zlib 1.0.2

ChangeLog

@@ -1,7 +1,38 @@
 
 		ChangeLog file for zlib
 
-Changes in 1.0 (15 Jan 96)
+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
+- fix MSDOS medium model which was broken in 0.99
+- fix deflateParams() which could generated bad compressed data.
+- Bytef is define'd instead of typedef'ed (work around Borland bug)
+- added an INDEX file
+- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
+  Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
+- speed up adler32 for modern machines without auto-increment
+- added -ansi for IRIX in configure
+- static_init_done in trees.c is an int
+- define unlink as delete for VMS
+- fix configure for QNX
+- add configure branch for SCO and HPUX
+- avoid many warnings (unused variables, dead assignments, etc...)
+- no fdopen for BeOS
+- fix the Watcom fix for 32 bit mode (define FAR as empty)
+- removed redefinition of Byte for MKWERKS
+- work around an MWKERKS bug (incorrect merge of all .h files)
+
+Changes in 0.99 (27 Jan 96)
 - allow preset dictionary shared between compressor and decompressor
 - allow compression level 0 (no compression)
 - add deflateParams in zlib.h: allow dynamic change of compression level

INDEX

@@ -0,0 +1,50 @@
+ChangeLog	history of changes
+INDEX		this file
+Make_vms.com	script for Vax/VMS
+Makefile	makefile for Unix (generated by configure)
+Makefile.b32	makefile for Borland C++   32-bit
+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.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
+zlib.h
+
+		private source files used to build the zlib library:
+adler32.c
+compress.c
+crc32.c
+deflate.c
+deflate.h
+gzio.c
+infblock.c
+infblock.h
+infcodes.c
+infcodes.h
+inffast.c
+inffast.h
+inflate.c
+inftrees.c
+inftrees.h
+infutil.c
+infutil.h
+trees.c
+uncompr.c
+zutil.c
+zutil.h
+
+		source files for sample programs:
+example.c
+minigzip.c

Makefile

@@ -22,7 +22,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0
+VER=1.0.2
 LIBS=libz.a
 
 AR=ar rc
@@ -37,8 +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 ChangeLog configure Makefile.in Makefile Makefile.msc \
+DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] descrip.mms \
-	    Makefile.bor Makefile.tc Make_vms.com descrip.mms *.[ch]
+	    zlib.def zlib.rc algorithm.doc  *.[ch]
 
 all: example minigzip
 
@@ -86,8 +86,8 @@ clean:
 
 zip:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	v=`sed -n -e 's/\./-/' -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.b32

@@ -0,0 +1,104 @@
+# Makefile for zlib
+# Borland C++   
+
+# This version of the zlib makefile was adapted by Chris Young for use
+# with Borland C 4.5x with the Dos Power Pack for a 32-bit protected mode
+# flat memory model.  It was created for use with POV-Ray ray tracer and
+# you may choose to edit the CFLAGS to suit your needs but the
+# switches -WX and -DMSDOS are required.
+# -- Chris Young 76702.1655@compuserve.com
+
+# To use, do "make -fmakefile.b32"
+
+# See zconf.h for details about the memory requirements.
+
+# ------------- Borland C++ -------------
+MODEL=-WX 
+CFLAGS= $(MODEL) -P-C -K -N- -k- -d -3 -r- -v- -f -DMSDOS
+CC=bcc32
+LD=bcc32
+LIB=tlib
+LDFLAGS= $(MODEL)
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+  trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+  trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+  infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+  infutil$(O)+inffast$(O)
+
+all: test
+
+adler32.obj: adler32.c 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
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+zlib.lib: $(OBJ1) $(OBJ2)
+	del zlib.lib
+	$(LIB) zlib +$(OBJP1)
+	$(LIB) zlib +$(OBJP2)
+
+example.exe: example.obj zlib.lib
+	$(LD) $(LDFLAGS) example.obj zlib.lib
+
+minigzip.exe: minigzip.obj zlib.lib
+	$(LD) $(LDFLAGS) minigzip.obj zlib.lib
+
+test: example.exe minigzip.exe
+	example
+	echo hello world | minigzip | minigzip -d 
+
+#clean:
+#	del *.obj
+#	del *.exe

