zlib 1.0.4

ChangeLog

@@ -1,6 +1,35 @@
 
 		ChangeLog file for zlib
 
+Changes in 1.0.4 (24 Jul 96)
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+  bit, so the decompressor could decompress all the correct data but went
+  on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
+- use z_error only for DEBUG (avoid problem with DLLs)
+
+Changes in 1.0.3 (2 Jul 96)
+- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
+  small and medium models; this makes the library incompatible with previous
+  versions for these models. (No effect in large model or on other systems.)
+- return OK instead of BUF_ERROR if previous deflate call returned with
+  avail_out as zero but there is nothing to do
+- added memcmp for non STDC compilers
+- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
+- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
+- better check for 16-bit mode MSC (avoids problem with Symantec)
+
+Changes in 1.0.2 (23 May 96)
+- added Windows DLL support
+- added a function zlibVersion (for the DLL support)
+- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
+- Bytef is define's instead of typedef'd only for Borland C
+- avoid reading uninitialized memory in example.c
+- mention in README that the zlib format is now RFC1950
+- updated Makefile.dj2
+- added algorithm.doc
+
 Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
 - fix array overlay in deflate.c which sometimes caused bad compressed data
 - fix inflate bug with empty stored block

INDEX

@@ -7,12 +7,17 @@ Makefile.bor	makefile for Borland C/C++ 16-bit
 Makefile.dj2	makefile for DJGPP 2.x
 Makefile.in	makefile for Unix (template for configure)
 Makefile.msc	makefile for Microsoft C 16-bit
+Makefile.riscos makefile for RISCOS
 Makefile.sas	makefile for Amiga SAS/C
 Makefile.tc	makefile for Turbo C
 Makefile.wat	makefile for Watcom C
 README		guess what
+algorithm.doc	description of the compression & decompression algorithms
 configure	configure script for Unix
 descrip.mms	makefile for Vax/VMS
+zlib.def        definition file for Windows DLL
+zlib.rc         definition file for Windows DLL
+
 
 		zlib public header files (must be kept):
 zconf.h

Makefile

@@ -22,7 +22,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0.1
+VER=1.0.4
 LIBS=libz.a
 
 AR=ar rc
@@ -37,7 +37,8 @@ OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
 
 TEST_OBJS = example.o minigzip.o
 
-DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] descrip.mms *.[ch]
+DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] descrip.mms \
+	    zlib.def zlib.rc algorithm.doc  *.[ch]
 
 all: example minigzip
 
@@ -85,8 +86,8 @@ clean:
 
 zip:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	v=`sed -n -e 's/\./-/g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
-	zip -ul9 zlib-$$v $(DISTFILES)
+	zip -ul9 zlib$$v $(DISTFILES)
 	mv Makefile~ Makefile
 
 dist:

Makefile.dj2

@@ -2,32 +2,50 @@
 # Copyright (C) 1995-1996 Jean-loup Gailly.
 # For conditions of distribution and use, see copyright notice in zlib.h 
 
-# To compile and test, type:
+# To compile, or to compile and test, type:
+# 
 #   make -fmakefile.dj2;  make test -fmakefile.dj2
-
+# 
 # To install libz.a, zconf.h and zlib.h in the djgpp directories, type:
+# 
 #    make install -fmakefile.dj2
-# after first defining LIBRARY_PATH and INCLUDE_PATH in djgpp.env for [make].
+# 
-# Alternately these variables may be defined below.
+# after first defining LIBRARY_PATH and INCLUDE_PATH in djgpp.env as
+# in the sample below if the pattern of the DJGPP distribution is to
+# be followed.  Remember that, while <sp>'es around <=> are ignored in
+# makefiles, they are *not* in batch files or in djgpp.env.
+# - - - - -
+# [make]
+# INCLUDE_PATH=%\>;INCLUDE_PATH%%\DJDIR%\include
+# LIBRARY_PATH=%\>;LIBRARY_PATH%%\DJDIR%\lib
+# BUTT=-m486
+# - - - - -
+# Alternately, these variables may be defined below, overriding the values
+# in djgpp.env, as
+INCLUDE_PATH=c:\usr\include
 
 CC=gcc
 
 #CFLAGS=-MMD -O
 #CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
 #CFLAGS=-MMD -g -DDEBUG
-CFLAGS=-MMD -O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
-           -Wstrict-prototypes -Wmissing-prototypes
+             -Wstrict-prototypes -Wmissing-prototypes
+
+# If cp.exe is not found, replace with copy /Y .
+CP=cp -f
+# If install.exe is not found, replace with $(CP).
 INSTALL=install
+# The default value of RM is "rm -f."  If "rm.exe" is not found, uncomment:
+# RM=del
 LDLIBS=-L. -lz
 LD=$(CC) -s -o
 LDSHARED=$(CC)
 
-VER=1.0
+INCL=zlib.h zconf.h
 LIBS=libz.a
 
 AR=ar rcs
-# The default value of RM is "rm -f."  If "rm.exe" is not found, uncomment:
-# RM=del
 
 prefix=/usr/local
 exec_prefix = $(prefix)
@@ -37,10 +55,6 @@ OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
 
 TEST_OBJS = example.o minigzip.o
 
-DISTFILES = README Change.Log configur Makefile.in Makefile Makefile.msc \
-	    Makefile.bor Makefile.tc Make_vms.com descrip.mms zlib099.pat \
-	    *.bak *.old *.[ch]
-
 all: example.exe minigzip.exe
 
 test: all
@@ -53,25 +67,25 @@ test: all
 libz.a: $(OBJS)
 	$(AR) $@ $(OBJS)
 
-libz.so.$(VER): $(OBJS)
-	$(LDSHARED) -o $@ $(OBJS)
-	rm -f libz.so; ln -s $@ libz.so
-
 %.exe : %.o $(LIBS)
 	$(LD) $@ $< $(LDLIBS)
 
-# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env
+# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env .
 
-install: $(LIBS)
+.PHONY : uninstall clean
-	$(INSTALL) zlib.h zconf.h $(INCLUDE_PATH)
+
-	$(INSTALL) $(LIBS) $(LIBRARY_PATH)
+install: $(INCL) $(LIBS)
+	-@if not exist $(INCLUDE_PATH)\nul mkdir $(INCLUDE_PATH)
+	-@if not exist $(LIBRARY_PATH)\nul mkdir $(LIBRARY_PATH)
+	for %%f in ($(INCL)) do $(INSTALL) %%f $(INCLUDE_PATH)
+	for %%p in ($(LIBS)) do $(INSTALL) %%p $(LIBRARY_PATH)
 
 uninstall:
-	$(RM) $(LIBRARY_PATH)/$(LIBS)
+	for %%f in ($(INCL)) do $(RM) $(INCLUDE_PATH)\%%f
-	$(RM) $(INCLUDE_PATH)/zlib.h $(INCLUDE_PATH)/zconf.h
+	for %%p in ($(LIBS)) do $(RM) $(LIBRARY_PATH)\%%p
 
 clean:
-	$(RM) *.d *.o *.~ *.exe libz.a libz.so* foo.gz
+	for %%p in (*.d *.o *.exe libz.a libz.so* foo.gz) do $(RM) %%p
 
 DEPS := $(wildcard *.d)
 ifneq ($(DEPS),)

Makefile.in

@@ -22,7 +22,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0.1
+VER=1.0.4
 LIBS=libz.a
 
 AR=ar rc
@@ -37,7 +37,8 @@ OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
 
 TEST_OBJS = example.o minigzip.o
 
-DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] descrip.mms *.[ch]
+DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] descrip.mms \
+	    zlib.def zlib.rc algorithm.doc  *.[ch]
 
 all: example minigzip
 
@@ -85,8 +86,8 @@ clean:
 
 zip:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	v=`sed -n -e 's/\./-/g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
-	zip -ul9 zlib-$$v $(DISTFILES)
+	zip -ul9 zlib$$v $(DISTFILES)
 	mv Makefile~ Makefile
 
 dist:

Makefile.msc

@@ -28,6 +28,8 @@ OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
 OBJP2 = zutil$(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
 
