this.
+       1..MAXBITS is interpreted as that code length.  zero means that that
+       symbol does not occur in this code.
+
+       The codes are sorted by computing a count of codes for each length,
+       creating from that a table of starting indices for each length in the
+       sorted table, and then entering the symbols in order in the sorted
+       table.  The sorted table is work[], with that space being provided by
+       the caller.
+
+       The length counts are used for other purposes as well, i.e. finding
+       the minimum and maximum length codes, determining if there are any
+       codes at all, checking for a valid set of lengths, and looking ahead
+       at length counts to determine sub-table sizes when building the
+       decoding tables.
+     */
+
+    /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
+    for (len = 0; len <= MAXBITS; len++)
+        count[len] = 0;
+    for (sym = 0; sym < codes; sym++)
+        count[lens[sym]]++;
+
+    /* bound code lengths, force root to be within code lengths */
+    root = *bits;
+    for (max = MAXBITS; max >= 1; max--)
+        if (count[max] != 0) break;
+    if (root > max) root = max;
+    if (max == 0) return -1;            /* no codes! */
+    for (min = 1; min <= MAXBITS; min++)
+        if (count[min] != 0) break;
+    if (root < min) root = min;
+
+    /* check for an over-subscribed or incomplete set of lengths */
+    left = 1;
+    for (len = 1; len <= MAXBITS; len++) {
+        left <<= 1;
+        left -= count[len];
+        if (left < 0) return -1;        /* over-subscribed */
+    }
+    if (left > 0 && (type == CODES || (codes - count[0] != 1)))
+        return -1;                      /* incomplete set */
+
+    /* generate offsets into symbol table for each length for sorting */
+    offs[1] = 0;
+    for (len = 1; len < MAXBITS; len++)
+        offs[len + 1] = offs[len] + count[len];
+
+    /* sort symbols by length, by symbol order within each length */
+    for (sym = 0; sym < codes; sym++)
+        if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
+
+    /*
+       Create and fill in decoding tables.  In this loop, the table being
+       filled is at next and has curr index bits.  The code being used is huff
+       with length len.  That code is converted to an index by dropping drop
+       bits off of the bottom.  For codes where len is less than drop + curr,
+       those top drop + curr - len bits are incremented through all values to
+       fill the table with replicated entries.
+
+       root is the number of index bits for the root table.  When len exceeds
+       root, sub-tables are created pointed to by the root entry with an index
+       of the low root bits of huff.  This is saved in low to check for when a
+       new sub-table should be started.  drop is zero when the root table is
+       being filled, and drop is root when sub-tables are being filled.
+
+       When a new sub-table is needed, it is necessary to look ahead in the
+       code lengths to determine what size sub-table is needed.  The length
+       counts are used for this, and so count[] is decremented as codes are
+       entered in the tables.
+
+       used keeps track of how many table entries have been allocated from the
+       provided *table space.  It is checked when a LENS table is being made
+       against the space in *table, ENOUGH, minus the maximum space needed by
+       the worst case distance code, MAXD.  This should never happen, but the
+       sufficiency of ENOUGH has not been proven exhaustively, hence the check.
+       This assumes that when type == LENS, bits == 9.
+
+       sym increments through all symbols, and the loop terminates when
+       all codes of length max, i.e. all codes, have been processed.  This
+       routine permits incomplete codes, so another loop after this one fills
+       in the rest of the decoding tables with invalid code markers.
+     */
+
+    /* set up for code type */
+    switch (type) {
+    case CODES:
+        base = extra = work;    /* dummy value--not used */
+        end = 19;
+        break;
+    case LENS:
+        base = lbase;
+        base -= 257;
+        extra = lext;
+        extra -= 257;
+        end = 256;
+        break;
+    default:            /* DISTS */
+        base = dbase;
+        extra = dext;
+        end = -1;
+    }
+
+    /* initialize state for loop */
+    huff = 0;                   /* starting code */
+    sym = 0;                    /* starting code symbol */
+    len = min;                  /* starting code length */
+    next = *table;              /* current table to fill in */
+    curr = root;                /* current table index bits */
+    drop = 0;                   /* current bits to drop from code for index */
+    low = (unsigned)(-1);       /* trigger new sub-table when len > root */
+    used = 1U << root;          /* use root table entries */
+    mask = used - 1;            /* mask for comparing low */
+
+    /* check available table space */
+    if (type == LENS && used >= ENOUGH - MAXD)
+        return 1;
+
+    /* process all codes and make table entries */
+    for (;;) {
+        /* create table entry */
+        this.bits = (unsigned char)(len - drop);
+        if ((int)(work[sym]) < end) {
+            this.op = (unsigned char)0;
+            this.val = work[sym];
+        }
+        else if ((int)(work[sym]) > end) {
+            this.op = (unsigned char)(extra[work[sym]]);
+            this.val = base[work[sym]];
+        }
+        else {
+            this.op = (unsigned char)(32 + 64);         /* end of block */
+            this.val = 0;
+        }
+
+        /* replicate for those indices with low len bits equal to huff */
+        incr = 1U << (len - drop);
+        fill = 1U << curr;
+        do {
+            fill -= incr;
+            next[(huff >> drop) + fill] = this;
+        } while (fill != 0);
+
+        /* backwards increment the len-bit code huff */
+        incr = 1U << (len - 1);
+        while (huff & incr)
+            incr >>= 1;
+        if (incr != 0) {
+            huff &= incr - 1;
+            huff += incr;
+        }
+        else
+            huff = 0;
+
+        /* go to next symbol, update count, len */
+        sym++;
+        if (--(count[len]) == 0) {
+            if (len == max) break;
+            len = lens[work[sym]];
+        }
+
+        /* create new sub-table if needed */
+        if (len > root && (huff & mask) != low) {
+            /* if first time, transition to sub-tables */
+            if (drop == 0)
+                drop = root;
+
+            /* increment past last table */
+            next += 1U << curr;
+
+            /* determine length of next table */
+            curr = len - drop;
+            left = (int)(1 << curr);
+            while (curr + drop < max) {
+                left -= count[curr + drop];
+                if (left <= 0) break;
+                curr++;
+                left <<= 1;
+            }
+
+            /* check for enough space */
+            used += 1U << curr;
+            if (type == LENS && used >= ENOUGH - MAXD)
+                return 1;
+
+            /* point entry in root table to sub-table */
+            low = huff & mask;
+            (*table)[low].op = (unsigned char)curr;
+            (*table)[low].bits = (unsigned char)root;
+            (*table)[low].val = (unsigned short)(next - *table);
+        }
+    }
+
+    /*
+       Fill in rest of table for incomplete codes.  This loop is similar to the
+       loop above in incrementing huff for table indices.  It is assumed that
+       len is equal to curr + drop, so there is no loop needed to increment
+       through high index bits.  When the current sub-table is filled, the loop
+       drops back to the root table to fill in any remaining entries there.
+     */
+    this.op = (unsigned char)64;                /* invalid code marker */
+    this.bits = (unsigned char)(len - drop);
+    this.val = (unsigned short)0;
+    while (huff != 0) {
+        /* when done with sub-table, drop back to root table */
+        if (drop != 0 && (huff & mask) != low) {
+            drop = 0;
+            len = root;
+            next = *table;
+            curr = root;
+            this.bits = (unsigned char)len;
+        }
+
+        /* put invalid code marker in table */
+        next[huff >> drop] = this;
+
+        /* backwards increment the len-bit code huff */
+        incr = 1U << (len - 1);
+        while (huff & incr)
+            incr >>= 1;
+        if (incr != 0) {
+            huff &= incr - 1;
+            huff += incr;
+        }
+        else
+            huff = 0;
+    }
+
+    /* set return parameters */
+    *table += used;
+    *bits = root;
+    return 0;
+}
--- a/contrib/infback9/inftree9.h
+++ b/contrib/infback9/inftree9.h
@@ -0,0 +1,55 @@
+/* inftree9.h -- header to use inftree9.c
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* Structure for decoding tables.  Each entry provides either the
+   information needed to do the operation requested by the code that
+   indexed that table entry, or it provides a pointer to another
+   table that indexes more bits of the code.  op indicates whether
+   the entry is a pointer to another table, a literal, a length or
+   distance, an end-of-block, or an invalid code.  For a table
+   pointer, the low four bits of op is the number of index bits of
+   that table.  For a length or distance, the low four bits of op
+   is the number of extra bits to get after the code.  bits is
+   the number of bits in this code or part of the code to drop off
+   of the bit buffer.  val is the actual byte to output in the case
+   of a literal, the base length or distance, or the offset from
+   the current table to the next table.  Each entry is four bytes. */
+typedef struct {
+    unsigned char op;           /* operation, extra bits, table bits */
+    unsigned char bits;         /* bits in this part of the code */
+    unsigned short val;         /* offset in table or code value */
+} code;
+
+/* op values as set by inflate_table():
+    00000000 - literal
+    0000tttt - table link, tttt != 0 is the number of table index bits
+    100eeeee - length or distance, eeee is the number of extra bits
+    01100000 - end of block
+    01000000 - invalid code
+ */
+
+/* Maximum size of dynamic tree.  The maximum found in a long but non-
+   exhaustive search was 1004 code structures (850 for length/literals
+   and 154 for distances, the latter actually the result of an
+   exhaustive search).  The true maximum is not known, but the value
+   below is more than safe. */
+#define ENOUGH 1440
+#define MAXD 154
+
+/* Type of code to build for inftable() */
+typedef enum {
+    CODES,
+    LENS,
+    DISTS
+} codetype;
+
+extern int inflate_table9 OF((codetype type, unsigned short FAR *lens,
+                             unsigned codes, code FAR * FAR *table,
+                             unsigned FAR *bits, unsigned short FAR *work));
--- a/contrib/inflate86/inffas86.c
+++ b/contrib/inflate86/inffas86.c
--- a/contrib/inflate86/inffast.S
+++ b/contrib/inflate86/inffast.S
@@ -188,17 +188,8 @@
 /*
 * typedef enum inflate_mode consts, in inflate.h
 */
-#ifndef NO_GUNZIP
-#define GUNZIP
-#endif
-
-#ifdef GUNZIP
 #define INFLATE_MODE_TYPE 11  /* state->mode flags enum-ed in inflate.h */
 #define INFLATE_MODE_BAD  26
-#else
-#define INFLATE_MODE_TYPE 3
-#define INFLATE_MODE_BAD  17
-#endif


 #if ! defined( USE_MMX ) && ! defined( NO_MMX )
--- a/contrib/masmx86/mkasm.bat
+++ b/contrib/masmx86/mkasm.bat
@@ -1,3 +1,3 @@
-cl /I..\.. /O2 /c gvmat32c.c
+cl /DASMV /I..\.. /O2 /c gvmat32c.c
 ml /coff /Zi /c /Flgvmat32.lst gvmat32.asm
 ml /coff /Zi /c /Flinffas32.lst inffas32.asm
--- a/contrib/minizip/ChangeLogUnzip
+++ b/contrib/minizip/ChangeLogUnzip
@@ -1,3 +1,15 @@
+Change in 1.01b (20 may 04)
+- Integrate patch from Debian package (submited by Mark Brown)
+- Add tools mztools from Xavier Roche
+
+Change in 1.01 (8 may 04)
+- fix buffer overrun risk in unzip.c (Xavier Roche)
+- fix a minor buffer insecurity in minizip.c (Mike Whittaker)
+
+Change in 1.00: (10 sept 03)
+- rename to 1.00
+- cosmetic code change
+
 Change in 0.22: (19 May 03)
 - crypting support (unless you define NOCRYPT)
 - append file in existing zipfile
--- a/contrib/minizip/crypt.h
+++ b/contrib/minizip/crypt.h
@@ -1,3 +1,31 @@
+/* crypt.h -- base code for crypt/uncrypt ZIPfile
+
+
+   Version 1.01, May 8th, 2004
+
+   Copyright (C) 1998-2004 Gilles Vollant
+
+   This code is a modified version of crypting code in Infozip distribution
+
+   The encryption/decryption parts of this source code (as opposed to the
+   non-echoing password parts) were originally written in Europe.  The
+   whole source package can be freely distributed, including from the USA.
+   (Prior to January 2000, re-export from the US was a violation of US law.)
+
+   This encryption code is a direct transcription of the algorithm from
+   Roger Schlafly, described by Phil Katz in the file appnote.txt.  This
+   file (appnote.txt) is distributed with the PKZIP program (even in the
+   version without encryption capabilities).
+
+   If you don't need crypting in your application, just define symbols
+   NOCRYPT and NOUNCRYPT.
+
+   This code support the "Traditional PKWARE Encryption".
+
+   The new AES encryption added on Zip format by Winzip (see the page
+   http://www.winzip.com/aes_info.htm ) and PKWare PKZip 5.x Strong
+   Encryption is not supported.
+*/

 #define CRC32(c, b) ((*(pcrc_32_tab+(((int)(c) ^ (b)) & 0xff))) ^ ((c) >> 8))

--- a/contrib/minizip/ioapi.c
+++ b/contrib/minizip/ioapi.c
@@ -1,9 +1,9 @@
 /* ioapi.c -- IO base function header for compress/uncompress .zip
   files using zlib + zip or unzip API

-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant
 */

 #include <stdio.h>
@@ -94,7 +94,7 @@ uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
   uLong size;
 {
    uLong ret;
-    ret = fread(buf, 1, (size_t)size, (FILE *)stream);
+    ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
    return ret;
 }

@@ -106,7 +106,7 @@ uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
   uLong size;
 {
    uLong ret;
-    ret = fwrite(buf, 1, (size_t)size, (FILE *)stream);
+    ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
    return ret;
 }

--- a/contrib/minizip/ioapi.h
+++ b/contrib/minizip/ioapi.h
@@ -1,9 +1,9 @@
 /* ioapi.h -- IO base function header for compress/uncompress .zip
   files using zlib + zip or unzip API

-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant
 */

 #ifndef _ZLIBIOAPI_H
--- a/contrib/minizip/iowin32.c
+++ b/contrib/minizip/iowin32.c
@@ -2,9 +2,9 @@
   files using zlib + zip or unzip API
   This IO API version uses the Win32 API (for Microsoft Windows)

-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant
 */

 #include <stdlib.h>
--- a/contrib/minizip/iowin32.h
+++ b/contrib/minizip/iowin32.h
@@ -2,9 +2,9 @@
   files using zlib + zip or unzip API
   This IO API version uses the Win32 API (for Microsoft Windows)

-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant
 */

 #include <windows.h>
--- a/contrib/minizip/miniunz.c
+++ b/contrib/minizip/miniunz.c
@@ -1,3 +1,11 @@
+/*
+   miniunz.c
+   Version 1.01b, May 30th, 2004
+
+   Copyright (C) 1998-2004 Gilles Vollant
+*/
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -27,7 +35,7 @@
  mini unzip, demo of unzip package

  usage :
-  Usage : miniunz [-exvlo] file.zip [file_to_extract]
+  Usage : miniunz [-exvlo] file.zip [file_to_extract] [-d extractdir]

  list the file in the zipfile, and print the content of FILE_ID.ZIP or README.TXT
    if it exists
@@ -140,17 +148,18 @@ int makedir (newdir)

 void do_banner()
 {
-    printf("MiniUnz 0.22, demo of zLib + Unz package written by Gilles Vollant\n");
+    printf("MiniUnz 1.01b, demo of zLib + Unz package written by Gilles Vollant\n");
    printf("more info at http://www.winimage.com/zLibDll/unzip.html\n\n");
 }

 void do_help()
 {
-    printf("Usage : miniunz [-e] [-x] [-v] [-l] [-o] [-p password] file.zip [file_to_extr.]\n\n" \
+    printf("Usage : miniunz [-e] [-x] [-v] [-l] [-o] [-p password] file.zip [file_to_extr.] [-d extractdir]\n\n" \
           "  -e  Extract without pathname (junk paths)\n" \
           "  -x  Extract with pathname\n" \
           "  -v  list files\n" \
           "  -l  list files\n" \
+           "  -d  directory to extract into\n" \
           "  -o  overwrite files without prompting\n" \
           "  -p  extract crypted file using password\n\n");
 }
@@ -304,8 +313,14 @@ int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
                do
                {
                    char answer[128];
-                    printf("The file %s exist. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);
-                    scanf("%1s",answer);
+                    int ret;
+
+                    printf("The file %s exists. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);
+                    ret = scanf("%1s",answer);
+                    if (ret != 1)
+                    {
+                       exit(EXIT_FAILURE);
+                    }
                    rep = answer[0] ;
                    if ((rep>='a') && (rep<='z'))
                        rep -= 0x20;
@@ -459,6 +474,8 @@ int main(argc,argv)
    int opt_do_extract=1;
    int opt_do_extract_withoutpath=0;
    int opt_overwrite=0;
+    int opt_extractdir=0;
+    const char *dirname=NULL;
    unzFile uf=NULL;

    do_banner();
@@ -488,6 +505,12 @@ int main(argc,argv)
                        opt_do_extract = opt_do_extract_withoutpath = 1;
                    if ((c=='o') || (c=='O'))
                        opt_overwrite=1;
+                    if ((c=='d') || (c=='D'))
+                    {
+                        opt_extractdir=1;
+                        dirname=argv[i+1];
+                    }
+
                    if (((c=='p') || (c=='P')) && (i+1<argc))
                    {
                        password=argv[i+1];
@@ -499,7 +522,7 @@ int main(argc,argv)
            {
                if (zipfilename == NULL)
                    zipfilename = argv[i];
-                else if (filename_to_extract==NULL)
+                else if ((filename_to_extract==NULL) && (!opt_extractdir))
                        filename_to_extract = argv[i] ;
            }
        }
@@ -544,6 +567,12 @@ int main(argc,argv)
        return do_list(uf);
    else if (opt_do_extract==1)
    {
+        if (opt_extractdir && chdir(dirname))
+        {
+          printf("Error changing into %s, aborting\n", dirname);
+          exit(-1);
+        }
+
        if (filename_to_extract == NULL)
            return do_extract(uf,opt_do_extract_withoutpath,opt_overwrite,password);
        else
--- a/contrib/minizip/minizip.c
+++ b/contrib/minizip/minizip.c
@@ -1,3 +1,10 @@
+/*
+   minizip.c
+   Version 1.01b, May 30th, 2004
+
+   Copyright (C) 1998-2004 Gilles Vollant
+*/
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -66,6 +73,8 @@ uLong filetime(f, tmzip, dt)
  {
    char name[MAXFILENAME+1];
    int len = strlen(f);
+    if (len > MAXFILENAME)
+      len = MAXFILENAME;

    strncpy(name, f,MAXFILENAME-1);
    /* strncpy doesnt append the trailing NULL, of the string is too long. */
@@ -120,7 +129,7 @@ int check_exist_file(filename)

 void do_banner()
 {
-    printf("MiniZip 0.22, demo of zLib + Zip package written by Gilles Vollant\n");
+    printf("MiniZip 1.01b, demo of zLib + Zip package written by Gilles Vollant\n");
    printf("more info at http://www.winimage.com/zLibDll/unzip.html\n\n");
 }

