zlib 1.1.1

ChangeLog

@@ -1,6 +1,75 @@
 
 		ChangeLog file for zlib
 
+Changes in 1.1.1 (27 Feb 98)
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+  compression ratio on some files. This also allows inlining _tr_tally for
+  matches in deflate_slow.
+- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
+
+Changes in 1.1.0 (24 Feb 98)
+- do not return STREAM_END prematurely in inflate (John Bowler)
+- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
+- compile with -DFASTEST to get compression code optimized for speed only
+- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
+- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
+  on Sun but significant on HP)
+
+- add a pointer to experimental unzip library in README (Gilles Vollant)
+- initialize variable gcc in configure (Chris Herborth)
+
+Changes in 1.0.9 (17 Feb 1998)
+- added gzputs and gzgets functions
+- do not clear eof flag in gzseek (Mark Diekhans)
+- fix gzseek for files in transparent mode (Mark Diekhans)
+- do not assume that vsprintf returns the number of bytes written (Jens Krinke)
+- replace EXPORT with ZEXPORT to avoid conflict with other programs
+- added compress2 in zconf.h, zlib.def, zlib.dnt
+- new asm code from Gilles Vollant in contrib/asm386
+- simplify the inflate code (Mark):
+ . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
+ . ZALLOC the length list in inflate_trees_fixed() instead of using stack
+ . ZALLOC the value area for huft_build() instead of using stack
+ . Simplify Z_FINISH check in inflate()
+
+- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
+- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
+- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
+  the declaration of FAR (Gilles VOllant)
+- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
+- read_buf buf parameter of type Bytef* instead of charf*
+- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
+- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
+- fix check for presence of directories in "make install" (Ian Willis)
+
+Changes in 1.0.8 (27 Jan 1998)
+- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
+- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
+- added compress2() to allow setting the compression level
+- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
+- use constant arrays for the static trees in trees.c instead of computing
+  them at run time (thanks to Ken Raeburn for this suggestion). To create
+  trees.h, compile with GEN_TREES_H and run "make test".
+- check return code of example in "make test" and display result
+- pass minigzip command line options to file_compress
+- simplifying code of inflateSync to avoid gcc 2.8 bug
+
+- support CC="gcc -Wall" in configure -s (QingLong)
+- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
+- fix test for shared library support to avoid compiler warnings
+- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
+- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
+- do not use fdopen for Metrowerks on Mac (Brad Pettit))
+- add checks for gzputc and gzputc in example.c
+- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
+- use const for the CRC table (Ken Raeburn)
+- fixed "make uninstall" for shared libraries
+- use Tracev instead of Trace in infblock.c
+- in example.c use correct compressed length for test_sync
+- suppress +vnocompatwarnings in configure for HPUX (not always supported)
+
 Changes in 1.0.7 (20 Jan 1998)
 - fix gzseek which was broken in write mode
 - return error for gzseek to negative absolute position
@@ -81,7 +150,6 @@ Changes in 1.0.6 (19 Jan 1998)
 - in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
 - Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
 - check for unistd.h in configure (for off_t)
-- use Tracev instead of Trace in infblock.c
 - remove useless check parameter in inflate_blocks_free
 - avoid useless assignment of s->check to itself in inflate_blocks_new
 - do not flush twice in gzclose (thanks to Ken Raeburn)

INDEX

@@ -13,6 +13,7 @@ descrip.mms		makefile for Vax/VMS
 zlib.3			mini man page for zlib (volunteers to write full
 			man pages from zlib.h welcome. write to jloup@gzip.org)
 
+msdos/Makefile.w32      makefile for Microsoft Visual C++ 32-bit
 msdos/Makefile.b32	makefile for Borland C++   32-bit
 msdos/Makefile.bor	makefile for Borland C/C++ 16-bit
 msdos/Makefile.dj2	makefile for DJGPP 2.x

Makefile

@@ -5,6 +5,7 @@
 # To compile and test, type:
 #   ./configure; make test
 # The call of configure is optional if you don't have special requirements
+# If you wish to build zlib as a shared library, use: ./configure -s
 
 # To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
 #    make install
@@ -22,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0.7
+VER=1.1.1
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -43,7 +44,7 @@ DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
   algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
   nt/Makefile.nt nt/zlib.dnt  contrib/README.contrib contrib/*.txt \
   contrib/asm386/*.asm contrib/asm386/*.c \
-  contrib/asm386/*.bat contrib/asm386/*.mak contrib/iostream/*.cpp \
+  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
   contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
   contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32
 
@@ -51,8 +52,13 @@ all: example minigzip
 
 test: all
 	@LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
-	./example ; \
-	echo hello world | ./minigzip | ./minigzip -d
+	echo hello world | ./minigzip | ./minigzip -d || \
+	  echo '		*** minigzip test FAILED ***' ; \
+	if ./example; then \
+	  echo '		*** zlib test OK ***'; \
+	else \
+	  echo '		*** zlib test FAILED ***'; \
+	fi
 
 libz.a: $(OBJS)
 	$(AR) $@ $(OBJS)
@@ -71,12 +77,12 @@ minigzip: minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-	-@if [ ! $(prefix)/include  ]; then mkdir $(prefix)/include; fi
-	-@if [ ! $(exec_prefix)/lib ]; then mkdir $(exec_prefix)/lib; fi
+	-@if [ ! -d $(prefix)/include  ]; then mkdir $(prefix)/include; fi
+	-@if [ ! -d $(exec_prefix)/lib ]; then mkdir $(exec_prefix)/lib; fi
 	cp zlib.h zconf.h $(prefix)/include
 	chmod 644 $(prefix)/include/zlib.h $(prefix)/include/zconf.h
 	cp $(LIBS) $(exec_prefix)/lib
-	cd $(exec_prefix)/lib; chmod 644 $(LIBS)
+	cd $(exec_prefix)/lib; chmod 755 $(LIBS)
 	-@(cd $(exec_prefix)/lib; $(RANLIB) libz.a || true) >/dev/null 2>&1
 	cd $(exec_prefix)/lib; if test -f $(SHAREDLIB).$(VER); then \
 	  rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
@@ -88,12 +94,16 @@ install: $(LIBS)
 # ldconfig is for Linux
 
 uninstall:
-	cd $(exec_prefix)/lib; rm -f $(LIBS); \
-	if test -f $(SHAREDLIB); then \
-	 v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p'<$(prefix)/include/zlib.h`;\
-	 rm -f $(SHAREDLIB).$$v $(SHAREDLIB); \
+	cd $(prefix)/include; \
+	v=$(VER); \
+	if test -f zlib.h; then \
+	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
+          rm -f zlib.h zconf.h; \
+	fi; \
+	cd $(exec_prefix)/lib; rm -f libz.a; \
+	if test -f $(SHAREDLIB).$$v; then \
+	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
 	fi
-	cdz $(prefix)/include; rm -f zlib.h zconf.h
 
 clean:
 	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
@@ -102,12 +112,14 @@ distclean:	clean
 
 zip:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
+	rm -f test.c ztest*.c
 	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
 	zip -ul9 zlib$$v $(DISTFILES)
 	mv Makefile~ Makefile
 
 dist:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
+	rm -f test.c ztest*.c
 	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; \
@@ -141,6 +153,6 @@ 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 infblock.h inftrees.h infcodes.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  

Makefile.in

@@ -5,6 +5,7 @@
 # To compile and test, type:
 #   ./configure; make test
 # The call of configure is optional if you don't have special requirements
+# If you wish to build zlib as a shared library, use: ./configure -s
 
 # To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
 #    make install
@@ -22,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0.7
+VER=1.1.1
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -43,7 +44,7 @@ DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
   algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
   nt/Makefile.nt nt/zlib.dnt  contrib/README.contrib contrib/*.txt \
   contrib/asm386/*.asm contrib/asm386/*.c \
-  contrib/asm386/*.bat contrib/asm386/*.mak contrib/iostream/*.cpp \
+  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
   contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
   contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32
 
@@ -51,8 +52,13 @@ all: example minigzip
 
 test: all
 	@LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
-	./example ; \
-	echo hello world | ./minigzip | ./minigzip -d
+	echo hello world | ./minigzip | ./minigzip -d || \
+	  echo '		*** minigzip test FAILED ***' ; \
+	if ./example; then \
+	  echo '		*** zlib test OK ***'; \
+	else \
+	  echo '		*** zlib test FAILED ***'; \
+	fi
 
 libz.a: $(OBJS)
 	$(AR) $@ $(OBJS)
@@ -71,12 +77,12 @@ minigzip: minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-	-@if [ ! $(prefix)/include  ]; then mkdir $(prefix)/include; fi
-	-@if [ ! $(exec_prefix)/lib ]; then mkdir $(exec_prefix)/lib; fi
+	-@if [ ! -d $(prefix)/include  ]; then mkdir $(prefix)/include; fi
+	-@if [ ! -d $(exec_prefix)/lib ]; then mkdir $(exec_prefix)/lib; fi
 	cp zlib.h zconf.h $(prefix)/include
 	chmod 644 $(prefix)/include/zlib.h $(prefix)/include/zconf.h
 	cp $(LIBS) $(exec_prefix)/lib
-	cd $(exec_prefix)/lib; chmod 644 $(LIBS)
+	cd $(exec_prefix)/lib; chmod 755 $(LIBS)
 	-@(cd $(exec_prefix)/lib; $(RANLIB) libz.a || true) >/dev/null 2>&1
 	cd $(exec_prefix)/lib; if test -f $(SHAREDLIB).$(VER); then \
 	  rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
@@ -88,12 +94,16 @@ install: $(LIBS)
 # ldconfig is for Linux
 
 uninstall:
-	cd $(exec_prefix)/lib; rm -f $(LIBS); \
-	if test -f $(SHAREDLIB); then \
-	 v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p'<$(prefix)/include/zlib.h`;\
-	 rm -f $(SHAREDLIB).$$v $(SHAREDLIB); \
+	cd $(prefix)/include; \
+	v=$(VER); \
+	if test -f zlib.h; then \
+	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
+          rm -f zlib.h zconf.h; \
+	fi; \
+	cd $(exec_prefix)/lib; rm -f libz.a; \
+	if test -f $(SHAREDLIB).$$v; then \
+	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
 	fi
-	cdz $(prefix)/include; rm -f zlib.h zconf.h
 
 clean:
 	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
@@ -102,12 +112,14 @@ distclean:	clean
 
 zip:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
+	rm -f test.c ztest*.c
 	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
 	zip -ul9 zlib$$v $(DISTFILES)
 	mv Makefile~ Makefile
 
 dist:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
+	rm -f test.c ztest*.c
 	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; \
@@ -141,6 +153,6 @@ 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 infblock.h inftrees.h infcodes.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  

README

@@ -1,15 +1,16 @@
-zlib 1.0.7 is a general purpose data compression library.  All the code
-is reentrant (thread safe).  The data format used by the zlib library
+zlib 1.1.1 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 
 ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
 format) 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. 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 minigzip.c.
+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 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 minigzip.c.
 
 To compile all files and run the test program, follow the instructions
 given at the top of Makefile. In short "make test; make install"
@@ -24,18 +25,15 @@ Mark Nelson wrote an article about zlib for the Jan. 1997 issue of
 Dr. Dobb's Journal; a copy of the article is available in
 http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.0.7 are documented in the file ChangeLog.
-The main changes since 1.0.6 are:
+The changes made in version 1.1.1 are documented in the file ChangeLog.
+The main changes since 1.1.0 are:
+
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+  compression ratio on some files. This also allows inlining _tr_tally for
+  matches in deflate_slow.
 
-- fix gzseek which was broken in write mode
-- return error for gzseek to negative absolute position
-- fix configure for Linux (Chun-Chung Chen)
-- increase stack space for MSC (Tim Wegner)
-- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
-- define EXPORTVA for gzprintf (Gilles Vollant)
-- added mini man page zlib.3 (Rick Rodgers) [volunteers to write full
-  man pages from zlib.h most welcome. write to jloup@gzip.org]
-- for contrib/untgz, fix makedir() and improve Makefile
 
 Unsupported third party contributions are provided in directory "contrib".
 
@@ -51,6 +49,11 @@ A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
 is available from the Python Software Association sites, such as:
 ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
 
+An experimental package to read 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
+
+
 Notes for some targets:
 
 - To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
@@ -71,10 +74,14 @@ Notes for some targets:
 - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1   
   it works when compiled with cc.
 
-- zlib doesn't work on HP-UX 9.05 with one cc compiler (the one not
-  accepting the -O option). It works with the other cc compiler.
+- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works
+  with other compilers. Use "make test" to check your compiler.
 
-- gzdopen is not supported on RISCOS
+- For shared memory multiprocessors, the decompression code assumes that
+  writes to pointers are atomic. Also the functions zalloc and zfree passed
+  to deflateInit must be multi-threaded in this case.
+
+- 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

adler32.c

@@ -18,7 +18,7 @@
 #define DO16(buf)   DO8(buf,0); DO8(buf,8);
 
 /* ========================================================================= */
-uLong EXPORT adler32(adler, buf, len)
+uLong ZEXPORT adler32(adler, buf, len)
     uLong adler;
     const Bytef *buf;
     uInt len;

compress.c

@@ -8,22 +8,22 @@
 #include "zlib.h"
 
 /* ===========================================================================
-     Compresses the source buffer into the destination buffer.  sourceLen is
-   the byte length of the source buffer. Upon entry, destLen is the total
-   size of the destination buffer, which must be at least 0.1% larger than
-   sourceLen plus 8 bytes. Upon exit, destLen is the actual size of the
-   compressed buffer.
-     This function can be used to compress a whole file at once if the
-   input file is mmap'ed.
-     compress returns Z_OK if success, Z_MEM_ERROR if there was not
-   enough memory, Z_BUF_ERROR if there was not enough room in the output
-   buffer.
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in deflateInit.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least 0.1% larger than sourceLen plus
+   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+   Z_STREAM_ERROR if the level parameter is invalid.
 */
-int EXPORT compress (dest, destLen, source, sourceLen)
+int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
     Bytef *dest;
     uLongf *destLen;
     const Bytef *source;
     uLong sourceLen;
+    int level;
 {
     z_stream stream;
     int err;
@@ -42,7 +42,7 @@ int EXPORT compress (dest, destLen, source, sourceLen)
     stream.zfree = (free_func)0;
     stream.opaque = (voidpf)0;
 
-    err = deflateInit(&stream, Z_DEFAULT_COMPRESSION);
+    err = deflateInit(&stream, level);
     if (err != Z_OK) return err;
 
     err = deflate(&stream, Z_FINISH);
@@ -55,3 +55,14 @@ int EXPORT compress (dest, destLen, source, sourceLen)
     err = deflateEnd(&stream);
     return err;
 }
+
+/* ===========================================================================
+ */
+int ZEXPORT compress (dest, destLen, source, sourceLen)
+    Bytef *dest;
+    uLongf *destLen;
+    const Bytef *source;
+    uLong sourceLen;
+{
+    return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
+}

configure

@@ -14,6 +14,10 @@
 #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
 # LDSHARED is the command to be used to create a shared library
 
+# Incorrect settings of CC or CFLAGS may prevent creating a shared library.
+# If you have problems, try without defining CC and CFLAGS before reporting
+# an error.
+
 LIBS=libz.a
 SHAREDLIB=libz.so
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
@@ -23,21 +27,32 @@ prefix=${prefix-/usr/local}
 exec_prefix=${exec_prefix-$prefix}
 shared_ext='.so'
 shared=0
+gcc=0
+old_cc="$CC"
+old_cflags="$CFLAGS"
 
 case "$1" in
   -s* | --s*) shared=1; shift;;
   -h* | --h*) echo 'syntax: configure [ --shared ]'; exit 0;;
 esac
 
-test -z "$CC" && echo Checking for gcc...
 test=ztest$$
 cat > $test.c <<EOF
-int hello() { printf("hello\n"); }
+extern int getchar();
+int hello() {return getchar();}
 EOF
-if test -z "$CC" -o "$CC" = "gcc" && (gcc -c -O3 $test.c) 2>/dev/null; then
-  CC=gcc
+
+test -z "$CC" && echo Checking for gcc...
+cc=${CC-gcc}
+cflags=${CFLAGS-"-O3"}
+case "$cc" in
+  *gcc*) gcc=1;;
+esac
+
+if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
+  CC="$cc"
   SFLAGS=${CFLAGS-"-fPIC -O3"}
-  CFLAGS=${CFLAGS-"-O3"}
+  CFLAGS="$cflags"
   case `(uname -s || echo unknown) 2>/dev/null` in
   Linux | linux) LDSHARED=${LDSHARED-"gcc -shared -Wl,-soname,libz.so.1"};;
   *)             LDSHARED=${LDSHARED-"gcc -shared"};;
@@ -65,7 +80,8 @@ else
 	     LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;
   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
 	     CFLAGS=${CFLAGS-"-O"}
-	     LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
+#	     LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
+	     LDSHARED=${LDSHARED-"ld -b"}
 	     shared_ext='.sl'
 	     SHAREDLIB='libz.sl';;
   UNIX_System_V\ 4.2.0) 
@@ -87,16 +103,18 @@ if test $shared -eq 1; then
     CFLAGS="$SFLAGS"
     LIBS="$SHAREDLIB.$VER"
     echo Building shared library $SHAREDLIB.$VER with $CC.
-  else
+  elif test -z "$old_cc" -a -z "$old_cflags"; then
     echo No shared library suppport.
     shared=0;
+  else
+    echo 'No shared library suppport; try without defining CC and CFLAGS'
+    shared=0;
   fi
 fi
 if test $shared -eq 0; then
   LDSHARED="$CC"
   echo Building static library $LIBS version $VER with $CC.
 fi
-rm -f $test.[co] $test$shared_ext
 
 if test -f /usr/include/unistd.h; then
   CFLAGS="$CFLAGS -DHAVE_UNISTD_H"
@@ -106,16 +124,33 @@ if test ! -f /usr/include/errno.h; then
   CFLAGS="$CFLAGS -DNO_ERRNO_H"
 fi
 
+cat > $test.c <<EOF
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+caddr_t hello() {
+  return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0); 
+}
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  CFLAGS="$CFLAGS -DUSE_MMAP"
+  echo Checking for mmap support... Yes.
+else
+  echo Checking for mmap support... No.
+fi
+
+rm -f $test.[co] $test$shared_ext
+
 # udpate Makefile
 sed < Makefile.in "
-/^CC *=/s,=.*,=$CC,
-/^CFLAGS *=/s/=.*/=$CFLAGS/
+/^CC *=/s%=.*%=$CC%
+/^CFLAGS *=/s%=.*%=$CFLAGS%
 /^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,
+/^LIBS *=/s%=.*%=$LIBS%
+/^SHAREDLIB *=/s%=.*%=$SHAREDLIB%
+/^AR *=/s%=.*%=$AR%
+/^RANLIB *=/s%=.*%=$RANLIB%
+/^VER *=/s%=.*%=$VER%
+/^prefix *=/s%=.*%=$prefix%
+/^exec_prefix *=/s%=.*%=$exec_prefix%
 " > Makefile

contrib/README.contrib

@@ -5,8 +5,7 @@ for help about these, not the zlib authors. Thanks.
 
 
 asm386/     by Gilles Vollant <info@winimage.com>
-	386 asm code replacing longest_match(). This code may be slower
-        than the C code if you have a good compiler.
+	386 asm code replacing longest_match(), for Visual C++ 4.2 and ML 6.11c
 
 iostream/   by Kevin Ruland <kevin@rodin.wustl.edu>
         A C++ I/O streams interface to the zlib gz* functions

contrib/asm386/gvmat32.asm

@@ -9,40 +9,36 @@
 ; For Visual C++ 4.2 and ML 6.11c (version in directory \MASM611C of Win95 DDK)
 ;   I compile with : "ml /coff /Zi /c gvmat32.asm"
 ;
-; uInt longest_match_gvasm(IPos cur_match,int* match_start_ptr,uInt scan_end,
-;                          uInt scan_start,ush* prev,uch* window,int best_len,
-;                          IPos limit,uInt chain_length,uch* scanrp,
-;                          uInt nice_match);
 
-;uInt longest_match(s, cur_match)
+;uInt longest_match_7fff(s, cur_match)
 ;    deflate_state *s;
 ;    IPos cur_match;                             /* current match */
 