@@ -80,7 +82,7 @@ minigzip.obj: minigzip.c zlib.h zconf.h
 
 # we must cut the command line to fit in the MS/DOS 128 byte limit:
 zlib.lib: $(OBJ1) $(OBJ2)
-        del zlib.lib
+	if exist zlib.lib del zlib.lib
 	lib zlib $(OBJ1);
 	lib zlib $(OBJ2);
 

Makefile.riscos

@@ -0,0 +1,46 @@
+# Project:   zlib_1_03
+
+
+# Toolflags:
+CCflags = -c -depend !Depend -IC: -g -throwback  -DRISCOS  -fnah 
+C++flags = -c -depend !Depend -IC: -throwback
+Linkflags = -aif -c++ -o $@ 
+ObjAsmflags = -throwback -NoCache -depend !Depend
+CMHGflags = 
+LibFileflags = -c -l -o $@ 
+Squeezeflags = -o $@
+
+
+# Final targets:
+@.zlib_lib:   @.o.adler32 @.o.compress @.o.crc32 @.o.deflate @.o.gzio \
+        @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil @.o.trees \
+        @.o.uncompress @.o.zutil 
+        LibFile $(LibFileflags) @.o.adler32 @.o.compress @.o.crc32 @.o.deflate \
+        @.o.gzio @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil \
+        @.o.trees @.o.uncompress @.o.zutil 
+@.test:   @.tests.minigzip @.tests.example 
+        echo Please run "Test" in directory tests 
+@.tests.minigzip:   @.o.minigzip @.zlib_lib C:o.Stubs 
+        Link $(Linkflags) @.o.minigzip @.zlib_lib C:o.Stubs 
+@.tests.example:   @.o.example @.zlib_lib C:o.Stubs 
+        Link $(Linkflags) @.o.example @.zlib_lib C:o.Stubs 
+
+
+# User-editable dependencies:
+.c.o:
+        cc $(ccflags) -o $@ $<
+
+# Static dependencies:
+@.o.example:   @.tests.c.example
+        cc $(ccflags) -o @.o.example @.tests.c.example 
+@.o.minigzip:   @.tests.c.minigzip
+        cc $(ccflags) -o @.o.minigzip @.tests.c.minigzip 
+
+
+# Dynamic dependencies:
+o.minigzip:	tests.c.minigzip
+o.minigzip:	h.zlib
+o.minigzip:	h.zconf
+o.example:	tests.c.example
+o.example:	h.zlib
+o.example:	h.zconf

README

@@ -1,8 +1,9 @@
-zlib 1.0.1 is a general purpose data compression library.  All the code
+zlib 1.0.4 is a general purpose data compression library.  All the code
 is reentrant (thread safe).  The data format used by the zlib library
-is described in the files zlib-3.3.doc, deflate-1.3.doc and
+is described by RFCs (Request for Comments) 1950 to 1952 in the files 
-gzip-4.3.doc, available in various formats from
+ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
-ftp://swrinde.nde.swri.edu/pub/png/documents/zlib/
+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
@@ -17,19 +18,22 @@ makefiles such as Makefile.msc; for VMS, use Make_vms.com or descrip.mms.
 
 Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov> or,
 if this fails, to the addresses given below in the Copyright section.
+The zlib home page is http://quest.jpl.nasa.gov/zlib/
 
-The changes made in version 1.0.1 are documented in the file ChangeLog.
+The changes made in version 1.0.4 are documented in the file ChangeLog.
-Version number 1.0 was skipped to avoid confusion with version 0.99
+The main changes since 1.0.3 are:
-which had some references to 1.0 already. The main changes since 0.99 are:
+
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+  bit, so the decompressor could decompress all the correct data but went
+  on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
+
+
+A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
+is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
+ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
 
-- fix array overlay in deflate.c which sometimes caused bad compressed data
-- fix inflate bug with empty stored block
-- fix MSDOS medium model which was broken in 0.99
-- fix deflateParams() which could generated bad compressed data.
-- added an INDEX file
-- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
-  Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
-- several portability improvements
 
 Notes for some targets:
 
@@ -38,7 +42,7 @@ Notes for some targets:
 
 - For 64-bit Iris, deflate.c must be compiled without any optimization.
   With -O, one libpng test fails. The test works in 32 bit mode (with
-  the -32 compiler flag).
+  the -32 compiler flag). The compiler bug has been reported to SGI.
 
 - 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.
@@ -46,9 +50,13 @@ Notes for some targets:
 - 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.
 
-A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
+- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
-is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
+  and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL
-ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
+  For help on building a zlib DLL, contact Alessandro Iacopetti
+  <iaco@email.alessandria.alpcom.it>  http://lisa.unial.it/iaco ,
+  or contact Brad Clarke <bclarke@cyberus.ca>.
+
+- gzdopen is not supported on RISCOS
 
 
 Acknowledgments:

adler32.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: adler32.c,v 1.9 1996/01/30 21:59:09 me Exp $ */
+/* $Id: adler32.c,v 1.10 1996/05/22 11:52:18 me Exp $ */
 
 #include "zlib.h"
 

algorithm.doc

@@ -0,0 +1,105 @@
+1. Compression algorithm (deflate)
+
+The deflation algorithm used by zlib (also zip and gzip) is a variation of
+LZ77 (Lempel-Ziv 1977, see reference below). It finds duplicated strings in
+the input data.  The second occurrence of a string is replaced by a
+pointer to the previous string, in the form of a pair (distance,
+length).  Distances are limited to 32K bytes, and lengths are limited
+to 258 bytes. When a string does not occur anywhere in the previous
+32K bytes, it is emitted as a sequence of literal bytes.  (In this
+description, `string' must be taken as an arbitrary sequence of bytes,
+and is not restricted to printable characters.)
+
+Literals or match lengths are compressed with one Huffman tree, and
+match distances are compressed with another tree. The trees are stored
+in a compact form at the start of each block. The blocks can have any
+size (except that the compressed data for one block must fit in
+available memory). A block is terminated when deflate() determines that
+it would be useful to start another block with fresh trees. (This is
+somewhat similar to the behavior of LZW-based _compress_.)
+
+Duplicated strings are found using a hash table. All input strings of
+length 3 are inserted in the hash table. A hash index is computed for
+the next 3 bytes. If the hash chain for this index is not empty, all
+strings in the chain are compared with the current input string, and
+the longest match is selected.
+
+The hash chains are searched starting with the most recent strings, to
+favor small distances and thus take advantage of the Huffman encoding.
+The hash chains are singly linked. There are no deletions from the
+hash chains, the algorithm simply discards matches that are too old.
+
+To avoid a worst-case situation, very long hash chains are arbitrarily
+truncated at a certain length, determined by a runtime option (level
+parameter of deflateInit). So deflate() does not always find the longest
+possible match but generally finds a match which is long enough.
+
+deflate() also defers the selection of matches with a lazy evaluation
+mechanism. After a match of length N has been found, deflate() searches for a
+longer match at the next input byte. If a longer match is found, the
+previous match is truncated to a length of one (thus producing a single
+literal byte) and the longer match is emitted afterwards.  Otherwise,
+the original match is kept, and the next match search is attempted only
+N steps later.
+
+The lazy match evaluation is also subject to a runtime parameter. If
+the current match is long enough, deflate() reduces the search for a longer
+match, thus speeding up the whole process. If compression ratio is more
+important than speed, deflate() attempts a complete second search even if
+the first match is already long enough.
+
+The lazy match evaluation is not performed for the fastest compression
+modes (level parameter 1 to 3). For these fast modes, new strings
+are inserted in the hash table only when no match was found, or
+when the match is not too long. This degrades the compression ratio
+but saves time since there are both fewer insertions and fewer searches.
+
+
+2. Decompression algorithm (inflate)
+
+The real question is, given a Huffman tree, how to decode fast.  The most
+important realization is that shorter codes are much more common than
+longer codes, so pay attention to decoding the short codes fast, and let
+the long codes take longer to decode.
+
+inflate() sets up a first level table that covers some number of bits of
+input less than the length of longest code.  It gets that many bits from the
+stream, and looks it up in the table.  The table will tell if the next
+code is that many bits or less and how many, and if it is, it will tell
+the value, else it will point to the next level table for which inflate()
+grabs more bits and tries to decode a longer code.
+
+How many bits to make the first lookup is a tradeoff between the time it
+takes to decode and the time it takes to build the table.  If building the
+table took no time (and if you had infinite memory), then there would only
+be a first level table to cover all the way to the longest code.  However,
+building the table ends up taking a lot longer for more bits since short
+codes are replicated many times in such a table.  What inflate() does is
+simply to make the number of bits in the first table a variable, and set it
+for the maximum speed.
+
+inflate() sends new trees relatively often, so it is possibly set for a
+smaller first level table than an application that has only one tree for
+all the data.  For inflate, which has 286 possible codes for the
+literal/length tree, the size of the first table is nine bits.  Also the
+distance trees have 30 possible values, and the size of the first table is
+six bits.  Note that for each of those cases, the table ended up one bit
+longer than the ``average'' code length, i.e. the code length of an
+approximately flat code which would be a little more than eight bits for
+286 symbols and a little less than five bits for 30 symbols.  It would be
+interesting to see if optimizing the first level table for other
+applications gave values within a bit or two of the flat code size.
+
+
+Jean-loup Gailly        Mark Adler
+gzip@prep.ai.mit.edu    madler@alumni.caltech.edu
+
+
+References:
+
+[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
+Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
+pp. 337-343.
+
+``DEFLATE Compressed Data Format Specification'' available in
+ftp://ds.internic.net/rfc/rfc1951.txt