@@ -269,8 +278,13 @@ int main(argc,argv)
                do
                {
                    char answer[128];
-                    printf("The file %s exist. Overwrite ? [y]es, [n]o, [a]ppend : ",filename_try);
-                    scanf("%1s",answer);
+                    int ret;
+                    printf("The file %s exists. Overwrite ? [y]es, [n]o, [a]ppend : ",filename_try);
+                    ret = scanf("%1s",answer);
+                    if (ret != 1)
+                    {
+                       exit(EXIT_FAILURE);
+                    }
                    rep = answer[0] ;
                    if ((rep>='a') && (rep<='z'))
                        rep -= 0x20;
@@ -305,7 +319,12 @@ int main(argc,argv)

        for (i=zipfilenamearg+1;(i<argc) && (err==ZIP_OK);i++)
        {
-            if (((*(argv[i]))!='-') && ((*(argv[i]))!='/'))
+            if (!((((*(argv[i]))=='-') || ((*(argv[i]))=='/')) &&
+                  ((argv[i][1]=='o') || (argv[i][1]=='O') ||
+                   (argv[i][1]=='a') || (argv[i][1]=='A') ||
+                   (argv[i][1]=='p') || (argv[i][1]=='P') ||
+                   ((argv[i][1]>='0') || (argv[i][1]<='9'))) &&
+                  (strlen(argv[i]) == 2)))
            {
                FILE * fin;
                int size_read;
@@ -391,6 +410,10 @@ int main(argc,argv)
        if (errclose != ZIP_OK)
            printf("error in closing %s\n",filename_try);
    }
+    else
+    {
+       do_help();
+    }

    free(buf);
    return 0;
--- a/contrib/minizip/mztools.c
+++ b/contrib/minizip/mztools.c
@@ -0,0 +1,281 @@
+/*
+  Additional tools for Minizip
+  Code: Xavier Roche '2004
+  License: Same as ZLIB (www.gzip.org)
+*/
+
+/* Code */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "zlib.h"
+#include "unzip.h"
+
+#define READ_8(adr)  ((unsigned char)*(adr))
+#define READ_16(adr) ( READ_8(adr) | (READ_8(adr+1) << 8) )
+#define READ_32(adr) ( READ_16(adr) | (READ_16((adr)+2) << 16) )
+
+#define WRITE_8(buff, n) do { \
+  *((unsigned char*)(buff)) = (unsigned char) ((n) & 0xff); \
+} while(0)
+#define WRITE_16(buff, n) do { \
+  WRITE_8((unsigned char*)(buff), n); \
+  WRITE_8(((unsigned char*)(buff)) + 1, (n) >> 8); \
+} while(0)
+#define WRITE_32(buff, n) do { \
+  WRITE_16((unsigned char*)(buff), (n) & 0xffff); \
+  WRITE_16((unsigned char*)(buff) + 2, (n) >> 16); \
+} while(0)
+
+extern int ZEXPORT unzRepair(file, fileOut, fileOutTmp, nRecovered, bytesRecovered)
+const char* file;
+const char* fileOut;
+const char* fileOutTmp;
+uLong* nRecovered;
+uLong* bytesRecovered;
+{
+  int err = Z_OK;
+  FILE* fpZip = fopen(file, "rb");
+  FILE* fpOut = fopen(fileOut, "wb");
+  FILE* fpOutCD = fopen(fileOutTmp, "wb");
+  if (fpZip != NULL &&  fpOut != NULL) {
+    int entries = 0;
+    uLong totalBytes = 0;
+    char header[30];
+    char filename[256];
+    char extra[1024];
+    int offset = 0;
+    int offsetCD = 0;
+    while ( fread(header, 1, 30, fpZip) == 30 ) {
+      int currentOffset = offset;
+
+      /* File entry */
+      if (READ_32(header) == 0x04034b50) {
+        unsigned int version = READ_16(header + 4);
+        unsigned int gpflag = READ_16(header + 6);
+        unsigned int method = READ_16(header + 8);
+        unsigned int filetime = READ_16(header + 10);
+        unsigned int filedate = READ_16(header + 12);
+        unsigned int crc = READ_32(header + 14); /* crc */
+        unsigned int cpsize = READ_32(header + 18); /* compressed size */
+        unsigned int uncpsize = READ_32(header + 22); /* uncompressed sz */
+        unsigned int fnsize = READ_16(header + 26); /* file name length */
+        unsigned int extsize = READ_16(header + 28); /* extra field length */
+        filename[0] = extra[0] = '\0';
+
+        /* Header */
+        if (fwrite(header, 1, 30, fpOut) == 30) {
+          offset += 30;
+        } else {
+          err = Z_ERRNO;
+          break;
+        }
+
+        /* Filename */
+        if (fnsize > 0) {
+          if (fread(filename, 1, fnsize, fpZip) == fnsize) {
+            if (fwrite(filename, 1, fnsize, fpOut) == fnsize) {
+              offset += fnsize;
+            } else {
+              err = Z_ERRNO;
+              break;
+            }
+          } else {
+            err = Z_ERRNO;
+            break;
+          }
+        } else {
+          err = Z_STREAM_ERROR;
+          break;
+        }
+
+        /* Extra field */
+        if (extsize > 0) {
+          if (fread(extra, 1, extsize, fpZip) == extsize) {
+            if (fwrite(extra, 1, extsize, fpOut) == extsize) {
+              offset += extsize;
+            } else {
+              err = Z_ERRNO;
+              break;
+            }
+          } else {
+            err = Z_ERRNO;
+            break;
+          }
+        }
+
+        /* Data */
+        {
+          int dataSize = cpsize;
+          if (dataSize == 0) {
+            dataSize = uncpsize;
+          }
+          if (dataSize > 0) {
+            char* data = malloc(dataSize);
+            if (data != NULL) {
+              if ((int)fread(data, 1, dataSize, fpZip) == dataSize) {
+                if ((int)fwrite(data, 1, dataSize, fpOut) == dataSize) {
+                  offset += dataSize;
+                  totalBytes += dataSize;
+                } else {
+                  err = Z_ERRNO;
+                }
+              } else {
+                err = Z_ERRNO;
+              }
+              free(data);
+              if (err != Z_OK) {
+                break;
+              }
+            } else {
+              err = Z_MEM_ERROR;
+              break;
+            }
+          }
+        }
+
+        /* Central directory entry */
+        {
+          char header[46];
+          char* comment = "";
+          int comsize = (int) strlen(comment);
+          WRITE_32(header, 0x02014b50);
+          WRITE_16(header + 4, version);
+          WRITE_16(header + 6, version);
+          WRITE_16(header + 8, gpflag);
+          WRITE_16(header + 10, method);
+          WRITE_16(header + 12, filetime);
+          WRITE_16(header + 14, filedate);
+          WRITE_32(header + 16, crc);
+          WRITE_32(header + 20, cpsize);
+          WRITE_32(header + 24, uncpsize);
+          WRITE_16(header + 28, fnsize);
+          WRITE_16(header + 30, extsize);
+          WRITE_16(header + 32, comsize);
+          WRITE_16(header + 34, 0);     /* disk # */
+          WRITE_16(header + 36, 0);     /* int attrb */
+          WRITE_32(header + 38, 0);     /* ext attrb */
+          WRITE_32(header + 42, currentOffset);
+          /* Header */
+          if (fwrite(header, 1, 46, fpOutCD) == 46) {
+            offsetCD += 46;
+
+            /* Filename */
+            if (fnsize > 0) {
+              if (fwrite(filename, 1, fnsize, fpOutCD) == fnsize) {
+                offsetCD += fnsize;
+              } else {
+                err = Z_ERRNO;
+                break;
+              }
+            } else {
+              err = Z_STREAM_ERROR;
+              break;
+            }
+
+            /* Extra field */
+            if (extsize > 0) {
+              if (fwrite(extra, 1, extsize, fpOutCD) == extsize) {
+                offsetCD += extsize;
+              } else {
+                err = Z_ERRNO;
+                break;
+              }
+            }
+
+            /* Comment field */
+            if (comsize > 0) {
+              if ((int)fwrite(comment, 1, comsize, fpOutCD) == comsize) {
+                offsetCD += comsize;
+              } else {
+                err = Z_ERRNO;
+                break;
+              }
+            }
+
+
+          } else {
+            err = Z_ERRNO;
+            break;
+          }
+        }
+
+        /* Success */
+        entries++;
+
+      } else {
+        break;
+      }
+    }
+
+    /* Final central directory  */
+    {
+      int entriesZip = entries;
+      char header[22];
+      char* comment = ""; // "ZIP File recovered by zlib/minizip/mztools";
+      int comsize = (int) strlen(comment);
+      if (entriesZip > 0xffff) {
+        entriesZip = 0xffff;
+      }
+      WRITE_32(header, 0x06054b50);
+      WRITE_16(header + 4, 0);    /* disk # */
+      WRITE_16(header + 6, 0);    /* disk # */
+      WRITE_16(header + 8, entriesZip);   /* hack */
+      WRITE_16(header + 10, entriesZip);  /* hack */
+      WRITE_32(header + 12, offsetCD);    /* size of CD */
+      WRITE_32(header + 16, offset);      /* offset to CD */
+      WRITE_16(header + 20, comsize);     /* comment */
+
+      /* Header */
+      if (fwrite(header, 1, 22, fpOutCD) == 22) {
+
+        /* Comment field */
+        if (comsize > 0) {
+          if ((int)fwrite(comment, 1, comsize, fpOutCD) != comsize) {
+            err = Z_ERRNO;
+          }
+        }
+
+      } else {
+        err = Z_ERRNO;
+      }
+    }
+
+    /* Final merge (file + central directory) */
+    fclose(fpOutCD);
+    if (err == Z_OK) {
+      fpOutCD = fopen(fileOutTmp, "rb");
+      if (fpOutCD != NULL) {
+        int nRead;
+        char buffer[8192];
+        while ( (nRead = fread(buffer, 1, sizeof(buffer), fpOutCD)) > 0) {
+          if ((int)fwrite(buffer, 1, nRead, fpOut) != nRead) {
+            err = Z_ERRNO;
+            break;
+          }
+        }
+        fclose(fpOutCD);
+      }
+    }
+
+    /* Close */
+    fclose(fpZip);
+    fclose(fpOut);
+
+    /* Wipe temporary file */
+    (void)remove(fileOutTmp);
+
+    /* Number of recovered entries */
+    if (err == Z_OK) {
+      if (nRecovered != NULL) {
+        *nRecovered = entries;
+      }
+      if (bytesRecovered != NULL) {
+        *bytesRecovered = totalBytes;
+      }
+    }
+  } else {
+    err = Z_STREAM_ERROR;
+  }
+  return err;
+}
--- a/contrib/minizip/mztools.h
+++ b/contrib/minizip/mztools.h
@@ -0,0 +1,31 @@
+/*
+  Additional tools for Minizip
+  Code: Xavier Roche '2004
+  License: Same as ZLIB (www.gzip.org)
+*/
+
+#ifndef _zip_tools_H
+#define _zip_tools_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef _ZLIB_H
+#include "zlib.h"
+#endif
+
+#include "unzip.h"
+
+/* Repair a ZIP file (missing central directory)
+   file: file to recover
+   fileOut: output file after recovery
+   fileOutTmp: temporary file name used for recovery
+*/
+extern int ZEXPORT unzRepair(const char* file,
+                             const char* fileOut,
+                             const char* fileOutTmp,
+                             uLong* nRecovered,
+                             uLong* bytesRecovered);
+
+#endif
--- a/contrib/minizip/unzip.c
+++ b/contrib/minizip/unzip.c
@@ -1,7 +1,7 @@
 /* unzip.c -- IO for uncompress .zip files using zlib
-   Version 0.22, May 19th, 2003
+   Version 1.01d, September 22th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant

   Read unzip.h for more info
 */
@@ -88,7 +88,7 @@ woven in by Terry Thorsen 1/2003.


 const char unz_copyright[] =
-   " unzip 0.22 Copyright 1998-2003 Gilles Vollant - http://www.winimage.com/zLibDll";
+   " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";

 /* unz_file_info_interntal contain internal info about a file in zipfile*/
 typedef struct unz_file_info_internal_s
@@ -798,6 +798,7 @@ extern int ZEXPORT unzGoToNextFile (file)
    s=(unz_s*)file;
    if (!s->current_file_ok)
        return UNZ_END_OF_LIST_OF_FILE;
+    if (s->gi.number_entry != 0xffff)    /* 2^16 files overflow hack */
      if (s->num_file+1==s->gi.number_entry)
        return UNZ_END_OF_LIST_OF_FILE;

@@ -1244,10 +1245,18 @@ extern int ZEXPORT unzReadCurrentFile  (file, buf, len)

    pfile_in_zip_read_info->stream.avail_out = (uInt)len;

-    if (len>pfile_in_zip_read_info->rest_read_uncompressed)
+    if ((len>pfile_in_zip_read_info->rest_read_uncompressed) &&
+        (!(pfile_in_zip_read_info->raw)))
        pfile_in_zip_read_info->stream.avail_out =
            (uInt)pfile_in_zip_read_info->rest_read_uncompressed;

+    if ((len>pfile_in_zip_read_info->rest_read_compressed+
+           pfile_in_zip_read_info->stream.avail_in) &&
+         (pfile_in_zip_read_info->raw))
+        pfile_in_zip_read_info->stream.avail_out =
+            (uInt)pfile_in_zip_read_info->rest_read_compressed+
+            pfile_in_zip_read_info->stream.avail_in;
+
    while (pfile_in_zip_read_info->stream.avail_out>0)
    {
        if ((pfile_in_zip_read_info->stream.avail_in==0) &&
@@ -1339,6 +1348,9 @@ extern int ZEXPORT unzReadCurrentFile  (file, buf, len)
            */
            err=inflate(&pfile_in_zip_read_info->stream,flush);

+            if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
+              err = Z_DATA_ERROR;
+
            uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
            uOutThis = uTotalOutAfter-uTotalOutBefore;

@@ -1461,7 +1473,7 @@ extern int ZEXPORT unzGetLocalExtrafield (file,buf,len)

    if (ZREAD(pfile_in_zip_read_info->z_filefunc,
              pfile_in_zip_read_info->filestream,
-              buf,size_to_read)!=size_to_read)
+              buf,read_now)!=read_now)
        return UNZ_ERRNO;

    return (int)read_now;
@@ -1544,3 +1556,40 @@ extern int ZEXPORT unzGetGlobalComment (file, szComment, uSizeBuf)
        *(szComment+s->gi.size_comment)='\0';
    return (int)uReadThis;
 }
+
+/* Additions by RX '2004 */
+extern uLong ZEXPORT unzGetOffset (file)
+    unzFile file;
+{
+    unz_s* s;
+
+    if (file==NULL)
+          return UNZ_PARAMERROR;
+    s=(unz_s*)file;
+    if (!s->current_file_ok)
+      return 0;
+    if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff)
+      if (s->num_file==s->gi.number_entry)
+         return 0;
+    return s->pos_in_central_dir;
+}
+
+extern int ZEXPORT unzSetOffset (file, pos)
+        unzFile file;
+        uLong pos;
+{
+    unz_s* s;
+    int err;
+
+    if (file==NULL)
+        return UNZ_PARAMERROR;
+    s=(unz_s*)file;
+
+    s->pos_in_central_dir = pos;
+    s->num_file = s->gi.number_entry;      /* hack */
+    err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
+                                              &s->cur_file_info_internal,
+                                              NULL,0,NULL,0,NULL,0);
+    s->current_file_ok = (err == UNZ_OK);
+    return err;
+}
--- a/contrib/minizip/unzip.h
+++ b/contrib/minizip/unzip.h
@@ -1,7 +1,7 @@
 /* unzip.h -- IO for uncompress .zip files using zlib
-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant

   This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
     WinZip, InfoZip tools and compatible.
@@ -335,6 +335,16 @@ extern int ZEXPORT unzGetLocalExtrafield OF((unzFile file,
    the error code
 */