-	NbStack		equ	76
-	cur_match	equ	dword ptr[esp+NbStack-0]
-	str_s		equ	dword ptr[esp+NbStack-4]
-	; 5 dword on top (ret,ebp,esi,edi,ebx)
-	adrret		equ	dword ptr[esp+NbStack-8]
-	pushebp		equ	dword ptr[esp+NbStack-12]
-	pushedi		equ	dword ptr[esp+NbStack-16]
-	pushesi		equ	dword ptr[esp+NbStack-20]
-	pushebx		equ	dword ptr[esp+NbStack-24]
+        NbStack         equ     76
+        cur_match       equ     dword ptr[esp+NbStack-0]
+        str_s           equ     dword ptr[esp+NbStack-4]
+; 5 dword on top (ret,ebp,esi,edi,ebx)
+        adrret          equ     dword ptr[esp+NbStack-8]
+        pushebp         equ     dword ptr[esp+NbStack-12]
+        pushedi         equ     dword ptr[esp+NbStack-16]
+        pushesi         equ     dword ptr[esp+NbStack-20]
+        pushebx         equ     dword ptr[esp+NbStack-24]
 
-	chain_length    equ dword ptr [esp+NbStack-28]
-	limit           equ dword ptr [esp+NbStack-32]
-	best_len        equ dword ptr [esp+NbStack-36]
-	window          equ dword ptr [esp+NbStack-40]
-	prev            equ dword ptr [esp+NbStack-44]
-	scan_start      equ  word ptr [esp+NbStack-48]
-	scan_end        equ  word ptr [esp+NbStack-52]
-	match_start_ptr equ dword ptr [esp+NbStack-56]
-	nice_match      equ dword ptr [esp+NbStack-60]
-	scanrp          equ dword ptr [esp+NbStack-64]
+        chain_length    equ     dword ptr [esp+NbStack-28]
+        limit           equ     dword ptr [esp+NbStack-32]
+        best_len        equ     dword ptr [esp+NbStack-36]
+        window          equ     dword ptr [esp+NbStack-40]
+        prev            equ     dword ptr [esp+NbStack-44]
+        scan_start      equ      word ptr [esp+NbStack-48]
+        wmask           equ     dword ptr [esp+NbStack-52]
+        match_start_ptr equ     dword ptr [esp+NbStack-56]
+        nice_match      equ     dword ptr [esp+NbStack-60]
+        scan            equ     dword ptr [esp+NbStack-64]
 
-	windowlen       equ dword ptr [esp+NbStack-68]
-	match_start     equ dword ptr [esp+NbStack-72]
-	strend			equ dword ptr [esp+NbStack-76]
-	NbStackAdd		equ	(76-24)
+        windowlen       equ     dword ptr [esp+NbStack-68]
+        match_start     equ     dword ptr [esp+NbStack-72]
+        strend          equ     dword ptr [esp+NbStack-76]
+        NbStackAdd      equ     (NbStack-24)
 
     .386p
 
@@ -50,415 +46,514 @@
     .MODEL  FLAT
 
 
-@lmtype				TYPEDEF         PROTO C :PTR , :SDWORD
-longest_match_c		PROTO           @lmtype
 
-	dep_max_chain_length	equ	70h
-	dep_window				equ	2ch
-	dep_strstart			equ	60h
-	dep_prev_length			equ 6ch
-	dep_nice_match			equ 84h
-	dep_w_size				equ	20h
-	dep_prev				equ	34h
-	dep_w_mask				equ	28h
-	dep_good_match			equ 80h
-	dep_match_start			equ	64h
-	dep_lookahead			equ	68h
+;  all the +4 offsets are due to the addition of pending_buf_size (in zlib
+;  in the deflate_state structure since the asm code was first written
+;  (if you compile with zlib 1.0.4 or older, remove the +4).
+;  Note : these value are good with a 8 bytes boundary pack structure
+    dep_chain_length    equ     70h+4
+    dep_window          equ     2ch+4
+    dep_strstart        equ     60h+4
+    dep_prev_length     equ     6ch+4
+    dep_nice_match      equ     84h+4
+    dep_w_size          equ     20h+4
+    dep_prev            equ     34h+4
+    dep_w_mask          equ     28h+4
+    dep_good_match      equ     80h+4
+    dep_match_start     equ     64h+4
+    dep_lookahead       equ     68h+4
 
 
-_TEXT   segment
-    public  _longest_match_asm7fff
+_TEXT                   segment
 
-    MAX_MATCH		equ 258
-	MIN_MATCH		equ 3
-	MIN_LOOKAHEAD equ (MAX_MATCH+MIN_MATCH+1)
+IFDEF NOUNDERLINE
+                        public  longest_match_7fff
+;                        public  match_init
+ELSE
+                        public  _longest_match_7fff
+;                        public  _match_init
+ENDIF
+
+    MAX_MATCH           equ     258
+    MIN_MATCH           equ     3
+    MIN_LOOKAHEAD       equ     (MAX_MATCH+MIN_MATCH+1)
+
+
+
+IFDEF NOUNDERLINE
+;match_init      proc near
+;                ret
+;match_init      endp
+ELSE
+;_match_init     proc near
+;                ret
+;_match_init     endp
+ENDIF
+
+
+IFDEF NOUNDERLINE
+longest_match_7fff   proc near
+ELSE
+_longest_match_7fff  proc near
+ENDIF
+
+        mov     edx,[esp+4]
+
+
+
+        push    ebp
+        push    edi
+        push    esi
+        push    ebx
+
+        sub     esp,NbStackAdd
 
 ; initialize or check the variables used in match.asm.
+        mov     ebp,edx
 
-
-; -----------------------------------------------------------------------
-; Set match_start to the longest match starting at the given string and
-; return its length. Matches shorter or equal to prev_length are discarded,
-; in which case the result is equal to prev_length and match_start is
-; garbage.
-; IN assertions: cur_match is the head of the hash chain for the current
-;   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
-
-; int longest_match(cur_match)
-
-_longest_match_asm7fff proc near
-
-
-
-	    ; return address
-
-		mov		eax,[esp+4]
-		mov		bx,[eax+dep_w_mask]
-		cmp		bx,7fffh
-		jnz		longest_match_c
-
-	    push    ebp             
-	    push    edi             
-	    push    esi             
-	    push    ebx             
-
-	    sub     esp,NbStackAdd
-
-		;//mov		ebp,str_s
-		mov		ebp,eax
-
-		mov		eax,[ebp+dep_max_chain_length]
-		mov		ebx,[ebp+dep_prev_length]
-		cmp		[ebp+dep_good_match],ebx	; if prev_length>=good_match chain_length >>= 2
-		ja		noshr		
-		shr		eax,2
+; chain_length = s->max_chain_length
+; if (prev_length>=good_match) chain_length >>= 2
+        mov     edx,[ebp+dep_chain_length]
+        mov     ebx,[ebp+dep_prev_length]
+        cmp     [ebp+dep_good_match],ebx
+        ja      noshr
+        shr     edx,2
 noshr:
-		mov		edi,[ebp+dep_nice_match]
-		mov		chain_length,eax
-		mov		edx,[ebp+dep_lookahead]
-		cmp		edx,edi
-;if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
-		jae		nolookaheadnicematch
-		mov		edi,edx
+; we increment chain_length because in the asm, the --chain_lenght is in the beginning of the loop
+        inc     edx
+        mov     edi,[ebp+dep_nice_match]
+        mov     chain_length,edx
+        mov     eax,[ebp+dep_lookahead]
+        cmp     eax,edi
+; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+        jae     nolookaheadnicematch
+        mov     edi,eax
 nolookaheadnicematch:
-		mov		best_len,ebx
+; best_len = s->prev_length
+        mov     best_len,ebx
 
+; window = s->window
+        mov     esi,[ebp+dep_window]
+        mov     ecx,[ebp+dep_strstart]
+        mov     window,esi
 
-		mov		esi,[ebp+dep_window]
-		mov		ecx,[ebp+dep_strstart]
-		mov		window,esi
-		
-		mov		nice_match,edi
-		add		esi,ecx
-		mov		scanrp,esi
-		mov		ax,word ptr [esi]
-		mov		bx,word ptr [esi+ebx-1]
-		add		esi,MAX_MATCH-1
-		mov		scan_start,ax
-		mov		strend,esi
-		mov		scan_end,bx
+        mov     nice_match,edi
+; scan = window + strstart
+        add     esi,ecx
+        mov     scan,esi
+; dx = *window
+        mov     dx,word ptr [esi]
+; bx = *(window+best_len-1)
+        mov     bx,word ptr [esi+ebx-1]
+        add     esi,MAX_MATCH-1
+; scan_start = *scan
+        mov     scan_start,dx
+; strend = scan + MAX_MATCH-1
+        mov     strend,esi
+; bx = scan_end = *(window+best_len-1)
 
 ;    IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
 ;        s->strstart - (IPos)MAX_DIST(s) : NIL;
 
-		mov		esi,[ebp+dep_w_size]
-		sub		esi,MIN_LOOKAHEAD
-		; here esi = MAX_DIST(s)
-		sub		ecx,esi
-		ja		nodist
-		xor		ecx,ecx
+        mov     esi,[ebp+dep_w_size]
+        sub     esi,MIN_LOOKAHEAD
+; here esi = MAX_DIST(s)
+        sub     ecx,esi
+        ja      nodist
+        xor     ecx,ecx
 nodist:
-		mov		limit,ecx
+        mov     limit,ecx
 
+; prev = s->prev
+        mov     edx,[ebp+dep_prev]
+        mov     prev,edx
 
+;
+        mov     edx,dword ptr [ebp+dep_match_start]
+        mov     bp,scan_start
+        mov     eax,cur_match
+        mov     match_start,edx
 
+        mov     edx,window
+        mov     edi,edx
+        add     edi,best_len
+        mov     esi,prev
+        dec     edi
+; windowlen = window + best_len -1
+        mov     windowlen,edi
 
-		mov		eax,[ebp+dep_prev]
-		mov		prev,eax
-
-	    mov     ebx,dword ptr [ebp+dep_match_start]
-	    mov     bp,scan_start
-	    mov     edx,cur_match
-	    mov     match_start,ebx
-
-	    mov     bx,scan_end
-	    mov     eax,window
-		mov		edi,eax
-	    add     edi,best_len
-	    mov     esi,prev
-		dec     edi
-	    mov     windowlen,edi
-	    
-	    jmp     beginloop2
-	    align   4
+        jmp     beginloop2
+        align   4
 
 ; here, in the loop
-;;;;       eax = chain_length
-;       edx = dx = cur_match
+;       eax = ax = cur_match
 ;       ecx = limit
 ;        bx = scan_end
 ;        bp = scan_start
-;       edi = windowlen (window + best_len)
+;       edi = windowlen (window + best_len -1)
 ;       esi = prev
 
 
-;// here; eax <=16
-normalbeg0add16: 
-		add		chain_length,16
-		jz		exitloop
-normalbeg0: 
-	    cmp     word ptr[edi+edx-0],bx
-	    je      normalbeg2
-	    and     edx,7fffh
-	    mov     dx,word ptr[esi+edx*2]
-	    cmp     ecx,edx
-	    jnb     exitloop
-	    dec     chain_length
-		jnz		normalbeg0
-;jnbexitloopshort1:
-		jmp     exitloop
+;// here; chain_length <=16
+normalbeg0add16:
+        add     chain_length,16
+        jz      exitloop
+normalbeg0:
+        cmp     word ptr[edi+eax],bx
+        je      normalbeg2noroll
+rcontlabnoroll:
+; cur_match = prev[cur_match & wmask]
+        and     eax,7fffh
+        mov     ax,word ptr[esi+eax*2]
+; if cur_match > limit, go to exitloop
+        cmp     ecx,eax
+        jnb     exitloop
+; if --chain_length != 0, go to exitloop
+        dec     chain_length
+        jnz     normalbeg0
+        jmp     exitloop
+
+normalbeg2noroll:
+; if (scan_start==*(cur_match+window)) goto normalbeg2
+        cmp     bp,word ptr[edx+eax]
+        jne     rcontlabnoroll
+        jmp     normalbeg2
 
 contloop3:
-	    mov     edi,windowlen
+        mov     edi,windowlen
 
 ; cur_match = prev[cur_match & wmask]
-	    and		edx,7fffh
-	    mov     dx,word ptr[esi+edx*2]
+        and     eax,7fffh
+        mov     ax,word ptr[esi+eax*2]
 ; if cur_match > limit, go to exitloop
-	    cmp     ecx,edx
+        cmp     ecx,eax
 jnbexitloopshort1:
-	    jnb     exitloop
+        jnb     exitloop
 ; if --chain_length != 0, go to exitloop
 
+
+; begin the main loop
 beginloop2:
-		sub		chain_length,16+1
-		jna     normalbeg0add16
+        sub     chain_length,16+1
+; if chain_length <=16, don't use the unrolled loop
+        jna     normalbeg0add16
 
 do16:
-	    cmp     word ptr[edi+edx],bx
-	    je      normalbeg2dc0
+        cmp     word ptr[edi+eax],bx
+        je      normalbeg2dc0
 
-maccn	MACRO	lab
-	    and     edx,7fffh
-	    mov     dx,word ptr[esi+edx*2]
-	    cmp     ecx,edx
-	    jnb     exitloop
-	    cmp     word ptr[edi+edx-0],bx
-	    je      lab
-		ENDM
+maccn   MACRO   lab
+        and     eax,7fffh
+        mov     ax,word ptr[esi+eax*2]
+        cmp     ecx,eax
+        jnb     exitloop
+        cmp     word ptr[edi+eax],bx
+        je      lab
+        ENDM
 
 rcontloop0:
-		maccn normalbeg2dc1
+        maccn   normalbeg2dc1
 
 rcontloop1:
-		maccn normalbeg2dc2
+        maccn   normalbeg2dc2
 
 rcontloop2:
-		maccn normalbeg2dc3
+        maccn   normalbeg2dc3
 
 rcontloop3:
-		maccn normalbeg2dc4
+        maccn   normalbeg2dc4
 
 rcontloop4:
-		maccn normalbeg2dc5
+        maccn   normalbeg2dc5
 
 rcontloop5:
-		maccn normalbeg2dc6
+        maccn   normalbeg2dc6
 
 rcontloop6:
-		maccn normalbeg2dc7
+        maccn   normalbeg2dc7
 
 rcontloop7:
-		maccn normalbeg2dc8
+        maccn   normalbeg2dc8
 
 rcontloop8:
-		maccn normalbeg2dc9
+        maccn   normalbeg2dc9
 
 rcontloop9:
-		maccn normalbeg2dc10
+        maccn   normalbeg2dc10
 
 rcontloop10:
-		maccn normalbeg2dc11
+        maccn   short normalbeg2dc11
 
 rcontloop11:
-		maccn short normalbeg2dc12
+        maccn   short normalbeg2dc12
 
 rcontloop12:
-		maccn short normalbeg2dc13
+        maccn   short normalbeg2dc13
 
 rcontloop13:
-		maccn short normalbeg2dc14
+        maccn   short normalbeg2dc14
 
 rcontloop14:
-		maccn short normalbeg2dc15
+        maccn   short normalbeg2dc15
 
 rcontloop15:
-	    and     edx,7fffh
-	    mov     dx,word ptr[esi+edx*2]
-	    cmp     ecx,edx
-	    jnb     short exitloopshort
+        and     eax,7fffh
+        mov     ax,word ptr[esi+eax*2]
+        cmp     ecx,eax
+        jnb     exitloop
 
-		sub		chain_length,16
-		ja		do16
-		jmp		normalbeg0add16
+        sub     chain_length,16
+        ja      do16
+        jmp     normalbeg0add16
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-exitloopshort:
-		jmp		exitloop                  
+normbeg MACRO   rcontlab,valsub
+; if we are here, we know that *(match+best_len-1) == scan_end
+        cmp     bp,word ptr[edx+eax]
+; if (match != scan_start) goto rcontlab
+        jne     rcontlab
+; calculate the good chain_length, and we'll compare scan and match string
+        add     chain_length,16-valsub
+        jmp     iseq
+        ENDM
 
-normbeg	MACRO	rcontlab,valsub
-	    cmp     bp,word ptr[eax+edx]
-		jne		rcontlab
-		add     chain_length,16-valsub
-		jmp		iseq
-		ENDM
-
-normalbeg2dc12:
-		normbeg	rcontloop12,12
-
-normalbeg2dc13:
-		normbeg	rcontloop13,13
-
-normalbeg2dc14:
-		normbeg	rcontloop14,14
-
-normalbeg2dc15:
-		normbeg	rcontloop15,15
 
 normalbeg2dc11:
-		normbeg	rcontloop11,11
+        normbeg rcontloop11,11
+
+normalbeg2dc12:
+        normbeg short rcontloop12,12
+
+normalbeg2dc13:
+        normbeg short rcontloop13,13
+
+normalbeg2dc14:
+        normbeg short rcontloop14,14
+
+normalbeg2dc15:
+        normbeg short rcontloop15,15
 
 normalbeg2dc10:
-		normbeg	rcontloop10,10
-
+        normbeg rcontloop10,10
 
 normalbeg2dc9:
-		normbeg	rcontloop9,9
+        normbeg rcontloop9,9
 
 normalbeg2dc8:
-		normbeg	rcontloop8,8
+        normbeg rcontloop8,8
 
 normalbeg2dc7:
-		normbeg	rcontloop7,7
-
-normalbeg2dc5:
-		normbeg	rcontloop5,5
-
-
-
-
+        normbeg rcontloop7,7
 
 normalbeg2dc6:
-		normbeg	rcontloop6,6
+        normbeg rcontloop6,6
+
+normalbeg2dc5:
+        normbeg rcontloop5,5
 
 normalbeg2dc4:
-		normbeg	rcontloop4,4
+        normbeg rcontloop4,4
 
 normalbeg2dc3:
-		normbeg	rcontloop3,3
+        normbeg rcontloop3,3
 
 normalbeg2dc2:
-		normbeg	rcontloop2,2
+        normbeg rcontloop2,2
 
 normalbeg2dc1:
-		normbeg	rcontloop1,1
+        normbeg rcontloop1,1
 
 normalbeg2dc0:
-		normbeg	rcontloop0,0
+        normbeg rcontloop0,0
 
 
 ; we go in normalbeg2 because *(ushf*)(match+best_len-1) == scan_end
 
 normalbeg2:
+        mov     edi,window
 
-			 ; 10 nop here take 10% time
-		mov		edi,window
-		  ;mov     chain_length,eax    ; now, we need eax...
-					
-	    cmp     bp,word ptr[edi+edx]
-	    jne     contloop3                   ; if *(ushf*)match != scan_start, continue
+        cmp     bp,word ptr[edi+eax]
+        jne     contloop3                   ; if *(ushf*)match != scan_start, continue
 
 iseq:
+; if we are here, we know that *(match+best_len-1) == scan_end
+; and (match == scan_start)
 
-		mov		edi,eax
-	    mov     esi,scanrp                  ; esi = scan    
-	    add     edi,edx				; edi = window + cur_match = match
+        mov     edi,edx
+        mov     esi,scan                    ; esi = scan
+        add     edi,eax                     ; edi = window + cur_match = match
 
-		       
-	    mov     eax,[esi+3]					; compare manually dword at match+3
-	    xor     eax,[edi+3]                 ;       and scan +3
+        mov     edx,[esi+3]                 ; compare manually dword at match+3
+        xor     edx,[edi+3]                 ; and scan +3
 
-	    jz      begincompare                ; if equal, go to long compare
+        jz      begincompare                ; if equal, go to long compare
 
-			; we will determine the unmatch byte and calculate len (in esi)
-		or		al,al
-		je		eq1rr
-	    mov     esi,3
-	    jmp     trfinval
+; we will determine the unmatch byte and calculate len (in esi)
+        or      dl,dl
+        je      eq1rr
+        mov     esi,3
+        jmp     trfinval
 eq1rr:
-	    or      ax,ax                               
-	    je      eq1
+        or      dx,dx
+        je      eq1
 
-	    mov     esi,4
-	    jmp     trfinval
+        mov     esi,4
+        jmp     trfinval
 eq1:
-	    shl     eax,8
-	    jz      eq11
-	    mov     esi,5
-	    jmp     trfinval
+        and     edx,0ffffffh
+        jz      eq11
+        mov     esi,5
+        jmp     trfinval
 eq11:
-	    mov     esi,6
-	    jmp     trfinval
+        mov     esi,6
+        jmp     trfinval
 
 begincompare:
-		; here we now scan and match begin same
-	    add     edi,6
-	    add     esi,6
-	    mov     ecx,(MAX_MATCH-(2+4))/4     ;//; scan for at most MAX_MATCH bytes
-	    repe    cmpsd                                               ;//; loop until mismatch
+        ; here we now scan and match begin same
+        add     edi,6
+        add     esi,6
+        mov     ecx,(MAX_MATCH-(2+4))/4     ; scan for at most MAX_MATCH bytes
+        repe    cmpsd                       ; loop until mismatch
 