compress.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: compress.c,v 1.9 1996/01/30 21:59:09 me Exp $ */
+/* $Id: compress.c,v 1.10 1996/05/23 16:51:12 me Exp $ */
 
 #include "zlib.h"
 
@@ -30,9 +30,10 @@ int compress (dest, destLen, source, sourceLen)
 
     stream.next_in = (Bytef*)source;
     stream.avail_in = (uInt)sourceLen;
+#ifdef MAXSEG_64K
     /* Check for source > 64K on 16-bit machine: */
     if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-
+#endif
     stream.next_out = dest;
     stream.avail_out = (uInt)*destLen;
     if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;

deflate.c

@@ -47,11 +47,11 @@
  *
  */
 
-/* $Id: deflate.c,v 1.12 1996/01/30 21:59:11 me Exp $ */
+/* $Id: deflate.c,v 1.15 1996/07/24 13:40:58 me Exp $ */
 
 #include "deflate.h"
 
-char deflate_copyright[] = " deflate 1.0.1 Copyright 1995-1996 Jean-loup Gailly ";
+char deflate_copyright[] = " deflate 1.0.4 Copyright 1995-1996 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
@@ -62,15 +62,25 @@ char deflate_copyright[] = " deflate 1.0.1 Copyright 1995-1996 Jean-loup Gailly
 /* ===========================================================================
  *  Function prototypes.
  */
+typedef enum {
+    need_more,      /* block not completed, need more input or more output */
+    block_done,     /* block flush performed */
+    finish_started, /* finish started, need only more output at next deflate */
+    finish_done     /* finish done, accept no more input or output */
+} block_state;
+
+typedef block_state (*compress_func) OF((deflate_state *s, int flush));
+/* Compression function. Returns the block state after the call. */
+
 local void fill_window    OF((deflate_state *s));
-local int  deflate_stored OF((deflate_state *s, int flush));
+local block_state deflate_stored OF((deflate_state *s, int flush));
-local int  deflate_fast   OF((deflate_state *s, int flush));
+local block_state deflate_fast   OF((deflate_state *s, int flush));
-local int  deflate_slow   OF((deflate_state *s, int flush));
+local block_state deflate_slow   OF((deflate_state *s, int flush));
 local void lm_init        OF((deflate_state *s));
 local uInt longest_match  OF((deflate_state *s, IPos cur_match));
 local void putShortMSB    OF((deflate_state *s, uInt b));
-local void flush_pending  OF((z_stream *strm));
+local void flush_pending  OF((z_streamp strm));
-local int read_buf        OF((z_stream *strm, charf *buf, unsigned size));
+local int read_buf        OF((z_streamp strm, charf *buf, unsigned size));
 #ifdef ASMV
       void match_init OF((void)); /* asm code initialization */
 #endif
@@ -97,9 +107,6 @@ local  void check_match OF((deflate_state *s, IPos start, IPos match,
  * See deflate.c for comments about the MIN_MATCH+1.
  */
 
-typedef int (*compress_func) OF((deflate_state *s, int flush));
-/* Compressing function */
-
 /* Values for max_lazy_match, good_match and max_chain_length, depending on
  * the desired pack level (0..9). The values given below have been tuned to
  * exclude worst case performance for pathological files. Better values may be
@@ -169,7 +176,7 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
 
 /* ========================================================================= */
 int deflateInit_(strm, level, version, stream_size)
-    z_stream *strm;
+    z_streamp strm;
     int level;
     const char *version;
     int stream_size;
@@ -182,7 +189,7 @@ int deflateInit_(strm, level, version, stream_size)
 /* ========================================================================= */
 int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 		  version, stream_size)
-    z_stream *strm;
+    z_streamp strm;
     int  level;
     int  method;
     int  windowBits;
@@ -249,7 +256,7 @@ int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 
     if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
         s->pending_buf == Z_NULL) {
-        strm->msg = ERR_MSG(Z_MEM_ERROR);
+        strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
         deflateEnd (strm);
         return Z_MEM_ERROR;
     }
@@ -265,7 +272,7 @@ int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 
 /* ========================================================================= */
 int deflateSetDictionary (strm, dictionary, dictLength)
-    z_stream *strm;
+    z_streamp strm;
     const Bytef *dictionary;
     uInt  dictLength;
 {
@@ -304,7 +311,7 @@ int deflateSetDictionary (strm, dictionary, dictLength)
 
 /* ========================================================================= */
 int deflateReset (strm)
-    z_stream *strm;
+    z_streamp strm;
 {
     deflate_state *s;
     
@@ -334,7 +341,7 @@ int deflateReset (strm)
 
 /* ========================================================================= */
 int deflateParams(strm, level, strategy)
-    z_stream *strm;
+    z_streamp strm;
     int level;
     int strategy;
 {
@@ -388,7 +395,7 @@ local void putShortMSB (s, b)
  * (See also read_buf()).
  */
 local void flush_pending(strm)
-    z_stream *strm;
+    z_streamp strm;
 {
     unsigned len = strm->state->pending;
 
@@ -408,14 +415,16 @@ local void flush_pending(strm)
 
 /* ========================================================================= */
 int deflate (strm, flush)
-    z_stream *strm;
+    z_streamp strm;
     int flush;
 {
     int old_flush; /* value of flush param for previous deflate call */
     deflate_state *s;
 
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (strm == Z_NULL || strm->state == Z_NULL ||
-    
+	flush > Z_FINISH || flush < 0) {
+        return Z_STREAM_ERROR;
+    }
     s = strm->state;
 
     if (strm->next_out == Z_NULL ||
@@ -447,14 +456,23 @@ int deflate (strm, flush)
 	if (s->strstart != 0) {
 	    putShortMSB(s, (uInt)(strm->adler >> 16));
 	    putShortMSB(s, (uInt)(strm->adler & 0xffff));
-	    strm->adler = 1L;
 	}
+	strm->adler = 1L;
     }
 
     /* Flush as much pending output as possible */
     if (s->pending != 0) {
         flush_pending(strm);
-        if (strm->avail_out == 0) return Z_OK;
+        if (strm->avail_out == 0) {
+	    /* Since avail_out is 0, deflate will be called again with
+	     * more output space, but possibly with both pending and
+	     * avail_in equal to zero. There won't be anything to do,
+	     * but this is not an error situation so make sure we
+	     * return OK instead of BUF_ERROR at next call of deflate:
+             */
+	    s->last_flush = -1;
+	    return Z_OK;
+	}
 
     /* Make sure there is something to do and avoid duplicate consecutive
      * flushes. For repeated and useless calls with Z_FINISH, we keep
@@ -474,22 +492,27 @@ int deflate (strm, flush)
      */
     if (strm->avail_in != 0 || s->lookahead != 0 ||
         (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
-        int quit;
+        block_state bstate;
 