+/***************************************************************************/
+
+/* Get the current file offset */
+extern uLong ZEXPORT unzGetOffset (unzFile file);
+
+/* Set the current file offset */
+extern int ZEXPORT unzSetOffset (unzFile file, uLong pos);
+
+
+
 #ifdef __cplusplus
 }
 #endif
--- a/contrib/minizip/zip.c
+++ b/contrib/minizip/zip.c
@@ -1,5 +1,7 @@
 /* zip.c -- IO on .zip files using zlib
-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004
+
+   Copyright (C) 1998-2004 Gilles Vollant

   Read zip.h for more info
 */
@@ -75,7 +77,7 @@
 #endif
 #endif
 const char zip_copyright[] =
-   " zip 0.22 Copyright 1998-2003 Gilles Vollant - http://www.winimage.com/zLibDll";
+   " zip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";


 #define SIZEDATA_INDATABLOCK (4096-(4*4))
@@ -263,10 +265,19 @@ local int ziplocal_putValue (pzlib_filefunc_def, filestream, x, nbByte)
 {
    unsigned char buf[4];
    int n;
-    for (n = 0; n < nbByte; n++) {
+    for (n = 0; n < nbByte; n++)
+    {
        buf[n] = (unsigned char)(x & 0xff);
        x >>= 8;
    }
+    if (x != 0)
+      {     /* data overflow - hack for ZIP64 (X Roche) */
+      for (n = 0; n < nbByte; n++)
+        {
+          buf[n] = 0xff;
+        }
+      }
+
    if (ZWRITE(*pzlib_filefunc_def,filestream,buf,nbByte)!=(uLong)nbByte)
        return ZIP_ERRNO;
    else
@@ -285,7 +296,16 @@ local void ziplocal_putValue_inmemory (dest, x, nbByte)
        buf[n] = (unsigned char)(x & 0xff);
        x >>= 8;
    }
+
+    if (x != 0)
+    {     /* data overflow - hack for ZIP64 */
+       for (n = 0; n < nbByte; n++)
+       {
+          buf[n] = 0xff;
+       }
+    }
 }
+
 /****************************************************************************/


@@ -697,9 +717,9 @@ extern int ZEXPORT zipOpenNewFileInZip3 (file, filename, zipfi,
    if (comment==NULL)
        size_comment = 0;
    else
-        size_comment = strlen(comment);
+        size_comment = (uInt)strlen(comment);

-    size_filename = strlen(filename);
+    size_filename = (uInt)strlen(filename);

    if (zipfi == NULL)
        zi->ci.dosDate = 0;
@@ -1106,7 +1126,7 @@ extern int ZEXPORT zipClose (file, global_comment)
    if (global_comment==NULL)
        size_global_comment = 0;
    else
-        size_global_comment = strlen(global_comment);
+        size_global_comment = (uInt)strlen(global_comment);


    centraldir_pos_inzip = ZTELL(zi->z_filefunc,zi->filestream);
--- a/contrib/minizip/zip.h
+++ b/contrib/minizip/zip.h
@@ -1,7 +1,7 @@
 /* zip.h -- IO for compress .zip files using zlib
-   Version 0.22, May 19th, 2003
+   Version 1.01, May 8th, 2004

-   Copyright (C) 1998-2003 Gilles Vollant
+   Copyright (C) 1998-2004 Gilles Vollant

   This unzip package allow creates .ZIP file, compatible with PKZip 2.04g
     WinZip, InfoZip tools and compatible.
@@ -212,7 +212,6 @@ extern int ZEXPORT zipCloseFileInZip OF((zipFile file));
  Close the current file in the zipfile
 */

-
 extern int ZEXPORT zipCloseFileInZipRaw OF((zipFile file,
                                            uLong uncompressed_size,
                                            uLong crc32));
--- a/contrib/pascal/zlibpas.pas
+++ b/contrib/pascal/zlibpas.pas
@@ -10,7 +10,7 @@ unit zlibpas;
 interface

 const
-  ZLIB_VERSION = '1.2.0';
+  ZLIB_VERSION = '1.2.2';

 type
  alloc_func = function(opaque: Pointer; items, size: Integer): Pointer;
@@ -97,6 +97,7 @@ function deflateCopy(var dest, source: z_stream): Integer;
 function deflateReset(var strm: z_stream): Integer;
 function deflateParams(var strm: z_stream; level, strategy: Integer): Integer;
 function deflateBound(var strm: z_stream; sourceLen: LongInt): LongInt;
+function deflatePrime(var strm: z_stream; bits, value: Integer): Integer;
 function inflateInit2(var strm: z_stream; windowBits: Integer): Integer;
 function inflateSetDictionary(var strm: z_stream; const dictionary: PChar;
                              dictLength: Integer): Integer;
@@ -165,6 +166,7 @@ function deflateEnd; external;
 function deflateInit_; external;
 function deflateInit2_; external;
 function deflateParams; external;
+function deflatePrime; external;
 function deflateReset; external;
 function deflateSetDictionary; external;
 function inflate; external;
--- a/contrib/puff/puff.c
+++ b/contrib/puff/puff.c
@@ -1,8 +1,8 @@
 /*
 * puff.c
- * Copyright (C) 2002, 2003 Mark Adler
+ * Copyright (C) 2002-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in puff.h
- * version 1.7, 3 Mar 2003
+ * version 1.8, 9 Jan 2004
 *
 * puff.c is a simple inflate written to be an unambiguous way to specify the
 * deflate format.  It is not written for speed but rather simplicity.  As a
@@ -58,8 +58,9 @@
 *                      - Add FIXLCODES #define
 * 1.5   6 Apr 2002     - Minor comment fixes
 * 1.6   7 Aug 2002     - Minor format changes
- * 1.7   3 Mar 2002     - Added test code for distribution
+ * 1.7   3 Mar 2003     - Added test code for distribution
 *                      - Added zlib-like license
+ * 1.8   9 Jan 2004     - Added some comments on no distance codes case
 */

 #include <setjmp.h>             /* for setjmp(), longjmp(), and jmp_buf */
@@ -577,6 +578,9 @@ local int fixed(struct state *s)
 *   block is fewer bits), but it is allowed by the format.  So incomplete
 *   literal/length codes of one symbol should also be permitted.
 *
+ * - If there are only literal codes and no lengths, then there are no distance
+ *   codes.  This is represented by one distance code with zero bits.
+ *
 * - The list of up to 286 length/literal lengths and up to 30 distance lengths
 *   are themselves compressed using Huffman codes and run-length encoding.  In
 *   the list of code lengths, a 0 symbol means no code, a 1..15 symbol means
--- a/contrib/untgz/untgz.c
+++ b/contrib/untgz/untgz.c
@@ -1,8 +1,9 @@
 /*
- * untgz.c -- Display contents and/or extract file from
- * a gzip'd TAR file
- * written by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+ * untgz.c -- Display contents and extract files from a gzip'd TAR file
+ *
+ * written by Pedro A. Aranda Gutierrez <paag@tid.es>
 * adaptation to Unix by Jean-loup Gailly <jloup@gzip.org>
+ * various fixes by Cosmin Truta <cosmint@cs.ubbcluj.ro>
 */

 #include <stdio.h>
@@ -10,7 +11,9 @@
 #include <string.h>
 #include <time.h>
 #include <errno.h>
-#include <fcntl.h>
+
+#include "zlib.h"
+
 #ifdef unix
 #  include <unistd.h>
 #else
@@ -18,27 +21,23 @@
 #  include <io.h>
 #endif

-#include "zlib.h"
-
 #ifdef WIN32
 #include <windows.h>
 #  ifndef F_OK
-#    define F_OK (0)
+#    define F_OK  0
 #  endif
+#  define mkdir(dirname,mode)   _mkdir(dirname)
 #  ifdef _MSC_VER
-#    define mkdir(dirname,mode) _mkdir(dirname)
-#    define strdup(str)         _strdup(str)
-#    define unlink(fn)          _unlink(fn)
 #    define access(path,mode)   _access(path,mode)
-#  else
-#    define mkdir(dirname,mode) _mkdir(dirname)
+#    define chmod(path,mode)    _chmod(path,mode)
+#    define strdup(str)         _strdup(str)
 #  endif
 #else
 #  include <utime.h>
 #endif


-/* Values used in typeflag field.  */
+/* values used in typeflag field */

 #define REGTYPE  '0'            /* regular file */
 #define AREGTYPE '\0'           /* regular file */
@@ -50,7 +49,21 @@
 #define FIFOTYPE '6'            /* FIFO special */
 #define CONTTYPE '7'            /* reserved */

+/* GNU tar extensions */
+
+#define GNUTYPE_DUMPDIR  'D'    /* file names from dumped directory */
+#define GNUTYPE_LONGLINK 'K'    /* long link name */
+#define GNUTYPE_LONGNAME 'L'    /* long file name */
+#define GNUTYPE_MULTIVOL 'M'    /* continuation of file from another volume */
+#define GNUTYPE_NAMES    'N'    /* file name that does not fit into main hdr */
+#define GNUTYPE_SPARSE   'S'    /* sparse file */
+#define GNUTYPE_VOLHDR   'V'    /* tape/volume header */
+
+
+/* tar header */
+
 #define BLOCKSIZE     512
+#define SHORTNAMESIZE 100

 struct tar_header
 {                               /* byte offset */
@@ -73,19 +86,31 @@ struct tar_header
                                /* 500 */
 };

-union tar_buffer {
+union tar_buffer
+{
  char               buffer[BLOCKSIZE];
  struct tar_header  header;
 };

-enum { TGZ_EXTRACT = 0, TGZ_LIST };
+struct attr_item
+{
+  struct attr_item  *next;
+  char              *fname;
+  int                mode;
+  time_t             time;
+};

-static char *TGZfname   OF((const char *));
+enum { TGZ_EXTRACT, TGZ_LIST, TGZ_INVALID };
+
+char *TGZfname          OF((const char *));
 void TGZnotfound        OF((const char *));

 int getoct              OF((char *, int));
 char *strtime           OF((time_t *));
-int setftime            OF((char *, time_t));
+int setfiletime         OF((char *, time_t));
+void push_attr          OF((struct attr_item **, char *, int, time_t));
+void restore_attr       OF((struct attr_item **));
+
 int ExprMatch           OF((char *, char *));

 int makedir             OF((char *));
@@ -99,19 +124,17 @@ int main                OF((int, char **));

 char *prog;

-/* This will give a benign warning */
+const char *TGZsuffix[] = { "\0", ".tar", ".tar.gz", ".taz", ".tgz", NULL };

-static char *TGZsuffix[] = { "\0", ".tar", ".tar.gz", ".taz", ".tgz", NULL };
+/* return the file name of the TGZ archive */
+/* or NULL if it does not exist */

-/* Return the real name of the TGZ archive */
-/* or NULL if it does not exist. */
-
-static char *TGZfname (const char *fname)
+char *TGZfname (const char *arcname)
 {
  static char buffer[1024];
  int origlen,i;

-  strcpy(buffer,fname);
+  strcpy(buffer,arcname);
  origlen = strlen(buffer);

  for (i=0; TGZsuffix[i]; i++)
@@ -123,55 +146,67 @@ static char *TGZfname (const char *fname)
  return NULL;
 }

+
 /* error message for the filename */

-void TGZnotfound (const char *fname)
+void TGZnotfound (const char *arcname)
 {
  int i;

-  fprintf(stderr,"%s : couldn't find ",prog);
+  fprintf(stderr,"%s: Couldn't find ",prog);
  for (i=0;TGZsuffix[i];i++)
    fprintf(stderr,(TGZsuffix[i+1]) ? "%s%s, " : "or %s%s\n",
-            fname,
+            arcname,
            TGZsuffix[i]);
  exit(1);
 }


-/* help functions */
+/* convert octal digits to int */
+/* on error return -1 */

 int getoct (char *p,int width)
 {
  int result = 0;
  char c;

-  while (width --)
+  while (width--)
    {
      c = *p++;
-      if (c == ' ')
-        continue;
      if (c == 0)
        break;
+      if (c == ' ')
+        continue;
+      if (c < '0' || c > '7')
+        return -1;
      result = result * 8 + (c - '0');
    }
  return result;
 }

+
+/* convert time_t to string */
+/* use the "YYYY/MM/DD hh:mm:ss" format */
+
 char *strtime (time_t *t)
 {
  struct tm   *local;
  static char result[32];

  local = localtime(t);
-  sprintf(result,"%2d/%02d/%4d %02d:%02d:%02d",
-          local->tm_mday, local->tm_mon+1, local->tm_year+1900,
+  sprintf(result,"%4d/%02d/%02d %02d:%02d:%02d",
+          local->tm_year+1900, local->tm_mon+1, local->tm_mday,
          local->tm_hour, local->tm_min, local->tm_sec);
  return result;
 }

-int setftime (char *fname,time_t ftime)
+
+/* set file time */
+
+int setfiletime (char *fname,time_t ftime)
 {
 #ifdef WIN32
+  static int isWinNT = -1;
  SYSTEMTIME st;
  FILETIME locft, modft;
  struct tm *loctm;
@@ -194,8 +229,11 @@ int setftime (char *fname,time_t ftime)
      !LocalFileTimeToFileTime(&locft, &modft))
    return -1;

-  hFile = CreateFile(fname, GENERIC_READ | GENERIC_WRITE,
-                     0, NULL, OPEN_EXISTING, 0, 0);
+  if (isWinNT < 0)
+    isWinNT = (GetVersion() < 0x80000000) ? 1 : 0;
+  hFile = CreateFile(fname, GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
+                     (isWinNT ? FILE_FLAG_BACKUP_SEMANTICS : 0),
+                     NULL);
  if (hFile == INVALID_HANDLE_VALUE)
    return -1;
  result = SetFileTime(hFile, NULL, NULL, &modft) ? 0 : -1;
@@ -210,7 +248,42 @@ int setftime (char *fname,time_t ftime)
 }


-/* regular expression matching */
+/* push file attributes */
+
+void push_attr(struct attr_item **list,char *fname,int mode,time_t time)
+{
+  struct attr_item *item;
+
+  item = (struct attr_item *)malloc(sizeof(struct attr_item));
+  if (item == NULL)
+    error("Out of memory");
+  item->fname = strdup(fname);
+  item->mode  = mode;
+  item->time  = time;
+  item->next  = *list;
+  *list       = item;
+}
+
+
+/* restore file attributes */
+
+void restore_attr(struct attr_item **list)
+{
+  struct attr_item *item, *prev;
+
+  for (item = *list; item != NULL; )
+    {
+      setfiletime(item->fname,item->time);
+      chmod(item->fname,item->mode);
+      prev = item;
+      item = item->next;
+      free(prev);
+    }
+  *list = NULL;
+}
+
+
+/* match regular expression */

 #define ISSPECIAL(c) (((c) == '*') || ((c) == '/'))

@@ -246,10 +319,9 @@ int ExprMatch (char *string,char *expr)
    }
 }

-/* recursive make directory */
-/* abort if you get an ENOENT errno somewhere in the middle */
-/* e.g. ignore error "mkdir on existing directory" */
-/* */
+
+/* recursive mkdir */
+/* abort on ENOENT; ignore other errors like "directory already exists" */
 /* return 1 if OK */
 /*        0 on error */

@@ -266,7 +338,7 @@ int makedir (char *newdir)
  if (buffer[len-1] == '/') {
    buffer[len-1] = '\0';
  }
-  if (mkdir(buffer, 0775) == 0)
+  if (mkdir(buffer, 0755) == 0)
    {
      free(buffer);
      return 1;
@@ -281,9 +353,9 @@ int makedir (char *newdir)
        p++;
      hold = *p;
      *p = 0;
-      if ((mkdir(buffer, 0775) == -1) && (errno == ENOENT))
+      if ((mkdir(buffer, 0755) == -1) && (errno == ENOENT))
        {
-          fprintf(stderr,"%s: couldn't create directory %s\n",prog,buffer);
+          fprintf(stderr,"%s: Couldn't create directory %s\n",prog,buffer);
          free(buffer);
          return 0;
        }
@@ -295,6 +367,7 @@ int makedir (char *newdir)
  return 1;
 }

+
 int matchname (int arg,int argc,char **argv,char *fname)
 {
  if (arg == argc)      /* no arguments given (untgz tgzarchive) */
@@ -308,7 +381,7 @@ int matchname (int arg,int argc,char **argv,char *fname)
 }


-/* Tar file list or extract */
+/* tar file list or extract */

 int tar (gzFile in,int action,int arg,int argc,char **argv)
 {
@@ -319,54 +392,92 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
  int    remaining = 0;
  FILE   *outfile = NULL;
  char   fname[BLOCKSIZE];
+  int    tarmode;
  time_t tartime;
+  struct attr_item *attributes = NULL;

  if (action == TGZ_LIST)
-    printf("     day      time     size                       file\n"
+    printf("    date      time     size                       file\n"
           " ---------- -------- --------- -------------------------------------\n");
  while (1)
    {
      len = gzread(in, &buffer, BLOCKSIZE);
      if (len < 0)
-        error (gzerror(in, &err));
+        error(gzerror(in, &err));
      /*
       * Always expect complete blocks to process
       * the tar information.
       */
      if (len != BLOCKSIZE)
-        error("gzread: incomplete block read");
+        {
+          action = TGZ_INVALID; /* force error exit */
+          remaining = 0;        /* force I/O cleanup */
+        }

      /*
       * If we have to get a tar header
       */
-      if (getheader == 1)
+      if (getheader >= 1)
        {
          /*
           * if we met the end of the tar
           * or the end-of-tar block,
           * we are done
           */
-          if ((len == 0)  || (buffer.header.name[0]== 0)) break;
+          if (len == 0 || buffer.header.name[0] == 0)
+            break;