-	    je      trfin                                               ; go to trfin if not unmatch
-			; we determine the unmatch byte
-	    sub     esi,4
-	    mov     eax,[edi-4]
-	    xor     eax,[esi]
-	    or      al,al
+        je      trfin                       ; go to trfin if not unmatch
+; we determine the unmatch byte
+        sub     esi,4
+        mov     edx,[edi-4]
+        xor     edx,[esi]
 
-	    jnz     trfin
-	    inc     esi
+        or      dl,dl
+        jnz     trfin
+        inc     esi
 
-	    or      ax,ax
-	    jnz     trfin
-	    inc     esi
+        or      dx,dx
+        jnz     trfin
+        inc     esi
 
-	    shl     eax,8           
-	    jnz     trfin
-	    inc     esi
+        and     edx,0ffffffh
+        jnz     trfin
+        inc     esi
 
-trfin:      
-	    sub     esi,scanrp          ; esi = len
+trfin:
+        sub     esi,scan          ; esi = len
 trfinval:
-	    cmp     esi,best_len        ; if len <= best_len, go contloop2
-	    jbe     contloop2
+; here we have finised compare, and esi contain len of equal string
+        cmp     esi,best_len        ; if len > best_len, go newbestlen
+        ja      short newbestlen
+; now we restore edx, ecx and esi, for the big loop
+        mov     esi,prev
+        mov     ecx,limit
+        mov     edx,window
+        jmp     contloop3
 
-	    mov     best_len,esi        ; len become best_len
+newbestlen:
+        mov     best_len,esi        ; len become best_len
 
-	    mov     match_start,edx
-	    cmp     esi,nice_match ;//; if esi >= nice_match, exit
-	    mov     ecx,scanrp
-	    jae     exitloop
-	    add     esi,window
-	    add     ecx,best_len
-			dec             esi
-	    mov     windowlen,esi
-	    mov     bx,[ecx-1]
+        mov     match_start,eax     ; save new position as match_start
+        cmp     esi,nice_match      ; if best_len >= nice_match, exit
+        jae     exitloop
+        mov     ecx,scan
+        mov     edx,window          ; restore edx=window
+        add     ecx,esi
+        add     esi,edx
+
+        dec     esi
+        mov     windowlen,esi       ; windowlen = window + best_len-1
+        mov     bx,[ecx-1]          ; bx = *(scan+best_len-1) = scan_end
+
+; now we restore ecx and esi, for the big loop :
+        mov     esi,prev
+        mov     ecx,limit
+        jmp     contloop3
+
+exitloop:
+; exit : s->match_start=match_start
+        mov     ebx,match_start
+        mov     ebp,str_s
+        mov     ecx,best_len
+        mov     dword ptr [ebp+dep_match_start],ebx        
+        mov     eax,dword ptr [ebp+dep_lookahead]
+        cmp     ecx,eax
+        ja      minexlo
+        mov     eax,ecx
+minexlo:
+; return min(best_len,s->lookahead)
+        
+; restore stack and register ebx,esi,edi,ebp
+        add     esp,NbStackAdd
+
+        pop     ebx
+        pop     esi
+        pop     edi
+        pop     ebp
+        ret
+InfoAuthor:
+; please don't remove this string !
+; Your are free use gvmat32 in any fre or commercial apps if you don't remove the string in the binary!
+        db     0dh,0ah,"GVMat32 optimised assembly code written 1996-98 by Gilles Vollant",0dh,0ah
 
 
-; now we restore eax, ecx and esi, for the big loop :
-contloop2:
-	    mov     esi,prev
-	    mov     ecx,limit
-	    ;mov     eax,chain_length
-		mov		eax,window
-	    jmp     contloop3
 
-exitloop:        
-	    mov     ebx,match_start
-		mov		ebp,str_s
-	    mov     dword ptr [ebp+dep_match_start],ebx
-	    mov     eax,best_len
-	    add     esp,NbStackAdd
+IFDEF NOUNDERLINE
+longest_match_7fff   endp
+ELSE
+_longest_match_7fff  endp
+ENDIF
 
 
-	    pop     ebx
-	    pop     esi
-	    pop     edi
-	    pop     ebp 
-	    ret
+IFDEF NOUNDERLINE
+cpudetect32     proc near
+ELSE
+_cpudetect32    proc near
+ENDIF
 
-_longest_match_asm7fff endp
+
+	pushfd                  ; push original EFLAGS
+	pop     eax             ; get original EFLAGS
+	mov     ecx, eax        ; save original EFLAGS
+	xor     eax, 40000h     ; flip AC bit in EFLAGS
+	push    eax             ; save new EFLAGS value on stack
+	popfd                   ; replace current EFLAGS value
+	pushfd                  ; get new EFLAGS
+	pop     eax             ; store new EFLAGS in EAX
+	xor     eax, ecx        ; can<61>t toggle AC bit, processor=80386
+	jz      end_cpu_is_386  ; jump if 80386 processor
+	push    ecx
+	popfd                   ; restore AC bit in EFLAGS first
+
+	pushfd
+	pushfd
+	pop     ecx
+			
+	mov     eax, ecx        ; get original EFLAGS
+	xor     eax, 200000h    ; flip ID bit in EFLAGS
+	push    eax             ; save new EFLAGS value on stack
+	popfd                   ; replace current EFLAGS value
+	pushfd                  ; get new EFLAGS
+	pop		eax	            ; store new EFLAGS in EAX
+	popfd                   ; restore original EFLAGS
+	xor		eax, ecx        ; can<61>t toggle ID bit,
+	je		is_old_486		; processor=old
+
+	mov     eax,1
+	db      0fh,0a2h        ;CPUID   
+
+exitcpudetect:
+	ret
+
+end_cpu_is_386:
+	mov     eax,0300h
+	jmp     exitcpudetect
+
+is_old_486:
+	mov     eax,0400h
+	jmp     exitcpudetect
+
+IFDEF NOUNDERLINE
+cpudetect32     endp
+ELSE
+_cpudetect32    endp
+ENDIF
 
 _TEXT   ends
 end
-					

contrib/asm386/gvmat32c.c

@@ -7,7 +7,6 @@
  *     (assembly code is faster with a fixed wmask)
  *
  */
-//#pragma optimize("agt",on)
 
 #include "deflate.h"
 
@@ -15,65 +14,31 @@
 #include <windows.h>
 
 #ifdef ASMV
-
 #define NIL 0
 
-static unsigned int tot=0;
-static unsigned int totl0=0;
-static unsigned int totl0p0=0;
-static unsigned int ba0=0;
-static unsigned int ba1=0;
-static unsigned int cpta=0;
-static unsigned int cptb=0;
-
 #define UNALIGNED_OK
-#define gvshow(a,b,c,d)
-/*
-void gvshow(int chain_length,int len,int limit,ushf* prev)
-{
-static int ival=0;
-char sz[80];
-unsigned long i;
-int prev0=*prev;
-	ival++;
-	//wsprintf(sz,"call %u, len=%u, chain_length=%u\n",ival,len,chain_length);
-	//OutputDebugString(sz);
-	tot++;
-	if (limit==NIL)
-		totl0++;
-	if ((limit==NIL) && (prev0==0))
-		totl0p0++;
-	for (i=limit+1;i<32768;i++)
-	{
-		ush va=*(prev+i);
-		if (ba0>4000000000)
-		{
-			ba0+=10;
-		}
-		ba0++;
-		if ((va>limit) || (va==0))
-			continue;
-		ba1++;
-	}
-}
-*/
 
 
 /* if your C compiler don't add underline before function name,
 		define ADD_UNDERLINE_ASMFUNC */
 #ifdef ADD_UNDERLINE_ASMFUNC
-#define longest_match_asm7fff _longest_match_asm7fff
+#define longest_match_7fff _longest_match_7fff
 #endif
+
+
+
 void match_init()
 {
 }
 
+unsigned long cpudetect32();
+
 uInt longest_match_c(
     deflate_state *s,
     IPos cur_match);                             /* current match */
 
 
-uInt longest_match_asm7fff(
+uInt longest_match_7fff(
     deflate_state *s,
     IPos cur_match);                             /* current match */
 
@@ -81,9 +46,15 @@ uInt longest_match(
     deflate_state *s,
     IPos cur_match)                             /* current match */
 {
-    if (s->w_mask == 0x7fff)
-        return longest_match_asm7fff(s,cur_match);
-    return longest_match_c(s,cur_match);
+	static uInt iIsPPro=2;
+
+    if ((s->w_mask == 0x7fff) && (iIsPPro==0))
+        return longest_match_7fff(s,cur_match);
+
+	if (iIsPPro==2)
+		iIsPPro = (((cpudetect32()/0x100)&0xf)>=6) ? 1 : 0;
+
+	return longest_match_c(s,cur_match);
 }
 
 
@@ -222,7 +193,7 @@ uInt longest_match_c(s, cur_match)
     } while ((cur_match = prev[cur_match & wmask]) > limit
              && --chain_length != 0);
 
-    if ((uInt)best_len <= s->lookahead) return best_len;
+    if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
     return s->lookahead;
 }
 

contrib/asm386/zlibvc.dsp

@@ -0,0 +1,612 @@
+# Microsoft Developer Studio Project File - Name="zlibvc" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 5.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
+# TARGTYPE "Win32 (ALPHA) Dynamic-Link Library" 0x0602
+
+CFG=zlibvc - Win32 Release
+!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 "zlibvc.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 "zlibvc.mak" CFG="zlibvc - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "zlibvc - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlibvc - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlibvc - Win32 ReleaseAxp" (based on\
+ "Win32 (ALPHA) Dynamic-Link Library")
+!MESSAGE "zlibvc - Win32 ReleaseWithoutAsm" (based on\
+ "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "zlibvc - Win32 ReleaseWithoutCrtdll" (based on\
+ "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+
+# Begin Project
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir ".\Release"
+# PROP BASE Intermediate_Dir ".\Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir ".\Release"
+# PROP Intermediate_Dir ".\Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /YX /c
+# ADD CPP /nologo /MT /W3 /GX /O2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /D "ASMV" /FAcs /FR /YX /FD /c
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "NDEBUG" /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+RSC=rc.exe
+# ADD BASE RSC /l 0x40c /d "NDEBUG"
+# ADD RSC /l 0x40c /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /dll /machine:I386
+# ADD LINK32 gvmat32.obj kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib crtdll.lib /nologo /subsystem:windows /dll /map /machine:I386 /nodefaultlib /out:".\Release\zlib.dll"
+# SUBTRACT LINK32 /pdb:none
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir ".\Debug"
+# PROP BASE Intermediate_Dir ".\Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir ".\Debug"
+# PROP Intermediate_Dir ".\Debug"
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /YX /c
+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /YX /FD /c
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "_DEBUG" /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+RSC=rc.exe
+# ADD BASE RSC /l 0x40c /d "_DEBUG"
+# ADD RSC /l 0x40c /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:windows /dll /debug /machine:I386
+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib /nologo /subsystem:windows /dll /debug /machine:I386 /out:".\Debug\zlib.dll"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlibvc__"
+# PROP BASE Intermediate_Dir "zlibvc__"
+# PROP BASE Ignore_Export_Lib 0
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "zlibvc__"
+# PROP Intermediate_Dir "zlibvc__"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+MTL=midl.exe
+# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+CPP=cl.exe
+# ADD BASE CPP /nologo /MT /Gt0 /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /FAcs /FR /YX /FD /c
+# ADD CPP /nologo /MT /Gt0 /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /FAcs /FR /YX /FD /c
+RSC=rc.exe
+# ADD BASE RSC /l 0x40c /d "NDEBUG"
+# ADD RSC /l 0x40c /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 crtdll.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib /nologo /subsystem:windows /dll /map /machine:ALPHA /nodefaultlib /out:".\Release\zlib.dll"
+# SUBTRACT BASE LINK32 /pdb:none
+# ADD LINK32 crtdll.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib /nologo /subsystem:windows /dll /map /machine:ALPHA /nodefaultlib /out:"zlibvc__\zlib.dll"
+# SUBTRACT LINK32 /pdb:none
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlibvc_0"
+# PROP BASE Intermediate_Dir "zlibvc_0"
+# PROP BASE Ignore_Export_Lib 0
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "zlibvc_0"
+# PROP Intermediate_Dir "zlibvc_0"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /FAcs /FR /YX /FD /c
+# ADD CPP /nologo /MT /W3 /GX /O2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /FAcs /FR /YX /FD /c
+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 0x40c /d "NDEBUG"
+# ADD RSC /l 0x40c /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 crtdll.lib /nologo /subsystem:windows /dll /map /machine:I386 /nodefaultlib /out:".\Release\zlib.dll"
+# SUBTRACT BASE LINK32 /pdb:none
+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib crtdll.lib /nologo /subsystem:windows /dll /map /machine:I386 /nodefaultlib /out:".\zlibvc_0\zlib.dll"
+# SUBTRACT LINK32 /pdb:none
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlibvc_1"
+# PROP BASE Intermediate_Dir "zlibvc_1"
+# PROP BASE Ignore_Export_Lib 0
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "zlibvc_1"
+# PROP Intermediate_Dir "zlibvc_1"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /D "ASMV" /FAcs /FR /YX /FD /c
+# ADD CPP /nologo /MT /W3 /GX /O2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_WINDLL" /D "_WIN32" /D "BUILD_ZLIBDLL" /D "ZLIB_DLL" /D "DYNAMIC_CRC_TABLE" /D "ASMV" /FAcs /FR /YX /FD /c
+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 0x40c /d "NDEBUG"
+# ADD RSC /l 0x40c /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 gvmat32.obj kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib crtdll.lib /nologo /subsystem:windows /dll /map /machine:I386 /nodefaultlib /out:".\Release\zlib.dll"
+# SUBTRACT BASE LINK32 /pdb:none
+# ADD LINK32 gvmat32.obj kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib crtdll.lib /nologo /subsystem:windows /dll /map /machine:I386 /nodefaultlib /out:".\zlibvc_1\zlib.dll"
+# SUBTRACT LINK32 /pdb:none
+
+!ENDIF 
+
+# Begin Target
+
+# Name "zlibvc - Win32 Release"
+# Name "zlibvc - Win32 Debug"
+# Name "zlibvc - Win32 ReleaseAxp"
+# Name "zlibvc - Win32 ReleaseWithoutAsm"
+# Name "zlibvc - Win32 ReleaseWithoutCrtdll"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;hpj;bat;for;f90"
+# Begin Source File
+
+SOURCE=.\adler32.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_ADLER=\
+	".\zconf.h"\
+	".\zlib.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=.\compress.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_COMPR=\
+	".\zconf.h"\
+	".\zlib.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=.\crc32.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_CRC32=\
+	".\zconf.h"\
+	".\zlib.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
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+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
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+# End Source File
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+SOURCE=.\deflate.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_DEFLA=\
+	".\deflate.h"\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
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+SOURCE=.\gvmat32c.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=.\gzio.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_GZIO_=\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=.\infblock.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_INFBL=\
+	".\infblock.h"\
+	".\infcodes.h"\
+	".\inftrees.h"\
+	".\infutil.h"\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=.\infcodes.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_INFCO=\
+	".\infblock.h"\
+	".\infcodes.h"\
+	".\inffast.h"\
+	".\inftrees.h"\
+	".\infutil.h"\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
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+SOURCE=.\inffast.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_INFFA=\
+	".\infblock.h"\
+	".\infcodes.h"\
+	".\inffast.h"\
+	".\inftrees.h"\
+	".\infutil.h"\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
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+SOURCE=.\inflate.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_INFLA=\
+	".\infblock.h"\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
+SOURCE=.\inftrees.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseAxp"
+
+DEP_CPP_INFTR=\
+	".\inftrees.h"\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutCrtdll"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
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+SOURCE=.\infutil.c
+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
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+
+DEP_CPP_INFUT=\
+	".\infblock.h"\
+	".\infcodes.h"\
+	".\inftrees.h"\
+	".\infutil.h"\
+	".\zconf.h"\
+	".\zlib.h"\
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+
+DEP_CPP_TREES=\
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+	".\zconf.h"\
+	".\zlib.h"\
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+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
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+
+!IF  "$(CFG)" == "zlibvc - Win32 Release"
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+
+DEP_CPP_UNCOM=\
+	".\zconf.h"\
+	".\zlib.h"\
+	
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+
+DEP_CPP_ZUTIL=\
+	".\zconf.h"\
+	".\zlib.h"\
+	".\zutil.h"\
+	
+
+!ELSEIF  "$(CFG)" == "zlibvc - Win32 ReleaseWithoutAsm"
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contrib/asm386/zlibvc.dsw

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+
+###############################################################################
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+Project: "zlibvc"=".\zlibvc.dsp" - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+}}}
+
+###############################################################################
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+Global:
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+Package=<5>
+{{{
+}}}
+
+Package=<3>
+{{{
+}}}
+
+###############################################################################
+

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-
-.cpp{$(CPP_OBJS)}.obj:
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-.cxx{$(CPP_OBJS)}.obj:
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-.c{$(CPP_SBRS)}.sbr:
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-.cpp{$(CPP_SBRS)}.sbr:
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-.cxx{$(CPP_SBRS)}.sbr:
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-!ENDIF 
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-################################################################################
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-DEP_CPP_ADLER=\
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-	".\zlib.h"\
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-
-!IF  "$(CFG)" == "zlibvc - Win32 Release"
-
-
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-
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-SOURCE=.\compress.c
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-	".\zlib.h"\
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-
-!IF  "$(CFG)" == "zlibvc - Win32 Release"
-
-
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-
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crc32.c

@@ -45,7 +45,7 @@ local void make_crc_table()
   int n, k;
   uLong poly;            /* polynomial exclusive-or pattern */
   /* terms of polynomial defining this crc (except x^32): */
-  static Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
+  static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
 
   /* make exclusive-or pattern from polynomial (0xedb88320L) */
   poly = 0L;
@@ -65,7 +65,7 @@ local void make_crc_table()
 /* ========================================================================
  * Table of CRC-32's of all single-byte values (made by make_crc_table)
  */
-local uLongf crc_table[256] = {
+local const uLongf crc_table[256] = {
   0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
   0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
   0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
@@ -124,12 +124,12 @@ local uLongf crc_table[256] = {
 /* =========================================================================
  * This function can be used by asm versions of crc32()
  */
-uLongf * EXPORT get_crc_table()
+const uLongf * ZEXPORT get_crc_table()
 {
 #ifdef DYNAMIC_CRC_TABLE
   if (crc_table_empty) make_crc_table();
 #endif
-  return (uLongf *)crc_table;
+  return (const uLongf *)crc_table;
 }
 
 /* ========================================================================= */
@@ -139,7 +139,7 @@ uLongf * EXPORT get_crc_table()
 #define DO8(buf)  DO4(buf); DO4(buf);
 
 /* ========================================================================= */
-uLong EXPORT crc32(crc, buf, len)
+uLong ZEXPORT crc32(crc, buf, len)
     uLong crc;
     const Bytef *buf;
     uInt len;

deflate.c

@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.0.7 Copyright 1995-1998 Jean-loup Gailly ";
+   " deflate 1.1.1 Copyright 1995-1998 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
@@ -80,7 +80,7 @@ local block_state deflate_slow   OF((deflate_state *s, int flush));
 local void lm_init        OF((deflate_state *s));
 local void putShortMSB    OF((deflate_state *s, uInt b));
 local void flush_pending  OF((z_streamp strm));
-local int read_buf        OF((z_streamp strm, charf *buf, unsigned size));
+local int read_buf        OF((z_streamp strm, Bytef *buf, unsigned size));
 #ifdef ASMV
       void match_init OF((void)); /* asm code initialization */
       uInt longest_match  OF((deflate_state *s, IPos cur_match));
@@ -160,14 +160,23 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
  * Insert string str in the dictionary and set match_head to the previous head
  * of the hash chain (the most recent string with same hash key). Return
  * the previous length of the hash chain.
+ * If this file is compiled with -DFASTEST, the compression level is forced
+ * to 1, and no hash chains are maintained.
  * IN  assertion: all calls to to INSERT_STRING are made with consecutive
  *    input characters and the first MIN_MATCH bytes of str are valid
  *    (except for the last MIN_MATCH-1 bytes of the input file).
  */
+#ifdef FASTEST
+#define INSERT_STRING(s, str, match_head) \
+   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+    match_head = s->head[s->ins_h], \
+    s->head[s->ins_h] = (Pos)(str))
+#else
 #define INSERT_STRING(s, str, match_head) \
    (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
     s->prev[(str) & s->w_mask] = match_head = s->head[s->ins_h], \
     s->head[s->ins_h] = (Pos)(str))
+#endif
 