-        if (flush == Z_FINISH) {
+	bstate = (*(configuration_table[s->level].func))(s, flush);
+
+        if (bstate == finish_started || bstate == finish_done) {
             s->status = FINISH_STATE;
         }
-	quit = (*(configuration_table[s->level].func))(s, flush);
+        if (bstate == need_more || bstate == finish_started) {
-
+	    if (strm->avail_out == 0) {
-        if (quit || strm->avail_out == 0) return Z_OK;
+	        s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
-        /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+	    }
-         * of deflate should use the same flush parameter to make sure
+	    return Z_OK;
-         * that the flush is complete. So we don't have to output an
+	    /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
-         * empty block here, this will be done at next call. This also
+	     * of deflate should use the same flush parameter to make sure
-         * ensures that for a very small output buffer, we emit at most
+	     * that the flush is complete. So we don't have to output an
-         * one empty block.
+	     * empty block here, this will be done at next call. This also
-         */
+	     * ensures that for a very small output buffer, we emit at most
-        if (flush != Z_NO_FLUSH && flush != Z_FINISH) {
+	     * one empty block.
+	     */
+	}
+        if (bstate == block_done) {
             if (flush == Z_PARTIAL_FLUSH) {
                 _tr_align(s);
             } else { /* FULL_FLUSH or SYNC_FLUSH */
@@ -502,7 +525,10 @@ int deflate (strm, flush)
                 }
             }
             flush_pending(strm);
-            if (strm->avail_out == 0) return Z_OK;
+	    if (strm->avail_out == 0) {
+	      s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+	      return Z_OK;
+	    }
         }
     }
     Assert(strm->avail_out > 0, "bug2");
@@ -523,7 +549,7 @@ int deflate (strm, flush)
 
 /* ========================================================================= */
 int deflateEnd (strm)
-    z_stream *strm;
+    z_streamp strm;
 {
     int status;
 
@@ -544,8 +570,8 @@ int deflateEnd (strm)
 
 /* ========================================================================= */
 int deflateCopy (dest, source)
-    z_stream *dest;
+    z_streamp dest;
-    z_stream *source;
+    z_streamp source;
 {
     if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
         return Z_STREAM_ERROR;
@@ -570,7 +596,7 @@ int deflateCopy (dest, source)
  * (See also flush_pending()).
  */
 local int read_buf(strm, buf, size)
-    z_stream *strm;
+    z_streamp strm;
     charf *buf;
     unsigned size;
 {
@@ -916,18 +942,18 @@ local void fill_window(s)
 /* Same but force premature exit if necessary. */
 #define FLUSH_BLOCK(s, eof) { \
    FLUSH_BLOCK_ONLY(s, eof); \
-   if (s->strm->avail_out == 0) return 1; \
+   if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
 }
 
 /* ===========================================================================
  * Copy without compression as much as possible from the input stream, return
- * true if processing was terminated prematurely (no more input or output
+ * the current block state.
- * space).  This function does not insert new strings in the dictionary
+ * This function does not insert new strings in the dictionary since
- * since uncompressible data is probably not useful. This function is used
+ * uncompressible data is probably not useful. This function is used
  * only for the level=0 compression option.
  * NOTE: this function should be optimized to avoid extra copying.
  */
-local int deflate_stored(s, flush)
+local block_state deflate_stored(s, flush)
     deflate_state *s;
     int flush;
 {
@@ -939,7 +965,7 @@ local int deflate_stored(s, flush)
 		   s->block_start >= (long)s->w_size, "slide too late");
 
             fill_window(s);
-            if (s->lookahead == 0 && flush == Z_NO_FLUSH) return 1;
+            if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
 
             if (s->lookahead == 0) break; /* flush the current block */
         }
@@ -961,17 +987,17 @@ local int deflate_stored(s, flush)
 	}
     }
     FLUSH_BLOCK(s, flush == Z_FINISH);
-    return 0; /* normal exit */
+    return flush == Z_FINISH ? finish_done : block_done;
 }
 
 /* ===========================================================================
- * Compress as much as possible from the input stream, return true if
+ * Compress as much as possible from the input stream, return the current
- * processing was terminated prematurely (no more input or output space).
+ * block state.
  * This function does not perform lazy evaluation of matches and inserts
  * new strings in the dictionary only for unmatched strings or for short
  * matches. It is used only for the fast compression options.
  */
-local int deflate_fast(s, flush)
+local block_state deflate_fast(s, flush)
     deflate_state *s;
     int flush;
 {
@@ -986,8 +1012,9 @@ local int deflate_fast(s, flush)
          */
         if (s->lookahead < MIN_LOOKAHEAD) {
             fill_window(s);
-            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) return 1;
+            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
-
+	        return need_more;
+	    }
             if (s->lookahead == 0) break; /* flush the current block */
         }
 
@@ -1055,7 +1082,7 @@ local int deflate_fast(s, flush)
         if (bflush) FLUSH_BLOCK(s, 0);
     }
     FLUSH_BLOCK(s, flush == Z_FINISH);
-    return 0; /* normal exit */
+    return flush == Z_FINISH ? finish_done : block_done;
 }
 
 /* ===========================================================================
@@ -1063,7 +1090,7 @@ local int deflate_fast(s, flush)
  * evaluation for matches: a match is finally adopted only if there is
  * no better match at the next window position.
  */
-local int deflate_slow(s, flush)
+local block_state deflate_slow(s, flush)
     deflate_state *s;
     int flush;
 {
@@ -1079,8 +1106,9 @@ local int deflate_slow(s, flush)
          */
         if (s->lookahead < MIN_LOOKAHEAD) {
             fill_window(s);
-            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) return 1;
+            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
-
+	        return need_more;
+	    }
             if (s->lookahead == 0) break; /* flush the current block */
         }
 
@@ -1158,7 +1186,7 @@ local int deflate_slow(s, flush)
             }
             s->strstart++;
             s->lookahead--;
-            if (s->strm->avail_out == 0) return 1;
+            if (s->strm->avail_out == 0) return need_more;
         } else {
             /* There is no previous match to compare with, wait for
              * the next step to decide.
@@ -1175,6 +1203,5 @@ local int deflate_slow(s, flush)
         s->match_available = 0;
     }
     FLUSH_BLOCK(s, flush == Z_FINISH);
-    return 0;
+    return flush == Z_FINISH ? finish_done : block_done;
 }
-

deflate.h

@@ -8,7 +8,7 @@
    subject to change. Applications should only use zlib.h.
  */
 
-/* $Id: deflate.h,v 1.9 1996/01/30 21:59:13 me Exp $ */
+/* $Id: deflate.h,v 1.10 1996/07/02 12:41:00 me Exp $ */
 
 #ifndef _DEFLATE_H
 #define _DEFLATE_H
@@ -80,7 +80,7 @@ typedef unsigned IPos;
  */
 
 typedef struct internal_state {
-    z_stream *strm;      /* pointer back to this zlib stream */
+    z_streamp strm;      /* pointer back to this zlib stream */
     int   status;        /* as the name implies */
     Bytef *pending_buf;  /* output still pending */
     Bytef *pending_out;  /* next pending byte to output to the stream */

example.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: example.c,v 1.13 1996/01/30 21:59:13 me Exp $ */
+/* $Id: example.c,v 1.16 1996/05/23 17:11:28 me Exp $ */
 
 #include <stdio.h>
 #include "zlib.h"
@@ -462,16 +462,19 @@ int main(argc, argv)
     uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
     uLong uncomprLen = comprLen;
 
-    if (zlib_version[0] != ZLIB_VERSION[0]) {
+    if (zlibVersion()[0] != ZLIB_VERSION[0]) {
         fprintf(stderr, "incompatible zlib version\n");
         exit(1);
 
-    } else if (strcmp(zlib_version, ZLIB_VERSION) != 0) {
+    } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
         fprintf(stderr, "warning: different zlib version\n");
     }
 
-    compr    = (Byte*)malloc((uInt)comprLen);
+    compr    = (Byte*)calloc((uInt)comprLen, 1);
-    uncompr  = (Byte*)calloc((uInt)uncomprLen, 1); /* must be cleared */
+    uncompr  = (Byte*)calloc((uInt)uncomprLen, 1);
+    /* compr and uncompr are cleared to avoid reading uninitialized
+     * data and to ensure that uncompr compresses well.
+     */
     if (compr == Z_NULL || uncompr == Z_NULL) {
         printf("out of memory\n");
 	exit(1);

gzio.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
-/* $Id: gzio.c,v 1.12 1996/01/30 21:59:14 me Exp $ */
+/* $Id: gzio.c,v 1.14 1996/07/24 13:41:01 me Exp $ */
 