+          tarmode = getoct(buffer.header.mode,8);
          tartime = (time_t)getoct(buffer.header.mtime,12);
-          strcpy(fname,buffer.header.name);
+          if (tarmode == -1 || tartime == (time_t)-1)
+            {
+              buffer.header.name[0] = 0;
+              action = TGZ_INVALID;
+            }

+          if (getheader == 1)
+            {
+              strncpy(fname,buffer.header.name,SHORTNAMESIZE);
+              if (fname[SHORTNAMESIZE-1] != 0)
+                  fname[SHORTNAMESIZE] = 0;
+            }
+          else
+            {
+              /*
+               * The file name is longer than SHORTNAMESIZE
+               */
+              if (strncmp(fname,buffer.header.name,SHORTNAMESIZE-1) != 0)
+                  error("bad long name");
+              getheader = 1;
+            }
+
+          /*
+           * Act according to the type flag
+           */
          switch (buffer.header.typeflag)
            {
            case DIRTYPE:
              if (action == TGZ_LIST)
                printf(" %s     <dir> %s\n",strtime(&tartime),fname);
              if (action == TGZ_EXTRACT)
+                {
                  makedir(fname);
+                  push_attr(&attributes,fname,tarmode,tartime);
+                }
              break;
            case REGTYPE:
            case AREGTYPE:
              remaining = getoct(buffer.header.size,12);
+              if (remaining == -1)
+                {
+                  action = TGZ_INVALID;
+                  break;
+                }
              if (action == TGZ_LIST)
                printf(" %s %9d %s\n",strtime(&tartime),remaining,fname);
-              if (action == TGZ_EXTRACT)
+              else if (action == TGZ_EXTRACT)
                {
-                  if ((remaining) && (matchname(arg,argc,argv,fname)))
+                  if (matchname(arg,argc,argv,fname))
                    {
                      outfile = fopen(fname,"wb");
                      if (outfile == NULL) {
@@ -379,18 +490,33 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
                          outfile = fopen(fname,"wb");
                        }
                      }
-                      fprintf(stderr,
-                              "%s %s\n",
-                              (outfile) ? "Extracting" : "Couldn't create",
-                              fname);
+                      if (outfile != NULL)
+                        printf("Extracting %s\n",fname);
+                      else
+                        fprintf(stderr, "%s: Couldn't create %s",prog,fname);
                    }
                  else
                    outfile = NULL;
                }
-              /*
-               * could have no contents
-               */
-              getheader = (remaining) ? 0 : 1;
+              getheader = 0;
+              break;
+            case GNUTYPE_LONGLINK:
+            case GNUTYPE_LONGNAME:
+              remaining = getoct(buffer.header.size,12);
+              if (remaining < 0 || remaining >= BLOCKSIZE)
+                {
+                  action = TGZ_INVALID;
+                  break;
+                }
+              len = gzread(in, fname, BLOCKSIZE);
+              if (len < 0)
+                error(gzerror(in, &err));
+              if (fname[BLOCKSIZE-1] != 0 || (int)strlen(fname) > remaining)
+                {
+                  action = TGZ_INVALID;
+                  break;
+                }
+              getheader = 2;
              break;
            default:
              if (action == TGZ_LIST)
@@ -402,29 +528,47 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
        {
          unsigned int bytes = (remaining > BLOCKSIZE) ? BLOCKSIZE : remaining;

-          if ((action == TGZ_EXTRACT) && (outfile != NULL))
+          if (outfile != NULL)
            {
              if (fwrite(&buffer,sizeof(char),bytes,outfile) != bytes)
                {
-                  fprintf(stderr,"%s : error writing %s skipping...\n",prog,fname);
+                  fprintf(stderr,
+                    "%s: Error writing %s -- skipping\n",prog,fname);
                  fclose(outfile);
-                  unlink(fname);
+                  outfile = NULL;
+                  remove(fname);
                }
            }
          remaining -= bytes;
+        }
+
      if (remaining == 0)
        {
          getheader = 1;
-              if ((action == TGZ_EXTRACT) && (outfile != NULL))
+          if (outfile != NULL)
            {
              fclose(outfile);
              outfile = NULL;
-                  setftime(fname,tartime);
+              if (action != TGZ_INVALID)
+                push_attr(&attributes,fname,tarmode,tartime);
            }
        }
+
+      /*
+       * Abandon if errors are found
+       */
+      if (action == TGZ_INVALID)
+        {
+          error("broken archive");
+          break;
        }
    }

+  /*
+   * Restore file modes and time stamps
+   */
+  restore_attr(&attributes);
+
  if (gzclose(in) != Z_OK)
    error("failed gzclose");

@@ -432,17 +576,17 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
 }


-/* =========================================================== */
+/* ============================================================ */

 void help(int exitval)
 {
-  fprintf(stderr,
-          "untgz version 0.1\n"
-          " a sample application of zlib\n\n"
-          "Usage : untgz file.tgz            to extract all files\n"
-          "        untgz file.tgz fname ...  to extract selected files\n"
-          "        untgz -l file.tgz         to list archive contents\n"
-          "        untgz -h                  to display this help\n\n");
+  printf("untgz version 0.2.1\n"
+         "  using zlib version %s\n\n",
+         zlibVersion());
+  printf("Usage: untgz file.tgz            extract all files\n"
+         "       untgz file.tgz fname ...  extract selected files\n"
+         "       untgz -l file.tgz         list archive contents\n"
+         "       untgz -h                  display this help\n");
  exit(exitval);
 }

@@ -453,9 +597,11 @@ void error(const char *msg)
 }


-/* ====================================================================== */
+/* ============================================================ */

-int _CRT_glob = 0;      /* disable globbing of the arguments */
+#if defined(WIN32) && defined(__GNUC__)
+int _CRT_glob = 0;      /* disable argument globbing in MinGW */
+#endif

 int main(int argc,char **argv)
 {
@@ -464,7 +610,6 @@ int main(int argc,char **argv)
    char        *TGZfile;
    gzFile      *f;

-
    prog = strrchr(argv[0],'\\');
    if (prog == NULL)
      {
@@ -514,16 +659,14 @@ int main(int argc,char **argv)
        f = gzopen(TGZfile,"rb");
        if (f == NULL)
          {
-            fprintf(stderr,"%s: Couldn't gzopen %s\n",
-                    prog,
-                    TGZfile);
+            fprintf(stderr,"%s: Couldn't gzopen %s\n",prog,TGZfile);
            return 1;
          }
        exit(tar(f, action, arg, argc, argv));
      break;

      default:
-        error("Unknown option!");
+        error("Unknown option");
        exit(1);
      }

--- a/contrib/visual-basic.txt
+++ b/contrib/visual-basic.txt
@@ -1,69 +0,0 @@
-See below some functions declarations for Visual Basic.
-
-Frequently Asked Question:
-
-Q: Each time I use the compress function I get the -5 error (not enough
-   room in the output buffer).
-
-A: Make sure that the length of the compressed buffer is passed by
-   reference ("as any"), not by value ("as long"). Also check that
-   before the call of compress this length is equal to the total size of
-   the compressed buffer and not zero.
-
-
-From: "Jon Caruana" <jon-net@usa.net>
-Subject: Re: How to port zlib declares to vb?
-Date: Mon, 28 Oct 1996 18:33:03 -0600
-
-Got the answer! (I haven't had time to check this but it's what I got, and
-looks correct):
-
-He has the following routines working:
-        compress
-        uncompress
-        gzopen
-        gzwrite
-        gzread
-        gzclose
-
-Declares follow: (Quoted from Carlos Rios <c_rios@sonda.cl>, in Vb4 form)
-
-#If Win16 Then   'Use Win16 calls.
-Declare Function compress Lib "ZLIB.DLL" (ByVal compr As
-        String, comprLen As Any, ByVal buf As String, ByVal buflen
-        As Long) As Integer
-Declare Function uncompress Lib "ZLIB.DLL" (ByVal uncompr
-        As String, uncomprLen As Any, ByVal compr As String, ByVal
-        lcompr As Long) As Integer
-Declare Function gzopen Lib "ZLIB.DLL" (ByVal filePath As
-        String, ByVal mode As String) As Long
-Declare Function gzread Lib "ZLIB.DLL" (ByVal file As
-        Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
-        As Integer
-Declare Function gzwrite Lib "ZLIB.DLL" (ByVal file As
-        Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
-        As Integer
-Declare Function gzclose Lib "ZLIB.DLL" (ByVal file As
-        Long) As Integer
-#Else
-Declare Function compress Lib "ZLIB32.DLL"
-        (ByVal compr As String, comprLen As Any, ByVal buf As
-        String, ByVal buflen As Long) As Integer
-Declare Function uncompress Lib "ZLIB32.DLL"
-        (ByVal uncompr As String, uncomprLen As Any, ByVal compr As
-        String, ByVal lcompr As Long) As Long
-Declare Function gzopen Lib "ZLIB32.DLL"
-        (ByVal file As String, ByVal mode As String) As Long
-Declare Function gzread Lib "ZLIB32.DLL"
-        (ByVal file As Long, ByVal uncompr As String, ByVal
-        uncomprLen As Long) As Long
-Declare Function gzwrite Lib "ZLIB32.DLL"
-        (ByVal file As Long, ByVal uncompr As String, ByVal
-        uncomprLen As Long) As Long
-Declare Function gzclose Lib "ZLIB32.DLL"
-        (ByVal file As Long) As Long
-#End If
-
-Jon Caruana
-jon-net@usa.net
-Microsoft Sitebuilder Network Level 1 Member - HTML Writer's Guild Member
--- a/contrib/vstudio/vc7/zlib.rc
+++ b/contrib/vstudio/vc7/zlib.rc
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,2,1,0
-  PRODUCTVERSION 1,2,1,0
+  FILEVERSION	 1,2,2,1
+  PRODUCTVERSION 1,2,2,1
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,7 +17,7 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression library\0"
-      VALUE "FileVersion",	"1.2.1.0\0"
+      VALUE "FileVersion",	"1.2.2.1\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlib.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
--- a/contrib/vstudio/vc7/zlibvc.def
+++ b/contrib/vstudio/vc7/zlibvc.def
@@ -54,6 +54,7 @@ EXPORTS
        gzclearerr                               @48
        gzungetc                                 @49
        zlibCompileFlags                         @50
+        deflatePrime                             @51

        unzOpen                                  @61
        unzClose                                 @62
--- a/crc32.c
+++ b/crc32.c
@@ -1,16 +1,24 @@
 /* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 *
 * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
 * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
 * tables for updating the shift register in one step with three exclusive-ors
- * instead of four steps with four exclusive-ors.  This results about a factor
- * of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
+ * instead of four steps with four exclusive-ors.  This results in about a
+ * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
 */

 /* @(#) $Id$ */

+/*
+  Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
+  protection on the static variables used to control the first-use generation
+  of the crc tables.  Therefore, if you #define DYNAMIC_CRC_TABLE, you should
+  first call get_crc_table() to initialize the tables before allowing more than
+  one thread to use crc32().
+ */
+
 #ifdef MAKECRCH
 #  include <stdio.h>
 #  ifndef DYNAMIC_CRC_TABLE
@@ -58,12 +66,15 @@

 #ifdef DYNAMIC_CRC_TABLE

-local int crc_table_empty = 1;
+local volatile int crc_table_empty = 1;
 local unsigned long FAR crc_table[TBLS][256];
 local void make_crc_table OF((void));
 #ifdef MAKECRCH
   local void write_table OF((FILE *, const unsigned long FAR *));
 #endif /* MAKECRCH */
+local unsigned long gf2_matrix_times OF((unsigned long *mat,
+                                         unsigned long vec));
+local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));

 /*
  Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
@@ -97,8 +108,15 @@ local void make_crc_table()
    int n, k;
    unsigned long poly;                 /* polynomial exclusive-or pattern */
    /* terms of polynomial defining this crc (except x^32): */
+    static volatile int first = 1;      /* flag to limit concurrent making */
    static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};

+    /* See if another task is already doing this (not thread-safe, but better
+       than nothing -- significantly reduces duration of vulnerability in
+       case the advice about DYNAMIC_CRC_TABLE is ignored) */
+    if (first) {
+        first = 0;
+
        /* make exclusive-or pattern from polynomial (0xedb88320UL) */
        poly = 0UL;
        for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
@@ -113,8 +131,8 @@ local void make_crc_table()
        }

 #ifdef BYFOUR
-    /* generate crc for each value followed by one, two, and three zeros, and
-       then the byte reversal of those as well as the first table */
+        /* generate crc for each value followed by one, two, and three zeros,
+           and then the byte reversal of those as well as the first table */
        for (n = 0; n < 256; n++) {
            c = crc_table[0][n];
            crc_table[4][n] = REV(c);
@@ -127,6 +145,12 @@ local void make_crc_table()
 #endif /* BYFOUR */

        crc_table_empty = 0;
+    }
+    else {      /* not first */
+        /* wait for the other guy to finish (not efficient, but rare) */
+        while (crc_table_empty)
+            ;
+    }

 #ifdef MAKECRCH
    /* write out CRC tables to crc32.h */
@@ -180,7 +204,8 @@ local void write_table(out, table)
 const unsigned long FAR * ZEXPORT get_crc_table()
 {
 #ifdef DYNAMIC_CRC_TABLE
-  if (crc_table_empty) make_crc_table();
+    if (crc_table_empty)
+        make_crc_table();
 #endif /* DYNAMIC_CRC_TABLE */
    return (const unsigned long FAR *)crc_table;
 }
@@ -309,3 +334,89 @@ local unsigned long crc32_big(crc, buf, len)
 }

 #endif /* BYFOUR */
+
+#define GF2_DIM 32      /* dimension of GF(2) vectors (length of CRC) */
+
+/* ========================================================================= */
+local unsigned long gf2_matrix_times(mat, vec)
+    unsigned long *mat;
+    unsigned long vec;
+{
+    unsigned long sum;
+
+    sum = 0;
+    while (vec) {
+        if (vec & 1)
+            sum ^= *mat;
+        vec >>= 1;
+        mat++;
+    }
+    return sum;
+}
+
+/* ========================================================================= */
+local void gf2_matrix_square(square, mat)
+    unsigned long *square;
+    unsigned long *mat;
+{
+    int n;
+
+    for (n = 0; n < GF2_DIM; n++)
+        square[n] = gf2_matrix_times(mat, mat[n]);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT crc32_combine(crc1, crc2, len2)
+    uLong crc1;
+    uLong crc2;
+    uLong len2;
+{
+    int n;
+    unsigned long row;
+    unsigned long even[GF2_DIM];    /* even-power-of-two zeros operator */
+    unsigned long odd[GF2_DIM];     /* odd-power-of-two zeros operator */
+
+    /* degenerate case */
+    if (len2 == 0)
+        return crc1;
+
+    /* put operator for one zero bit in odd */
+    odd[0] = 0xedb88320L;           /* CRC-32 polynomial */
+    row = 1;
+    for (n = 1; n < GF2_DIM; n++) {
+        odd[n] = row;
+        row <<= 1;
+    }
+
+    /* put operator for two zero bits in even */
+    gf2_matrix_square(even, odd);
+
+    /* put operator for four zero bits in odd */
+    gf2_matrix_square(odd, even);
+
+    /* apply len2 zeros to crc1 (first square will put the operator for one
+       zero byte, eight zero bits, in even) */
+    do {
+        /* apply zeros operator for this bit of len2 */
+        gf2_matrix_square(even, odd);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(even, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+        if (len2 == 0)
+            break;
+
+        /* another iteration of the loop with odd and even swapped */
+        gf2_matrix_square(odd, even);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(odd, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+    } while (len2 != 0);
+
+    /* return combined crc */
+    crc1 ^= crc2;
+    return crc1;
+}
--- a/deflate.c
+++ b/deflate.c
@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -52,7 +52,7 @@
 #include "deflate.h"

 const char deflate_copyright[] =
-   " deflate 1.2.0.5 Copyright 1995-2003 Jean-loup Gailly ";
+   " deflate 1.2.2.1 Copyright 1995-2004 Jean-loup Gailly ";
 /*
  If you use the zlib library in a product, an acknowledgment is welcome
  in the documentation of your product. If for some reason you cannot
@@ -274,6 +274,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
    s->strm = strm;

    s->wrap = wrap;
+    s->gzhead = Z_NULL;
    s->w_bits = windowBits;
    s->w_size = 1 << s->w_bits;
    s->w_mask = s->w_size - 1;
@@ -390,6 +391,29 @@ int ZEXPORT deflateReset (strm)
    return Z_OK;
 }