 /* ===========================================================================
  * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
@@ -175,10 +184,10 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
  */
 #define CLEAR_HASH(s) \
     s->head[s->hash_size-1] = NIL; \
-    zmemzero((charf *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+    zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
 
 /* ========================================================================= */
-int EXPORT deflateInit_(strm, level, version, stream_size)
+int ZEXPORT deflateInit_(strm, level, version, stream_size)
     z_streamp strm;
     int level;
     const char *version;
@@ -190,7 +199,7 @@ int EXPORT deflateInit_(strm, level, version, stream_size)
 }
 
 /* ========================================================================= */
-int EXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 		  version, stream_size)
     z_streamp strm;
     int  level;
@@ -224,6 +233,9 @@ int EXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
     if (strm->zfree == Z_NULL) strm->zfree = zcfree;
 
     if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#ifdef FASTEST
+    level = 1;
+#endif
 
     if (windowBits < 0) { /* undocumented feature: suppress zlib header */
         noheader = 1;
@@ -276,7 +288,7 @@ int EXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 }
 
 /* ========================================================================= */
-int EXPORT deflateSetDictionary (strm, dictionary, dictLength)
+int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
     z_streamp strm;
     const Bytef *dictionary;
     uInt  dictLength;
@@ -299,7 +311,7 @@ int EXPORT deflateSetDictionary (strm, dictionary, dictLength)
 	dictionary += dictLength - length; /* use the tail of the dictionary */
 #endif
     }
-    zmemcpy((charf *)s->window, dictionary, length);
+    zmemcpy(s->window, dictionary, length);
     s->strstart = length;
     s->block_start = (long)length;
 
@@ -317,7 +329,7 @@ int EXPORT deflateSetDictionary (strm, dictionary, dictLength)
 }
 
 /* ========================================================================= */
-int EXPORT deflateReset (strm)
+int ZEXPORT deflateReset (strm)
     z_streamp strm;
 {
     deflate_state *s;
@@ -347,7 +359,7 @@ int EXPORT deflateReset (strm)
 }
 
 /* ========================================================================= */
-int EXPORT deflateParams(strm, level, strategy)
+int ZEXPORT deflateParams(strm, level, strategy)
     z_streamp strm;
     int level;
     int strategy;
@@ -421,7 +433,7 @@ local void flush_pending(strm)
 }
 
 /* ========================================================================= */
-int EXPORT deflate (strm, flush)
+int ZEXPORT deflate (strm, flush)
     z_streamp strm;
     int flush;
 {
@@ -555,7 +567,7 @@ int EXPORT deflate (strm, flush)
 }
 
 /* ========================================================================= */
-int EXPORT deflateEnd (strm)
+int ZEXPORT deflateEnd (strm)
     z_streamp strm;
 {
     int status;
@@ -585,7 +597,7 @@ int EXPORT deflateEnd (strm)
  * To simplify the source, this is not supported for 16-bit MSDOS (which
  * doesn't have enough memory anyway to duplicate compression states).
  */
-int EXPORT deflateCopy (dest, source)
+int ZEXPORT deflateCopy (dest, source)
     z_streamp dest;
     z_streamp source;
 {
@@ -647,7 +659,7 @@ int EXPORT deflateCopy (dest, source)
  */
 local int read_buf(strm, buf, size)
     z_streamp strm;
-    charf *buf;
+    Bytef *buf;
     unsigned size;
 {
     unsigned len = strm->avail_in;
@@ -708,6 +720,7 @@ local void lm_init (s)
 /* For 80x86 and 680x0, an optimized version will be provided in match.asm or
  * match.S. The code will be functionally equivalent.
  */
+#ifndef FASTEST
 local uInt longest_match(s, cur_match)
     deflate_state *s;
     IPos cur_match;                             /* current match */
@@ -842,9 +855,67 @@ local uInt longest_match(s, cur_match)
     } while ((cur_match = prev[cur_match & wmask]) > limit
              && --chain_length != 0);
 
-    if ((uInt)best_len <= s->lookahead) return best_len;
+    if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
     return s->lookahead;
 }
+
+#else /* FASTEST */
+/* ---------------------------------------------------------------------------
+ * Optimized version for level == 1 only
+ */
+local uInt longest_match(s, cur_match)
+    deflate_state *s;
+    IPos cur_match;                             /* current match */
+{
+    register Bytef *scan = s->window + s->strstart; /* current string */
+    register Bytef *match;                       /* matched string */
+    register int len;                           /* length of current match */
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+
+    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+     * It is easy to get rid of this optimization if necessary.
+     */
+    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+    Assert(cur_match < s->strstart, "no future");
+
+    match = s->window + cur_match;
+
+    /* Return failure if the match length is less than 2:
+     */
+    if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
+
+    /* The check at best_len-1 can be removed because it will be made
+     * again later. (This heuristic is not always a win.)
+     * It is not necessary to compare scan[2] and match[2] since they
+     * are always equal when the other bytes match, given that
+     * the hash keys are equal and that HASH_BITS >= 8.
+     */
+    scan += 2, match += 2;
+    Assert(*scan == *match, "match[2]?");
+
+    /* We check for insufficient lookahead only every 8th comparison;
+     * the 256th check will be made at strstart+258.
+     */
+    do {
+    } while (*++scan == *++match && *++scan == *++match &&
+	     *++scan == *++match && *++scan == *++match &&
+	     *++scan == *++match && *++scan == *++match &&
+	     *++scan == *++match && *++scan == *++match &&
+	     scan < strend);
+
+    Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+    len = MAX_MATCH - (int)(strend - scan);
+
+    if (len < MIN_MATCH) return MIN_MATCH - 1;
+
+    s->match_start = cur_match;
+    return len <= s->lookahead ? len : s->lookahead;
+}
+#endif /* FASTEST */
 #endif /* ASMV */
 
 #ifdef DEBUG
@@ -857,8 +928,8 @@ local void check_match(s, start, match, length)
     int length;
 {
     /* check that the match is indeed a match */
-    if (zmemcmp((charf *)s->window + match,
-                (charf *)s->window + start, length) != EQUAL) {
+    if (zmemcmp(s->window + match,
+                s->window + start, length) != EQUAL) {
         fprintf(stderr, " start %u, match %u, length %d\n",
 		start, match, length);
         do {
@@ -911,8 +982,7 @@ local void fill_window(s)
          */
         } else if (s->strstart >= wsize+MAX_DIST(s)) {
 
-            zmemcpy((charf *)s->window, (charf *)s->window+wsize,
-                   (unsigned)wsize);
+            zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
             s->match_start -= wsize;
             s->strstart    -= wsize; /* we now have strstart >= MAX_DIST */
             s->block_start -= (long) wsize;
@@ -931,6 +1001,7 @@ local void fill_window(s)
 	    } while (--n);
 
 	    n = wsize;
+#ifndef FASTEST
 	    p = &s->prev[n];
 	    do {
 		m = *--p;
@@ -939,6 +1010,7 @@ local void fill_window(s)
 		 * its value will never be used.
 		 */
 	    } while (--n);
+#endif
             more += wsize;
         }
         if (s->strm->avail_in == 0) return;
@@ -956,8 +1028,7 @@ local void fill_window(s)
          */
         Assert(more >= 2, "more < 2");
 
-        n = read_buf(s->strm, (charf *)s->window + s->strstart + s->lookahead,
-                     more);
+        n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
         s->lookahead += n;
 
         /* Initialize the hash value now that we have some input: */
@@ -1107,14 +1178,15 @@ local block_state deflate_fast(s, flush)
         if (s->match_length >= MIN_MATCH) {
             check_match(s, s->strstart, s->match_start, s->match_length);
 
-            bflush = _tr_tally(s, s->strstart - s->match_start,
-                               s->match_length - MIN_MATCH);
+            _tr_tally_dist(s, s->strstart - s->match_start,
+                           s->match_length - MIN_MATCH, bflush);
 
             s->lookahead -= s->match_length;
 
             /* Insert new strings in the hash table only if the match length
              * is not too large. This saves time but degrades compression.
              */
+#ifndef FASTEST
             if (s->match_length <= s->max_insert_length &&
                 s->lookahead >= MIN_MATCH) {
                 s->match_length--; /* string at strstart already in hash table */
@@ -1126,7 +1198,9 @@ local block_state deflate_fast(s, flush)
                      */
                 } while (--s->match_length != 0);
                 s->strstart++; 
-            } else {
+            } else
+#endif
+	    {
                 s->strstart += s->match_length;
                 s->match_length = 0;
                 s->ins_h = s->window[s->strstart];
@@ -1141,7 +1215,7 @@ local block_state deflate_fast(s, flush)
         } else {
             /* No match, output a literal byte */
             Tracevv((stderr,"%c", s->window[s->strstart]));
-            bflush = _tr_tally (s, 0, s->window[s->strstart]);
+            _tr_tally_lit (s, s->window[s->strstart], bflush);
             s->lookahead--;
             s->strstart++; 
         }
@@ -1220,8 +1294,8 @@ local block_state deflate_slow(s, flush)
 
             check_match(s, s->strstart-1, s->prev_match, s->prev_length);
 
-            bflush = _tr_tally(s, s->strstart -1 - s->prev_match,
-                               s->prev_length - MIN_MATCH);
+            _tr_tally_dist(s, s->strstart -1 - s->prev_match,
+			   s->prev_length - MIN_MATCH, bflush);
 
             /* Insert in hash table all strings up to the end of the match.
              * strstart-1 and strstart are already inserted. If there is not
@@ -1247,7 +1321,8 @@ local block_state deflate_slow(s, flush)
              * is longer, truncate the previous match to a single literal.
              */
             Tracevv((stderr,"%c", s->window[s->strstart-1]));
-            if (_tr_tally (s, 0, s->window[s->strstart-1])) {
+	    _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+	    if (bflush) {
                 FLUSH_BLOCK_ONLY(s, 0);
             }
             s->strstart++;
@@ -1265,7 +1340,7 @@ local block_state deflate_slow(s, flush)
     Assert (flush != Z_NO_FLUSH, "no flush?");
     if (s->match_available) {
         Tracevv((stderr,"%c", s->window[s->strstart-1]));
-        _tr_tally (s, 0, s->window[s->strstart-1]);
+        _tr_tally_lit(s, s->window[s->strstart-1], bflush);
         s->match_available = 0;
     }
     FLUSH_BLOCK(s, flush == Z_FINISH);

deflate.h

@@ -273,4 +273,46 @@ ulg  _tr_flush_block  OF((deflate_state *s, charf *buf, ulg stored_len,
 void _tr_align        OF((deflate_state *s));
 void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
                           int eof));
+
+#define d_code(dist) \
+   ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
+/* Mapping from a distance to a distance code. dist is the distance - 1 and
+ * must not have side effects. _dist_code[256] and _dist_code[257] are never
+ * used.
+ */
+
+#ifndef DEBUG
+/* Inline versions of _tr_tally for speed: */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+  extern uch _length_code[];
+  extern uch _dist_code[];
+#else
+  extern const uch _length_code[];
+  extern const uch _dist_code[];
+#endif
+
+# define _tr_tally_lit(s, c, flush) \
+  { uch cc = (c); \
+    s->d_buf[s->last_lit] = 0; \
+    s->l_buf[s->last_lit++] = cc; \
+    s->dyn_ltree[cc].Freq++; \
+    flush = (s->last_lit == s->lit_bufsize-1); \
+   }
+# define _tr_tally_dist(s, distance, length, flush) \
+  { uch len = (length); \
+    ush dist = (distance); \
+    s->d_buf[s->last_lit] = dist; \
+    s->l_buf[s->last_lit++] = len; \
+    dist--; \
+    s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
+    s->dyn_dtree[d_code(dist)].Freq++; \
+    flush = (s->last_lit == s->lit_bufsize-1); \
+  }
+#else
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
+# define _tr_tally_dist(s, distance, length, flush) \
+              flush = _tr_tally(s, distance, length) 
+#endif
+
 #endif

example.c

@@ -41,7 +41,7 @@ void test_large_deflate OF((Byte *compr, uLong comprLen,
 		            Byte *uncompr, uLong uncomprLen));
 void test_large_inflate OF((Byte *compr, uLong comprLen,
 		            Byte *uncompr, uLong uncomprLen));
-void test_flush         OF((Byte *compr, uLong comprLen));
+void test_flush         OF((Byte *compr, uLong *comprLen));
 void test_sync          OF((Byte *compr, uLong comprLen,
 		            Byte *uncompr, uLong uncomprLen));
 void test_dict_deflate  OF((Byte *compr, uLong comprLen));
@@ -69,6 +69,7 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
 
     if (strcmp((char*)uncompr, hello)) {
         fprintf(stderr, "bad uncompress\n");
+	exit(1);
     } else {
         printf("uncompress(): %s\n", uncompr);
     }
@@ -93,8 +94,14 @@ void test_gzio(out, in, uncompr, uncomprLen)
         fprintf(stderr, "gzopen error\n");
         exit(1);
     }
-    if (gzprintf(file, "%s, %s!", "hello", "hello") != len-1) {
+    gzputc(file, 'h');
+    if (gzputs(file, "ello") != 4) {
+        fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
+	exit(1);
+    }
+    if (gzprintf(file, ", %s!", "hello") != 8) {
         fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
+	exit(1);
     }
     gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
     gzclose(file);
@@ -108,26 +115,38 @@ void test_gzio(out, in, uncompr, uncomprLen)
     uncomprLen = gzread(file, uncompr, (unsigned)uncomprLen);
     if (uncomprLen != len) {
         fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
+	exit(1);
     }
     if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad gzread\n");
+        fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
+	exit(1);
     } else {
         printf("gzread(): %s\n", uncompr);
     }
 
-    pos = gzseek(file, -7L, SEEK_CUR);
-    if (pos != 7 || gztell(file) != pos) {
+    pos = gzseek(file, -8L, SEEK_CUR);
+    if (pos != 6 || gztell(file) != pos) {
 	fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
 		pos, gztell(file));
+	exit(1);
     }
-    uncomprLen = gzread(file, uncompr, (unsigned)uncomprLen);
-    if (uncomprLen != 7) {
-        fprintf(stderr, "gzread err after gzseek: %s\n", gzerror(file, &err));
+
+    if (gzgetc(file) != ' ') {
+	fprintf(stderr, "gzgetc error\n");
+	exit(1);
+    }
+
+    gzgets(file, (char*)uncompr, uncomprLen);
+    uncomprLen = strlen((char*)uncompr);
+    if (uncomprLen != 6) { /* "hello!" */
+        fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
+	exit(1);
     }
     if (strcmp((char*)uncompr, hello+7)) {
-        fprintf(stderr, "bad gzread after gzseek\n");
+        fprintf(stderr, "bad gzgets after gzseek\n");
+	exit(1);
     } else {
-        printf("gzread() after gzseek: %s\n", uncompr);
+        printf("gzgets() after gzseek: %s\n", uncompr);
     }
 
     gzclose(file);
@@ -206,6 +225,7 @@ void test_inflate(compr, comprLen, uncompr, uncomprLen)
 
     if (strcmp((char*)uncompr, hello)) {
         fprintf(stderr, "bad inflate\n");
+	exit(1);
     } else {
         printf("inflate(): %s\n", uncompr);
     }
@@ -240,6 +260,7 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
     CHECK_ERR(err, "deflate");
     if (c_stream.avail_in != 0) {
         fprintf(stderr, "deflate not greedy\n");
+	exit(1);
     }
 
     /* Feed in already compressed data and switch to no compression: */
@@ -259,6 +280,7 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
     err = deflate(&c_stream, Z_FINISH);
     if (err != Z_STREAM_END) {
         fprintf(stderr, "deflate should report Z_STREAM_END\n");
+	exit(1);
     }
     err = deflateEnd(&c_stream);
     CHECK_ERR(err, "deflateEnd");
@@ -299,6 +321,7 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
 
     if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
         fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
+	exit(1);
     } else {
         printf("large_inflate(): OK\n");
     }
@@ -309,7 +332,7 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
  */
 void test_flush(compr, comprLen)
     Byte *compr;
-    uLong comprLen;
+    uLong *comprLen;
 {
     z_stream c_stream; /* compression stream */
     int err;
@@ -325,7 +348,7 @@ void test_flush(compr, comprLen)
     c_stream.next_in  = (Bytef*)hello;
     c_stream.next_out = compr;
     c_stream.avail_in = 3;
-    c_stream.avail_out = (uInt)comprLen;
+    c_stream.avail_out = (uInt)*comprLen;
     err = deflate(&c_stream, Z_FULL_FLUSH);
     CHECK_ERR(err, "deflate");
 
@@ -338,6 +361,8 @@ void test_flush(compr, comprLen)
     }
     err = deflateEnd(&c_stream);
     CHECK_ERR(err, "deflateEnd");
+
+    *comprLen = c_stream.total_out;
 }
 
 /* ===========================================================================
@@ -376,6 +401,7 @@ void test_sync(compr, comprLen, uncompr, uncomprLen)
     if (err != Z_DATA_ERROR) {
         fprintf(stderr, "inflate should report DATA_ERROR\n");
         /* Because of incorrect adler32 */
+	exit(1);
     }
     err = inflateEnd(&d_stream);
     CHECK_ERR(err, "inflateEnd");
@@ -414,6 +440,7 @@ void test_dict_deflate(compr, comprLen)
     err = deflate(&c_stream, Z_FINISH);
     if (err != Z_STREAM_END) {
         fprintf(stderr, "deflate should report Z_STREAM_END\n");
+	exit(1);
     }
     err = deflateEnd(&c_stream);
     CHECK_ERR(err, "deflateEnd");
@@ -463,6 +490,7 @@ void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
 
     if (strcmp((char*)uncompr, hello)) {
         fprintf(stderr, "bad inflate with dict\n");
+	exit(1);
     } else {
         printf("inflate with dictionary: %s\n", uncompr);
     }
@@ -510,8 +538,9 @@ int main(argc, argv)
     test_large_deflate(compr, comprLen, uncompr, uncomprLen);
     test_large_inflate(compr, comprLen, uncompr, uncomprLen);
 
-    test_flush(compr, comprLen);
+    test_flush(compr, &comprLen);
     test_sync(compr, comprLen, uncompr, uncomprLen);
+    comprLen = uncomprLen;
 
     test_dict_deflate(compr, comprLen);
     test_dict_inflate(compr, comprLen, uncompr, uncomprLen);

gzio.c

@@ -13,7 +13,8 @@
 
 struct internal_state {int dummy;}; /* for buggy compilers */
 
-#define Z_BUFSIZE 4096
+#define Z_BUFSIZE       16384
+#define Z_PRINTF_BUFSIZE 4096
 
 #define ALLOC(size) malloc(size)
 #define TRYFREE(p) {if (p) free(p);}
@@ -150,7 +151,12 @@ local gzFile gz_open (path, mode, fd)
          */
         fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
              Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
-	s->startpos = ftell(s->file);
+	s->startpos = 10L;
+	/* We use 10L instead of ftell(s->file) to because ftell causes an
+         * fflush on some systems. This version of the library doesn't use
+         * startpos anyway in write mode, so this initialization is not
+         * necessary.
+         */
     } else {
 	check_header(s); /* skip the .gz header */
 	s->startpos = (ftell(s->file) - s->stream.avail_in);
@@ -162,7 +168,7 @@ local gzFile gz_open (path, mode, fd)
 /* ===========================================================================
      Opens a gzip (.gz) file for reading or writing.
 */
-gzFile EXPORT gzopen (path, mode)
+gzFile ZEXPORT gzopen (path, mode)
     const char *path;
     const char *mode;
 {
@@ -173,7 +179,7 @@ gzFile EXPORT gzopen (path, mode)
      Associate a gzFile with the file descriptor fd. fd is not dup'ed here
    to mimic the behavio(u)r of fdopen.
 */
-gzFile EXPORT gzdopen (fd, mode)
+gzFile ZEXPORT gzdopen (fd, mode)
     int fd;
     const char *mode;
 {
@@ -188,7 +194,7 @@ gzFile EXPORT gzdopen (fd, mode)
 /* ===========================================================================
  * Update the compression level and strategy
  */
-int EXPORT gzsetparams (file, level, strategy)
+int ZEXPORT gzsetparams (file, level, strategy)
     gzFile file;
     int level;
     int strategy;
@@ -334,7 +340,7 @@ local int destroy (s)
      Reads the given number of uncompressed bytes from the compressed file.
    gzread returns the number of bytes actually read (0 for end of file).
 */
-int EXPORT gzread (file, buf, len)
+int ZEXPORT gzread (file, buf, len)
     gzFile file;
     voidp buf;
     unsigned len;
@@ -370,7 +376,10 @@ int EXPORT gzread (file, buf, len)
 		s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
 					     s->file);
 	    }
-	    return (int)(len - s->stream.avail_out);
+	    len -= s->stream.avail_out;
+	    s->stream.total_in  += (uLong)len;
+	    s->stream.total_out += (uLong)len;
+	    return (int)len;
 	}
         if (s->stream.avail_in == 0 && !s->z_eof) {
 