Makefile.dj2

@@ -0,0 +1,98 @@
+# Makefile for zlib.  Modified for djgpp v2.0 by F. J. Donahoe, 3/15/96.
+# Copyright (C) 1995-1996 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h 
+
+# 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 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 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+             -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=1.0.2
+INCL=zlib.h zconf.h
+LIBS=libz.a
+
+AR=ar rcs
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+       zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example.exe minigzip.exe
+
+test: all
+	./example
+	echo hello world | .\minigzip | .\minigzip -d 
+
+%.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+libz.a: $(OBJS)
+	$(AR) $@ $(OBJS)
+
+libz.so.$(VER): $(OBJS)
+	$(LDSHARED) -o $@ $(OBJS)
+	$(RM) libz.so; ln -s $@ libz.so
+
+%.exe : %.o $(LIBS)
+	$(LD) $@ $< $(LDLIBS)
+
+# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env .
+
+.PHONY : uninstall clean
+
+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 $(LIBRARY_PATH)
+
+uninstall:
+	for %%f in ($(INCL)) do $(RM) $(INCLUDE_PATH)\%%f
+	for %%p in ($(LIBS)) do $(RM) $(LIBRARY_PATH)\%%p
+
+clean:
+	for %%p in (*.d *.o *.exe libz.a libz.so*) do $(RM) %%p
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif

Makefile.in

@@ -22,7 +22,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0
+VER=1.0.2
 LIBS=libz.a
 
 AR=ar rc
@@ -37,8 +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 ChangeLog configure Makefile.in Makefile Makefile.msc \
+DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] descrip.mms \
-	    Makefile.bor Makefile.tc Make_vms.com descrip.mms *.[ch]
+	    zlib.def zlib.rc algorithm.doc  *.[ch]
 
 all: example minigzip
 
@@ -86,8 +86,8 @@ clean:
 
 zip:
 	mv Makefile Makefile~; cp -p Makefile.in Makefile
-	v=`sed -n -e 's/\./-/' -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.sas

@@ -0,0 +1,64 @@
+# SMakefile for zlib
+# Modified from the standard UNIX Makefile Copyright Jean-loup Gailly
+# Osma Ahvenlampi <Osma.Ahvenlampi@hut.fi>
+# Amiga, SAS/C 6.56 & Smake
+
+CC=sc
+CFLAGS=OPT
+#CFLAGS=OPT CPU=68030
+#CFLAGS=DEBUG=LINE
+LDFLAGS=LIB z.lib
+
+SCOPTIONS=OPTSCHED OPTINLINE OPTALIAS OPTTIME OPTINLOCAL STRMERGE \
+       NOICONS PARMS=BOTH NOSTACKCHECK UTILLIB NOVERSION ERRORREXX 
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+       zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: SCOPTIONS example minigzip
+
+test: all
+	`cd`/example
+	echo hello world | minigzip | minigzip -d 
+
+install: z.lib
+	copy zlib.h zconf.h INCLUDE: clone
+	copy z.lib LIB: clone
+
+z.lib: $(OBJS)
+	oml z.lib r $(OBJS)
+
+example: example.o z.lib
+	$(CC) $(CFLAGS) LINK TO $@ example.o $(LDFLAGS)
+
+minigzip: minigzip.o z.lib
+	$(CC) $(CFLAGS) LINK TO $@ minigzip.o $(LDFLAGS)
+
+clean:
+	-delete force quiet *.o example minigzip z.lib foo.gz *.lnk SCOPTIONS
+
+SCOPTIONS: Smakefile
+        copy to $@ <from <
+$(SCOPTIONS)
+<
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zutil.h zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: zutil.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h infblock.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h