+/* ========================================================================= */
+int ZEXPORT deflateSetHeader (strm, head)
+    z_streamp strm;
+    gz_headerp head;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (strm->state->wrap != 2) return Z_STREAM_ERROR;
+    strm->state->gzhead = head;
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflatePrime (strm, bits, value)
+    z_streamp strm;
+    int bits;
+    int value;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    strm->state->bi_valid = bits;
+    strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
+    return Z_OK;
+}
+
 /* ========================================================================= */
 int ZEXPORT deflateParams(strm, level, strategy)
    z_streamp strm;
@@ -536,9 +560,11 @@ int ZEXPORT deflate (strm, flush)
    if (s->status == INIT_STATE) {
 #ifdef GZIP
        if (s->wrap == 2) {
+            strm->adler = crc32(0L, Z_NULL, 0);
            put_byte(s, 31);
            put_byte(s, 139);
            put_byte(s, 8);
+            if (s->gzhead == NULL) {
                put_byte(s, 0);
                put_byte(s, 0);
                put_byte(s, 0);
@@ -549,7 +575,32 @@ int ZEXPORT deflate (strm, flush)
                             4 : 0));
                put_byte(s, 255);
                s->status = BUSY_STATE;
-            strm->adler = crc32(0L, Z_NULL, 0);
+            }
+            else {
+                put_byte(s, (s->gzhead->text ? 1 : 0) +
+                            (s->gzhead->hcrc ? 2 : 0) +
+                            (s->gzhead->extra == Z_NULL ? 0 : 4) +
+                            (s->gzhead->name == Z_NULL ? 0 : 8) +
+                            (s->gzhead->comment == Z_NULL ? 0 : 16)
+                        );
+                put_byte(s, s->gzhead->time & 0xff);
+                put_byte(s, (s->gzhead->time >> 8) & 0xff);
+                put_byte(s, (s->gzhead->time >> 16) & 0xff);
+                put_byte(s, (s->gzhead->time >> 24) & 0xff);
+                put_byte(s, s->level == 9 ? 2 :
+                            (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+                             4 : 0));
+                put_byte(s, s->gzhead->os & 0xff);
+                if (s->gzhead->extra != NULL) {
+                    put_byte(s, s->gzhead->extra_len & 0xff);
+                    put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
+                }
+                if (s->gzhead->hcrc)
+                    strm->adler = crc32(strm->adler, s->pending_buf,
+                                        s->pending);
+                s->gzindex = 0;
+                s->status = EXTRA_STATE;
+            }
        }
        else
 #endif
@@ -580,6 +631,110 @@ int ZEXPORT deflate (strm, flush)
            strm->adler = adler32(0L, Z_NULL, 0);
        }
    }
+#ifdef GZIP
+    if (s->status == EXTRA_STATE) {
+        if (s->gzhead->extra != NULL) {
+            int beg = s->pending;   /* start of bytes to update crc */
+
+            while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size)
+                        break;
+                }
+                put_byte(s, s->gzhead->extra[s->gzindex]);
+                s->gzindex++;
+            }
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (s->gzindex == s->gzhead->extra_len) {
+                s->gzindex = 0;
+                s->status = NAME_STATE;
+            }
+        }
+        else
+            s->status = NAME_STATE;
+    }
+    if (s->status == NAME_STATE) {
+        if (s->gzhead->name != NULL) {
+            int beg = s->pending;   /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->name[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0) {
+                s->gzindex = 0;
+                s->status = COMMENT_STATE;
+            }
+        }
+        else
+            s->status = COMMENT_STATE;
+    }
+    if (s->status == COMMENT_STATE) {
+        if (s->gzhead->comment != NULL) {
+            int beg = s->pending;   /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->comment[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0)
+                s->status = HCRC_STATE;
+        }
+        else
+            s->status = HCRC_STATE;
+    }
+    if (s->status == HCRC_STATE) {
+        if (s->gzhead->hcrc) {
+            if (s->pending + 2 > s->pending_buf_size)
+                flush_pending(strm);
+            if (s->pending + 2 <= s->pending_buf_size) {
+                put_byte(s, strm->adler & 0xff);
+                put_byte(s, (strm->adler >> 8) & 0xff);
+                strm->adler = crc32(0L, Z_NULL, 0);
+                s->status = BUSY_STATE;
+            }
+        }
+        else
+            s->status = BUSY_STATE;
+    }
+#endif

    /* Flush as much pending output as possible */
    if (s->pending != 0) {
@@ -692,7 +847,12 @@ int ZEXPORT deflateEnd (strm)
    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;

    status = strm->state->status;
-    if (status != INIT_STATE && status != BUSY_STATE &&
+    if (status != INIT_STATE &&
+        status != EXTRA_STATE &&
+        status != NAME_STATE &&
+        status != COMMENT_STATE &&
+        status != HCRC_STATE &&
+        status != BUSY_STATE &&
        status != FINISH_STATE) {
      return Z_STREAM_ERROR;
    }
--- a/deflate.h
+++ b/deflate.h
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2002 Jean-loup Gailly
+ * Copyright (C) 1995-2004 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -49,6 +49,10 @@
 /* All codes must not exceed MAX_BITS bits */

 #define INIT_STATE    42
+#define EXTRA_STATE   69
+#define NAME_STATE    73
+#define COMMENT_STATE 91
+#define HCRC_STATE   103
 #define BUSY_STATE   113
 #define FINISH_STATE 666
 /* Stream status */
@@ -95,7 +99,8 @@ typedef struct internal_state {
    Bytef *pending_out;  /* next pending byte to output to the stream */
    int   pending;       /* nb of bytes in the pending buffer */
    int   wrap;          /* bit 0 true for zlib, bit 1 true for gzip */
-    Byte  data_type;     /* UNKNOWN, BINARY or ASCII */
+    gz_headerp  gzhead;  /* gzip header information to write */
+    int   gzindex;       /* where in extra, name, or comment */
    Byte  method;        /* STORED (for zip only) or DEFLATED */
    int   last_flush;    /* value of flush param for previous deflate call */

--- a/example.c
+++ b/example.c
@@ -1,5 +1,5 @@
 /* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -11,8 +11,6 @@
 #ifdef STDC
 #  include <string.h>
 #  include <stdlib.h>
-#else
-   extern void exit  OF((int));
 #endif

 #if defined(VMS) || defined(RISCOS)
@@ -89,6 +87,9 @@ void test_gzio(fname, uncompr, uncomprLen)
    Byte *uncompr;
    uLong uncomprLen;
 {
+#ifdef NO_GZCOMPRESS
+    fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
+#else
    int err;
    int len = (int)strlen(hello)+1;
    gzFile file;
@@ -159,6 +160,7 @@ void test_gzio(fname, uncompr, uncomprLen)
    }

    gzclose(file);
+#endif
 }

 /* ===========================================================================
--- a/gzio.c
+++ b/gzio.c
@@ -1,5 +1,5 @@
 /* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 *
 * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
@@ -11,7 +11,7 @@

 #include "zutil.h"

-#ifdef NO_DEFLATE       /* for compatiblity with old definition */
+#ifdef NO_DEFLATE       /* for compatibility with old definition */
 #  define NO_GZCOMPRESS
 #endif

@@ -30,6 +30,11 @@ struct internal_state {int dummy;}; /* for buggy compilers */
 #  define Z_PRINTF_BUFSIZE 4096
 #endif

+#ifdef __MVS__
+#  pragma map (fdopen , "\174\174FDOPEN")
+   FILE *fdopen(int, const char *);
+#endif
+
 #ifndef STDC
 extern voidp  malloc OF((uInt size));
 extern void   free   OF((voidpf ptr));
@@ -450,6 +455,10 @@ int ZEXPORT gzread (file, buf, len)
                    s->z_err = Z_ERRNO;
                    break;
                }
+                if (feof(s->file)) {        /* avoid error for empty file */
+                    s->z_err = Z_STREAM_END;
+                    break;
+                }
            }
            s->stream.next_in = s->inbuf;
        }
@@ -884,7 +893,13 @@ int ZEXPORT gzeof (file)
 {
    gz_stream *s = (gz_stream*)file;

-    return (s == NULL || s->mode != 'r') ? 0 : s->z_eof;
+    /* With concatenated compressed files that can have embedded
+     * crc trailers, z_eof is no longer the only/best indicator of EOF
+     * on a gz_stream. Handle end-of-stream error explicitly here.
+     */
+    if (s == NULL || s->mode != 'r') return 0;
+    if (s->z_eof) return 1;
+    return s->z_err == Z_STREAM_END;
 }

 /* ===========================================================================
@@ -926,7 +941,6 @@ local uLong getLong (s)
 int ZEXPORT gzclose (file)
    gzFile file;
 {
-    int err;
    gz_stream *s = (gz_stream*)file;

    if (s == NULL) return Z_STREAM_ERROR;
@@ -935,8 +949,8 @@ int ZEXPORT gzclose (file)
 #ifdef NO_GZCOMPRESS
        return Z_STREAM_ERROR;
 #else
-        err = do_flush (file, Z_FINISH);
-        if (err != Z_OK) return destroy((gz_stream*)file);
+        if (do_flush (file, Z_FINISH) != Z_OK)
+            return destroy((gz_stream*)file);

        putLong (s->file, s->crc);
        putLong (s->file, (uLong)(s->in & 0xffffffff));
--- a/infback.c
+++ b/infback.c
@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -26,7 +26,7 @@ local void fixedtables OF((struct inflate_state FAR *state));
   window and output buffer that is 2**windowBits bytes.
 */
 int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
-z_stream FAR *strm;
+z_streamp strm;
 int windowBits;
 unsigned char FAR *window;
 const char *version;
@@ -238,7 +238,7 @@ struct inflate_state FAR *state;
   are not correct, i.e. strm is Z_NULL or the state was not initialized.
 */
 int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
-z_stream FAR *strm;
+z_streamp strm;
 in_func in;
 void FAR *in_desc;
 out_func out;
@@ -434,6 +434,9 @@ void FAR *out_desc;
                }
            }

+            /* handle error breaks in while */
+            if (state->mode == BAD) break;
+
            /* build code tables */
            state->next = state->codes;
            state->lencode = (code const FAR *)(state->next);
@@ -608,7 +611,7 @@ void FAR *out_desc;
 }

 int ZEXPORT inflateBackEnd(strm)
-z_stream FAR *strm;
+z_streamp strm;
 {
    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
        return Z_STREAM_ERROR;
--- a/inffast.c
+++ b/inffast.c
@@ -1,5 +1,5 @@
 /* inffast.c -- fast decoding
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -19,6 +19,7 @@
   - none
   No measurable difference:
   - Pentium III (Anderson)
+   - M68060 (Nikl)
 */
 #ifdef POSTINC
 #  define OFF 0
--- a/inflate.c
+++ b/inflate.c
@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -109,9 +109,11 @@ z_streamp strm;
    state = (struct inflate_state FAR *)strm->state;
    strm->total_in = strm->total_out = state->total = 0;
    strm->msg = Z_NULL;
+    strm->adler = 1;        /* to support ill-conceived Java test suite */
    state->mode = HEAD;
    state->last = 0;
    state->havedict = 0;
+    state->head = Z_NULL;
    state->wsize = 0;
    state->whave = 0;
    state->hold = 0;
@@ -568,7 +570,7 @@ int flush;
        switch (state->mode) {
        case HEAD:
            if (state->wrap == 0) {
-                state->mode = TYPE;
+                state->mode = TYPEDO;
                break;
            }
            NEEDBITS(16);
@@ -581,6 +583,8 @@ int flush;
                break;
            }
            state->flags = 0;           /* expect zlib header */
+            if (state->head != Z_NULL)
+                state->head->done = -1;
            if (!(state->wrap & 1) ||   /* check if zlib header allowed */
 #else
            if (
@@ -620,16 +624,24 @@ int flush;
                state->mode = BAD;
                break;
            }
+            if (state->head != Z_NULL)
+                state->head->text = (int)((hold >> 8) & 1);
            if (state->flags & 0x0200) CRC2(state->check, hold);
            INITBITS();
            state->mode = TIME;
        case TIME:
            NEEDBITS(32);
+            if (state->head != Z_NULL)
+                state->head->time = hold;
            if (state->flags & 0x0200) CRC4(state->check, hold);
            INITBITS();
            state->mode = OS;
        case OS:
            NEEDBITS(16);
+            if (state->head != Z_NULL) {
+                state->head->xflags = (int)(hold & 0xff);
+                state->head->os = (int)(hold >> 8);
+            }
            if (state->flags & 0x0200) CRC2(state->check, hold);
            INITBITS();
            state->mode = EXLEN;
@@ -637,15 +649,26 @@ int flush;
            if (state->flags & 0x0400) {
                NEEDBITS(16);
                state->length = (unsigned)(hold);
+                if (state->head != Z_NULL)
+                    state->head->extra_len = (unsigned)hold;
                if (state->flags & 0x0200) CRC2(state->check, hold);
                INITBITS();
            }
+            else if (state->head != Z_NULL)
+                state->head->extra = Z_NULL;
            state->mode = EXTRA;
        case EXTRA:
            if (state->flags & 0x0400) {
                copy = state->length;
                if (copy > have) copy = have;
                if (copy) {
+                    if (state->head != Z_NULL &&
+                        state->head->extra != Z_NULL) {
+                        len = state->head->extra_len - state->length;
+                        zmemcpy(state->head->extra + len, next,
+                                len + copy > state->head->extra_max ?
+                                state->head->extra_max - len : copy);
+                    }
                    if (state->flags & 0x0200)
                        state->check = crc32(state->check, next, copy);
                    have -= copy;
@@ -654,6 +677,7 @@ int flush;
                }
                if (state->length) goto inf_leave;
            }
+            state->length = 0;
            state->mode = NAME;
        case NAME:
            if (state->flags & 0x0800) {
@@ -661,13 +685,20 @@ int flush;
                copy = 0;
                do {
                    len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->name != Z_NULL &&
+                            state->length < state->head->name_max)
+                        state->head->name[state->length++] = len;
                } while (len && copy < have);
-                if (state->flags & 0x02000)
+                if (state->flags & 0x0200)
                    state->check = crc32(state->check, next, copy);
                have -= copy;
                next += copy;
                if (len) goto inf_leave;
            }
+            else if (state->head != Z_NULL)
+                state->head->name = Z_NULL;
+            state->length = 0;
            state->mode = COMMENT;
        case COMMENT:
            if (state->flags & 0x1000) {
@@ -675,13 +706,19 @@ int flush;
                copy = 0;
                do {
                    len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->comment != Z_NULL &&
+                            state->length < state->head->comm_max)
+                        state->head->comment[state->length++] = len;
                } while (len && copy < have);
-                if (state->flags & 0x02000)
+                if (state->flags & 0x0200)
                    state->check = crc32(state->check, next, copy);
                have -= copy;
                next += copy;
                if (len) goto inf_leave;
            }
+            else if (state->head != Z_NULL)
+                state->head->comment = Z_NULL;
            state->mode = HCRC;
        case HCRC:
            if (state->flags & 0x0200) {
@@ -693,6 +730,10 @@ int flush;
                }
                INITBITS();
            }
+            if (state->head != Z_NULL) {
+                state->head->hcrc = (int)((state->flags >> 9) & 1);
+                state->head->done = 1;
+            }
            strm->adler = state->check = crc32(0L, Z_NULL, 0);
            state->mode = TYPE;
            break;
@@ -861,6 +902,9 @@ int flush;
                }
            }

+            /* handle error breaks in while */
+            if (state->mode == BAD) break;
+
            /* build code tables */
            state->next = state->codes;
            state->lencode = (code const FAR *)(state->next);
@@ -1074,8 +1118,8 @@ int flush;
    if (state->wrap && out)
        strm->adler = state->check =
            UPDATE(state->check, strm->next_out - out, out);
-    strm->data_type = state->bits + (state->last ? 8 : 0) +
-                      (state->mode == TYPE ? 16 : 0);
+    strm->data_type = state->bits + (state->last ? 64 : 0) +
+                      (state->mode == TYPE ? 128 : 0);
    if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
        ret = Z_BUF_ERROR;
    return ret;
@@ -1106,12 +1150,16 @@ uInt dictLength;
    /* check state */
    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
-    if (state->mode != DICT) return Z_STREAM_ERROR;
+    if (state->wrap != 0 && state->mode != DICT)
+        return Z_STREAM_ERROR;

    /* check for correct dictionary id */
+    if (state->mode == DICT) {
        id = adler32(0L, Z_NULL, 0);
        id = adler32(id, dictionary, dictLength);
-    if (id != state->check) return Z_DATA_ERROR;
+        if (id != state->check)
+            return Z_DATA_ERROR;
+    }

    /* copy dictionary to window */
    if (updatewindow(strm, strm->avail_out)) {
@@ -1133,6 +1181,23 @@ uInt dictLength;
    return Z_OK;
 }