@@ -420,21 +429,44 @@ int EXPORT gzread (file, buf, len)
       Reads one byte from the compressed file. gzgetc returns this byte
    or -1 in case of end of file or error.
 */
-int EXPORT gzgetc(file)
+int ZEXPORT gzgetc(file)
     gzFile file;
 {
-    int c;
+    unsigned char c;
 
     return gzread(file, &c, 1) == 1 ? c : -1;
 }
 
 
+/* ===========================================================================
+      Reads bytes from the compressed file until len-1 characters are
+   read, or a newline character is read and transferred to buf, or an
+   end-of-file condition is encountered.  The string is then terminated
+   with a null character.
+      gzgets returns buf, or Z_NULL in case of error.
+
+      The current implementation is not optimized at all.
+*/
+char * ZEXPORT gzgets(file, buf, len)
+    gzFile file;
+    char *buf;
+    int len;
+{
+    char *b = buf;
+    if (buf == Z_NULL || len <= 0) return Z_NULL;
+
+    while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ;
+    *buf = '\0';
+    return b == buf && len > 0 ? Z_NULL : b;
+}
+
+
 #ifndef NO_DEFLATE
 /* ===========================================================================
      Writes the given number of uncompressed bytes into the compressed file.
    gzwrite returns the number of bytes actually written (0 in case of error).
 */
-int EXPORT gzwrite (file, buf, len)
+int ZEXPORT gzwrite (file, buf, len)
     gzFile file;
     const voidp buf;
     unsigned len;
@@ -473,33 +505,34 @@ int EXPORT gzwrite (file, buf, len)
 #ifdef STDC
 #include <stdarg.h>
 
-int EXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
+int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
 {
-    char buf[Z_BUFSIZE];
+    char buf[Z_PRINTF_BUFSIZE];
     va_list va;
     int len;
 
     va_start(va, format);
 #ifdef HAS_vsnprintf
-    len = vsnprintf(buf, sizeof(buf), format, va);
+    (void)vsnprintf(buf, sizeof(buf), format, va);
 #else
-    len = vsprintf(buf, format, va);
+    (void)vsprintf(buf, format, va);
 #endif
     va_end(va);
+    len = strlen(buf); /* some *sprintf don't return the nb of bytes written */
     if (len <= 0) return 0;
 
     return gzwrite(file, buf, (unsigned)len);
 }
 #else /* not ANSI C */
 
-int EXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
 	               a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
     gzFile file;
     const char *format;
     int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
 	a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
 {
-    char buf[Z_BUFSIZE];
+    char buf[Z_PRINTF_BUFSIZE];
     int len;
 
 #ifdef HAS_snprintf
@@ -520,11 +553,26 @@ int EXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
       Writes c, converted to an unsigned char, into the compressed file.
    gzputc returns the value that was written, or -1 in case of error.
 */
-int EXPORT gzputc(file, c)
+int ZEXPORT gzputc(file, c)
     gzFile file;
     int c;
 {
-    return gzwrite(file, &c, 1) == 1 ? c : -1;
+    unsigned char cc = (unsigned char) c; /* required for big endian systems */
+
+    return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1;
+}
+
+
+/* ===========================================================================
+      Writes the given null-terminated string to the compressed file, excluding
+   the terminating null character.
+      gzputs returns the number of characters written, or -1 in case of error.
+*/
+int ZEXPORT gzputs(file, s)
+    gzFile file;
+    const char *s;
+{
+    return gzwrite(file, (const voidp)s, (unsigned)strlen(s));
 }
 
 
@@ -571,7 +619,7 @@ local int do_flush (file, flush)
     return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
 }
 
-int EXPORT gzflush (file, flush)
+int ZEXPORT gzflush (file, flush)
      gzFile file;
      int flush;
 {
@@ -592,17 +640,17 @@ int EXPORT gzflush (file, flush)
       SEEK_END is not implemented, returns error.
       In this version of the library, gzseek can be extremely slow.
 */
-z_off_t EXPORT gzseek (file, offset, whence)
+z_off_t ZEXPORT gzseek (file, offset, whence)
     gzFile file;
     z_off_t offset;
     int whence;
 {
     gz_stream *s = (gz_stream*)file;
 
-    if (s == NULL || whence == SEEK_END || s->z_err == Z_ERRNO) return -1L;
-
-    s->z_err = Z_OK;
-    s->z_eof = 0;
+    if (s == NULL || whence == SEEK_END ||
+	s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
+	return -1L;
+    }
     
     if (s->mode == 'w') {
 #ifdef NO_DEFLATE
@@ -627,13 +675,11 @@ z_off_t EXPORT gzseek (file, offset, whence)
 
 	    offset -= size;
 	}
-	return s->stream.total_in;
+	return (z_off_t)s->stream.total_in;
 #endif
     }
     /* Rest of function is for reading only */
 
-    if (s->z_err == Z_DATA_ERROR) return -1L;
-
     /* compute absolute position */
     if (whence == SEEK_CUR) {
 	offset += s->stream.total_out;
@@ -644,7 +690,9 @@ z_off_t EXPORT gzseek (file, offset, whence)
 	/* map to fseek */
 	s->stream.avail_in = 0;
 	s->stream.next_in = s->inbuf;
-	if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
+        if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
+
+	s->stream.total_in = s->stream.total_out = (uLong)offset;
 	return offset;
     }
 
@@ -667,13 +715,13 @@ z_off_t EXPORT gzseek (file, offset, whence)
 	if (size <= 0) return -1L;
 	offset -= size;
     }
-    return s->stream.total_out;
+    return (z_off_t)s->stream.total_out;
 }
 
 /* ===========================================================================
      Rewinds input file. 
 */
-int EXPORT gzrewind (file)
+int ZEXPORT gzrewind (file)
     gzFile file;
 {
     gz_stream *s = (gz_stream*)file;
@@ -699,7 +747,7 @@ int EXPORT gzrewind (file)
    given compressed file. This position represents a number of bytes in the
    uncompressed data stream.
 */
-z_off_t EXPORT gztell (file)
+z_off_t ZEXPORT gztell (file)
     gzFile file;
 {
     return gzseek(file, 0L, SEEK_CUR);
@@ -709,7 +757,7 @@ z_off_t EXPORT gztell (file)
      Returns 1 when EOF has previously been detected reading the given
    input stream, otherwise zero.
 */
-int EXPORT gzeof (file)
+int ZEXPORT gzeof (file)
     gzFile file;
 {
     gz_stream *s = (gz_stream*)file;
@@ -752,7 +800,7 @@ local uLong getLong (s)
      Flushes all pending output if necessary, closes the compressed file
    and deallocates all the (de)compression state.
 */
-int EXPORT gzclose (file)
+int ZEXPORT gzclose (file)
     gzFile file;
 {
     int err;
@@ -781,7 +829,7 @@ int EXPORT gzclose (file)
    errnum is set to Z_ERRNO and the application may consult errno
    to get the exact error code.
 */
-const char*  EXPORT gzerror (file, errnum)
+const char*  ZEXPORT gzerror (file, errnum)
     gzFile file;
     int *errnum;
 {

infblock.c

@@ -71,18 +71,14 @@ uLongf *c;
   if (s->mode == BTREE || s->mode == DTREE)
     ZFREE(z, s->sub.trees.blens);
   if (s->mode == CODES)
-  {
     inflate_codes_free(s->sub.decode.codes, z);
-    inflate_trees_free(s->sub.decode.td, z);
-    inflate_trees_free(s->sub.decode.tl, z);
-  }
   s->mode = TYPE;
   s->bitk = 0;
   s->bitb = 0;
   s->read = s->write = s->window;
   if (s->checkfn != Z_NULL)
     z->adler = s->check = (*s->checkfn)(0L, (const Bytef *)Z_NULL, 0);
-  Trace((stderr, "inflate:   blocks reset\n"));
+  Tracev((stderr, "inflate:   blocks reset\n"));
 }
 
 
@@ -96,23 +92,27 @@ uInt w;
   if ((s = (inflate_blocks_statef *)ZALLOC
        (z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
     return s;
+  if ((s->hufts =
+       (inflate_huft *)ZALLOC(z, sizeof(inflate_huft), MANY)) == Z_NULL)
+  {
+    ZFREE(z, s);
+    return Z_NULL;
+  }
   if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL)
   {
+    ZFREE(z, s->hufts);
     ZFREE(z, s);
     return Z_NULL;
   }
   s->end = s->window + w;
   s->checkfn = c;
   s->mode = TYPE;
-  Trace((stderr, "inflate:   blocks allocated\n"));
+  Tracev((stderr, "inflate:   blocks allocated\n"));
   inflate_blocks_reset(s, z, Z_NULL);
   return s;
 }
 
 
-#ifdef DEBUG
-  extern uInt inflate_hufts;
-#endif
 int inflate_blocks(s, z, r)
 inflate_blocks_statef *s;
 z_streamp z;
@@ -139,7 +139,7 @@ int r;
       switch (t >> 1)
       {
         case 0:                         /* stored */
-          Trace((stderr, "inflate:     stored block%s\n",
+          Tracev((stderr, "inflate:     stored block%s\n",
                  s->last ? " (last)" : ""));
           DUMPBITS(3)
           t = k & 7;                    /* go to byte boundary */
@@ -147,27 +147,25 @@ int r;
           s->mode = LENS;               /* get length of stored block */
           break;
         case 1:                         /* fixed */
-          Trace((stderr, "inflate:     fixed codes block%s\n",
+          Tracev((stderr, "inflate:     fixed codes block%s\n",
                  s->last ? " (last)" : ""));
           {
             uInt bl, bd;
             inflate_huft *tl, *td;
 
-            inflate_trees_fixed(&bl, &bd, &tl, &td);
+            inflate_trees_fixed(&bl, &bd, &tl, &td, z);
             s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
             if (s->sub.decode.codes == Z_NULL)
             {
               r = Z_MEM_ERROR;
               LEAVE
             }
-            s->sub.decode.tl = Z_NULL;  /* don't try to free these */
-            s->sub.decode.td = Z_NULL;
           }
           DUMPBITS(3)
           s->mode = CODES;
           break;
         case 2:                         /* dynamic */
-          Trace((stderr, "inflate:     dynamic codes block%s\n",
+          Tracev((stderr, "inflate:     dynamic codes block%s\n",
                  s->last ? " (last)" : ""));
           DUMPBITS(3)
           s->mode = TABLE;
@@ -244,7 +242,7 @@ int r;
         s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
       s->sub.trees.bb = 7;
       t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
-                             &s->sub.trees.tb, z);
+                             &s->sub.trees.tb, s->hufts, z);
       if (t != Z_OK)
       {
         ZFREE(z, s->sub.trees.blens);
@@ -286,7 +284,6 @@ int r;
           if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
               (c == 16 && i < 1))
           {
-            inflate_trees_free(s->sub.trees.tb, z);
             ZFREE(z, s->sub.trees.blens);
             s->mode = BAD;
             z->msg = (char*)"invalid bit length repeat";
@@ -300,7 +297,6 @@ int r;
           s->sub.trees.index = i;
         }
       }
-      inflate_trees_free(s->sub.trees.tb, z);
       s->sub.trees.tb = Z_NULL;
       {
         uInt bl, bd;
@@ -310,11 +306,9 @@ int r;
         bl = 9;         /* must be <= 9 for lookahead assumptions */
         bd = 6;         /* must be <= 9 for lookahead assumptions */
         t = s->sub.trees.table;
-#ifdef DEBUG
-      inflate_hufts = 0;
-#endif
         t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
-                                  s->sub.trees.blens, &bl, &bd, &tl, &td, z);
+                                  s->sub.trees.blens, &bl, &bd, &tl, &td,
+                                  s->hufts, z);
         ZFREE(z, s->sub.trees.blens);
         if (t != Z_OK)
         {
@@ -323,18 +317,13 @@ int r;
           r = t;
           LEAVE
         }
-        Tracev((stderr, "inflate:       trees ok, %d * %d bytes used\n",
-              inflate_hufts, sizeof(inflate_huft)));
+        Tracev((stderr, "inflate:       trees ok\n"));
         if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
         {
-          inflate_trees_free(td, z);
-          inflate_trees_free(tl, z);
           r = Z_MEM_ERROR;
           LEAVE
         }
         s->sub.decode.codes = c;
-        s->sub.decode.tl = tl;
-        s->sub.decode.td = td;
       }
       s->mode = CODES;
     case CODES:
@@ -343,8 +332,6 @@ int r;
         return inflate_flush(s, z, r);
       r = Z_OK;
       inflate_codes_free(s->sub.decode.codes, z);
-      inflate_trees_free(s->sub.decode.td, z);
-      inflate_trees_free(s->sub.decode.tl, z);
       LOAD
       Tracev((stderr, "inflate:       codes end, %lu total out\n",
               z->total_out + (q >= s->read ? q - s->read :
@@ -386,8 +373,9 @@ z_streamp z;
 {
   inflate_blocks_reset(s, z, Z_NULL);
   ZFREE(z, s->window);
+  ZFREE(z, s->hufts);
   ZFREE(z, s);
-  Trace((stderr, "inflate:   blocks freed\n"));
+  Tracev((stderr, "inflate:   blocks freed\n"));
   return Z_OK;
 }
 
@@ -397,7 +385,7 @@ inflate_blocks_statef *s;
 const Bytef *d;
 uInt  n;
 {
-  zmemcpy((charf *)s->window, d, n);
+  zmemcpy(s->window, d, n);
   s->read = s->write = s->window + n;
 }
 

inflate.c

@@ -50,7 +50,7 @@ struct internal_state {
 };
 
 
-int EXPORT inflateReset(z)
+int ZEXPORT inflateReset(z)
 z_streamp z;
 {
   if (z == Z_NULL || z->state == Z_NULL)
@@ -64,7 +64,7 @@ z_streamp z;
 }
 
 
-int EXPORT inflateEnd(z)
+int ZEXPORT inflateEnd(z)
 z_streamp z;
 {
   if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
@@ -78,7 +78,7 @@ z_streamp z;
 }
 
 
-int EXPORT inflateInit2_(z, w, version, stream_size)
+int ZEXPORT inflateInit2_(z, w, version, stream_size)
 z_streamp z;
 int w;
 const char *version;
@@ -135,7 +135,7 @@ int stream_size;
 }
 
 
-int EXPORT inflateInit_(z, version, stream_size)
+int ZEXPORT inflateInit_(z, version, stream_size)
 z_streamp z;
 const char *version;
 int stream_size;
@@ -144,18 +144,19 @@ int stream_size;
 }
 
 
-#define NEEDBYTE {if(z->avail_in==0)return r; if (f != Z_FINISH) r = Z_OK;}
+#define NEEDBYTE {if(z->avail_in==0)return r;r=f;}
 #define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
 
-int EXPORT inflate(z, f)
+int ZEXPORT inflate(z, f)
 z_streamp z;
 int f;
 {
   int r;
   uInt b;
 
-  if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL || f < 0)
+  if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL)
     return Z_STREAM_ERROR;
+  f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
   r = Z_BUF_ERROR;
   while (1) switch (z->state->mode)
   {
@@ -190,7 +191,7 @@ int f;
       if (!(b & PRESET_DICT))
       {
         z->state->mode = BLOCKS;
-	break;
+        break;
       }
       z->state->mode = DICT4;
     case DICT4:
@@ -224,9 +225,11 @@ int f;
         z->state->sub.marker = 0;       /* can try inflateSync */
         break;
       }
+      if (r == Z_OK)
+        r = f;
       if (r != Z_STREAM_END)
-        return f == Z_FINISH && r == Z_OK ? Z_BUF_ERROR : r;
-      r = Z_OK;
+        return r;
+      r = f;
       inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
       if (z->state->nowrap)
       {
@@ -234,7 +237,6 @@ int f;
         break;
       }
       z->state->mode = CHECK4;
-      if (f == Z_FINISH) r = Z_BUF_ERROR;
     case CHECK4:
       NEEDBYTE
       z->state->sub.check.need = (uLong)NEXTBYTE << 24;
@@ -273,7 +275,7 @@ int f;
 }
 
 
-int EXPORT inflateSetDictionary(z, dictionary, dictLength)
+int ZEXPORT inflateSetDictionary(z, dictionary, dictLength)
 z_streamp z;
 const Bytef *dictionary;
 uInt  dictLength;
@@ -297,7 +299,7 @@ uInt  dictLength;
 }
 
 
-int EXPORT inflateSync(z)
+int ZEXPORT inflateSync(z)
 z_streamp z;
 {
   uInt n;       /* number of bytes to look at */
@@ -321,7 +323,8 @@ z_streamp z;
   /* search */
   while (n && m < 4)
   {
-    if (*p == (Byte)(m < 2 ? 0 : 0xff))
+    static const Byte mark[4] = {0, 0, 0xff, 0xff};
+    if (*p == mark[m])
       m++;
     else if (*p)
       m = 0;
@@ -354,7 +357,7 @@ z_streamp z;
  * decompressing, PPP checks that at the end of input packet, inflate is
  * waiting for these length bytes.
  */
-int EXPORT inflateSyncPoint(z)
+int ZEXPORT inflateSyncPoint(z)
 z_streamp z;
 {
   if (z == Z_NULL || z->state == Z_NULL || z->state->blocks == Z_NULL)

inftrees.c

@@ -7,7 +7,7 @@
 #include "inftrees.h"
 
 const char inflate_copyright[] =
-   " inflate 1.0.7 Copyright 1995-1998 Mark Adler ";
+   " inflate 1.1.1 Copyright 1995-1998 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
@@ -31,12 +31,9 @@ local int huft_build OF((
     const uIntf *,      /* list of extra bits for non-simple codes */
     inflate_huft * FAR*,/* result: starting table */
     uIntf *,            /* maximum lookup bits (returns actual) */
-    z_streamp ));       /* for zalloc function */
-
-local voidpf falloc OF((
-    voidpf,             /* opaque pointer (not used) */
-    uInt,               /* number of items */
-    uInt));             /* size of item */
+    inflate_huft *,     /* space for trees */
+    uInt *,             /* hufts used in space */
+    uIntf * ));         /* space for values */
 
 /* Tables for deflate from PKZIP's appnote.txt. */
 local const uInt cplens[31] = { /* Copy lengths for literal codes 257..285 */
@@ -90,21 +87,18 @@ local const uInt cpdext[30] = { /* Extra bits for distance codes */
 
 /* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
 #define BMAX 15         /* maximum bit length of any code */
-#define N_MAX 288       /* maximum number of codes in any set */
 
-#ifdef DEBUG
-  uInt inflate_hufts;
-#endif
-
-local int huft_build(b, n, s, d, e, t, m, zs)
+local int huft_build(b, n, s, d, e, t, m, hp, hn, v)
 uIntf *b;               /* code lengths in bits (all assumed <= BMAX) */
-uInt n;                 /* number of codes (assumed <= N_MAX) */
+uInt n;                 /* number of codes (assumed <= 288) */
 uInt s;                 /* number of simple-valued codes (0..s-1) */
 const uIntf *d;         /* list of base values for non-simple codes */
 const uIntf *e;         /* list of extra bits for non-simple codes */
 inflate_huft * FAR *t;  /* result: starting table */
 uIntf *m;               /* maximum lookup bits, returns actual */
-z_streamp zs;           /* for zalloc function */
+inflate_huft *hp;       /* space for trees */
+uInt *hn;               /* hufts used in space */
+uIntf *v;               /* working area: values in order of bit length */
 /* Given a list of code lengths and a maximum table size, make a set of
    tables to decode that set of codes.  Return Z_OK on success, Z_BUF_ERROR
    if the given code set is incomplete (the tables are still built in this
@@ -121,11 +115,11 @@ z_streamp zs;           /* for zalloc function */
   register uInt j;              /* counter */
   register int k;               /* number of bits in current code */
   int l;                        /* bits per table (returned in m) */
+  uInt mask;                    /* (1 << w) - 1, to avoid cc -O bug on HP */
   register uIntf *p;            /* pointer into c[], b[], or v[] */
   inflate_huft *q;              /* points to current table */
   struct inflate_huft_s r;      /* table entry for structure assignment */
   inflate_huft *u[BMAX];        /* table stack */
-  uInt v[N_MAX];                /* values in order of bit length */
   register int w;               /* bits before this table == (l * h) */
   uInt x[BMAX+1];               /* bit offsets, then code stack */
   uIntf *xp;                    /* pointer into x */
@@ -233,20 +227,16 @@ z_streamp zs;           /* for zalloc function */
         }
         z = 1 << j;             /* table entries for j-bit table */
 