Makefile.wat

@@ -0,0 +1,103 @@
+# Makefile for zlib
+# Watcom 10a
+
+# This version of the zlib makefile was adapted by Chris Young for use
+# with Watcom 10a 32-bit protected mode flat memory model.  It was created 
+# for use with POV-Ray ray tracer and you may choose to edit the CFLAGS to 
+# suit your needs but the -DMSDOS is required.
+# -- Chris Young 76702.1655@compuserve.com
+
+# To use, do "wmake -f makefile.wat"
+
+# See zconf.h for details about the memory requirements.
+
+# ------------- Watcom 10a -------------
+MODEL=-mf 
+CFLAGS= $(MODEL) -fpi87 -fp5 -zp4 -5r -w5 -oneatx -DMSDOS
+CC=wcc386
+LD=wcl386
+LIB=wlib -b -c 
+LDFLAGS= 
+O=.obj
+
+# variables
+OBJ1=adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) 
+OBJ2=trees$(O) zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) 
+OBJ3=infutil$(O) inffast$(O)
+OBJP1=adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)
+OBJP2=trees$(O)+zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)
+OBJP3=infutil$(O)+inffast$(O)
+
+all: test
+
+adler32.obj: adler32.c zutil.h zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zutil.h zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h &
+  infcodes.h infutil.h
+	$(CC) $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h &
+  infcodes.h inffast.h
+	$(CC) $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+	$(CC) $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+	$(CC) $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+	$(CC) $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+	$(CC) $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+	$(CC) $(CFLAGS) $*.c
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+zlib.lib: $(OBJ1) $(OBJ2) $(OBJ3) 
+	del zlib.lib
+	$(LIB) zlib.lib +$(OBJP1)
+	$(LIB) zlib.lib +$(OBJP2)
+	$(LIB) zlib.lib +$(OBJP3)
+
+example.exe: example.obj zlib.lib
+	$(LD) $(LDFLAGS) example.obj zlib.lib
+
+minigzip.exe: minigzip.obj zlib.lib
+	$(LD) $(LDFLAGS) minigzip.obj zlib.lib
+
+test: minigzip.exe example.exe
+	example
+	echo hello world | minigzip | minigzip -d >test
+	type test
+
+#clean:
+#	del *.obj
+#	del *.exe

README

@@ -1,7 +1,9 @@
-zlib 1.0 is a general purpose data compression library.  All the code
+zlib 1.0.2 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 ftp://ftp.uu.net/pub/archiving/zip/doc/
+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
@@ -17,29 +19,25 @@ 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 changes made in version 1.0 are documented in the file ChangeLog.
+The changes made in version 1.0.2 are documented in the file ChangeLog.
-The main changes since 0.95 are:
+The main changes since 0.99 are:
-- allow preset dictionary shared between compressor and decompressor
+
-- allow compression level 0 (no compression)
+- fix array overlay in deflate.c which sometimes caused bad compressed data
-- add deflateParams in zlib.h: allow dynamic change of compression level
+- fix inflate bug with empty stored block
-  and compression strategy.
+- fix MSDOS medium model which was broken in 0.99
-- test large buffers and deflateParams in example.c
+- fix deflateParams() which could generated bad compressed data.
-- add optional "configure" to build zlib as a shared library
+- added an INDEX file
-- suppress Makefile.qnx, use configure instead
+- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
-- fixes for 64-bit systems (needed for Alpha and Cray)
+  Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
-- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
+- several portability improvements
-- always return Z_BUF_ERROR when deflate() has nothing to do
+- added algorithm.doc
-- deflateInit and inflateInit are now macros to allow version checking
+- added Windows DLL support
-- prefix all global functions and types with z_ with -DZ_PREFIX
+- added a function zlibVersion (for the DLL support)
-- fix some very unlikely race conditions in multi-threaded environment
+
-- several minor fixes for better portability
+A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
-- free in reverse order of allocation to help memory manager
+is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
-- use zlib-1.0/* instead of zlib/* inside the tar.gz
+ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
-- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
+
-  -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
-- allow gzread on concatenated .gz files
-- deflateEnd now returns Z_DATA_ERROR if it was premature
-- deflate is finally (?) fully deterministic
 
 Notes for some targets:
 
@@ -47,8 +45,8 @@ Notes for some targets:
   avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
 
 - 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
+  With -O, one libpng test fails. The test works in 32 bit mode (with
-  -32 compiler flag).
+  the -32 compiler flag).
 