+int ZEXPORT inflateGetHeader(strm, head)
+z_streamp strm;
+gz_headerp head;
+{
+    struct inflate_state FAR *state;
+
+    /* check state */
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
+
+    /* save header structure */
+    state->head = head;
+    head->done = 0;
+    return Z_OK;
+}
+
 /*
   Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff.  Return when found
   or when out of input.  When called, *have is the number of pattern bytes
--- a/inflate.h
+++ b/inflate.h
@@ -1,5 +1,5 @@
 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -19,7 +19,6 @@
 /* Possible inflate modes between inflate() calls */
 typedef enum {
    HEAD,       /* i: waiting for magic header */
-#ifdef GUNZIP
    FLAGS,      /* i: waiting for method and flags (gzip) */
    TIME,       /* i: waiting for modification time (gzip) */
    OS,         /* i: waiting for extra flags and operating system (gzip) */
@@ -28,7 +27,6 @@ typedef enum {
    NAME,       /* i: waiting for end of file name (gzip) */
    COMMENT,    /* i: waiting for end of comment (gzip) */
    HCRC,       /* i: waiting for header crc (gzip) */
-#endif
    DICTID,     /* i: waiting for dictionary check value */
    DICT,       /* waiting for inflateSetDictionary() call */
        TYPE,       /* i: waiting for type bits, including last-flag bit */
@@ -45,9 +43,7 @@ typedef enum {
            MATCH,      /* o: waiting for output space to copy string */
            LIT,        /* o: waiting for output space to write literal */
    CHECK,      /* i: waiting for 32-bit check value */
-#ifdef GUNZIP
    LENGTH,     /* i: waiting for 32-bit length (gzip) */
-#endif
    DONE,       /* finished check, done -- remain here until reset */
    BAD,        /* got a data error -- remain here until reset */
    MEM,        /* got an inflate() memory error -- remain here until reset */
@@ -86,6 +82,7 @@ struct inflate_state {
    int flags;                  /* gzip header method and flags (0 if zlib) */
    unsigned long check;        /* protected copy of check value */
    unsigned long total;        /* protected copy of output count */
+    gz_headerp head;            /* where to save gzip header information */
        /* sliding window */
    unsigned wbits;             /* log base 2 of requested window size */
    unsigned wsize;             /* window size or zero if not using window */
--- a/inftrees.c
+++ b/inftrees.c
@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -9,7 +9,7 @@
 #define MAXBITS 15

 const char inflate_copyright[] =
-   " inflate 1.2.0.5 Copyright 1995-2003 Mark Adler ";
+   " inflate 1.2.2.1 Copyright 1995-2004 Mark Adler ";
 /*
  If you use the zlib library in a product, an acknowledgment is welcome
  in the documentation of your product. If for some reason you cannot
@@ -62,7 +62,7 @@ unsigned short FAR *work;
        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
        16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 192, 78};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 207};
    static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
@@ -114,7 +114,15 @@ unsigned short FAR *work;
    for (max = MAXBITS; max >= 1; max--)
        if (count[max] != 0) break;
    if (root > max) root = max;
-    if (max == 0) return -1;            /* no codes! */
+    if (max == 0) {                     /* no symbols to code at all */
+        this.op = (unsigned char)64;    /* invalid code marker */
+        this.bits = (unsigned char)1;
+        this.val = (unsigned short)0;
+        *(*table)++ = this;             /* make a table to force an error */
+        *(*table)++ = this;
+        *bits = 1;
+        return 0;     /* no symbols, but wait for decoding to report error */
+    }
    for (min = 1; min <= MAXBITS; min++)
        if (count[min] != 0) break;
    if (root < min) root = min;
@@ -295,7 +303,6 @@ unsigned short FAR *work;
            drop = 0;
            len = root;
            next = *table;
-            curr = root;
            this.bits = (unsigned char)len;
        }

--- a/minigzip.c
+++ b/minigzip.c
@@ -1,5 +1,5 @@
 /* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -21,8 +21,6 @@
 #ifdef STDC
 #  include <string.h>
 #  include <stdlib.h>
-#else
-   extern void exit  OF((int));
 #endif

 #ifdef USE_MMAP
@@ -31,7 +29,7 @@
 #  include <sys/stat.h>
 #endif

-#if defined(MSDOS) || defined(OS2) || defined(WIN32)
+#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
 #  include <fcntl.h>
 #  include <io.h>
 #  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
--- a/old/README
+++ b/old/README
@@ -1,3 +1,3 @@
-This directory contains files that have not been updated for zlib 1.2.0.
+This directory contains files that have not been updated for zlib 1.2.x