-        /* allocate and link in new table */
-        if ((q = (inflate_huft *)ZALLOC
-             (zs,z + 1,sizeof(inflate_huft))) == Z_NULL)
-        {
-          if (h)
-            inflate_trees_free(u[0], zs);
+        /* allocate new table */
+        if (*hn + z > MANY)     /* (note: doesn't matter for fixed) */
           return Z_MEM_ERROR;   /* not enough memory */
+        u[h] = q = hp + *hn;
+        *hn += z;
+        if (t != Z_NULL)        /* first table is returned result */
+        {
+          *t = q;
+          t = Z_NULL;
         }
-#ifdef DEBUG
-        inflate_hufts += z + 1;
-#endif
-        *t = q + 1;             /* link to list for huft_free() */
-        *(t = &(q->next)) = Z_NULL;
-        u[h] = ++q;             /* table starts after link */
 
         /* connect to last table, if there is one */
         if (h)
@@ -286,10 +276,12 @@ z_streamp zs;           /* for zalloc function */
       i ^= j;
 
       /* backup over finished tables */
-      while ((i & ((1 << w) - 1)) != x[h])
+      mask = (1 << w) - 1;      /* needed on HP, cc -O bug */
+      while ((i & mask) != x[h])
       {
         h--;                    /* don't need to update q */
         w -= l;
+        mask = (1 << w) - 1;
       }
     }
   }
@@ -300,28 +292,34 @@ z_streamp zs;           /* for zalloc function */
 }
 
 
-int inflate_trees_bits(c, bb, tb, z)
+int inflate_trees_bits(c, bb, tb, hp, z)
 uIntf *c;               /* 19 code lengths */
 uIntf *bb;              /* bits tree desired/actual depth */
 inflate_huft * FAR *tb; /* bits tree result */
-z_streamp z;            /* for zfree function */
+inflate_huft *hp;       /* space for trees */
+z_streamp z;            /* for messages */
 {
   int r;
+  uInt hn = 0;          /* hufts used in space */
+  uIntf *v;             /* work area for huft_build */
 
-  r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL, tb, bb, z);
+  if ((v = (uIntf*)ZALLOC(z, 19, sizeof(uInt))) == Z_NULL)
+    return Z_MEM_ERROR;
+  r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL,
+                 tb, bb, hp, &hn, v);
   if (r == Z_DATA_ERROR)
     z->msg = (char*)"oversubscribed dynamic bit lengths tree";
   else if (r == Z_BUF_ERROR || *bb == 0)
   {
-    inflate_trees_free(*tb, z);
     z->msg = (char*)"incomplete dynamic bit lengths tree";
     r = Z_DATA_ERROR;
   }
+  ZFREE(z, v);
   return r;
 }
 
 
-int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, z)
+int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, hp, z)
 uInt nl;                /* number of literal/length codes */
 uInt nd;                /* number of distance codes */
 uIntf *c;               /* that many (total) code lengths */
@@ -329,27 +327,34 @@ uIntf *bl;              /* literal desired/actual bit depth */
 uIntf *bd;              /* distance desired/actual bit depth */
 inflate_huft * FAR *tl; /* literal/length tree result */
 inflate_huft * FAR *td; /* distance tree result */
-z_streamp z;            /* for zfree function */
+inflate_huft *hp;       /* space for trees */
+z_streamp z;            /* for messages */
 {
   int r;
+  uInt hn = 0;          /* hufts used in space */
+  uIntf *v;             /* work area for huft_build */
+
+  /* allocate work area */
+  if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
+    return Z_MEM_ERROR;
 
   /* build literal/length tree */
-  r = huft_build(c, nl, 257, cplens, cplext, tl, bl, z);
+  r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
   if (r != Z_OK || *bl == 0)
   {
     if (r == Z_DATA_ERROR)
       z->msg = (char*)"oversubscribed literal/length tree";
     else if (r != Z_MEM_ERROR)
     {
-      inflate_trees_free(*tl, z);
       z->msg = (char*)"incomplete literal/length tree";
       r = Z_DATA_ERROR;
     }
+    ZFREE(z, v);
     return r;
   }
 
   /* build distance tree */
-  r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, z);
+  r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
   if (r != Z_OK || (*bd == 0 && nl > 257))
   {
     if (r == Z_DATA_ERROR)
@@ -359,7 +364,6 @@ z_streamp z;            /* for zfree function */
       r = Z_OK;
     }
 #else
-      inflate_trees_free(*td, z);
       z->msg = (char*)"incomplete distance tree";
       r = Z_DATA_ERROR;
     }
@@ -368,19 +372,20 @@ z_streamp z;            /* for zfree function */
       z->msg = (char*)"empty distance tree with lengths";
       r = Z_DATA_ERROR;
     }
-    inflate_trees_free(*tl, z);
+    ZFREE(z, v);
     return r;
 #endif
   }
 
   /* done */
+  ZFREE(z, v);
   return Z_OK;
 }
 
 
 /* build fixed tables only once--keep them here */
 local int fixed_built = 0;
-#define FIXEDH 530      /* number of hufts used by fixed tables */
+#define FIXEDH 424      /* number of hufts used by fixed tables */
 local inflate_huft fixed_mem[FIXEDH];
 local uInt fixed_bl;
 local uInt fixed_bd;
@@ -388,36 +393,29 @@ local inflate_huft *fixed_tl;
 local inflate_huft *fixed_td;
 
 
-local voidpf falloc(q, n, s)
-voidpf q;       /* opaque pointer */
-uInt n;         /* number of items */
-uInt s;         /* size of item */
-{
-  Assert(s == sizeof(inflate_huft) && n <= *(intf *)q,
-         "inflate_trees falloc overflow");
-  *(intf *)q -= n+s-s; /* s-s to avoid warning */
-  return (voidpf)(fixed_mem + *(intf *)q);
-}
-
-
-int inflate_trees_fixed(bl, bd, tl, td)
+int inflate_trees_fixed(bl, bd, tl, td, z)
 uIntf *bl;               /* literal desired/actual bit depth */
 uIntf *bd;               /* distance desired/actual bit depth */
 inflate_huft * FAR *tl;  /* literal/length tree result */
 inflate_huft * FAR *td;  /* distance tree result */
+z_streamp z;             /* for memory allocation */
 {
   /* build fixed tables if not already (multiple overlapped executions ok) */
   if (!fixed_built)
   {
     int k;              /* temporary variable */
-    unsigned c[288];    /* length list for huft_build */
-    z_stream z;         /* for falloc function */
-    int f = FIXEDH;     /* number of hufts left in fixed_mem */
+    uInt f = 0;         /* number of hufts used in fixed_mem */
+    uIntf *c;           /* length list for huft_build */
+    uIntf *v;           /* work area for huft_build */
 
-    /* set up fake z_stream for memory routines */
-    z.zalloc = falloc;
-    z.zfree = Z_NULL;
-    z.opaque = (voidpf)&f;
+    /* allocate memory */
+    if ((c = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
+      return Z_MEM_ERROR;
+    if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
+    {
+      ZFREE(z, c);
+      return Z_MEM_ERROR;
+    }
 
     /* literal table */
     for (k = 0; k < 144; k++)
@@ -429,16 +427,19 @@ inflate_huft * FAR *td;  /* distance tree result */
     for (; k < 288; k++)
       c[k] = 8;
     fixed_bl = 7;
-    huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl, &z);
+    huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl,
+               fixed_mem, &f, v);
 
     /* distance table */
     for (k = 0; k < 30; k++)
       c[k] = 5;
     fixed_bd = 5;
-    huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd, &z);
+    huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd,
+               fixed_mem, &f, v);
 
     /* done */
-    Assert(f == 0, "invalid build of fixed tables");
+    ZFREE(z, v);
+    ZFREE(z, c);
     fixed_built = 1;
   }
   *bl = fixed_bl;
@@ -447,33 +448,3 @@ inflate_huft * FAR *td;  /* distance tree result */
   *td = fixed_td;
   return Z_OK;
 }
-
-
-int inflate_trees_free(t, z)
-inflate_huft *t;        /* table to free */
-z_streamp z;            /* for zfree function */
-/* Free the malloc'ed tables built by huft_build(), which makes a linked
-   list of the tables it made, with the links in a dummy first entry of
-   each table. */
-{
-  register inflate_huft *p, *q, *r;
-
-  /* Reverse linked list */
-  p = Z_NULL;
-  q = t;
-  while (q != Z_NULL)
-  {
-    r = (q - 1)->next;
-    (q - 1)->next = p;
-    p = q;
-    q = r;
-  }
-  /* Go through linked list, freeing from the malloced (t[-1]) address. */
-  while (p != Z_NULL)
-  {
-    q = (--p)->next;
-    ZFREE(z,p);
-    p = q;
-  } 
-  return Z_OK;
-}

inftrees.h

@@ -27,15 +27,19 @@ struct inflate_huft_s {
   } more;
 };
 
-#ifdef DEBUG
-  extern uInt inflate_hufts;
-#endif
+/* Maximum size of dynamic tree.  The maximum found in a long but non-
+   exhaustive search was 1041 huft structures (875 for length/literals
+   and 166 for distances, the latter actually the result of an
+   exhaustive search).  The actual maximum is not known, but the
+   value below is more than safe. */
+#define MANY 1440
 
 extern int inflate_trees_bits OF((
     uIntf *,                    /* 19 code lengths */
     uIntf *,                    /* bits tree desired/actual depth */
     inflate_huft * FAR *,       /* bits tree result */
-    z_streamp ));               /* for zalloc, zfree functions */
+    inflate_huft *,             /* space for trees */
+    z_streamp));                /* for messages */
 
 extern int inflate_trees_dynamic OF((
     uInt,                       /* number of literal/length codes */
@@ -45,15 +49,12 @@ extern int inflate_trees_dynamic OF((
     uIntf *,                    /* distance desired/actual bit depth */
     inflate_huft * FAR *,       /* literal/length tree result */
     inflate_huft * FAR *,       /* distance tree result */
-    z_streamp ));               /* for zalloc, zfree functions */
+    inflate_huft *,             /* space for trees */
+    z_streamp));                /* for messages */
 
 extern int inflate_trees_fixed OF((
     uIntf *,                    /* literal desired/actual bit depth */
     uIntf *,                    /* distance desired/actual bit depth */
     inflate_huft * FAR *,       /* literal/length tree result */
-    inflate_huft * FAR *));     /* distance tree result */
-
-extern int inflate_trees_free OF((
-    inflate_huft *,             /* tables to free */
-    z_streamp ));               /* for zfree function */
-
+    inflate_huft * FAR *,       /* distance tree result */
+    z_streamp));                /* for memory allocation */

infutil.h

@@ -41,8 +41,6 @@ struct inflate_blocks_state {
       inflate_huft *tb;         /* bit length decoding tree */
     } trees;            /* if DTREE, decoding info for trees */
     struct {
-      inflate_huft *tl;
-      inflate_huft *td;         /* trees to free */
       inflate_codes_statef 
          *codes;
     } decode;           /* if CODES, current state */
@@ -52,6 +50,7 @@ struct inflate_blocks_state {
   /* mode independent information */
   uInt bitk;            /* bits in bit buffer */
   uLong bitb;           /* bit buffer */
+  inflate_huft *hufts;  /* single malloc for tree space */
   Bytef *window;        /* sliding window */
   Bytef *end;           /* one byte after sliding window */
   Bytef *read;          /* window read pointer */

minigzip.c

@@ -25,6 +25,11 @@
    extern void exit  OF((int));
 #endif
 
+#ifdef USE_MMAP
+#  include <sys/types.h>
+#  include <sys/mman.h>
+#  include <sys/stat.h>
+#endif
 
 #if defined(MSDOS) || defined(OS2) || defined(WIN32)
 #  include <fcntl.h>
@@ -44,14 +49,16 @@
 #  define fileno(file) file->__file
 #endif
 
+#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
+  extern int unlink OF((const char *));
+#endif
+
 #ifndef GZ_SUFFIX
 #  define GZ_SUFFIX ".gz"
 #endif
 #define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
 
-extern int unlink OF((const char *));
-
-#define BUFLEN 4096
+#define BUFLEN      16384
 #define MAX_NAME_LEN 1024
 
 #ifdef MAXSEG_64K
@@ -63,12 +70,15 @@ extern int unlink OF((const char *));
 
 char *prog;
 
-void error           OF((const char *msg));
-void gz_compress     OF((FILE   *in, gzFile out));
-void gz_uncompress   OF((gzFile in, FILE   *out));
-void file_compress   OF((char  *file));
-void file_uncompress OF((char  *file));
-int  main            OF((int argc, char *argv[]));
+void error            OF((const char *msg));
+void gz_compress      OF((FILE   *in, gzFile out));
+#ifdef USE_MMAP
+int  gz_compress_mmap OF((FILE   *in, gzFile out));
+#endif
+void gz_uncompress    OF((gzFile in, FILE   *out));
+void file_compress    OF((char  *file, char *mode));
+void file_uncompress  OF((char  *file));
+int  main             OF((int argc, char *argv[]));
 
 /* ===========================================================================
  * Display error message and exit
@@ -83,6 +93,7 @@ void error(msg)
 /* ===========================================================================
  * Compress input to output then close both files.
  */
+
 void gz_compress(in, out)
     FILE   *in;
     gzFile out;
@@ -91,6 +102,12 @@ void gz_compress(in, out)
     int len;
     int err;
 
+#ifdef USE_MMAP
+    /* Try first compressing with mmap. If mmap fails (minigzip used in a
+     * pipe), use the normal fread loop.
+     */
+    if (gz_compress_mmap(in, out) == Z_OK) return;
+#endif
     for (;;) {
         len = fread(buf, 1, sizeof(buf), in);
         if (ferror(in)) {
@@ -105,6 +122,43 @@ void gz_compress(in, out)
     if (gzclose(out) != Z_OK) error("failed gzclose");
 }
 
+#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
+
+/* Try compressing the input file at once using mmap. Return Z_OK if
+ * if success, Z_ERRNO otherwise.
+ */
+int gz_compress_mmap(in, out)
+    FILE   *in;
+    gzFile out;
+{
+    int len;
+    int err;
+    int ifd = fileno(in);
+    caddr_t buf;    /* mmap'ed buffer for the entire input file */
+    off_t buf_len;  /* length of the input file */
+    struct stat sb;
+
+    /* Determine the size of the file, needed for mmap: */
+    if (fstat(ifd, &sb) < 0) return Z_ERRNO;
+    buf_len = sb.st_size;
+    if (buf_len <= 0) return Z_ERRNO;
+
+    /* Now do the actual mmap: */
+    buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0); 
+    if (buf == (caddr_t)(-1)) return Z_ERRNO;
+
+    /* Compress the whole file at once: */
+    len = gzwrite(out, (char *)buf, (unsigned)buf_len);
+
+    if (len != (int)buf_len) error(gzerror(out, &err));
+
+    munmap(buf, buf_len);
+    fclose(in);
+    if (gzclose(out) != Z_OK) error("failed gzclose");
+    return Z_OK;
+}
+#endif /* USE_MMAP */
+
 /* ===========================================================================
  * Uncompress input to output then close both files.
  */
@@ -135,8 +189,9 @@ void gz_uncompress(in, out)
  * Compress the given file: create a corresponding .gz file and remove the
  * original.
  */
-void file_compress(file)
+void file_compress(file, mode)
     char  *file;
+    char  *mode;
 {
     local char outfile[MAX_NAME_LEN];
     FILE  *in;
@@ -150,7 +205,7 @@ void file_compress(file)
         perror(file);
         exit(1);
     }
-    out = gzopen(outfile, "wb"); /* use "wb9" for maximal compression */
+    out = gzopen(outfile, mode);
     if (out == NULL) {
         fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
         exit(1);
@@ -253,7 +308,7 @@ int main(argc, argv)
             if (uncompr) {
                 file_uncompress(*argv);
             } else {
-                file_compress(*argv);
+                file_compress(*argv, outmode);
             }
         } while (argv++, --argc);
     }

msdos/Makefile.w32

@@ -0,0 +1,97 @@
+# Makefile for zlib
+# Microsoft 32-bit Visual C++ 4.0 or later (may work on earlier versions)
+
+# To use, do "nmake /f makefile.w32"
+
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to CFLAGS below: 
+#   -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Microsoft Visual C++ 4.0 and later -------------
+MODEL=
+CFLAGS=-Ox -GA3s -nologo -W3
+CC=cl
+LD=link
+LDFLAGS=
+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:  zlib.lib example.exe minigzip.exe
+
+adler32.obj: adler32.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zutil.h 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
+
+zlib.lib: $(OBJ1) $(OBJ2)
+  if exist zlib.lib del zlib.lib
+  lib /OUT:zlib.lib $(OBJ1) $(OBJ2)
+
+example.exe: example.obj zlib.lib
+  $(LD) $(LDFLAGS) example.obj zlib.lib /OUT:example.exe /SUBSYSTEM:CONSOLE
+
+minigzip.exe: minigzip.obj zlib.lib
+  $(LD) $(LDFLAGS) minigzip.obj zlib.lib /OUT:minigzip.exe /SUBSYSTEM:CONSOLE
+
+test: example.exe minigzip.exe
+  example
+  echo hello world | minigzip | minigzip -d 
+
+#clean:
+#  del *.obj
+#  del *.exe

msdos/zlib.def

@@ -8,7 +8,7 @@ SUBSYSTEM	WINDOWS
 
 STUB		'WINSTUB.EXE'
 
-VERSION		1.07
+VERSION		1.11
 
 CODE		 EXECUTE READ
 
@@ -55,3 +55,6 @@ EXPORTS
     zError                         @36
     inflateSyncPoint               @37
     get_crc_table                  @38
+    compress2                      @39
+    gzputs                         @40
+    gzgets                         @41

msdos/zlib.rc

@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,0,7,0
-  PRODUCTVERSION 1,0,7,0
+  FILEVERSION	 1,1,1,0
+  PRODUCTVERSION 1,1,1,0
   FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
   FILEFLAGS	0
   FILEOS	VOS_DOS_WINDOWS32
@@ -17,9 +17,9 @@ BEGIN
 
     BEGIN
       VALUE "FileDescription", "zlib data compression library\0"
-      VALUE "FileVersion",	"1.0.7\0"
+      VALUE "FileVersion",	"1.1.1\0"
       VALUE "InternalName",	"zlib\0"
-      VALUE "OriginalFilename",	"zlib.lib\0"
+      VALUE "OriginalFilename",	"zlib.dll\0"
       VALUE "ProductName",	"ZLib.DLL\0"
       VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
       VALUE "LegalCopyright", "(C) 1995-1998 Jean-loup Gailly & Mark Adler\0"

nt/zlib.dnt

@@ -42,3 +42,6 @@ EXPORTS
     zError                         @36
     inflateSyncPoint               @37
     get_crc_table                  @38
+    compress2                      @39
+    gzputs                         @40
+    gzgets                         @41

trees.c

@@ -31,6 +31,8 @@
 
 /* @(#) $Id$ */
 
+/* #define GEN_TREES_H */
+
 #include "deflate.h"
 
 #ifdef DEBUG
@@ -80,6 +82,11 @@ local const uch bl_order[BL_CODES]
  * Local data. These are initialized only once.
  */
 
+#define DIST_CODE_LEN  512 /* see definition of array dist_code below */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+/* non ANSI compilers may not accept trees.h */
+
 local ct_data static_ltree[L_CODES+2];
 /* The static literal tree. Since the bit lengths are imposed, there is no
  * need for the L_CODES extra codes used during heap construction. However
@@ -92,13 +99,13 @@ local ct_data static_dtree[D_CODES];
  * 5 bits.)
  */
 
-local uch dist_code[512];
-/* distance codes. The first 256 values correspond to the distances
+uch _dist_code[DIST_CODE_LEN];
+/* Distance codes. The first 256 values correspond to the distances
  * 3 .. 258, the last 256 values correspond to the top 8 bits of
  * the 15 bit distances.
  */
 