 - 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.
@@ -56,9 +54,11 @@ 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@cicladi.unial.it>
+
 
 Acknowledgments:
 

adler32.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: adler32.c,v 1.6 1995/05/03 17:27:08 jloup Exp $ */
+/* $Id: adler32.c,v 1.10 1996/05/22 11:52:18 me Exp $ */
 
 #include "zlib.h"
 
@@ -11,11 +11,11 @@
 #define NMAX 5552
 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
 
-#define DO1(buf)  {s1 += *buf++; s2 += s1;}
+#define DO1(buf,i)  {s1 += buf[i]; s2 += s1;}
-#define DO2(buf)  DO1(buf); DO1(buf);
+#define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);
-#define DO4(buf)  DO2(buf); DO2(buf);
+#define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);
-#define DO8(buf)  DO4(buf); DO4(buf);
+#define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
-#define DO16(buf) DO8(buf); DO8(buf);
+#define DO16(buf)   DO8(buf,0); DO8(buf,8);
 
 /* ========================================================================= */
 uLong adler32(adler, buf, len)
@@ -34,10 +34,12 @@ uLong adler32(adler, buf, len)
         len -= k;
         while (k >= 16) {
             DO16(buf);
+	    buf += 16;
             k -= 16;
         }
         if (k != 0) do {
-            DO1(buf);
+            s1 += *buf++;
+	    s2 += s1;
         } while (--k);
         s1 %= BASE;
         s2 %= BASE;

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 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 1.6 1995/05/03 17:27:08 jloup 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;

configure

@@ -13,6 +13,7 @@
 LIBS=libz.a
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
 AR=${AR-"ar rc"}
+RANLIB=${RANLIB-"ranlib"}
 prefix=${prefix-/usr/local}
 exec_prefix=${exec_prefix-$prefix}
 
@@ -36,25 +37,32 @@ else
   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
 	     CFLAGS=${CFLAGS-"-O2"}
 	     LDSHARED=${LDSHARED-"ld"};;
-  IRIX*)     SFLAGS=${CFLAGS-"-O2 -rpath ."}
+  IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
-	     CFLAGS=${CFLAGS-"-O2"}
+	     CFLAGS=${CFLAGS-"-ansi -O2"}
 	     LDSHARED=${LDSHARED-"cc -shared"};;
-  QNX*)      SFLAGS=${CFLAGS-"-4 -O -Q"}
+  QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
-             CFLAGS=${CFLAGS-"-4 -O -Q"}
+             CFLAGS=${CFLAGS-"-4 -O"}
 	     LDSHARED=${LDSHARED-"cc"}
-             LIBS=zlib.lib
+             RANLIB=${RANLIB-"true"}
              AR="cc -A";;
+  SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
+	     CFLAGS=${CFLAGS-"-O3"}
+	     LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;
+  HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
+	     CFLAGS=${CFLAGS-"-O"}
+	     LDSHARED=${LDSHARED-"ld -b"}
+	     SHAREDLIBS='libz.sl';;
   # send working options for other systems to gzip@prep.ai.mit.edu
   *)         SFLAGS=${CFLAGS-"-O"}
 	     CFLAGS=${CFLAGS-"-O"}
-	     LDSHARED=${LDSHARED-"-shared"};;
+	     LDSHARED=${LDSHARED-"cc -shared"};;
   esac
 fi
 
 echo Checking for shared library support...
 # we must test in two steps (cc then ld), required at least on SunOS 4.x
-if test "`$CC -c $SFLAGS $test.c 2>&1`" = "" &&
+if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
-   test "`$LDSHARED -o $test.so $test.o 2>&1`" = ""; then
+   test "`($LDSHARED -o $test.so $test.o) 2>&1`" = ""; then
   CFLAGS="$SFLAGS"
   LIBS='libz.so.$(VER)'
   echo Building shared library libz.so.$VER with $CC.
@@ -65,17 +73,14 @@ fi
 rm -f $test.[co] $test.so
 
 # udpate Makefile
-# ed -s Makefile <<EOF
 sed < Makefile.in "
 /^CC *=/s/=.*/=$CC/
 /^CFLAGS *=/s/=.*/=$CFLAGS/
 /^LDSHARED *=/s/=.*/=$LDSHARED/
 /^LIBS *=/s,=.*,=$LIBS,
 /^AR *=/s/=.*/=$AR/
+/^RANLIB *=/s,=.*,=$RANLIB,
 /^VER *=/s/=.*/=$VER/
 /^prefix *=/s,=.*,=$prefix,
 /^exec_prefix *=/s,=.*,=$exec_prefix,
 " > Makefile
-#w
-#q
-#EOF

crc32.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: crc32.c,v 1.4 1995/04/14 14:55:12 jloup Exp $ */
+/* $Id: crc32.c,v 1.8 1996/01/30 21:59:10 me Exp $ */
 