 #include <stdio.h>
 
@@ -496,7 +496,7 @@ int gzclose (file)
    errnum is set to Z_ERRNO and the application may consult errno
    to get the exact error code.
 */
-char*  gzerror (file, errnum)
+const char*  gzerror (file, errnum)
     gzFile file;
     int *errnum;
 {
@@ -505,19 +505,19 @@ char*  gzerror (file, errnum)
 
     if (s == NULL) {
         *errnum = Z_STREAM_ERROR;
-        return ERR_MSG(Z_STREAM_ERROR);
+        return (const char*)ERR_MSG(Z_STREAM_ERROR);
     }
     *errnum = s->z_err;
-    if (*errnum == Z_OK) return (char*)"";
+    if (*errnum == Z_OK) return (const char*)"";
 
     m =  (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
 
-    if (m == NULL || *m == '\0') m = ERR_MSG(s->z_err);
+    if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
 
     TRYFREE(s->msg);
     s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
     strcpy(s->msg, s->path);
     strcat(s->msg, ": ");
     strcat(s->msg, m);
-    return s->msg;
+    return (const char*)s->msg;
 }

infblock.c

@@ -63,7 +63,7 @@ local uInt border[] = { /* Order of the bit length code lengths */
 
 void inflate_blocks_reset(s, z, c)
 inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
 uLongf *c;
 {
   if (s->checkfn != Z_NULL)
@@ -87,7 +87,7 @@ uLongf *c;
 
 
 inflate_blocks_statef *inflate_blocks_new(z, c, w)
-z_stream *z;
+z_streamp z;
 check_func c;
 uInt w;
 {
@@ -115,7 +115,7 @@ uInt w;
 #endif
 int inflate_blocks(s, z, r)
 inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
 int r;
 {
   uInt t;               /* temporary storage */
@@ -381,7 +381,7 @@ int r;
 
 int inflate_blocks_free(s, z, c)
 inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
 uLongf *c;
 {
   inflate_blocks_reset(s, z, c);

infblock.h

@@ -12,23 +12,23 @@ struct inflate_blocks_state;
 typedef struct inflate_blocks_state FAR inflate_blocks_statef;
 
 extern inflate_blocks_statef * inflate_blocks_new OF((
-    z_stream *z,
+    z_streamp z,
     check_func c,               /* check function */
     uInt w));                   /* window size */
 
 extern int inflate_blocks OF((
     inflate_blocks_statef *,
-    z_stream *,
+    z_streamp ,
     int));                      /* initial return code */
 
 extern void inflate_blocks_reset OF((
     inflate_blocks_statef *,
-    z_stream *,
+    z_streamp ,
     uLongf *));                  /* check value on output */
 
 extern int inflate_blocks_free OF((
     inflate_blocks_statef *,
-    z_stream *,
+    z_streamp ,
     uLongf *));                  /* check value on output */
 
 extern void inflate_set_dictionary OF((

infcodes.c

@@ -60,7 +60,7 @@ inflate_codes_statef *inflate_codes_new(bl, bd, tl, td, z)
 uInt bl, bd;
 inflate_huft *tl;
 inflate_huft *td; /* need separate declaration for Borland C++ */
-z_stream *z;
+z_streamp z;
 {
   inflate_codes_statef *c;
 
@@ -80,7 +80,7 @@ z_stream *z;
 
 int inflate_codes(s, z, r)
 inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
 int r;
 {
   uInt j;               /* temporary storage */
@@ -240,7 +240,7 @@ int r;
 
 void inflate_codes_free(c, z)
 inflate_codes_statef *c;
-z_stream *z;
+z_streamp z;
 {
   ZFREE(z, c);
   Tracev((stderr, "inflate:       codes free\n"));

infcodes.h

@@ -14,14 +14,14 @@ typedef struct inflate_codes_state FAR inflate_codes_statef;
 extern inflate_codes_statef *inflate_codes_new OF((
     uInt, uInt,
     inflate_huft *, inflate_huft *,
-    z_stream *));
+    z_streamp ));
 
 extern int inflate_codes OF((
     inflate_blocks_statef *,
-    z_stream *,
+    z_streamp ,
     int));
 
 extern void inflate_codes_free OF((
     inflate_codes_statef *,
-    z_stream *));
+    z_streamp ));
 

inffast.c

@@ -32,7 +32,7 @@ uInt bl, bd;
 inflate_huft *tl;
 inflate_huft *td; /* need separate declaration for Borland C++ */
 inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
 {
   inflate_huft *t;      /* temporary pointer */
   uInt e;               /* extra bits or operation */

inffast.h

@@ -14,4 +14,4 @@ extern int inflate_fast OF((
     inflate_huft *,
     inflate_huft *,
     inflate_blocks_statef *,
-    z_stream *));
+    z_streamp ));

inflate.c

@@ -49,7 +49,7 @@ struct internal_state {
 
 
 int inflateReset(z)
-z_stream *z;
+z_streamp z;
 {
   uLong c;
 
@@ -65,7 +65,7 @@ z_stream *z;
 
 
 int inflateEnd(z)
-z_stream *z;
+z_streamp z;
 {
   uLong c;
 
@@ -81,7 +81,7 @@ z_stream *z;
 
 
 int inflateInit2_(z, w, version, stream_size)
-z_stream *z;
+z_streamp z;
 int w;
 const char *version;
 int stream_size;
@@ -138,7 +138,7 @@ int stream_size;
 
 
 int inflateInit_(z, version, stream_size)
-z_stream *z;
+z_streamp z;
 const char *version;
 int stream_size;
 {
@@ -150,7 +150,7 @@ int stream_size;
 #define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
 
 int inflate(z, f)
-z_stream *z;
+z_streamp z;
 int f;
 {
   int r;
@@ -272,7 +272,7 @@ int f;
 
 
 int inflateSetDictionary(z, dictionary, dictLength)
-z_stream *z;
+z_streamp z;
 const Bytef *dictionary;
 uInt  dictLength;
 {
@@ -280,6 +280,7 @@ uInt  dictLength;
 
   if (z == Z_NULL || z->state == Z_NULL || z->state->mode != DICT0)
     return Z_STREAM_ERROR;
+
   if (adler32(1L, dictionary, dictLength) != z->adler) return Z_DATA_ERROR;
   z->adler = 1L;
 
@@ -295,7 +296,7 @@ uInt  dictLength;
 
 
 int inflateSync(z)
-z_stream *z;
+z_streamp z;
 {
   uInt n;       /* number of bytes to look at */
   Bytef *p;     /* pointer to bytes */

inftrees.c

@@ -6,7 +6,7 @@
 #include "zutil.h"
 #include "inftrees.h"
 
-char inflate_copyright[] = " inflate 1.0.1 Copyright 1995-1996 Mark Adler ";
+char inflate_copyright[] = " inflate 1.0.4 Copyright 1995-1996 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
@@ -30,7 +30,7 @@ local int huft_build OF((
     uIntf *,            /* list of extra bits for non-simple codes */
     inflate_huft * FAR*,/* result: starting table */
     uIntf *,            /* maximum lookup bits (returns actual) */
-    z_stream *));       /* for zalloc function */
+    z_streamp ));       /* for zalloc function */
 
 local voidpf falloc OF((
     voidpf,             /* opaque pointer (not used) */
@@ -103,7 +103,7 @@ uIntf *d;               /* list of base values for non-simple codes */
 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_stream *zs;           /* for zalloc function */
+z_streamp zs;           /* for zalloc function */
 /* 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
@@ -302,7 +302,7 @@ int inflate_trees_bits(c, bb, tb, z)
 uIntf *c;               /* 19 code lengths */
 uIntf *bb;              /* bits tree desired/actual depth */
 inflate_huft * FAR *tb; /* bits tree result */
-z_stream *z;            /* for zfree function */
+z_streamp z;            /* for zfree function */
 {
   int r;
 