-local uch length_code[MAX_MATCH-MIN_MATCH+1];
+uch _length_code[MAX_MATCH-MIN_MATCH+1];
 /* length code for each normalized match length (0 == MIN_MATCH) */
 
 local int base_length[LENGTH_CODES];
@@ -107,8 +114,12 @@ local int base_length[LENGTH_CODES];
 local int base_dist[D_CODES];
 /* First normalized distance for each code (0 = distance of 1) */
 
+#else
+#  include "trees.h"
+#endif /* GEN_TREES_H */
+
 struct static_tree_desc_s {
-    ct_data *static_tree;        /* static tree or NULL */
+    const ct_data *static_tree;  /* static tree or NULL */
     const intf *extra_bits;      /* extra bits for each code or NULL */
     int     extra_base;          /* base index for extra_bits */
     int     elems;               /* max number of elements in the tree */
@@ -122,7 +133,7 @@ local static_tree_desc  static_d_desc =
 {static_dtree, extra_dbits, 0,          D_CODES, MAX_BITS};
 
 local static_tree_desc  static_bl_desc =
-{(ct_data *)0, extra_blbits, 0,      BL_CODES, MAX_BL_BITS};
+{(const ct_data *)0, extra_blbits, 0,   BL_CODES, MAX_BL_BITS};
 
 /* ===========================================================================
  * Local (static) routines in this file.
@@ -148,6 +159,10 @@ local void bi_flush       OF((deflate_state *s));
 local void copy_block     OF((deflate_state *s, charf *buf, unsigned len,
                               int header));
 
+#ifdef GEN_TREES_H
+local void gen_trees_header OF((void));
+#endif
+
 #ifndef DEBUG
 #  define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
    /* Send a code of the given tree. c and tree must not have side effects */
@@ -158,13 +173,6 @@ local void copy_block     OF((deflate_state *s, charf *buf, unsigned len,
        send_bits(s, tree[c].Code, tree[c].Len); }
 #endif
 
-#define d_code(dist) \
-   ((dist) < 256 ? dist_code[dist] : dist_code[256+((dist)>>7)])
-/* Mapping from a distance to a distance code. dist is the distance - 1 and
- * must not have side effects. dist_code[256] and dist_code[257] are never
- * used.
- */
-
 /* ===========================================================================
  * Output a short LSB first on the stream.
  * IN assertion: there is enough room in pendingBuf.
@@ -226,12 +234,11 @@ local void send_bits(s, value, length)
 /* the arguments must not have side effects */
 
 /* ===========================================================================
- * Initialize the various 'constant' tables. In a multi-threaded environment,
- * this function may be called by two threads concurrently, but this is
- * harmless since both invocations do exactly the same thing.
+ * Initialize the various 'constant' tables.
  */
 local void tr_static_init()
 {
+#if defined(GEN_TREES_H) || !defined(STDC)
     static int static_init_done = 0;
     int n;        /* iterates over tree elements */
     int bits;     /* bit counter */
@@ -248,7 +255,7 @@ local void tr_static_init()
     for (code = 0; code < LENGTH_CODES-1; code++) {
         base_length[code] = length;
         for (n = 0; n < (1<<extra_lbits[code]); n++) {
-            length_code[length++] = (uch)code;
+            _length_code[length++] = (uch)code;
         }
     }
     Assert (length == 256, "tr_static_init: length != 256");
@@ -256,14 +263,14 @@ local void tr_static_init()
      * in two different ways: code 284 + 5 bits or code 285, so we
      * overwrite length_code[255] to use the best encoding:
      */
-    length_code[length-1] = (uch)code;
+    _length_code[length-1] = (uch)code;
 
     /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
     dist = 0;
     for (code = 0 ; code < 16; code++) {
         base_dist[code] = dist;
         for (n = 0; n < (1<<extra_dbits[code]); n++) {
-            dist_code[dist++] = (uch)code;
+            _dist_code[dist++] = (uch)code;
         }
     }
     Assert (dist == 256, "tr_static_init: dist != 256");
@@ -271,7 +278,7 @@ local void tr_static_init()
     for ( ; code < D_CODES; code++) {
         base_dist[code] = dist << 7;
         for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
-            dist_code[256 + dist++] = (uch)code;
+            _dist_code[256 + dist++] = (uch)code;
         }
     }
     Assert (dist == 256, "tr_static_init: 256+dist != 512");
@@ -295,8 +302,74 @@ local void tr_static_init()
         static_dtree[n].Code = bi_reverse((unsigned)n, 5);
     }
     static_init_done = 1;
+
+#  ifdef GEN_TREES_H
+    gen_trees_header();
+#  endif
+#endif /* defined(GEN_TREES_H) || !defined(STDC) */
 }
 
+/* ===========================================================================
+ * Genererate the file trees.h describing the static trees.
+ */
+#ifdef GEN_TREES_H
+#  ifndef DEBUG
+#    include <stdio.h>
+#  endif
+
+#  define SEPARATOR(i, last, width) \
+      ((i) == (last)? "\n};\n\n" :    \
+       ((i) % (width) == (width)-1 ? ",\n" : ", "))
+
+void gen_trees_header()
+{
+    FILE *header = fopen("trees.h", "w");
+    int i;
+
+    Assert (header != NULL, "Can't open trees.h");
+    fprintf(header,
+	    "/* header created automatically with -DGEN_TREES_H */\n\n");
+
+    fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
+    for (i = 0; i < L_CODES+2; i++) {
+	fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
+		static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
+    }
+
+    fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
+    for (i = 0; i < D_CODES; i++) {
+	fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
+		static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
+    }
+
+    fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
+    for (i = 0; i < DIST_CODE_LEN; i++) {
+	fprintf(header, "%2u%s", _dist_code[i],
+		SEPARATOR(i, DIST_CODE_LEN-1, 20));
+    }
+
+    fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
+    for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
+	fprintf(header, "%2u%s", _length_code[i],
+		SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
+    }
+
+    fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
+    for (i = 0; i < LENGTH_CODES; i++) {
+	fprintf(header, "%1u%s", base_length[i],
+		SEPARATOR(i, LENGTH_CODES-1, 20));
+    }
+
+    fprintf(header, "local const int base_dist[D_CODES] = {\n");
+    for (i = 0; i < D_CODES; i++) {
+	fprintf(header, "%5u%s", base_dist[i],
+		SEPARATOR(i, D_CODES-1, 10));
+    }
+
+    fclose(header);
+}
+#endif /* GEN_TREES_H */
+
 /* ===========================================================================
  * Initialize the tree data structures for a new zlib stream.
  */
@@ -413,12 +486,12 @@ local void gen_bitlen(s, desc)
     deflate_state *s;
     tree_desc *desc;    /* the tree descriptor */
 {
-    ct_data *tree  = desc->dyn_tree;
-    int max_code   = desc->max_code;
-    ct_data *stree = desc->stat_desc->static_tree;
-    const intf *extra = desc->stat_desc->extra_bits;
-    int base       = desc->stat_desc->extra_base;
-    int max_length = desc->stat_desc->max_length;
+    ct_data *tree        = desc->dyn_tree;
+    int max_code         = desc->max_code;
+    const ct_data *stree = desc->stat_desc->static_tree;
+    const intf *extra    = desc->stat_desc->extra_bits;
+    int base             = desc->stat_desc->extra_base;
+    int max_length       = desc->stat_desc->max_length;
     int h;              /* heap index */
     int n, m;           /* iterate over the tree elements */
     int bits;           /* bit length */
@@ -542,9 +615,9 @@ local void build_tree(s, desc)
     deflate_state *s;
     tree_desc *desc; /* the tree descriptor */
 {
-    ct_data *tree   = desc->dyn_tree;
-    ct_data *stree  = desc->stat_desc->static_tree;
-    int elems       = desc->stat_desc->elems;
+    ct_data *tree         = desc->dyn_tree;
+    const ct_data *stree  = desc->stat_desc->static_tree;
+    int elems             = desc->stat_desc->elems;
     int n, m;          /* iterate over heap elements */
     int max_code = -1; /* largest code with non zero frequency */
     int node;          /* new node being created */
@@ -965,12 +1038,13 @@ int _tr_tally (s, dist, lc)
                (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
                (ush)d_code(dist) < (ush)D_CODES,  "_tr_tally: bad match");
 
-        s->dyn_ltree[length_code[lc]+LITERALS+1].Freq++;
+        s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
         s->dyn_dtree[d_code(dist)].Freq++;
     }
 
+#ifdef TRUNCATE_BLOCK
     /* Try to guess if it is profitable to stop the current block here */
-    if (s->level > 2 && (s->last_lit & 0xfff) == 0) {
+    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
         /* Compute an upper bound for the compressed length */
         ulg out_length = (ulg)s->last_lit*8L;
         ulg in_length = (ulg)((long)s->strstart - s->block_start);
@@ -985,6 +1059,7 @@ int _tr_tally (s, dist, lc)
                100L - out_length*100L/in_length));
         if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
     }
+#endif
     return (s->last_lit == s->lit_bufsize-1);
     /* We avoid equality with lit_bufsize because of wraparound at 64K
      * on 16 bit machines and because stored blocks are restricted to
@@ -1014,7 +1089,7 @@ local void compress_block(s, ltree, dtree)
             Tracecv(isgraph(lc), (stderr," '%c' ", lc));
         } else {
             /* Here, lc is the match length - MIN_MATCH */
-            code = length_code[lc];
+            code = _length_code[lc];
             send_code(s, code+LITERALS+1, ltree); /* send the length code */
             extra = extra_lbits[code];
             if (extra != 0) {

trees.h

@@ -0,0 +1,128 @@
+/* header created automatically with -DGEN_TREES_H */
+
+local const ct_data static_ltree[L_CODES+2] = {
+{{ 12},{  8}}, {{140},{  8}}, {{ 76},{  8}}, {{204},{  8}}, {{ 44},{  8}},
+{{172},{  8}}, {{108},{  8}}, {{236},{  8}}, {{ 28},{  8}}, {{156},{  8}},
+{{ 92},{  8}}, {{220},{  8}}, {{ 60},{  8}}, {{188},{  8}}, {{124},{  8}},
+{{252},{  8}}, {{  2},{  8}}, {{130},{  8}}, {{ 66},{  8}}, {{194},{  8}},
+{{ 34},{  8}}, {{162},{  8}}, {{ 98},{  8}}, {{226},{  8}}, {{ 18},{  8}},
+{{146},{  8}}, {{ 82},{  8}}, {{210},{  8}}, {{ 50},{  8}}, {{178},{  8}},
+{{114},{  8}}, {{242},{  8}}, {{ 10},{  8}}, {{138},{  8}}, {{ 74},{  8}},
+{{202},{  8}}, {{ 42},{  8}}, {{170},{  8}}, {{106},{  8}}, {{234},{  8}},
+{{ 26},{  8}}, {{154},{  8}}, {{ 90},{  8}}, {{218},{  8}}, {{ 58},{  8}},
+{{186},{  8}}, {{122},{  8}}, {{250},{  8}}, {{  6},{  8}}, {{134},{  8}},
+{{ 70},{  8}}, {{198},{  8}}, {{ 38},{  8}}, {{166},{  8}}, {{102},{  8}},
+{{230},{  8}}, {{ 22},{  8}}, {{150},{  8}}, {{ 86},{  8}}, {{214},{  8}},
+{{ 54},{  8}}, {{182},{  8}}, {{118},{  8}}, {{246},{  8}}, {{ 14},{  8}},
+{{142},{  8}}, {{ 78},{  8}}, {{206},{  8}}, {{ 46},{  8}}, {{174},{  8}},
+{{110},{  8}}, {{238},{  8}}, {{ 30},{  8}}, {{158},{  8}}, {{ 94},{  8}},
+{{222},{  8}}, {{ 62},{  8}}, {{190},{  8}}, {{126},{  8}}, {{254},{  8}},
+{{  1},{  8}}, {{129},{  8}}, {{ 65},{  8}}, {{193},{  8}}, {{ 33},{  8}},
+{{161},{  8}}, {{ 97},{  8}}, {{225},{  8}}, {{ 17},{  8}}, {{145},{  8}},
+{{ 81},{  8}}, {{209},{  8}}, {{ 49},{  8}}, {{177},{  8}}, {{113},{  8}},
+{{241},{  8}}, {{  9},{  8}}, {{137},{  8}}, {{ 73},{  8}}, {{201},{  8}},
+{{ 41},{  8}}, {{169},{  8}}, {{105},{  8}}, {{233},{  8}}, {{ 25},{  8}},
+{{153},{  8}}, {{ 89},{  8}}, {{217},{  8}}, {{ 57},{  8}}, {{185},{  8}},
+{{121},{  8}}, {{249},{  8}}, {{  5},{  8}}, {{133},{  8}}, {{ 69},{  8}},
+{{197},{  8}}, {{ 37},{  8}}, {{165},{  8}}, {{101},{  8}}, {{229},{  8}},
+{{ 21},{  8}}, {{149},{  8}}, {{ 85},{  8}}, {{213},{  8}}, {{ 53},{  8}},
+{{181},{  8}}, {{117},{  8}}, {{245},{  8}}, {{ 13},{  8}}, {{141},{  8}},
+{{ 77},{  8}}, {{205},{  8}}, {{ 45},{  8}}, {{173},{  8}}, {{109},{  8}},
+{{237},{  8}}, {{ 29},{  8}}, {{157},{  8}}, {{ 93},{  8}}, {{221},{  8}},
+{{ 61},{  8}}, {{189},{  8}}, {{125},{  8}}, {{253},{  8}}, {{ 19},{  9}},
+{{275},{  9}}, {{147},{  9}}, {{403},{  9}}, {{ 83},{  9}}, {{339},{  9}},
+{{211},{  9}}, {{467},{  9}}, {{ 51},{  9}}, {{307},{  9}}, {{179},{  9}},
+{{435},{  9}}, {{115},{  9}}, {{371},{  9}}, {{243},{  9}}, {{499},{  9}},
+{{ 11},{  9}}, {{267},{  9}}, {{139},{  9}}, {{395},{  9}}, {{ 75},{  9}},
+{{331},{  9}}, {{203},{  9}}, {{459},{  9}}, {{ 43},{  9}}, {{299},{  9}},
+{{171},{  9}}, {{427},{  9}}, {{107},{  9}}, {{363},{  9}}, {{235},{  9}},
+{{491},{  9}}, {{ 27},{  9}}, {{283},{  9}}, {{155},{  9}}, {{411},{  9}},
+{{ 91},{  9}}, {{347},{  9}}, {{219},{  9}}, {{475},{  9}}, {{ 59},{  9}},
+{{315},{  9}}, {{187},{  9}}, {{443},{  9}}, {{123},{  9}}, {{379},{  9}},
+{{251},{  9}}, {{507},{  9}}, {{  7},{  9}}, {{263},{  9}}, {{135},{  9}},
+{{391},{  9}}, {{ 71},{  9}}, {{327},{  9}}, {{199},{  9}}, {{455},{  9}},
+{{ 39},{  9}}, {{295},{  9}}, {{167},{  9}}, {{423},{  9}}, {{103},{  9}},
+{{359},{  9}}, {{231},{  9}}, {{487},{  9}}, {{ 23},{  9}}, {{279},{  9}},
+{{151},{  9}}, {{407},{  9}}, {{ 87},{  9}}, {{343},{  9}}, {{215},{  9}},
+{{471},{  9}}, {{ 55},{  9}}, {{311},{  9}}, {{183},{  9}}, {{439},{  9}},
+{{119},{  9}}, {{375},{  9}}, {{247},{  9}}, {{503},{  9}}, {{ 15},{  9}},
+{{271},{  9}}, {{143},{  9}}, {{399},{  9}}, {{ 79},{  9}}, {{335},{  9}},
+{{207},{  9}}, {{463},{  9}}, {{ 47},{  9}}, {{303},{  9}}, {{175},{  9}},
+{{431},{  9}}, {{111},{  9}}, {{367},{  9}}, {{239},{  9}}, {{495},{  9}},
+{{ 31},{  9}}, {{287},{  9}}, {{159},{  9}}, {{415},{  9}}, {{ 95},{  9}},
+{{351},{  9}}, {{223},{  9}}, {{479},{  9}}, {{ 63},{  9}}, {{319},{  9}},
+{{191},{  9}}, {{447},{  9}}, {{127},{  9}}, {{383},{  9}}, {{255},{  9}},
+{{511},{  9}}, {{  0},{  7}}, {{ 64},{  7}}, {{ 32},{  7}}, {{ 96},{  7}},
+{{ 16},{  7}}, {{ 80},{  7}}, {{ 48},{  7}}, {{112},{  7}}, {{  8},{  7}},
+{{ 72},{  7}}, {{ 40},{  7}}, {{104},{  7}}, {{ 24},{  7}}, {{ 88},{  7}},
+{{ 56},{  7}}, {{120},{  7}}, {{  4},{  7}}, {{ 68},{  7}}, {{ 36},{  7}},
+{{100},{  7}}, {{ 20},{  7}}, {{ 84},{  7}}, {{ 52},{  7}}, {{116},{  7}},
+{{  3},{  8}}, {{131},{  8}}, {{ 67},{  8}}, {{195},{  8}}, {{ 35},{  8}},
+{{163},{  8}}, {{ 99},{  8}}, {{227},{  8}}
+};
+
+local const ct_data static_dtree[D_CODES] = {
+{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},
+{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},
+{{10},{ 5}}, {{26},{ 5}}, {{ 6},{ 5}}, {{22},{ 5}}, {{14},{ 5}},
+{{30},{ 5}}, {{ 1},{ 5}}, {{17},{ 5}}, {{ 9},{ 5}}, {{25},{ 5}},
+{{ 5},{ 5}}, {{21},{ 5}}, {{13},{ 5}}, {{29},{ 5}}, {{ 3},{ 5}},
+{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
+};
+
+const uch _dist_code[DIST_CODE_LEN] = {
+ 0,  1,  2,  3,  4,  4,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  8,
+ 8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,  9, 10, 10, 10, 10, 10, 10, 10, 10,
+10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,  0,  0, 16, 17,
+18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
+};
+
+const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {
+ 0,  1,  2,  3,  4,  5,  6,  7,  8,  8,  9,  9, 10, 10, 11, 11, 12, 12, 12, 12,
+13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
+17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
+19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
+22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
+};
+
+local const int base_length[LENGTH_CODES] = {
+0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
+64, 80, 96, 112, 128, 160, 192, 224, 0
+};
+
+local const int base_dist[D_CODES] = {
+    0,     1,     2,     3,     4,     6,     8,    12,    16,    24,
+   32,    48,    64,    96,   128,   192,   256,   384,   512,   768,
+ 1024,  1536,  2048,  3072,  4096,  6144,  8192, 12288, 16384, 24576
+};
+

uncompr.c

@@ -22,7 +22,7 @@
    enough memory, Z_BUF_ERROR if there was not enough room in the output
    buffer, or Z_DATA_ERROR if the input data was corrupted.
 */
-int EXPORT uncompress (dest, destLen, source, sourceLen)
+int ZEXPORT uncompress (dest, destLen, source, sourceLen)
     Bytef *dest;
     uLongf *destLen;
     const Bytef *source;

zconf.h

@@ -30,6 +30,7 @@
 #  define inflateSyncPoint z_inflateSyncPoint
 #  define inflateReset	z_inflateReset
 #  define compress	z_compress
+#  define compress2	z_compress2
 #  define uncompress	z_uncompress
 #  define adler32	z_adler32
 #  define crc32		z_crc32
@@ -158,6 +159,29 @@
 #    define FAR __far
 #  endif
 #endif
+
+/* Compile with -DZLIB_DLL for Windows DLL support */
+#if (defined(_WINDOWS) || defined(WINDOWS)) && defined(ZLIB_DLL)
+#  ifdef FAR
+#    undef FAR
+#  endif
+#  include <windows.h>
+#  define ZEXPORT  WINAPI
+#  ifdef WIN32
+#    define ZEXPORTVA  WINAPIV
+#  else
+#    define ZEXPORTVA  FAR _cdecl _export
+#  endif
+#else
+#   if defined (__BORLANDC__) && defined (_Windows) && defined (__DLL__)
+#       define ZEXPORT _export
+#       define ZEXPORTVA _export
+#   else
+#       define ZEXPORT
+#       define ZEXPORTVA
+#   endif
+#endif
+
 #ifndef FAR
 #   define FAR
 #endif
@@ -186,7 +210,8 @@ typedef uLong FAR uLongf;
 #endif
 
 #ifdef HAVE_UNISTD_H
-#  include <unistd.h> /* for SEEK_* and off_t */
+#  include <sys/types.h> /* for off_t */
+#  include <unistd.h>    /* for SEEK_* and off_t */
 #  define z_off_t  off_t
 #endif
 #ifndef SEEK_SET
@@ -197,26 +222,6 @@ typedef uLong FAR uLongf;
 #  define  z_off_t long
 #endif
 