 #include "zlib.h"
 

deflate.c

@@ -47,11 +47,11 @@
  *
  */
 
-/* $Id: deflate.c,v 1.8 1995/05/03 17:27:08 jloup Exp $ */
+/* $Id: deflate.c,v 1.13 1996/05/22 11:52:21 me Exp $ */
 
 #include "deflate.h"
 
-char deflate_copyright[] = " deflate 1.0 Copyright 1995-1996 Jean-loup Gailly ";
+char deflate_copyright[] = " deflate 1.0.2 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
@@ -67,7 +67,7 @@ local int  deflate_stored OF((deflate_state *s, int flush));
 local int  deflate_fast   OF((deflate_state *s, int flush));
 local int  deflate_slow   OF((deflate_state *s, int flush));
 local void lm_init        OF((deflate_state *s));
-local int longest_match   OF((deflate_state *s, IPos cur_match));
+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 int read_buf        OF((z_stream *strm, charf *buf, unsigned size));
@@ -157,7 +157,7 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
 #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] = (str))
+    s->head[s->ins_h] = (Pos)(str))
 
 /* ===========================================================================
  * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
@@ -194,6 +194,11 @@ int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
     deflate_state *s;
     int noheader = 0;
 
+    ushf *overlay;
+    /* We overlay pending_buf and d_buf+l_buf. This works since the average
+     * output size for (length,distance) codes is <= 24 bits.
+     */
+
     if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
         stream_size != sizeof(z_stream)) {
 	return Z_VERSION_ERROR;
@@ -239,7 +244,8 @@ int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 
     s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
 
-    s->pending_buf = (uchf *) ZALLOC(strm, s->lit_bufsize, 2*sizeof(ush));
+    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+    s->pending_buf = (uchf *) overlay;
 
     if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
         s->pending_buf == Z_NULL) {
@@ -247,12 +253,8 @@ int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
         deflateEnd (strm);
         return Z_MEM_ERROR;
     }
-    s->l_buf = (uchf *) &(s->pending_buf[s->lit_bufsize]);
+    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
-    s->d_buf = (ushf *) &(s->pending_buf[2*s->lit_bufsize]);
+    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
-    /* We overlay pending_buf and d_buf+l_buf. This works since the average
-     * output size for (length,distance) codes is <= 32 bits (worst case
-     * is 15+15+13=33). d_buf is put last in case sizeof(short)>2.
-     */
 
     s->level = level;
     s->strategy = strategy;
@@ -270,7 +272,7 @@ int deflateSetDictionary (strm, dictionary, dictLength)
     deflate_state *s;
     uInt length = dictLength;
     uInt n;
-    IPos hash_head;
+    IPos hash_head = 0;
 
     if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
         strm->state->status != INIT_STATE) return Z_STREAM_ERROR;
@@ -296,6 +298,7 @@ int deflateSetDictionary (strm, dictionary, dictLength)
     for (n = 0; n <= length - MIN_MATCH; n++) {
 	INSERT_STRING(s, n, hash_head);
     }
+    if (hash_head) hash_head = 0;  /* to make compiler happy */
     return Z_OK;
 }
 
@@ -337,6 +340,7 @@ int deflateParams(strm, level, strategy)
 {
     deflate_state *s;
     compress_func func;
+    int err = Z_OK;
 
     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
     s = strm->state;
@@ -349,11 +353,9 @@ int deflateParams(strm, level, strategy)
     }
     func = configuration_table[s->level].func;
 
-    if (func != configuration_table[level].func
+    if (func != configuration_table[level].func && strm->total_in != 0) {
-	&& strm->state->lookahead != 0) {
-
 	/* Flush the last buffer: */
-	(void)(*func)(strm->state, Z_PARTIAL_FLUSH);
+	err = deflate(strm, Z_PARTIAL_FLUSH);
     }
     if (s->level != level) {
 	s->level = level;
@@ -363,7 +365,7 @@ int deflateParams(strm, level, strategy)
 	s->max_chain_length = configuration_table[level].max_chain;
     }
     s->strategy = strategy;
-    return Z_OK;
+    return err;
 }
 
 /* =========================================================================
@@ -630,7 +632,7 @@ 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.
  */
-local int longest_match(s, cur_match)
+local uInt longest_match(s, cur_match)
     deflate_state *s;
     IPos cur_match;                             /* current match */
 {
@@ -673,7 +675,7 @@ local int longest_match(s, cur_match)
     /* Do not look for matches beyond the end of the input. This is necessary
      * to make deflate deterministic.
      */
-    if (nice_match > s->lookahead) nice_match = s->lookahead;
+    if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
 
     Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
 
@@ -764,7 +766,7 @@ local int longest_match(s, cur_match)
     } while ((cur_match = prev[cur_match & wmask]) > limit
              && --chain_length != 0);
 
-    if (best_len <= s->lookahead) return best_len;
+    if ((uInt)best_len <= s->lookahead) return best_len;
     return s->lookahead;
 }
 #endif /* ASMV */
@@ -947,7 +949,7 @@ local int deflate_stored(s, flush)
 	s->lookahead = 0;
 
         /* Stored blocks are limited to 0xffff bytes: */
-        if (s->strstart == 0 || s->strstart > 0xffff) {
+        if (s->strstart == 0 || s->strstart > 0xfffe) {
 	    /* strstart == 0 is possible when wraparound on 16-bit machine */
 	    s->lookahead = s->strstart - 0xffff;
 	    s->strstart = 0xffff;

deflate.h

@@ -8,7 +8,7 @@
    subject to change. Applications should only use zlib.h.
  */
 
-/* $Id: deflate.h,v 1.5 1995/05/03 17:27:09 jloup Exp $ */
+/* $Id: deflate.h,v 1.9 1996/01/30 21:59:13 me Exp $ */
 
 #ifndef _DEFLATE_H
 #define _DEFLATE_H

example.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: example.c,v 1.9 1995/05/03 17:27:09 jloup Exp $ */
+/* $Id: example.c,v 1.16 1996/05/23 17:11:28 me Exp $ */
 
 #include <stdio.h>
 #include "zlib.h"
@@ -30,30 +30,30 @@ const char hello[] = "hello, hello!";
 const char dictionary[] = "hello";
 uLong dictId; /* Adler32 value of the dictionary */
 
-void test_compress      OF((Bytef *compr, uLong comprLen,
+void test_compress      OF((Byte *compr, uLong comprLen,
-		            Bytef *uncompr, uLong uncomprLen));
+		            Byte *uncompr, uLong uncomprLen));
 void test_gzio          OF((const char *out, const char *in, 
-		            Bytef *uncompr, int uncomprLen));
+		            Byte *uncompr, int uncomprLen));
-void test_deflate       OF((Bytef *compr, uLong comprLen));
+void test_deflate       OF((Byte *compr, uLong comprLen));
-void test_inflate       OF((Bytef *compr, uLong comprLen,
+void test_inflate       OF((Byte *compr, uLong comprLen,
-		            Bytef *uncompr, uLong uncomprLen));
+		            Byte *uncompr, uLong uncomprLen));
-void test_large_deflate OF((Bytef *compr, uLong comprLen,
+void test_large_deflate OF((Byte *compr, uLong comprLen,
-		            Bytef *uncompr, uLong uncomprLen));
+		            Byte *uncompr, uLong uncomprLen));
-void test_large_inflate OF((Bytef *compr, uLong comprLen,
+void test_large_inflate OF((Byte *compr, uLong comprLen,
-		            Bytef *uncompr, uLong uncomprLen));
+		            Byte *uncompr, uLong uncomprLen));
-void test_flush         OF((Bytef *compr, uLong comprLen));
+void test_flush         OF((Byte *compr, uLong comprLen));
-void test_sync          OF((Bytef *compr, uLong comprLen,
+void test_sync          OF((Byte *compr, uLong comprLen,
-		            Bytef *uncompr, uLong uncomprLen));
+		            Byte *uncompr, uLong uncomprLen));
-void test_dict_deflate  OF((Bytef *compr, uLong comprLen));
+void test_dict_deflate  OF((Byte *compr, uLong comprLen));
-void test_dict_inflate  OF((Bytef *compr, uLong comprLen,
+void test_dict_inflate  OF((Byte *compr, uLong comprLen,
-		            Bytef *uncompr, uLong uncomprLen));
+		            Byte *uncompr, uLong uncomprLen));
 int  main               OF((int argc, char *argv[]));
 