@@ -327,7 +327,7 @@ 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_stream *z;            /* for zfree function */
+z_streamp z;            /* for zfree function */
 {
   int r;
 
@@ -442,7 +442,7 @@ inflate_huft * FAR *td;  /* distance tree result */
 
 int inflate_trees_free(t, z)
 inflate_huft *t;        /* table to free */
-z_stream *z;            /* for zfree function */
+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. */

inftrees.h

@@ -35,7 +35,7 @@ extern int inflate_trees_bits OF((
     uIntf *,                    /* 19 code lengths */
     uIntf *,                    /* bits tree desired/actual depth */
     inflate_huft * FAR *,       /* bits tree result */
-    z_stream *));               /* for zalloc, zfree functions */
+    z_streamp ));               /* for zalloc, zfree functions */
 
 extern int inflate_trees_dynamic OF((
     uInt,                       /* number of literal/length codes */
@@ -45,7 +45,7 @@ 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_stream *));               /* for zalloc, zfree functions */
+    z_streamp ));               /* for zalloc, zfree functions */
 
 extern int inflate_trees_fixed OF((
     uIntf *,                    /* literal desired/actual bit depth */
@@ -55,5 +55,5 @@ extern int inflate_trees_fixed OF((
 
 extern int inflate_trees_free OF((
     inflate_huft *,             /* tables to free */
-    z_stream *));               /* for zfree function */
+    z_streamp ));               /* for zfree function */
 

infutil.c

@@ -22,11 +22,12 @@ uInt inflate_mask[17] = {
 /* copy as much as possible from the sliding window to the output area */
 int inflate_flush(s, z, r)
 inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
 int r;
 {
   uInt n;
-  Bytef *p, *q;
+  Bytef *p;
+  Bytef *q;
 
   /* local copies of source and destination pointers */
   p = z->next_out;

infutil.h

@@ -91,7 +91,7 @@ extern uInt inflate_mask[17];
 /* copy as much as possible from the sliding window to the output area */
 extern int inflate_flush OF((
     inflate_blocks_statef *,
-    z_stream *,
+    z_streamp ,
     int));
 
 struct internal_state      {int dummy;}; /* for buggy compilers */

minigzip.c

@@ -13,7 +13,7 @@
  * or in pipe mode.
  */
 
-/* $Id: minigzip.c,v 1.8 1996/01/30 21:59:23 me Exp $ */
+/* $Id: minigzip.c,v 1.10 1996/07/24 13:41:04 me Exp $ */
 
 #include <stdio.h>
 #include "zlib.h"
@@ -37,7 +37,14 @@
 #ifdef VMS
 #  define unlink delete
 #  define GZ_SUFFIX "-gz"
-#else
+#endif
+#ifdef RISCOS
+#  define unlink remove
+#  define GZ_SUFFIX "-gz"
+#  define fileno(file) file->__file
+#endif
+
+#ifndef GZ_SUFFIX
 #  define GZ_SUFFIX ".gz"
 #endif
 #define SUFFIX_LEN sizeof(GZ_SUFFIX)

trees.c

@@ -29,7 +29,7 @@
  *          Addison-Wesley, 1983. ISBN 0-201-06672-6.
  */
 
-/* $Id: trees.c,v 1.5 1995/05/03 17:27:12 jloup Exp $ */
+/* $Id: trees.c,v 1.11 1996/07/24 13:41:06 me Exp $ */
 
 #include "deflate.h"
 
@@ -154,7 +154,7 @@ local void copy_block     OF((deflate_state *s, charf *buf, unsigned len,
 
 #else /* DEBUG */
 #  define send_code(s, c, tree) \
-     { if (verbose>1) fprintf(stderr,"\ncd %3d ",(c)); \
+     { if (verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
        send_bits(s, tree[c].Code, tree[c].Len); }
 #endif
 

zconf.h

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: zconf.h,v 1.12 1995/05/03 17:27:12 jloup Exp $ */
+/* $Id: zconf.h,v 1.20 1996/07/02 15:09:28 me Exp $ */
 
 #ifndef _ZCONF_H
 #define _ZCONF_H
@@ -37,7 +37,7 @@
 #  define Byte		z_Byte
 #  define uInt		z_uInt
 #  define uLong		z_uLong
-/* #  define Bytef	z_Bytef */
+#  define Bytef	        z_Bytef
 #  define charf		z_charf
 #  define intf		z_intf
 #  define uIntf		z_uIntf
@@ -49,8 +49,10 @@
 #if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
 #  define WIN32
 #endif
-#if (defined(__GNUC__) || defined(WIN32)) && !defined(__32BIT__)
+#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
-#  define __32BIT__
+#  ifndef __32BIT__
+#    define __32BIT__
+#  endif
 #endif
 #if defined(__MSDOS__) && !defined(MSDOS)
 #  define MSDOS
@@ -80,9 +82,9 @@
 #  endif
 #endif
 
-#ifdef	__MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
+/* Some Mac compilers merge all .h files incorrectly: */
-#  include <unix.h>
+#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__)
-#  define NO_DUMMY_DECL /* buggy compiler merges all .h files incorrectly */
+#  define NO_DUMMY_DECL
 #endif
 
 /* Maximum value for memLevel in deflateInit2 */
@@ -128,7 +130,8 @@
  * to define NO_MEMCPY in zutil.h.  If you don't need the mixed model,
  * just define FAR to be empty.
  */
-#if defined(M_I86SM) || defined(M_I86MM) /* MSC small or medium model */
+#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__)
+   /* MSC small or medium model */
 #  define SMALL_MEDIUM
 #  ifdef _MSC_VER
 #    define FAR __far
@@ -137,25 +140,25 @@
 #  endif
 #endif
 #if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
+#  ifndef __32BIT__
 #    define SMALL_MEDIUM
 #    define FAR __far
+#  endif
 #endif
 #ifndef FAR
 #   define FAR
 #endif
-/* The Watcom compiler defines M_I86SM and __SMALL__ even in 32 bit mode */
-#if defined(__WATCOMC__) && defined(__386__)
-#  undef FAR
-#  define FAR
-#  undef SMALL_MEDIUM
-#endif
 
 typedef unsigned char  Byte;  /* 8 bits */
 typedef unsigned int   uInt;  /* 16 bits or more */
 typedef unsigned long  uLong; /* 32 bits or more */
 
-/* "typedef Byte  FAR Bytef;" doesn't work with Borland C/C++ */
+#if defined(__BORLANDC__) && defined(SMALL_MEDIUM)
-#define Bytef Byte  FAR 
+   /* Borland C/C++ ignores FAR inside typedef */
+#  define Bytef Byte FAR
+#else
+   typedef Byte  FAR Bytef;
+#endif
 typedef char  FAR charf;
 typedef int   FAR intf;
 typedef uInt  FAR uIntf;
@@ -169,4 +172,13 @@ typedef uLong FAR uLongf;
    typedef Byte     *voidp;
 #endif
 
+
+/* Compile with -DZLIB_DLL for Windows DLL support */
+#if (defined(_WINDOWS) || defined(WINDOWS)) && defined(ZLIB_DLL)
+#  include <windows.h>
+#  define EXPORT  WINAPI
+#else
+#  define EXPORT
+#endif
+
 #endif /* _ZCONF_H */

zlib.def

@@ -0,0 +1,46 @@
+LIBRARY		"zlib"
+
+DESCRIPTION	'"""zlib data compression library"""'
+
+EXETYPE		NT
+
+SUBSYSTEM	WINDOWS
+
+STUB		'WINSTUB.EXE'
+
+VERSION		1.04
+
+CODE		 EXECUTE READ
+
+DATA		 READ WRITE
+
+HEAPSIZE	1048576,4096
+
+EXPORTS
+		zlibVersion
+		deflate
+		deflateEnd
+		inflate
+		inflateEnd
+		deflateSetDictionary
+		deflateCopy
+		deflateReset
+		deflateParams
+		inflateSetDictionary
+		inflateSync
+		inflateReset
+		compress
+		uncompress
+		gzopen
+		gzdopen
+		gzread
+		gzwrite
+		gzflush
+		gzclose
+		gzerror
+		adler32
+		crc32
+		deflateInit_
+		inflateInit_
+		deflateInit2_
+		inflateInit2_

zlib.h

@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.0.1, May 20th, 1996.
+  version 1.0.4, Jul 24th, 1996.
 