 (Volunteers are encouraged to help clean this up.  Thanks.)
--- a/old/amiga/Makefile.pup
+++ b/old/amiga/Makefile.pup
@@ -1,66 +0,0 @@
-# Amiga powerUP (TM) Makefile
-# makefile for libpng and SAS C V6.58/7.00 PPC compiler
-# Copyright (C) 1998 by Andreas R. Kleinert
-
-CC       = scppc
-CFLAGS   = NOSTKCHK NOSINT OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL \
-           OPTLOOP OPTRDEP=8 OPTDEP=8 OPTCOMP=8
-LIBNAME  = libzip.a
-AR       = ppc-amigaos-ar
-AR_FLAGS = cr
-RANLIB   = ppc-amigaos-ranlib
-LDFLAGS  = -r -o
-LDLIBS   = LIB:scppc.a
-LN       = ppc-amigaos-ld
-RM       = delete quiet
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
-       zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example minigzip
-
-test: all
-        example
-        echo hello world | minigzip | minigzip -d
-
-$(LIBNAME): $(OBJS)
-            $(AR) $(AR_FLAGS) $@ $(OBJS)
-            $(RANLIB) $@
-
-example: example.o $(LIBNAME)
-        $(LN) $(LDFLAGS) example LIB:c_ppc.o example.o $(LIBNAME) $(LDLIBS) LIB:end.o
-
-minigzip: minigzip.o $(LIBNAME)
-        $(LN) $(LDFLAGS) minigzip LIB:c_ppc.o minigzip.o $(LIBNAME) $(LDLIBS) LIB:end.o
-
-clean:
-        $(RM) *.o example minigzip $(LIBNAME) foo.gz
-
-zip:
-        zip -ul9 zlib README ChangeLog Makefile Make????.??? Makefile.?? \
-          descrip.mms *.[ch]
-
-tgz:
-        cd ..; tar cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile \
-          zlib/Make????.??? zlib/Makefile.?? zlib/descrip.mms zlib/*.[ch]
-
-# DO NOT DELETE THIS LINE -- make depend depends on it.
-
-adler32.o: zutil.h zlib.h zconf.h
-compress.o: zlib.h zconf.h
-crc32.o: zutil.h zlib.h zconf.h
-deflate.o: deflate.h zutil.h zlib.h zconf.h
-example.o: zlib.h zconf.h
-gzio.o: zutil.h zlib.h zconf.h
-infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
-infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
-inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
-minigzip.o: zlib.h zconf.h
-trees.o: deflate.h zutil.h zlib.h zconf.h
-uncompr.o: zlib.h zconf.h
-zutil.o: zutil.h zlib.h zconf.h
--- a/old/msdos/Makefile.b32
+++ b/old/msdos/Makefile.b32
@@ -1,104 +0,0 @@
-# Makefile for zlib
-# Borland C++
-
-# This version of the zlib makefile was adapted by Chris Young for use
-# with Borland C 4.5x with the Dos Power Pack for a 32-bit protected mode
-# flat memory model.  It was created for use with POV-Ray ray tracer and
-# you may choose to edit the CFLAGS to suit your needs but the
-# switches -WX and -DMSDOS are required.
-# -- Chris Young 76702.1655@compuserve.com
-
-# To use, do "make -fmakefile.b32"
-
-# See zconf.h for details about the memory requirements.
-
-# ------------- Borland C++ -------------
-MODEL=-WX
-CFLAGS= $(MODEL) -P-C -K -N- -k- -d -3 -r- -v- -f -DMSDOS
-CC=bcc32
-LD=bcc32
-LIB=tlib
-LDFLAGS= $(MODEL)
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
-  trees$(O)
-OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
-  trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
-  infutil$(O) inffast$(O)
-OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
-  infutil$(O)+inffast$(O)
-
-all: test
-
-adler32.obj: adler32.c zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-compress.obj: compress.c zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-crc32.obj: crc32.c zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
-   infcodes.h infutil.h
-	$(CC) -c $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
-   infcodes.h inffast.h
-	$(CC) -c $(CFLAGS) $*.c
-
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
-	$(CC) -c $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
-	$(CC) -c $(CFLAGS) $*.c
-
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
-	$(CC) -c $(CFLAGS) $*.c
-
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-	$(CC) -c $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-example.obj: example.c zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c zlib.h zconf.h
-	$(CC) -c $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-zlib.lib: $(OBJ1) $(OBJ2)
-	del zlib.lib
-	$(LIB) zlib +$(OBJP1)
-	$(LIB) zlib +$(OBJP2)
-
-example.exe: example.obj zlib.lib
-	$(LD) $(LDFLAGS) example.obj zlib.lib
-
-minigzip.exe: minigzip.obj zlib.lib
-	$(LD) $(LDFLAGS) minigzip.obj zlib.lib
-
-test: example.exe minigzip.exe
-	example
-	echo hello world | minigzip | minigzip -d
-
-#clean:
-#	del *.obj
-#	del *.exe
--- a/old/msdos/Makefile.wat
+++ b/old/msdos/Makefile.wat
@@ -1,103 +0,0 @@
-# Makefile for zlib
-# Watcom 10a
-
-# This version of the zlib makefile was adapted by Chris Young for use
-# with Watcom 10a 32-bit protected mode flat memory model.  It was created
-# for use with POV-Ray ray tracer and you may choose to edit the CFLAGS to
-# suit your needs but the -DMSDOS is required.
-# -- Chris Young 76702.1655@compuserve.com
-
-# To use, do "wmake -f makefile.wat"
-
-# See zconf.h for details about the memory requirements.
-
-# ------------- Watcom 10a -------------
-MODEL=-mf
-CFLAGS= $(MODEL) -fpi87 -fp5 -zp4 -5r -w5 -oneatx -DMSDOS
-CC=wcc386
-LD=wcl386
-LIB=wlib -b -c
-LDFLAGS=
-O=.obj
-
-# variables
-OBJ1=adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O)
-OBJ2=trees$(O) zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O)
-OBJ3=infutil$(O) inffast$(O)
-OBJP1=adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)
-OBJP2=trees$(O)+zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)
-OBJP3=infutil$(O)+inffast$(O)
-
-all: test
-
-adler32.obj: adler32.c zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-compress.obj: compress.c zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-crc32.obj: crc32.c zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h &
-  infcodes.h infutil.h
-	$(CC) $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h &
-  infcodes.h inffast.h
-	$(CC) $(CFLAGS) $*.c
-
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
-	$(CC) $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
-	$(CC) $(CFLAGS) $*.c
-
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
-	$(CC) $(CFLAGS) $*.c
-
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-	$(CC) $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-example.obj: example.c zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c zlib.h zconf.h
-	$(CC) $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-zlib.lib: $(OBJ1) $(OBJ2) $(OBJ3)
-	del zlib.lib
-	$(LIB) zlib.lib +$(OBJP1)
-	$(LIB) zlib.lib +$(OBJP2)
-	$(LIB) zlib.lib +$(OBJP3)
-
-example.exe: example.obj zlib.lib
-	$(LD) $(LDFLAGS) example.obj zlib.lib
-
-minigzip.exe: minigzip.obj zlib.lib
-	$(LD) $(LDFLAGS) minigzip.obj zlib.lib
-
-test: minigzip.exe example.exe
-	example
-	echo hello world | minigzip | minigzip -d >test
-	type test
-
-#clean:
-#	del *.obj
-#	del *.exe
--- a/old/visual-basic.txt
+++ b/old/visual-basic.txt
@@ -0,0 +1,160 @@
+See below some functions declarations for Visual Basic.
+
+Frequently Asked Question:
+
+Q: Each time I use the compress function I get the -5 error (not enough
+   room in the output buffer).
+
+A: Make sure that the length of the compressed buffer is passed by
+   reference ("as any"), not by value ("as long"). Also check that
+   before the call of compress this length is equal to the total size of
+   the compressed buffer and not zero.
+
+
+From: "Jon Caruana" <jon-net@usa.net>
+Subject: Re: How to port zlib declares to vb?
+Date: Mon, 28 Oct 1996 18:33:03 -0600
+
+Got the answer! (I haven't had time to check this but it's what I got, and
+looks correct):
+
+He has the following routines working:
+        compress
+        uncompress
+        gzopen
+        gzwrite
+        gzread
+        gzclose
+
+Declares follow: (Quoted from Carlos Rios <c_rios@sonda.cl>, in Vb4 form)
+
+#If Win16 Then   'Use Win16 calls.
+Declare Function compress Lib "ZLIB.DLL" (ByVal compr As
+        String, comprLen As Any, ByVal buf As String, ByVal buflen
+        As Long) As Integer
+Declare Function uncompress Lib "ZLIB.DLL" (ByVal uncompr
+        As String, uncomprLen As Any, ByVal compr As String, ByVal
+        lcompr As Long) As Integer
+Declare Function gzopen Lib "ZLIB.DLL" (ByVal filePath As
+        String, ByVal mode As String) As Long
+Declare Function gzread Lib "ZLIB.DLL" (ByVal file As
+        Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
+        As Integer
+Declare Function gzwrite Lib "ZLIB.DLL" (ByVal file As
+        Long, ByVal uncompr As String, ByVal uncomprLen As Integer)
+        As Integer
+Declare Function gzclose Lib "ZLIB.DLL" (ByVal file As
+        Long) As Integer
+#Else
+Declare Function compress Lib "ZLIB32.DLL"
+        (ByVal compr As String, comprLen As Any, ByVal buf As
+        String, ByVal buflen As Long) As Integer
+Declare Function uncompress Lib "ZLIB32.DLL"
+        (ByVal uncompr As String, uncomprLen As Any, ByVal compr As
+        String, ByVal lcompr As Long) As Long
+Declare Function gzopen Lib "ZLIB32.DLL"
+        (ByVal file As String, ByVal mode As String) As Long
+Declare Function gzread Lib "ZLIB32.DLL"
+        (ByVal file As Long, ByVal uncompr As String, ByVal
+        uncomprLen As Long) As Long
+Declare Function gzwrite Lib "ZLIB32.DLL"
+        (ByVal file As Long, ByVal uncompr As String, ByVal
+        uncomprLen As Long) As Long
+Declare Function gzclose Lib "ZLIB32.DLL"
+        (ByVal file As Long) As Long
+#End If
+
+-Jon Caruana
+jon-net@usa.net
+Microsoft Sitebuilder Network Level 1 Member - HTML Writer's Guild Member
+
+
+Here is another example from Michael <michael_borgsys@hotmail.com> that he
+says conforms to the VB guidelines, and that solves the problem of not
+knowing the uncompressed size by storing it at the end of the file:
+
+'Calling the functions:
+'bracket meaning: <parameter> [optional] {Range of possible values}
+'Call subCompressFile(<path with filename to compress> [, <path with
+filename to write to>, [level of compression {1..9}]])
+'Call subUncompressFile(<path with filename to compress>)
+
+Option Explicit
+Private lngpvtPcnSml As Long 'Stores value for 'lngPercentSmaller'
+Private Const SUCCESS As Long = 0
+Private Const strFilExt As String = ".cpr"
+Private Declare Function lngfncCpr Lib "zlib.dll" Alias "compress2" (ByRef
+dest As Any, ByRef destLen As Any, ByRef src As Any, ByVal srcLen As Long,
+ByVal level As Integer) As Long
+Private Declare Function lngfncUcp Lib "zlib.dll" Alias "uncompress" (ByRef
+dest As Any, ByRef destLen As Any, ByRef src As Any, ByVal srcLen As Long)
+As Long
+
+Public Sub subCompressFile(ByVal strargOriFilPth As String, Optional ByVal
+strargCprFilPth As String, Optional ByVal intLvl As Integer = 9)
+    Dim strCprPth As String
+    Dim lngOriSiz As Long
+    Dim lngCprSiz As Long
+    Dim bytaryOri() As Byte
+    Dim bytaryCpr() As Byte
+    lngOriSiz = FileLen(strargOriFilPth)
+    ReDim bytaryOri(lngOriSiz - 1)
+    Open strargOriFilPth For Binary Access Read As #1
+        Get #1, , bytaryOri()
+    Close #1
+    strCprPth = IIf(strargCprFilPth = "", strargOriFilPth, strargCprFilPth)
+'Select file path and name
+    strCprPth = strCprPth & IIf(Right(strCprPth, Len(strFilExt)) =
+strFilExt, "", strFilExt) 'Add file extension if not exists
+    lngCprSiz = (lngOriSiz * 1.01) + 12 'Compression needs temporary a bit
+more space then original file size
+    ReDim bytaryCpr(lngCprSiz - 1)
+    If lngfncCpr(bytaryCpr(0), lngCprSiz, bytaryOri(0), lngOriSiz, intLvl) =
+SUCCESS Then
+        lngpvtPcnSml = (1# - (lngCprSiz / lngOriSiz)) * 100
+        ReDim Preserve bytaryCpr(lngCprSiz - 1)
+        Open strCprPth For Binary Access Write As #1
+            Put #1, , bytaryCpr()
+            Put #1, , lngOriSiz 'Add the the original size value to the end
+(last 4 bytes)
+        Close #1
+    Else
+        MsgBox "Compression error"
+    End If
+    Erase bytaryCpr
+    Erase bytaryOri
+End Sub
+
+Public Sub subUncompressFile(ByVal strargFilPth As String)
+    Dim bytaryCpr() As Byte
+    Dim bytaryOri() As Byte
+    Dim lngOriSiz As Long
+    Dim lngCprSiz As Long
+    Dim strOriPth As String
+    lngCprSiz = FileLen(strargFilPth)
+    ReDim bytaryCpr(lngCprSiz - 1)
+    Open strargFilPth For Binary Access Read As #1
+        Get #1, , bytaryCpr()
+    Close #1
+    'Read the original file size value:
+    lngOriSiz = bytaryCpr(lngCprSiz - 1) * (2 ^ 24) _
+              + bytaryCpr(lngCprSiz - 2) * (2 ^ 16) _
+              + bytaryCpr(lngCprSiz - 3) * (2 ^ 8) _
+              + bytaryCpr(lngCprSiz - 4)
+    ReDim Preserve bytaryCpr(lngCprSiz - 5) 'Cut of the original size value
+    ReDim bytaryOri(lngOriSiz - 1)
+    If lngfncUcp(bytaryOri(0), lngOriSiz, bytaryCpr(0), lngCprSiz) = SUCCESS
+Then
+        strOriPth = Left(strargFilPth, Len(strargFilPth) - Len(strFilExt))
+        Open strOriPth For Binary Access Write As #1
+            Put #1, , bytaryOri()
+        Close #1
+    Else
+        MsgBox "Uncompression error"
+    End If
+    Erase bytaryCpr
+    Erase bytaryOri
+End Sub
+Public Property Get lngPercentSmaller() As Long
+    lngPercentSmaller = lngpvtPcnSml
+End Property
--- a/projects/README.projects
+++ b/projects/README.projects
@@ -0,0 +1,41 @@
+This directory contains project files for building zlib under various
+Integrated Development Environments (IDE).
+
+If you wish to submit a new project to this directory, you should comply
+to the following requirements.  Otherwise (e.g. if you wish to integrate
+a custom piece of code that changes the zlib interface or its behavior),
+please consider submitting the project to the contrib directory.
+
+
+Requirements
+============
+
+- The project must build zlib using the source files from the official
+  zlib source distribution, exclusively.
+
+- If the project produces redistributable builds (e.g. shared objects
+  or DLL files), these builds must be compatible to those produced by
+  makefiles, if such makefiles exist in the zlib distribution.
+  In particular, if the project produces a DLL build for the Win32
+  platform, this build must comply to the officially-ammended Win32 DLL
+  Application Binary Interface (ABI), described in win32/DLL_FAQ.txt.
+
+- The project may provide additional build targets, which depend on
+  3rd-party (unofficially-supported) software, present in the contrib
+  directory.  For example, it is possible to provide an "ASM build",
+  besides the officially-supported build, and have ASM source files
+  among its dependencies.
+
+- If there are significant differences between the project files created
+  by different versions of an IDE (e.g. Visual C++ 6.0 vs. 7.0), the name
+  of the project directory should contain the version number of the IDE
+  for which the project is intended (e.g. "visualc6" for Visual C++ 6.0,
+  or "visualc7" for Visual C++ 7.0 and 7.1).
+
+
+Current projects
+================
+
+visualc6/   by Simon-Pierre Cadieux <methodex@methodex.ca>
+            and Cosmin Truta <cosmint@cs.ubbcluj.ro>
+        Project for Microsoft Visual C++ 6.0
--- a/projects/visualc6/README.txt
+++ b/projects/visualc6/README.txt
@@ -0,0 +1,73 @@
+Microsoft Developer Studio Project Files, Format Version 6.00 for zlib.
+
+Copyright (C) 2000-2004 Simon-Pierre Cadieux.
+Copyright (C) 2004 Cosmin Truta.
+For conditions of distribution and use, see copyright notice in zlib.h.
+
+
+This project builds the zlib binaries as follows:
+
+* Win32_DLL_Release\zlib1.dll       DLL build
+* Win32_DLL_Debug\zlib1d.dll        DLL build (debug version)
+* Win32_DLL_ASM_Release\zlib1.dll   DLL build using ASM code
+* Win32_DLL_ASM_Debug\zlib1d.dll    DLL build using ASM code (debug version)
+* Win32_LIB_Release\zlib.lib        static build
+* Win32_LIB_Debug\zlibd.lib         static build (debug version)
+* Win32_LIB_ASM_Release\zlib.lib    static build using ASM code
+* Win32_LIB_ASM_Debug\zlibd.lib     static build using ASM code (debug version)
+
+
+For more information regarding the DLL builds, please see the DLL FAQ
+in ..\..\win32\DLL_FAQ.txt.
+
+
+To build and test:
+
+1) On the main menu, select "File | Open Workspace".
+   Open "zlib.dsw".
+
+2) Select "Build | Set Active Configuration".
+   Choose the configuration you wish to build.
+
+3) Select "Build | Clean".
+
+4) Select "Build | Build ... (F7)".  Ignore warning messages about
+   not being able to find certain include files (e.g. alloc.h).
+
+5) If you built one of the sample programs (example or minigzip),
+   select "Build | Execute ... (Ctrl+F5)".
+
+
+To use:
+
+1) Select "Project | Settings (Alt+F7)".
+   Make note of the configuration names used in your project.
+   Usually, these names are "Win32 Release" and "Win32 Debug".
+
+2) In the Workspace window, select the "FileView" tab.
+   Right-click on the root item "Workspace '...'".
+   Select "Insert Project into Workspace".
+   Switch on the checkbox "Dependency of:", and select the name
+   of your project.  Open "zlib.dsp".
+
+3) Select "Build | Configurations".
+   For each configuration of your project:
+   3.1) Choose the zlib configuration you wish to use.
+   3.2) Click on "Add".
+   3.3) Set the new zlib configuration name to the name used by
+        the configuration from the current iteration.
+
+4) Select "Build | Set Active Configuration".
+   Choose the configuration you wish to build.
+
+5) Select "Build | Build ... (F7)".
+
+6) If you built an executable program, select
+   "Build | Execute ... (Ctrl+F5)".
+
+
+Note:
+
+To build the ASM-enabled code, you need Microsoft Assembler
+(ML.EXE).  You can get it by downloading and installing the
+latest Processor Pack for Visual C++ 6.0.
--- a/projects/visualc6/example.dsp
+++ b/projects/visualc6/example.dsp
@@ -0,0 +1,278 @@
+# Microsoft Developer Studio Project File - Name="example" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Console Application" 0x0103
+
+CFG=example - Win32 LIB Debug
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "example.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "example.mak" CFG="example - Win32 LIB Debug"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "example - Win32 DLL Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 DLL Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 DLL ASM Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 DLL ASM Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 LIB Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 LIB Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 LIB ASM Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "example - Win32 LIB ASM Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "example - Win32 DLL Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "example___Win32_DLL_Release"
+# PROP BASE Intermediate_Dir "example___Win32_DLL_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Win32_DLL_Release"
+# PROP Intermediate_Dir "Win32_DLL_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "example - Win32 DLL Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "example___Win32_DLL_Debug"
+# PROP BASE Intermediate_Dir "example___Win32_DLL_Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Win32_DLL_Debug"
+# PROP Intermediate_Dir "Win32_DLL_Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "example___Win32_DLL_ASM_Release"
+# PROP BASE Intermediate_Dir "example___Win32_DLL_ASM_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
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+# PROP Intermediate_Dir "Win32_DLL_ASM_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "example___Win32_DLL_ASM_Debug"
+# PROP BASE Intermediate_Dir "example___Win32_DLL_ASM_Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Win32_DLL_ASM_Debug"
+# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "example - Win32 LIB Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "example___Win32_LIB_Release"
+# PROP BASE Intermediate_Dir "example___Win32_LIB_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
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+# PROP Intermediate_Dir "Win32_LIB_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
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+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "example - Win32 LIB Debug"
+
+# PROP BASE Use_MFC 0
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+# PROP BASE Intermediate_Dir "example___Win32_LIB_Debug"
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+# PROP Use_Debug_Libraries 1
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+# PROP Intermediate_Dir "Win32_LIB_Debug"
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+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX
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+# SUBTRACT CPP /YX
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+# ADD RSC /l 0x409 /d "_DEBUG"
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+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "example___Win32_LIB_ASM_Release"
+# PROP BASE Intermediate_Dir "example___Win32_LIB_ASM_Release"
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+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
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+# PROP Intermediate_Dir "Win32_LIB_ASM_Release"
+# PROP Ignore_Export_Lib 0
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+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
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+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
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+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX
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+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ENDIF 
+
+# Begin Target
+
+# Name "example - Win32 DLL Release"
+# Name "example - Win32 DLL Debug"
+# Name "example - Win32 DLL ASM Release"
+# Name "example - Win32 DLL ASM Debug"
+# Name "example - Win32 LIB Release"
+# Name "example - Win32 LIB Debug"
+# Name "example - Win32 LIB ASM Release"
+# Name "example - Win32 LIB ASM Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
+# Begin Source File
+
+SOURCE=..\..\example.c
+# End Source File
+# End Group
+# Begin Group "Header Files"
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+# PROP Default_Filter "h;hpp;hxx;hm;inl"
+# Begin Source File
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+SOURCE=..\..\zconf.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\zlib.h
+# End Source File
+# End Group
+# End Target
+# End Project
--- a/projects/visualc6/minigzip.dsp
+++ b/projects/visualc6/minigzip.dsp
@@ -0,0 +1,278 @@
+# Microsoft Developer Studio Project File - Name="minigzip" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Console Application" 0x0103
+
+CFG=minigzip - Win32 LIB Debug
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "minigzip.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "minigzip.mak" CFG="minigzip - Win32 LIB Debug"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "minigzip - Win32 DLL Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 DLL Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 DLL ASM Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 DLL ASM Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 LIB Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 LIB Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 LIB ASM Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "minigzip - Win32 LIB ASM Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "minigzip - Win32 DLL Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "minigzip___Win32_DLL_Release"
+# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Win32_DLL_Release"
+# PROP Intermediate_Dir "Win32_DLL_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX
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+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
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+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
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+# ADD RSC /l 0x409 /d "_DEBUG"
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+# ADD BASE BSC32 /nologo
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+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
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+!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "minigzip___Win32_DLL_ASM_Release"
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+# PROP Intermediate_Dir "Win32_DLL_ASM_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "minigzip___Win32_DLL_ASM_Debug"
+# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_ASM_Debug"
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+# PROP Use_MFC 0
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+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
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+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "minigzip___Win32_LIB_Release"
+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_Release"
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+# PROP Ignore_Export_Lib 0
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+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
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+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
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+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
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+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
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+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "minigzip___Win32_LIB_ASM_Release"
+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_ASM_Release"
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+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX
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+# SUBTRACT CPP /YX
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
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+# ADD LINK32 /nologo /subsystem:console /machine:I386
+
+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "minigzip___Win32_LIB_ASM_Debug"
+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_ASM_Debug"
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+# PROP Use_MFC 0
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+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
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+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
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+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+
+!ENDIF 
+
+# Begin Target
+
+# Name "minigzip - Win32 DLL Release"
+# Name "minigzip - Win32 DLL Debug"
+# Name "minigzip - Win32 DLL ASM Release"
+# Name "minigzip - Win32 DLL ASM Debug"
+# Name "minigzip - Win32 LIB Release"
+# Name "minigzip - Win32 LIB Debug"
+# Name "minigzip - Win32 LIB ASM Release"
+# Name "minigzip - Win32 LIB ASM Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
+# Begin Source File
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+# End Source File
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+# Begin Group "Header Files"
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+# PROP Default_Filter "h;hpp;hxx;hm;inl"
+# Begin Source File
+
+SOURCE=..\..\zconf.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\zlib.h
+# End Source File
+# End Group
+# End Target
+# End Project
--- a/projects/visualc6/zlib.dsp
+++ b/projects/visualc6/zlib.dsp
@@ -0,0 +1,609 @@
+# Microsoft Developer Studio Project File - Name="zlib" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
+# TARGTYPE "Win32 (x86) Static Library" 0x0104
+
+CFG=zlib - Win32 LIB Debug
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "zlib.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "zlib.mak" CFG="zlib - Win32 LIB Debug"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "zlib - Win32 DLL Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlib - Win32 DLL Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlib - Win32 DLL ASM Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlib - Win32 DLL ASM Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlib - Win32 LIB Release" (based on "Win32 (x86) Static Library")
+!MESSAGE "zlib - Win32 LIB Debug" (based on "Win32 (x86) Static Library")
+!MESSAGE "zlib - Win32 LIB ASM Release" (based on "Win32 (x86) Static Library")
+!MESSAGE "zlib - Win32 LIB ASM Debug" (based on "Win32 (x86) Static Library")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+
+!IF  "$(CFG)" == "zlib - Win32 DLL Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlib___Win32_DLL_Release"
+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_Release"
+# PROP BASE Target_Dir ""
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+# PROP Output_Dir "Win32_DLL_Release"
+# PROP Intermediate_Dir "Win32_DLL_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
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+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX /Yc /Yu
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
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+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386
+# ADD LINK32 /nologo /dll /machine:I386 /out:"Win32_DLL_Release\zlib1.dll"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
+
+# PROP BASE Use_MFC 0
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+CPP=cl.exe
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT CPP /YX /Yc /Yu
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:"Win32_DLL_Debug\zlib1d.dll" /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlib___Win32_DLL_ASM_Release"
+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_ASM_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Win32_DLL_ASM_Release"
+# PROP Intermediate_Dir "Win32_DLL_ASM_Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "ASMV" /D "ASMINF" /FD /c
+# SUBTRACT CPP /YX /Yc /Yu
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386
+# ADD LINK32 /nologo /dll /machine:I386 /out:"Win32_DLL_ASM_Release\zlib1.dll"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "zlib___Win32_DLL_ASM_Debug"
+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_ASM_Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Win32_DLL_ASM_Debug"
+# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /D "ASMV" /D "ASMINF" /FD /GZ /c
+# SUBTRACT CPP /YX /Yc /Yu
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:"Win32_DLL_ASM_Debug\zlib1d.dll" /pdbtype:sept
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlib___Win32_LIB_Release"
+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Win32_LIB_Release"
+# PROP Intermediate_Dir "Win32_LIB_Release"
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT CPP /YX /Yc /Yu
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LIB32=link.exe -lib
+# ADD BASE LIB32 /nologo
+# ADD LIB32 /nologo
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "zlib___Win32_LIB_Debug"
+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Win32_LIB_Debug"
+# PROP Intermediate_Dir "Win32_LIB_Debug"
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT CPP /YX /Yc /Yu
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LIB32=link.exe -lib
+# ADD BASE LIB32 /nologo
+# ADD LIB32 /nologo /out:"Win32_LIB_Debug\zlibd.lib"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlib___Win32_LIB_ASM_Release"
+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_ASM_Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Win32_LIB_ASM_Release"
+# PROP Intermediate_Dir "Win32_LIB_ASM_Release"
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "ASMV" /D "ASMINF" /FD /c
+# SUBTRACT CPP /YX /Yc /Yu
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LIB32=link.exe -lib
+# ADD BASE LIB32 /nologo
+# ADD LIB32 /nologo
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "zlib___Win32_LIB_ASM_Debug"
+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_ASM_Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Win32_LIB_ASM_Debug"
+# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# SUBTRACT BASE CPP /YX /Yc /Yu
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /D "ASMV" /D "ASMINF" /FD /GZ /c
+# SUBTRACT CPP /YX /Yc /Yu
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LIB32=link.exe -lib
+# ADD BASE LIB32 /nologo
+# ADD LIB32 /nologo /out:"Win32_LIB_ASM_Debug\zlibd.lib"
+
+!ENDIF 
+
+# Begin Target
+
+# Name "zlib - Win32 DLL Release"
+# Name "zlib - Win32 DLL Debug"
+# Name "zlib - Win32 DLL ASM Release"
+# Name "zlib - Win32 DLL ASM Debug"
+# Name "zlib - Win32 LIB Release"
+# Name "zlib - Win32 LIB Debug"
+# Name "zlib - Win32 LIB ASM Release"
+# Name "zlib - Win32 LIB ASM Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
+# Begin Source File
+
+SOURCE=..\..\adler32.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\compress.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\crc32.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\deflate.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\gzio.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\infback.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inffast.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inflate.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inftrees.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\trees.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\uncompr.c
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\win32\zlib.def
+
+!IF  "$(CFG)" == "zlib - Win32 DLL Release"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+
+# PROP Exclude_From_Build 1
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\zutil.c
+# End Source File
+# End Group
+# Begin Group "Header Files"
+
+# PROP Default_Filter "h;hpp;hxx;hm;inl"
+# Begin Source File
+
+SOURCE=..\..\crc32.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\deflate.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inffast.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inffixed.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inflate.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\inftrees.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\trees.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\zconf.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\zlib.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\zutil.h
+# End Source File
+# End Group
+# Begin Group "Resource Files"
+
+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
+# Begin Source File
+
+SOURCE=..\..\win32\zlib1.rc
+# End Source File
+# End Group
+# Begin Group "Assembler Files (Unsupported)"
+
+# PROP Default_Filter "asm;obj;c;cpp;cxx;h;hpp;hxx"
+# Begin Source File
+
+SOURCE=..\..\contrib\masmx86\gvmat32.asm
+
+!IF  "$(CFG)" == "zlib - Win32 DLL Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Release
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Debug
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Release
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Debug
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\contrib\masmx86\gvmat32c.c
+
+!IF  "$(CFG)" == "zlib - Win32 DLL Release"
+
+# PROP Exclude_From_Build 1
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
+
+# PROP Exclude_From_Build 1
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
+
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
+
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
+
+# PROP Exclude_From_Build 1
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
+
+# PROP Exclude_From_Build 1
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
+
+# ADD CPP /I "..\.."
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+
+# ADD CPP /I "..\.."
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\contrib\masmx86\inffas32.asm
+
+!IF  "$(CFG)" == "zlib - Win32 DLL Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Release
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Debug
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Release
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Debug
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ENDIF 
+
+# End Source File
+# End Group
+# Begin Source File
+
+SOURCE=.\README.txt
+# End Source File
+# End Target
+# End Project
--- a/projects/visualc6/zlib.dsw
+++ b/projects/visualc6/zlib.dsw
@@ -0,0 +1,59 @@
+Microsoft Developer Studio Workspace File, Format Version 6.00
+# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
+
+###############################################################################
+
+Project: "example"=.\example.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+    Begin Project Dependency
+    Project_Dep_Name zlib
+    End Project Dependency
+}}}
+
+###############################################################################
+
+Project: "minigzip"=.\minigzip.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+    Begin Project Dependency
+    Project_Dep_Name zlib
+    End Project Dependency
+}}}
+
+###############################################################################
+
+Project: "zlib"=.\zlib.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+}}}
+
+###############################################################################
+
+Global:
+
+Package=<5>
+{{{
+}}}
+
+Package=<3>
+{{{
+}}}
+
+###############################################################################
+
--- a/qnx/package.qpg
+++ b/qnx/package.qpg
@@ -25,10 +25,10 @@
      <QPG:Files>
         <QPG:Add file="../zconf.h" install="/opt/include/" user="root:sys" permission="644"/>
         <QPG:Add file="../zlib.h" install="/opt/include/" user="root:sys" permission="644"/>
-         <QPG:Add file="../libz.so.1.2.0.5" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.0.5"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.0.5"/>
-         <QPG:Add file="../libz.so.1.2.0.5" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.2.2.1" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.2.1"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.2.1"/>
+         <QPG:Add file="../libz.so.1.2.2.1" install="/opt/lib/" component="slib"/>
      </QPG:Files>