 /* ===========================================================================
  * Test compress() and uncompress()
  */
 void test_compress(compr, comprLen, uncompr, uncomprLen)
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
     uLong comprLen, uncomprLen;
 {
     int err;
@@ -80,7 +80,7 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
 void test_gzio(out, in, uncompr, uncomprLen)
     const char *out; /* output file */
     const char *in;  /* input file */
-    Bytef *uncompr;
+    Byte *uncompr;
     int  uncomprLen;
 {
     int err;
@@ -121,7 +121,7 @@ void test_gzio(out, in, uncompr, uncomprLen)
  * Test deflate() with small buffers
  */
 void test_deflate(compr, comprLen)
-    Bytef *compr;
+    Byte *compr;
     uLong comprLen;
 {
     z_stream c_stream; /* compression stream */
@@ -159,7 +159,7 @@ void test_deflate(compr, comprLen)
  * Test inflate() with small buffers
  */
 void test_inflate(compr, comprLen, uncompr, uncomprLen)
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
     uLong comprLen, uncomprLen;
 {
     int err;
@@ -198,7 +198,7 @@ void test_inflate(compr, comprLen, uncompr, uncomprLen)
  * Test deflate() with large buffers and dynamic change of compression level
  */
 void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
     uLong comprLen, uncomprLen;
 {
     z_stream c_stream; /* compression stream */
@@ -251,7 +251,7 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
  * Test inflate() with large buffers
  */
 void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
     uLong comprLen, uncomprLen;
 {
     int err;
@@ -291,7 +291,7 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
  * Test deflate() with full flush
  */
 void test_flush(compr, comprLen)
-    Bytef *compr;
+    Byte *compr;
     uLong comprLen;
 {
     z_stream c_stream; /* compression stream */
@@ -327,7 +327,7 @@ void test_flush(compr, comprLen)
  * Test inflateSync()
  */
 void test_sync(compr, comprLen, uncompr, uncomprLen)
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
     uLong comprLen, uncomprLen;
 {
     int err;
@@ -369,7 +369,7 @@ void test_sync(compr, comprLen, uncompr, uncomprLen)
  * Test deflate() with preset dictionary
  */
 void test_dict_deflate(compr, comprLen)
-    Bytef *compr;
+    Byte *compr;
     uLong comprLen;
 {
     z_stream c_stream; /* compression stream */
@@ -405,7 +405,7 @@ void test_dict_deflate(compr, comprLen)
  * Test inflate() with a preset dictionary
  */
 void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
     uLong comprLen, uncomprLen;
 {
     int err;
@@ -458,20 +458,23 @@ int main(argc, argv)
     int argc;
     char *argv[];
 {
-    Bytef *compr, *uncompr;
+    Byte *compr, *uncompr;
-    uLong comprLen = 32750*sizeof(int); /* don't overflow on MSDOS */
+    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    = (Bytef*)malloc((uInt)comprLen);
+    compr    = (Byte*)calloc((uInt)comprLen, 1);
-    uncompr  = (Bytef*)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 1.8 1995/05/03 17:27:09 jloup Exp $ */
+/* $Id: gzio.c,v 1.13 1996/05/22 11:52:24 me Exp $ */
 
 #include <stdio.h>
 
@@ -203,8 +203,8 @@ local int get_byte(s)
 local void check_header(s)
     gz_stream *s;
 {
-    int method = 0;
+    int method; /* method byte */
-    int flags = 0;
+    int flags;  /* flags byte */
     uInt len;
     int c;
 
@@ -288,14 +288,15 @@ int gzread (file, buf, len)
     unsigned len;
 {
     gz_stream *s = (gz_stream*)file;
-    Byte *start = buf; /* starting point for crc computation */
+    Bytef *start = buf; /* starting point for crc computation */
+    Byte  *next_out; /* == stream.next_out but not forced far (for MSDOS) */
 
     if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
 
     if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
     if (s->z_err == Z_STREAM_END) return 0;  /* EOF */
 