   Copyright (C) 1995-1996 Jean-loup Gailly and Mark Adler
 
@@ -21,7 +21,12 @@
 
   Jean-loup Gailly        Mark Adler
   gzip@prep.ai.mit.edu    madler@alumni.caltech.edu
- */
+
+
+  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).
+*/
 
 #ifndef _ZLIB_H
 #define _ZLIB_H
@@ -32,7 +37,7 @@ extern "C" {
 
 #include "zconf.h"
 
-#define ZLIB_VERSION "1.0.1"
+#define ZLIB_VERSION "1.0.4"
 
 /* 
      The 'zlib' compression library provides in-memory compression and
@@ -84,6 +89,8 @@ typedef struct z_stream_s {
     uLong   reserved;   /* reserved for future use */
 } z_stream;
 
+typedef z_stream FAR *z_streamp;
+
 /*
    The application must update next_in and avail_in when avail_in has
    dropped to zero. It must update next_out and avail_out when avail_out
@@ -156,16 +163,20 @@ typedef struct z_stream_s {
 
 #define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
 
-extern const char *zlib_version;
+#define zlib_version zlibVersion()
-/* The application can compare zlib_version and ZLIB_VERSION for consistency.
+/* for compatibility with versions < 1.0.2 */
-   If the first character differs, the library code actually used is
-   not compatible with the zlib.h header file used by the application.
- */
 
                         /* basic functions */
 
+extern const char * EXPORT 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.
+   This check is automatically made by deflateInit and inflateInit.
+ */
+
 /* 
-extern int deflateInit OF((z_stream *strm, int level));
+extern int EXPORT 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.
@@ -187,7 +198,7 @@ extern int deflateInit OF((z_stream *strm, int level));
 */
 
 
-extern int deflate OF((z_stream *strm, int flush));
+extern int EXPORT deflate OF((z_streamp strm, int flush));
 /*
   Performs one or both of the following actions:
 
@@ -230,8 +241,8 @@ extern int deflate OF((z_stream *strm, int flush));
   parameter and more output space (updated avail_out), until the flush is
   complete (deflate returns with non-zero avail_out).
 
-    If the parameter flush is set to Z_FINISH, all pending input is processed,
+    If the parameter flush is set to Z_FINISH, pending input is processed,
-  all pending output is flushed and deflate returns with Z_STREAM_END if there
+  pending output is flushed and deflate returns with Z_STREAM_END if there
   was enough output space; if deflate returns with Z_OK, this function must be
   called again with Z_FINISH and more output space (updated avail_out) but no
   more input data, until it returns with Z_STREAM_END or an error. After
@@ -256,7 +267,7 @@ extern int deflate OF((z_stream *strm, int flush));
 */
 
 
-extern int deflateEnd OF((z_stream *strm));
+extern int EXPORT 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
@@ -271,7 +282,7 @@ extern int deflateEnd OF((z_stream *strm));
 
 
 /* 
-extern int inflateInit OF((z_stream *strm));
+extern int EXPORT inflateInit OF((z_streamp strm));
 
      Initializes the internal stream state for decompression. The fields
    zalloc, zfree and opaque must be initialized before by the caller.  If
@@ -286,7 +297,7 @@ extern int inflateInit OF((z_stream *strm));
 */
 
 
-extern int inflate OF((z_stream *strm, int flush));
+extern int EXPORT inflate OF((z_streamp strm, int flush));
 /*
   Performs one or both of the following actions:
 
@@ -341,7 +352,7 @@ extern int inflate OF((z_stream *strm, int flush));
 */
 
 
-extern int inflateEnd OF((z_stream *strm));
+extern int EXPORT 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
@@ -359,12 +370,12 @@ extern int inflateEnd OF((z_stream *strm));
 */
 
 /*   
-extern int deflateInit2 OF((z_stream *strm,
+extern int EXPORT deflateInit2 OF((z_streamp strm,
-                            int  level,
+                                   int  level,
-                            int  method,
+                                   int  method,
-                            int  windowBits,
+                                   int  windowBits,
-                            int  memLevel,
+                                   int  memLevel,
-                            int  strategy));
+                                   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
@@ -417,9 +428,9 @@ extern int deflateInit2 OF((z_stream *strm,
    deflate(). 
 */
                             
-extern int deflateSetDictionary OF((z_stream *strm,
+extern int EXPORT deflateSetDictionary OF((z_streamp strm,
-				    const Bytef *dictionary,
+                                           const Bytef *dictionary,
-				    uInt  dictLength));
+				           uInt  dictLength));
 /*
      Initializes the compression dictionary (history buffer) from the given
    byte sequence without producing any compressed output. This function must
@@ -446,8 +457,8 @@ extern int deflateSetDictionary OF((z_stream *strm,
    be done by deflate(). 
 */
 
-extern int deflateCopy OF((z_stream *dest,
+extern int EXPORT deflateCopy OF((z_streamp dest,
-                           z_stream *source));
+                                  z_streamp source));
 /*
      Sets the destination stream as a complete copy of the source stream.  If
    the source stream is using an application-supplied history buffer, a new
@@ -469,7 +480,7 @@ extern int deflateCopy OF((z_stream *dest,
    destination.
 */
 
-extern int deflateReset OF((z_stream *strm));
+extern int EXPORT 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.
@@ -480,7 +491,7 @@ extern int deflateReset OF((z_stream *strm));
    stream state was inconsistent (such as zalloc or state being NULL).
 */
 
-extern int deflateParams OF((z_stream *strm, int level, int strategy));
+extern int EXPORT deflateParams OF((z_streamp strm, int level, int strategy));
 /*
      Dynamically update the compression level and compression strategy.
    This can be used to switch between compression and straight copy of
@@ -499,8 +510,8 @@ extern int deflateParams OF((z_stream *strm, int level, int strategy));
 */
 
 /*   
-extern int inflateInit2 OF((z_stream *strm,
+extern int EXPORT inflateInit2 OF((z_streamp strm,
-                            int  windowBits));
+                                   int  windowBits));
 
      This is another version of inflateInit with more compression options. The
    fields next_out, zalloc, zfree and opaque must be initialized before by
@@ -533,9 +544,9 @@ extern int inflateInit2 OF((z_stream *strm,
    inflate().
 */
 
-extern int inflateSetDictionary OF((z_stream *strm,
+extern int EXPORT inflateSetDictionary OF((z_streamp strm,
-				    const Bytef *dictionary,
+				           const Bytef *dictionary,
-				    uInt  dictLength));
+					   uInt  dictLength));
 /*
      Initializes the decompression dictionary (history buffer) from the given
    uncompressed byte sequence. This function must be called immediately after
@@ -552,7 +563,7 @@ extern int inflateSetDictionary OF((z_stream *strm,
    inflate().
 */
 
-extern int inflateSync OF((z_stream *strm));
+extern int EXPORT inflateSync OF((z_streamp strm));
 /* 
     Skips invalid compressed data until the special marker (see deflate()
   above) can be found, or until all available input is skipped. No output
@@ -567,7 +578,7 @@ extern int inflateSync OF((z_stream *strm));
   until success or end of the input data.
 */
 
-extern int inflateReset OF((z_stream *strm));
+extern int EXPORT 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.
@@ -588,8 +599,8 @@ extern int inflateReset OF((z_stream *strm));
    utility functions can easily be modified if you need special options.
 */
 
-extern int compress OF((Bytef *dest,   uLongf *destLen,
+extern int EXPORT compress OF((Bytef *dest,   uLongf *destLen,
-                        const Bytef *source, uLong sourceLen));
+			       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
@@ -603,8 +614,8 @@ extern int compress OF((Bytef *dest,   uLongf *destLen,
    buffer.
 */
 
-extern int uncompress OF((Bytef *dest,   uLongf *destLen,
+extern int EXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
-                          const Bytef *source, uLong sourceLen));
+				 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
@@ -624,7 +635,7 @@ extern int uncompress OF((Bytef *dest,   uLongf *destLen,
 
 typedef voidp gzFile;
 