      <QPG:PackageFilter>
@@ -63,7 +63,7 @@
            </QPM:ProductDescription>

            <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.2.0.5</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.2.2.1</QPM:ReleaseVersion>
               <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
               <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
               <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
--- a/trees.c
+++ b/trees.c
@@ -1,5 +1,5 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2003 Jean-loup Gailly
+ * Copyright (C) 1995-2004 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -930,8 +930,25 @@ void _tr_flush_block(s, buf, stored_len, eof)
    /* Build the Huffman trees unless a stored block is forced */
    if (s->level > 0) {

-         /* Check if the file is ascii or binary */
-        if (s->data_type == Z_UNKNOWN) set_data_type(s);
+        /* Check if the file is binary or text */
+        if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
+            set_data_type(s);
+
+#ifdef DEBUG
+        /* Write out literal/length frequencies for benchmarking */
+        if (z_verbose) {
+            FILE *freq;
+            freq = fopen("defreq.txt", "a");
+            if (freq != NULL) {
+                int n;
+                fputs("ltree:", freq);
+                for (n = 0; n < L_CODES; n++)
+                    fprintf(freq, " %d", s->dyn_ltree[n].Freq);
+                putc('\n', freq);
+                fclose(freq);
+            }
+        }
+#endif

        /* Construct the literal and distance trees */
        build_tree(s, (tree_desc *)(&(s->l_desc)));
@@ -1107,7 +1124,8 @@ local void compress_block(s, ltree, dtree)
        } /* literal or match pair ? */

        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
-        Assert(s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
+        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+               "pendingBuf overflow");

    } while (lx < s->last_lit);

@@ -1116,21 +1134,24 @@ local void compress_block(s, ltree, dtree)
 }

 /* ===========================================================================
- * Set the data type to ASCII or BINARY, using a crude approximation:
- * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
- * IN assertion: the fields freq of dyn_ltree are set and the total of all
- * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
+ * Set the data type to BINARY or TEXT, using a crude approximation:
+ * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
+ * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
+ * IN assertion: the fields Freq of dyn_ltree are set.
 */
 local void set_data_type(s)
    deflate_state *s;
 {
-    int n = 0;
-    unsigned ascii_freq = 0;
-    unsigned bin_freq = 0;
-    while (n < 7)        bin_freq += s->dyn_ltree[n++].Freq;
-    while (n < 128)    ascii_freq += s->dyn_ltree[n++].Freq;
-    while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
-    s->data_type = (Byte)(bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII);
+    int n;
+
+    for (n = 0; n < 9; n++)
+        if (s->dyn_ltree[n].Freq != 0)
+            break;
+    if (n == 9)
+        for (n = 14; n < 32; n++)
+            if (s->dyn_ltree[n].Freq != 0)
+                break;
+    s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
 }

 /* ===========================================================================
--- a/win32/DLL_FAQ.txt
+++ b/win32/DLL_FAQ.txt
@@ -12,7 +12,7 @@ in the zlib distribution, or at the following location:
 1. What is ZLIB1.DLL, and how can I get it?

  - ZLIB1.DLL is the official build of zlib as a DLL.
-    (Please remark the symbol '1' in the name.)
+    (Please remark the character '1' in the name.)

    Pointers to a precompiled ZLIB1.DLL can be found in the zlib
    web site at:
@@ -37,20 +37,19 @@ in the zlib distribution, or at the following location:
    and build settings.  If you do build the DLL yourself, please
    make sure that it complies with all the above requirements,
    and it runs with the precompiled test programs, bundled with
-    the original ZLIB1.DLL distribution and available at the zlib
-    web site.
+    the original ZLIB1.DLL distribution.

    If, for any reason, you need to build an incompatible DLL,
-    please use a different name.
+    please use a different file name.


 2. Why did you change the name of the DLL to ZLIB1.DLL?
    What happened to the old ZLIB.DLL?

-  - The old ZLIB.DLL, built from zlib-1.1.x and earlier, required
-    compilation settings that were incompatible to those used by a
-    static build.  The DLL settings were supposed to be enabled by
-    defining the macro ZLIB_DLL, before including "zlib.h".
+  - The old ZLIB.DLL, built from zlib-1.1.4 or earlier, required
+    compilation settings that were incompatible to those used by
+    a static build.  The DLL settings were supposed to be enabled
+    by defining the macro ZLIB_DLL, before including "zlib.h".
    Incorrect handling of this macro was silently accepted at
    build time, resulting in two major problems:

@@ -65,8 +64,8 @@ in the zlib distribution, or at the following location:
      functions.  Failure to do so resulted in creating binaries
      that were unable to run with the official ZLIB.DLL build.

-    The only possible solution that we could foresee was to make a
-    binary-incompatible change in the DLL interfacing, in order to
+    The only possible solution that we could foresee was to make
+    a binary-incompatible change in the DLL interface, in order to
    remove the dependency on the ZLIB_DLL macro, and to release
    the new DLL under a different name.

@@ -85,17 +84,13 @@ in the zlib distribution, or at the following location:

  - In principle, you can do it by assigning calling convention
    keywords to the macros ZEXPORT and ZEXPORTVA.  In practice,
-    it depends on what you mean by "an old ZLIB.DLL", because
-    the old DLL exists in several mutually-incompatible versions.
-
-    If you have a compiled application that works with a certain
-    ZLIB.DLL without any known security issues, there is hardly
-    a need to rebuild the DLL from new sources only to link it to
-    the old app binary.  But if you really want to do it, you have
-    to find out first what kind of calling convention uses your
-    particular ZLIB.DLL build, and to use the same one in the new
-    build.  If you don't know what this is all about, you might be
-    better off if you would just forget it.
+    it depends on what you mean by "an old ZLIB.DLL", because the
+    old DLL exists in several mutually-incompatible versions.
+    You have to find out first what kind of calling convention is
+    being used in your particular ZLIB.DLL build, and to use the
+    same one in the new build.  If you don't know what this is all
+    about, you might be better off if you would just leave the old
+    DLL intact.


 4. Can I compile my application using the new zlib interface, and
@@ -170,19 +165,19 @@ in the zlib distribution, or at the following location:
    the K&R-style function prototypes, where the argument types
    are not specified; but that is another story for another day.

-    The fact that remains is that CDECL is the default convention.
-    Even if an explicit convention (such as STDCALL or FASTCALL)
-    is hard-coded into the function prototypes inside C headers,
-    problems may appear.  One problem, for example, deals with the
-    necessity to expose the convention in users' callbacks.
+    The remaining fact is that CDECL is the default convention.
+    Even if an explicit convention is hard-coded into the function
+    prototypes inside C headers, problems may appear.  The
+    necessity to expose the convention in users' callbacks is one
+    of these problems.

    The calling convention issues are also important when using
    zlib in other programming languages.  Some of them, like Ada
    (GNAT) and Fortran (GNU G77), have C bindings implemented
    initially on Unix, and relying on the C calling convention.
    On the other hand, the pre- .NET versions of Microsoft Visual
-    Basic require STDCALL, while Borland Delphi prefers (although
-    it does not require) FASTCALL.
+    Basic require STDCALL, while Borland Delphi prefers, although
+    it does not require, FASTCALL.

    In fairness to all possible uses of zlib outside the C
    programming language, we choose the default "C" convention.
@@ -208,7 +203,14 @@ in the zlib distribution, or at the following location:
    zlib distribution.


- 8. If my application uses ZLIB1.DLL, should I link it to
+ 8. I need to use zlib in my Microsoft .NET project.  What can I
+    do?
+
+  - Henrik Ravn has contributed a .NET wrapper around zlib.  Look
+    into contrib/dotzlib/, inside the zlib distribution.
+
+
+ 9. If my application uses ZLIB1.DLL, should I link it to
    MSVCRT.DLL?  Why?

  - It is not required, but it is recommended to link your
@@ -223,8 +225,8 @@ in the zlib distribution, or at the following location:
    depend on it should also be linked to MSVCRT.DLL.


- 9. Why are you saying that ZLIB1.DLL and my application must be
-    linked to the same C run-time (CRT) library?  I linked my
+10. Why are you saying that ZLIB1.DLL and my application should
+    be linked to the same C run-time (CRT) library?  I linked my
    application and my DLLs to different C libraries (e.g. my
    application to a static library, and my DLLs to MSVCRT.DLL),
    and everything works fine.
@@ -255,11 +257,11 @@ in the zlib distribution, or at the following location:
    and DLLs are avoiding the corruption of each of the CRTs'
    internal states, maybe by careful design, or maybe by fortune.

-    Also note that linking ZLIB1.DLL to non-Microsoft CRTs (such
-    as those provided by Borland) raises similar problems.
+    Also note that linking ZLIB1.DLL to non-Microsoft CRTs, such
+    as those provided by Borland, raises similar problems.


-10. Why are you linking ZLIB1.DLL to MSVCRT.DLL?
+11. Why are you linking ZLIB1.DLL to MSVCRT.DLL?

  - MSVCRT.DLL exists on every Windows 95 with a new service pack
    installed, or with Microsoft Internet Explorer 4 or later, and
@@ -269,21 +271,14 @@ in the zlib distribution, or at the following location:
    software provider for free.

    The fact that MSVCRT.DLL does not exist on a virgin Windows 95
-    is not so problematic.  The number of Windows 95 installations
-    is rapidly decreasing, Microsoft stopped supporting it a long
-    time ago, and many recent applications from various vendors,
-    including Microsoft, do not even run on it.  Furthermore, no
-    serious user should run Windows 95 without a proper update
-    installed.
-
-    There is also the fact that the mainstream C compilers for
-    Windows are Microsoft Visual C++ 6.0, and gcc/MinGW.  Both
-    are producing executables that link to MSVCRT.DLL by default,
-    without offering other dynamic CRTs as alternatives easy to
-    select by users.
+    is not so problematic.  Windows 95 is scarcely found nowadays,
+    Microsoft ended its support a long time ago, and many recent
+    applications from various vendors, including Microsoft, do not
+    even run on it.  Furthermore, no serious user should run
+    Windows 95 without a proper update installed.


-11. Why are you not linking ZLIB1.DLL to
+12. Why are you not linking ZLIB1.DLL to
    <<my favorite C run-time library>> ?

  - We considered and abandoned the following alternatives:
@@ -294,27 +289,60 @@ in the zlib distribution, or at the following location:
      to a static C library, you may as well consider linking zlib
      in statically, too.

-    * Linking ZLIB1.DLL to CRTDLL.DLL looks very appealing,
-      because CRTDLL.DLL is present on every Win32 installation.
-      Unfortunately, it has a series of problems: it raises
-      difficulties when using it with C++ code, it does not work
-      with 64-bit file offsets, (and so on...), and Microsoft
-      discontinued its support a long time ago.
+    * Linking ZLIB1.DLL to CRTDLL.DLL looks appealing, because
+      CRTDLL.DLL is present on every Win32 installation.
+      Unfortunately, it has a series of problems: it does not
+      work properly with Microsoft's C++ libraries, it does not
+      provide support for 64-bit file offsets, (and so on...),
+      and Microsoft discontinued its support a long time ago.

-    * Linking ZLIB1.DLL to MSVCR70.DLL, supplied with the
-      Microsoft .NET platform and Visual C++ 7.0 or newer, is not
-      a good option.  Although it is available for free download
-      and distribution, its presence is scarce on today's Win32
-      installations.  If it will ever become more popular than
-      MSVCRT.DLL and will be pre-installed on the future Win32
-      systems, we will probably think again about it.
+    * Linking ZLIB1.DLL to MSVCR70.DLL or MSVCR71.DLL, supplied
+      with the Microsoft .NET platform, and Visual C++ 7.0/7.1,
+      raises problems related to the status of ZLIB1.DLL as a
+      system component.  According to the Microsoft Knowledge Base
+      article KB326922 "INFO: Redistribution of the Shared C
+      Runtime Component in Visual C++ .NET", MSVCR70.DLL and
+      MSVCR71.DLL are not supposed to function as system DLLs,
+      because they may clash with MSVCRT.DLL.  Instead, the
+      application's installer is supposed to put these DLLs
+      (if needed) in the application's private directory.
+      If ZLIB1.DLL depends on a non-system runtime, it cannot
+      function as a redistributable system component.

-    * Linking ZLIB1.DLL to NTDLL.DLL is not possible.
-      NTDLL.DLL exports only a part of the C library, and only on
-      Windows NT systems.
+    * Linking ZLIB1.DLL to non-Microsoft runtimes, such as
+      Borland's, or Cygwin's, raises problems related to the
+      reliable presence of these runtimes on Win32 systems.
+      It's easier to let the DLL build of zlib up to the people
+      who distribute these runtimes, and who may proceed as
+      explained in the answer to Question 14.


-12. I need to link my own DLL build to a CRT different than
+13. If ZLIB1.DLL cannot be linked to MSVCR70.DLL or MSVCR71.DLL,
+    how can I build/use ZLIB1.DLL in Microsoft Visual C++ 7.0
+    (Visual Studio .NET) or newer?
+
+  - Due to the problems explained in the Microsoft Knowledge Base
+    article KB326922 (see the previous answer), the C runtime that
+    comes with the VC7 environment is no longer considered a
+    system component.  That is, it should not be assumed that this
+    runtime exists, or may be installed in a system directory.
+    Since ZLIB1.DLL is supposed to be a system component, it may
+    not depend on a non-system component.
+
+    In order to link ZLIB1.DLL and your application to MSVCRT.DLL
+    in VC7, you need the library of Visual C++ 6.0 or older.  If
+    you don't have this library at hand, it's probably best not to
+    use ZLIB1.DLL.
+
+    We are hoping that, in the future, Microsoft will provide a
+    way to build applications linked to a proper system runtime,
+    from the Visual C++ environment.  Until then, you have a
+    couple of alternatives, such as linking zlib in statically.
+    If your application requires dynamic linking, you may proceed
+    as explained in the answer to Question 14.
+
+
+14. I need to link my own DLL build to a CRT different than
    MSVCRT.DLL.  What can I do?

  - Feel free to rebuild the DLL from the zlib sources, and link
@@ -330,22 +358,29 @@ in the zlib distribution, or at the following location:
    CYGWIN1.DLL, and it is distributed under the name CYGZ.DLL.


-13. May I include additional pieces of code that I find useful,
+15. May I include additional pieces of code that I find useful,
    link them in ZLIB1.DLL, and export them?

  - No.  A legitimate build of ZLIB1.DLL must not include code
-    that does not originate from the official zlib sources.  But
-    you can make your own private build, and give it a different
-    name, as suggested in the previous answer.
+    that does not originate from the official zlib source code.
+    But you can make your own private DLL build, under a different
+    file name, as suggested in the previous answer.

-    For example, in Borland Delphi and C++ Builder, zlib is a part
-    of the standard VCL library.  If an application links to VCL
-    dynamically, the name of the distributable binary (VCLxx.DLL)
-    does not posess any danger of clashing with a legitimate but
-    incompatible ZLIB1.DLL.
+    For example, zlib is a part of the VCL library, distributed
+    with Borland Delphi and C++ Builder.  The DLL build of VCL
+    is a redistributable file, named VCLxx.DLL.


-14. I made my own ZLIB1.DLL build.  Can I test it for compliance?
+16. May I remove some functionality out of ZLIB1.DLL, by enabling
+    macros like NO_GZCOMPRESS or NO_GZIP at compile time?
+
+  - No.  A legitimate build of ZLIB1.DLL must provide the complete
+    zlib functionality, as implemented in the official zlib source
+    code.  But you can make your own private DLL build, under a
+    different file name, as suggested in the previous answer.
+
+
+17. I made my own ZLIB1.DLL build.  Can I test it for compliance?

  - We prefer that you download the official DLL from the zlib
    web site.  If you need something peculiar from this DLL, you
@@ -356,3 +391,7 @@ in the zlib distribution, or at the following location:
    Running these test programs is not a guarantee of compliance,
    but a failure can imply a detected problem.

+**
+
+This document is written and maintained by
+Cosmin Truta <cosmint@cs.ubbcluj.ro>
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Mark Adler	9811b53dd9	zlib 1.2.2.1	2011-09-09 23:24:24 -07:00
Mark Adler	79fbcdc939	zlib 1.2.2	2011-09-09 23:24:02 -07:00
Mark Adler	7a6955760b	zlib 1.2.1.2	2011-09-09 23:23:45 -07:00
Mark Adler	f0e76a6634	zlib 1.2.1.1	2011-09-09 23:23:38 -07:00
Mark Adler	7a33a861d1	zlib 1.2.1	2011-09-09 23:23:27 -07:00
Mark Adler	a2506218cd	zlib 1.2.0.8	2011-09-09 23:23:14 -07:00
Mark Adler	b97ec631c6	zlib 1.2.0.7	2011-09-09 23:23:01 -07:00
Mark Adler	f81ba93d4a	zlib 1.2.0.6	2011-09-09 23:22:48 -07:00