-/* Compile with -DZLIB_DLL for Windows DLL support */
-#if (defined(_WINDOWS) || defined(WINDOWS)) && defined(ZLIB_DLL)
-#  undef FAR
-#  include <windows.h>
-#  define EXPORT  WINAPI
-#  ifdef WIN32
-#    define EXPORTVA  WINAPIV
-#  else
-#    define EXPORTVA  FAR _cdecl _export
-#  endif
-#else
-#   if defined (__BORLANDC__) && defined (_Windows) && defined (__DLL__)
-#       define EXPORT _export
-#       define EXPORTVA _export
-#   else
-#       define EXPORT
-#       define EXPORTVA
-#   endif
-#endif
-
 /* MVS linker does not support external names larger than 8 bytes */
 #if defined(__MVS__)
 #   pragma map(deflateInit_,"DEIN")

zlib.3

@@ -1,15 +1,15 @@
-.TH ZLIB 3 "20 January 1998"
+.TH ZLIB 3 "27 February 1998"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
 [see
 .I zlib.h
-for full descripton]
+for full description]
 .SH DESCRIPTION
 The
 .I zlib
 library is a general purpose data compression library.
-The code is reentrant (thread safe).
+The code is thread safe.
 It provides in-memory compression and decompression functions,
 including integrity checks of the uncompressed data.
 This version of the library supports only one compression method (deflation)
@@ -66,7 +66,7 @@ zlib@quest.jpl.nasa.gov
 or, if this fails, to the author addresses given below.
 The zlib home page is:
 .IP
-http://www.cdrom.com/infozip/zlib/
+http://www.cdrom.com/pub/infozip/zlib/
 .LP
 The data format used by the zlib library is described by RFC
 (Request for Comments) 1950 to 1952 in the files: 
@@ -81,7 +81,7 @@ These documents are also available in other formats from:
 .IP
 ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 .SH AUTHORS
-Version 1.0.7.
+Version 1.1.1
 Copyright (C) 1995-1998 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP

zlib.h

@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.0.7, Jan 20th, 1998
+  version 1.1.1, Feb 27th, 1998
 
   Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
 
@@ -37,7 +37,7 @@ extern "C" {
 
 #include "zconf.h"
 
-#define ZLIB_VERSION "1.0.7"
+#define ZLIB_VERSION "1.1.1"
 
 /* 
      The 'zlib' compression library provides in-memory compression and
@@ -101,6 +101,9 @@ typedef z_stream FAR *z_streamp;
    opaque value.
 
    zalloc must return Z_NULL if there is not enough memory for the object.
+   If zlib is used in a multi-threaded application, zalloc and zfree must be
+   thread safe.
+
    On 16-bit systems, the functions zalloc and zfree must be able to allocate
    exactly 65536 bytes, but will not be required to allocate more than this
    if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
@@ -165,7 +168,7 @@ typedef z_stream FAR *z_streamp;
 
                         /* basic functions */
 
-extern const char * EXPORT zlibVersion OF((void));
+extern const char * ZEXPORT zlibVersion OF((void));
 /* The application can compare zlibVersion and ZLIB_VERSION for consistency.
    If the first character differs, the library code actually used is
    not compatible with the zlib.h header file used by the application.
@@ -173,7 +176,7 @@ extern const char * EXPORT zlibVersion OF((void));
  */
 
 /* 
-extern int EXPORT deflateInit OF((z_streamp strm, int level));
+extern int ZEXPORT deflateInit OF((z_streamp strm, int level));
 
      Initializes the internal stream state for compression. The fields
    zalloc, zfree and opaque must be initialized before by the caller.
@@ -195,7 +198,7 @@ extern int EXPORT deflateInit OF((z_streamp strm, int level));
 */
 
 
-extern int EXPORT deflate OF((z_streamp strm, int flush));
+extern int ZEXPORT deflate OF((z_streamp strm, int flush));
 /*
     deflate compresses as much data as possible, and stops when the input
   buffer becomes empty or the output buffer becomes full. It may introduce some
@@ -272,7 +275,7 @@ extern int EXPORT deflate OF((z_streamp strm, int flush));
 */
 
 
-extern int EXPORT deflateEnd OF((z_streamp strm));
+extern int ZEXPORT deflateEnd OF((z_streamp strm));
 /*
      All dynamically allocated data structures for this stream are freed.
    This function discards any unprocessed input and does not flush any
@@ -287,7 +290,7 @@ extern int EXPORT deflateEnd OF((z_streamp strm));
 
 
 /* 
-extern int EXPORT inflateInit OF((z_streamp strm));
+extern int ZEXPORT inflateInit OF((z_streamp strm));
 
      Initializes the internal stream state for decompression. The fields
    next_in, avail_in, zalloc, zfree and opaque must be initialized before by
@@ -307,7 +310,7 @@ extern int EXPORT inflateInit OF((z_streamp strm));
 */
 
 
-extern int EXPORT inflate OF((z_streamp strm, int flush));
+extern int ZEXPORT inflate OF((z_streamp strm, int flush));
 /*
     inflate decompresses as much data as possible, and stops when the input
   buffer becomes empty or the output buffer becomes full. It may some
@@ -376,7 +379,7 @@ extern int EXPORT inflate OF((z_streamp strm, int flush));
 */
 
 
-extern int EXPORT inflateEnd OF((z_streamp strm));
+extern int ZEXPORT inflateEnd OF((z_streamp strm));
 /*
      All dynamically allocated data structures for this stream are freed.
    This function discards any unprocessed input and does not flush any
@@ -394,12 +397,12 @@ extern int EXPORT inflateEnd OF((z_streamp strm));
 */
 
 /*   
-extern int EXPORT deflateInit2 OF((z_streamp strm,
-                                   int  level,
-                                   int  method,
-                                   int  windowBits,
-                                   int  memLevel,
-                                   int  strategy));
+extern int ZEXPORT deflateInit2 OF((z_streamp strm,
+                                    int  level,
+                                    int  method,
+                                    int  windowBits,
+                                    int  memLevel,
+                                    int  strategy));
 
      This is another version of deflateInit with more compression options. The
    fields next_in, zalloc, zfree and opaque must be initialized before by
@@ -437,9 +440,9 @@ extern int EXPORT deflateInit2 OF((z_streamp strm,
    not perform any compression: this will be done by deflate().
 */
                             
-extern int EXPORT deflateSetDictionary OF((z_streamp strm,
-                                           const Bytef *dictionary,
-				           uInt  dictLength));
+extern int ZEXPORT deflateSetDictionary OF((z_streamp strm,
+                                            const Bytef *dictionary,
+                                            uInt  dictLength));
 /*
      Initializes the compression dictionary from the given byte sequence
    without producing any compressed output. This function must be called
@@ -473,8 +476,8 @@ extern int EXPORT deflateSetDictionary OF((z_streamp strm,
    perform any compression: this will be done by deflate().
 */
 
-extern int EXPORT deflateCopy OF((z_streamp dest,
-                                  z_streamp source));
+extern int ZEXPORT deflateCopy OF((z_streamp dest,
+                                   z_streamp source));
 /*
      Sets the destination stream as a complete copy of the source stream.
 
@@ -491,7 +494,7 @@ extern int EXPORT deflateCopy OF((z_streamp dest,
    destination.
 */
 
-extern int EXPORT deflateReset OF((z_streamp strm));
+extern int ZEXPORT deflateReset OF((z_streamp strm));
 /*
      This function is equivalent to deflateEnd followed by deflateInit,
    but does not free and reallocate all the internal compression state.
@@ -502,7 +505,7 @@ extern int EXPORT deflateReset OF((z_streamp strm));
    stream state was inconsistent (such as zalloc or state being NULL).
 */
 
-extern int EXPORT deflateParams OF((z_streamp strm, int level, int strategy));
+extern int ZEXPORT deflateParams OF((z_streamp strm, int level, int strategy));
 /*
      Dynamically update the compression level and compression strategy.  The
    interpretation of level and strategy is as in deflateInit2.  This can be
@@ -522,8 +525,8 @@ extern int EXPORT deflateParams OF((z_streamp strm, int level, int strategy));
 */
 
 /*   
-extern int EXPORT inflateInit2 OF((z_streamp strm,
-                                   int  windowBits));
+extern int ZEXPORT inflateInit2 OF((z_streamp strm,
+                                    int  windowBits));
 
      This is another version of inflateInit with an extra parameter. The
    fields next_in, avail_in, zalloc, zfree and opaque must be initialized
@@ -544,9 +547,9 @@ extern int EXPORT inflateInit2 OF((z_streamp strm,
    modified, but next_out and avail_out are unchanged.)
 */
 
-extern int EXPORT inflateSetDictionary OF((z_streamp strm,
-				           const Bytef *dictionary,
-					   uInt  dictLength));
+extern int ZEXPORT inflateSetDictionary OF((z_streamp strm,
+                                            const Bytef *dictionary,
+                                            uInt  dictLength));
 /*
      Initializes the decompression dictionary from the given uncompressed byte
    sequence. This function must be called immediately after a call of inflate
@@ -563,7 +566,7 @@ extern int EXPORT inflateSetDictionary OF((z_streamp strm,
    inflate().
 */
 
-extern int EXPORT inflateSync OF((z_streamp strm));
+extern int ZEXPORT inflateSync OF((z_streamp strm));
 /* 
     Skips invalid compressed data until a full flush point (see above the
   description of deflate with Z_FULL_FLUSH) can be found, or until all
@@ -578,7 +581,7 @@ extern int EXPORT inflateSync OF((z_streamp strm));
   until success or end of the input data.
 */
 
-extern int EXPORT inflateReset OF((z_streamp strm));
+extern int ZEXPORT inflateReset OF((z_streamp strm));
 /*
      This function is equivalent to inflateEnd followed by inflateInit,
    but does not free and reallocate all the internal decompression state.
@@ -599,8 +602,8 @@ extern int EXPORT inflateReset OF((z_streamp strm));
    utility functions can easily be modified if you need special options.
 */
 
-extern int EXPORT compress OF((Bytef *dest,   uLongf *destLen,
-			       const Bytef *source, uLong sourceLen));
+extern int ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
+                                const Bytef *source, uLong sourceLen));
 /*
      Compresses the source buffer into the destination buffer.  sourceLen is
    the byte length of the source buffer. Upon entry, destLen is the total
@@ -614,8 +617,23 @@ extern int EXPORT compress OF((Bytef *dest,   uLongf *destLen,
    buffer.
 */
 
-extern int EXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
-				 const Bytef *source, uLong sourceLen));
+extern int ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
+                                 const Bytef *source, uLong sourceLen,
+                                 int level));
+/*
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in deflateInit.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least 0.1% larger than sourceLen plus
+   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+   Z_STREAM_ERROR if the level parameter is invalid.
+*/
+
+extern int ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
+                                  const Bytef *source, uLong sourceLen));
 /*
      Decompresses the source buffer into the destination buffer.  sourceLen is
    the byte length of the source buffer. Upon entry, destLen is the total
@@ -635,7 +653,7 @@ extern int EXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
 
 typedef voidp gzFile;
 
-extern gzFile EXPORT gzopen  OF((const char *path, const char *mode));
+extern gzFile ZEXPORT gzopen  OF((const char *path, const char *mode));
 /*
      Opens a gzip (.gz) file for reading or writing. The mode parameter
    is as in fopen ("rb" or "wb") but can also include a compression level
@@ -651,7 +669,7 @@ extern gzFile EXPORT gzopen  OF((const char *path, const char *mode));
    can be checked to distinguish the two cases (if errno is zero, the
    zlib error is Z_MEM_ERROR).  */
 
-extern gzFile EXPORT gzdopen  OF((int fd, const char *mode));
+extern gzFile ZEXPORT gzdopen  OF((int fd, const char *mode));
 /*
      gzdopen() associates a gzFile with the file descriptor fd.  File
    descriptors are obtained from calls like open, dup, creat, pipe or
@@ -664,7 +682,7 @@ extern gzFile EXPORT gzdopen  OF((int fd, const char *mode));
    the (de)compression state.
 */
 
-extern int EXPORT gzsetparams OF((gzFile file, int level, int strategy));
+extern int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
 /*
      Dynamically update the compression level or strategy. See the description
    of deflateInit2 for the meaning of these parameters.
@@ -672,7 +690,7 @@ extern int EXPORT gzsetparams OF((gzFile file, int level, int strategy));
    opened for writing.
 */
 
-extern int EXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
+extern int ZEXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
 /*
      Reads the given number of uncompressed bytes from the compressed file.
    If the input file was not in gzip format, gzread copies the given number
@@ -680,33 +698,49 @@ extern int EXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
      gzread returns the number of uncompressed bytes actually read (0 for
    end of file, -1 for error). */
 
-extern int EXPORT    gzwrite OF((gzFile file, const voidp buf, unsigned len));
+extern int ZEXPORT    gzwrite OF((gzFile file, const voidp buf, unsigned len));
 /*
      Writes the given number of uncompressed bytes into the compressed file.
    gzwrite returns the number of uncompressed bytes actually written
    (0 in case of error).
 */
 
-extern int EXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
+extern int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
 /*
      Converts, formats, and writes the args to the compressed file under
    control of the format string, as in fprintf. gzprintf returns the number of
    uncompressed bytes actually written (0 in case of error).
 */
 
-extern int EXPORT    gzputc OF((gzFile file, int c));
+extern int ZEXPORT gzputs OF((gzFile file, const char *s));
+/*
+      Writes the given null-terminated string to the compressed file, excluding
+   the terminating null character.
+      gzputs returns the number of characters written, or -1 in case of error.
+*/
+
+extern char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
+/*
+      Reads bytes from the compressed file until len-1 characters are read, or
+   a newline character is read and transferred to buf, or an end-of-file
+   condition is encountered.  The string is then terminated with a null
+   character.
+      gzgets returns buf, or Z_NULL in case of error.
+*/
+
+extern int ZEXPORT    gzputc OF((gzFile file, int c));
 /*
       Writes c, converted to an unsigned char, into the compressed file.
    gzputc returns the value that was written, or -1 in case of error.
 */
 
-extern int EXPORT    gzgetc OF((gzFile file));
+extern int ZEXPORT    gzgetc OF((gzFile file));
 /*
       Reads one byte from the compressed file. gzgetc returns this byte
    or -1 in case of end of file or error.
 */
 
-extern int EXPORT    gzflush OF((gzFile file, int flush));
+extern int ZEXPORT    gzflush OF((gzFile file, int flush));
 /*
      Flushes all pending output into the compressed file. The parameter
    flush is as in the deflate() function. The return value is the zlib
@@ -716,7 +750,7 @@ extern int EXPORT    gzflush OF((gzFile file, int flush));
    degrade compression.
 */
 
-extern z_off_t EXPORT    gzseek OF((gzFile file, z_off_t offset, int whence));
+extern z_off_t ZEXPORT    gzseek OF((gzFile file, z_off_t offset, int whence));
 /* 
       Sets the starting position for the next gzread or gzwrite on the given
    compressed file. The offset represents a number of bytes in the
@@ -733,14 +767,14 @@ extern z_off_t EXPORT    gzseek OF((gzFile file, z_off_t offset, int whence));
    would be before the current position.
 */
 
-extern int EXPORT    gzrewind OF((gzFile file));
+extern int ZEXPORT    gzrewind OF((gzFile file));
 /*
      Rewinds the given file. This function is supported only for reading.
 
    gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
 */
 
-extern z_off_t EXPORT    gztell OF((gzFile file));
+extern z_off_t ZEXPORT    gztell OF((gzFile file));
 /*
      Returns the starting position for the next gzread or gzwrite on the
    given compressed file. This position represents a number of bytes in the
@@ -749,20 +783,20 @@ extern z_off_t EXPORT    gztell OF((gzFile file));
    gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
 */
 
-extern int EXPORT gzeof OF((gzFile file));
+extern int ZEXPORT gzeof OF((gzFile file));
 /*
      Returns 1 when EOF has previously been detected reading the given
    input stream, otherwise zero.
 */
 
-extern int EXPORT    gzclose OF((gzFile file));
+extern int ZEXPORT    gzclose OF((gzFile file));
 /*
      Flushes all pending output if necessary, closes the compressed file
    and deallocates all the (de)compression state. The return value is the zlib
    error number (see function gzerror below).
 */
 
-extern const char * EXPORT gzerror OF((gzFile file, int *errnum));
+extern const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
 /*
      Returns the error message for the last error which occurred on the
    given compressed file. errnum is set to zlib error number. If an
@@ -779,7 +813,7 @@ extern const char * EXPORT gzerror OF((gzFile file, int *errnum));
    compression library.
 */
 
-extern uLong EXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
+extern uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
 
 /*
      Update a running Adler-32 checksum with the bytes buf[0..len-1] and
@@ -796,7 +830,7 @@ extern uLong EXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
      if (adler != original_adler) error();
 */
 
-extern uLong EXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
+extern uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
 /*
      Update a running crc with the bytes buf[0..len-1] and return the updated
    crc. If buf is NULL, this function returns the required initial value
@@ -818,22 +852,23 @@ extern uLong EXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
 /* deflateInit and inflateInit are macros to allow checking the zlib version
  * and the compiler's view of z_stream:
  */
-extern int EXPORT deflateInit_ OF((z_streamp strm, int level,
-			           const char *version, int stream_size));
-extern int EXPORT inflateInit_ OF((z_streamp strm,
-				   const char *version, int stream_size));
-extern int EXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
-				    int windowBits, int memLevel, int strategy,
-				    const char *version, int stream_size));
-extern int EXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
-				    const char *version, int stream_size));
+extern int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
+                                    const char *version, int stream_size));
+extern int ZEXPORT inflateInit_ OF((z_streamp strm,
+                                    const char *version, int stream_size));
+extern int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
+                                     int windowBits, int memLevel,
+                                     int strategy, const char *version,
+                                     int stream_size));
+extern int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
+                                     const char *version, int stream_size));
 #define deflateInit(strm, level) \
         deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
 #define inflateInit(strm) \
         inflateInit_((strm),                ZLIB_VERSION, sizeof(z_stream))
 #define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
         deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
-		      (strategy),           ZLIB_VERSION, sizeof(z_stream))
+                      (strategy),           ZLIB_VERSION, sizeof(z_stream))
 #define inflateInit2(strm, windowBits) \
         inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
 
@@ -842,9 +877,9 @@ extern int EXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
     struct internal_state {int dummy;}; /* hack for buggy compilers */
 #endif
 
-extern const char * EXPORT zError           OF((int err));
-extern int          EXPORT inflateSyncPoint OF((z_streamp z));
-extern uLongf *     EXPORT get_crc_table    OF((void));
+extern const char   * ZEXPORT zError           OF((int err));
+extern int            ZEXPORT inflateSyncPoint OF((z_streamp z));
+extern const uLongf * ZEXPORT get_crc_table    OF((void));
 
 #ifdef __cplusplus
 }

zutil.c

@@ -5,8 +5,6 @@
 
 /* @(#) $Id$ */
 
-#include <stdio.h>
-
 #include "zutil.h"
 
 struct internal_state      {int dummy;}; /* for buggy compilers */
@@ -28,7 +26,7 @@ const char *z_errmsg[10] = {
 ""};
 
 
-const char * EXPORT zlibVersion()
+const char * ZEXPORT zlibVersion()
 {
     return ZLIB_VERSION;
 }
@@ -51,7 +49,7 @@ void z_error (m)
 /* exported to allow conversion of error code to string for compress() and
  * uncompress()
  */
-const char * EXPORT zError(err)
+const char * ZEXPORT zError(err)
     int err;
 {
     return ERR_MSG(err);

zutil.h

@@ -110,8 +110,16 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #  define OS_CODE  0x05
 #endif
 
-#ifdef MACOS
+#if defined(MACOS) || defined(TARGET_OS_MAC)
 #  define OS_CODE  0x07
+#  ifndef fdopen
+#    define fdopen(fd,mode) NULL /* No fdopen() */
+#  endif
+#endif
+#if defined(__MWERKS__) && !defined(fdopen)
+#  if __dest_os != __be_os && __dest_os != __win32_os
+#    define fdopen(fd,mode) NULL
+#  endif
 #endif
 
 #ifdef __50SERIES /* Prime/PRIMOS */
@@ -200,7 +208,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #endif
 
 
-typedef uLong (EXPORT *check_func) OF((uLong check, const Bytef *buf,
+typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
 				       uInt len));
 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 void   zcfree  OF((voidpf opaque, voidpf ptr));