-extern gzFile gzopen  OF((const char *path, const char *mode));
+extern gzFile EXPORT 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
@@ -636,7 +647,7 @@ extern gzFile gzopen  OF((const char *path, const char *mode));
    zlib error is Z_MEM_ERROR).
 */
 
-extern gzFile gzdopen  OF((int fd, const char *mode));
+extern gzFile EXPORT 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
@@ -649,7 +660,7 @@ extern gzFile gzdopen  OF((int fd, const char *mode));
    the (de)compression state.
 */
 
-extern int    gzread  OF((gzFile file, voidp buf, unsigned len));
+extern int EXPORT    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
@@ -657,14 +668,14 @@ extern int    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    gzwrite OF((gzFile file, const voidp buf, unsigned len));
+extern int EXPORT    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    gzflush OF((gzFile file, int flush));
+extern int EXPORT    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
@@ -674,14 +685,14 @@ extern int    gzflush OF((gzFile file, int flush));
    degrade compression.
 */
 
-extern int    gzclose OF((gzFile file));
+extern int EXPORT    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 char*   gzerror OF((gzFile file, int *errnum));
+extern const char * EXPORT 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
@@ -698,7 +709,7 @@ extern char*   gzerror OF((gzFile file, int *errnum));
    compression library.
 */
 
-extern uLong adler32 OF((uLong adler, const Bytef *buf, uInt len));
+extern uLong EXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
 
 /*
      Update a running Adler-32 checksum with the bytes buf[0..len-1] and
@@ -715,7 +726,7 @@ extern uLong adler32 OF((uLong adler, const Bytef *buf, uInt len));
      if (adler != original_adler) error();
 */
 
-extern uLong crc32   OF((uLong crc, const Bytef *buf, uInt len));
+extern uLong EXPORT 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
@@ -737,15 +748,15 @@ extern uLong 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 deflateInit_ OF((z_stream *strm, int level,
+extern int EXPORT deflateInit_ OF((z_streamp strm, int level,
-			    const char *version, int stream_size));
+			           const char *version, int stream_size));
-extern int inflateInit_ OF((z_stream *strm,
+extern int EXPORT inflateInit_ OF((z_streamp strm,
-			    const char *version, int stream_size));
+				   const char *version, int stream_size));
-extern int deflateInit2_ OF((z_stream *strm, int  level, int  method,
+extern int EXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
-                             int  windowBits, int  memLevel, int  strategy,
+				    int windowBits, int memLevel, int strategy,
-			     const char *version, int stream_size));
+				    const char *version, int stream_size));
-extern int inflateInit2_ OF((z_stream *strm, int  windowBits,
+extern int EXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
-			     const char *version, int stream_size));
+				    const char *version, int stream_size));
 #define deflateInit(strm, level) \
         deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
 #define inflateInit(strm) \

zlib.rc

@@ -0,0 +1,32 @@
+#include <windows.h>
+
+#define IDR_VERSION1  1
+IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
+  FILEVERSION	 1,0,4,0
+  PRODUCTVERSION 1,0,4,0
+  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
+  FILEFLAGS	0
+  FILEOS	VOS_DOS_WINDOWS32
+  FILETYPE	VFT_DLL
+  FILESUBTYPE	0	// not used
+BEGIN
+  BLOCK "StringFileInfo"
+  BEGIN
+    BLOCK "040904E4"
+    //language ID = U.S. English, char set = Windows, Multilingual
+
+    BEGIN
+      VALUE "FileDescription", "zlib data compression library\0"
+      VALUE "FileVersion",	"1.0.4\0"
+      VALUE "InternalName",	"zlib\0"
+      VALUE "OriginalFilename",	"zlib.lib\0"
+      VALUE "ProductName",	"ZLib.DLL\0"
+      VALUE "Comments",	"DLL support by Alessandro Iacopetti\0"
+      VALUE "LegalCopyright", "(C) 1995-1996 Jean-loup Gailly & Mark Adler\0"
+    END
+  END
+  BLOCK "VarFileInfo"
+  BEGIN
+    VALUE "Translation", 0x0409, 1252
+  END
+END

zutil.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: zutil.c,v 1.12 1996/01/30 21:59:29 me Exp $ */
+/* $Id: zutil.c,v 1.17 1996/07/24 13:41:12 me Exp $ */
 
 #include <stdio.h>
 
@@ -15,8 +15,6 @@ struct internal_state      {int dummy;}; /* for buggy compilers */
 extern void exit OF((int));
 #endif
 
-const char *zlib_version = ZLIB_VERSION;
-
 const char *z_errmsg[10] = {
 "need dictionary",     /* Z_NEED_DICT       2  */
 "stream end",          /* Z_STREAM_END      1  */
@@ -30,12 +28,19 @@ const char *z_errmsg[10] = {
 ""};
 
 
+const char *zlibVersion()
+{
+    return ZLIB_VERSION;
+}
+
+#ifdef DEBUG
 void z_error (m)
     char *m;
 {
     fprintf(stderr, "%s\n", m);
     exit(1);
 }
+#endif
 
 #ifndef HAVE_MEMCPY
 
@@ -50,6 +55,19 @@ void zmemcpy(dest, source, len)
     } while (--len != 0);
 }
 
+int zmemcmp(s1, s2, len)
+    Bytef* s1;
+    Bytef* s2;
+    uInt  len;
+{
+    uInt j;
+
+    for (j = 0; j < len; j++) {
+        if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
+    }
+    return 0;
+}
+
 void zmemzero(dest, len)
     Bytef* dest;
     uInt  len;
@@ -135,14 +153,14 @@ void  zcfree (voidpf opaque, voidpf ptr)
         return;
     }
     ptr = opaque; /* just to make some compilers happy */
-    z_error("zcfree: ptr not found");
+    Assert(0, "zcfree: ptr not found");
 }
 #endif
 #endif /* __TURBOC__ */
 
 
-#if defined(M_I86) && !(defined(__WATCOMC__) && defined(__386__))
+#if defined(M_I86) && !defined(__32BIT__)
-/* Microsoft C */
+/* Microsoft C in 16-bit mode */
 
 #  define MY_ZCALLOC
 

zutil.h

@@ -8,14 +8,14 @@
    subject to change. Applications should only use zlib.h.
  */
 
-/* $Id: zutil.h,v 1.13 1996/01/30 21:59:29 me Exp $ */
+/* $Id: zutil.h,v 1.16 1996/07/24 13:41:13 me Exp $ */
 
 #ifndef _Z_UTIL_H
 #define _Z_UTIL_H
 
 #include "zlib.h"
 
-#if defined(MSDOS) || defined(VMS) || defined(CRAY) || defined(WIN32)
+#if defined(MSDOS)||defined(VMS)||defined(CRAY)||defined(WIN32)||defined(RISCOS)
 #   include <stddef.h>
 #   include <errno.h>
 #else
@@ -40,10 +40,10 @@ typedef unsigned long  ulg;
 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 /* (size given to avoid silly warnings with Visual C++) */
 
-#define ERR_MSG(err) (char*)z_errmsg[Z_NEED_DICT-(err)]
+#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
 
 #define ERR_RETURN(strm,err) \
-  return (strm->msg = ERR_MSG(err), (err))
+  return (strm->msg = (char*)ERR_MSG(err), (err))
 /* To be used only when the state is known to be valid */
 
         /* common constants */
@@ -116,7 +116,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #  define OS_CODE  0x0a
 #endif
 
-#ifdef _BEOS_
+#if defined(_BEOS_) || defined(RISCOS)
 #  define fdopen(fd,mode) NULL /* No fdopen() */
 #endif
 
@@ -163,6 +163,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #  endif
 #else
    extern void zmemcpy  OF((Bytef* dest, Bytef* source, uInt len));
+   extern int  zmemcmp  OF((Bytef* s1,   Bytef* s2, uInt len));
    extern void zmemzero OF((Bytef* dest, uInt len));
 #endif
 
@@ -172,6 +173,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #  ifndef verbose
 #    define verbose 0
 #  endif
+   extern void z_error    OF((char *m));
 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 #  define Trace(x) fprintf x
 #  define Tracev(x) {if (verbose) fprintf x ;}
@@ -190,8 +192,6 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 
 typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len));
 
-extern void z_error    OF((char *m));
-
 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 void   zcfree  OF((voidpf opaque, voidpf ptr));