-    s->stream.next_out = buf;
+    s->stream.next_out = next_out = buf;
     s->stream.avail_out = len;
 
     while (s->stream.avail_out != 0) {
@@ -306,14 +307,15 @@ int gzread (file, buf, len)
 	    if (n > s->stream.avail_out) n = s->stream.avail_out;
 	    if (n > 0) {
 		zmemcpy(s->stream.next_out, s->stream.next_in, n);
-		s->stream.next_out  += n;
+		next_out += n;
+		s->stream.next_out = next_out;
 		s->stream.next_in   += n;
 		s->stream.avail_out -= n;
 		s->stream.avail_in  -= n;
 	    }
 	    if (s->stream.avail_out > 0) {
-		s->stream.avail_out -= fread(s->stream.next_out,
+		s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
-					     1, s->stream.avail_out, s->file);
+					     s->file);
 	    }
 	    return (int)(len - s->stream.avail_out);
 	}
@@ -510,7 +512,7 @@ char*  gzerror (file, errnum)
 
     m =  (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
 
-    if (m == NULL || *m == '\0') m = (char*)z_errmsg[1-s->z_err];
+    if (m == NULL || *m == '\0') m = ERR_MSG(s->z_err);
 
     TRYFREE(s->msg);
     s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);

infblock.c

@@ -110,6 +110,9 @@ uInt w;
 }
 
 
+#ifdef DEBUG
+  extern uInt inflate_hufts;
+#endif
 int inflate_blocks(s, z, r)
 inflate_blocks_statef *s;
 z_stream *z;
@@ -189,7 +192,7 @@ int r;
       s->sub.left = (uInt)b & 0xffff;
       b = k = 0;                      /* dump bits */
       Tracev((stderr, "inflate:       stored length %u\n", s->sub.left));
-      s->mode = s->sub.left ? STORED : TYPE;
+      s->mode = s->sub.left ? STORED : (s->last ? DRY : TYPE);
       break;
     case STORED:
       if (n == 0)
@@ -306,6 +309,9 @@ 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);
         if (t != Z_OK)
@@ -315,7 +321,8 @@ int r;
           r = t;
           LEAVE
         }
-        Tracev((stderr, "inflate:       trees ok\n"));
+        Tracev((stderr, "inflate:       trees ok, %d * %d bytes used\n",
+              inflate_hufts, sizeof(inflate_huft)));
         if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
         {
           inflate_trees_free(td, z);
@@ -385,9 +392,8 @@ uLongf *c;
 }
 
 
-void inflate_set_dictionary(s, z, d, n)
+void inflate_set_dictionary(s, d, n)
 inflate_blocks_statef *s;
-z_stream *z;
 const Bytef *d;
 uInt  n;
 {

infblock.h

@@ -33,6 +33,5 @@ extern int inflate_blocks_free OF((
 
 extern void inflate_set_dictionary OF((
     inflate_blocks_statef *s,
-    z_stream *z,
     const Bytef *d,  /* dictionary */
     uInt  n));       /* dictionary length */

inflate.c

@@ -153,10 +153,10 @@ int inflate(z, f)
 z_stream *z;
 int f;
 {
-  int r = f;    /* to avoid warning about unused f */
+  int r;
   uInt b;
 
-  if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL)
+  if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL || f < 0)
     return Z_STREAM_ERROR;
   r = Z_BUF_ERROR;
   while (1) switch (z->state->mode)
@@ -283,12 +283,12 @@ uInt  dictLength;
   if (adler32(1L, dictionary, dictLength) != z->adler) return Z_DATA_ERROR;
   z->adler = 1L;
 
-  if (length >= (1<<z->state->wbits))
+  if (length >= ((uInt)1<<z->state->wbits))
   {
     length = (1<<z->state->wbits)-1;
     dictionary += dictLength - length;
   }
-  inflate_set_dictionary(z->state->blocks, z, dictionary, length);
+  inflate_set_dictionary(z->state->blocks, dictionary, length);
   z->state->mode = BLOCKS;
   return Z_OK;
 }

inftrees.c

@@ -6,7 +6,7 @@
 #include "zutil.h"
 #include "inftrees.h"
 
-char inflate_copyright[] = " inflate 1.0 Copyright 1995-1996 Mark Adler ";
+char inflate_copyright[] = " inflate 1.0.2 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
@@ -215,7 +215,8 @@ z_stream *zs;           /* for zalloc function */
         w += l;                 /* previous table always l bits */
 
         /* compute minimum size table less than or equal to l bits */
-        z = (z = g - w) > (uInt)l ? l : z;      /* table size upper limit */
+        z = g - w;
+        z = z > (uInt)l ? l : z;        /* table size upper limit */
         if ((f = 1 << (j = k - w)) > a + 1)     /* try a k-w bit table */
         {                       /* too few codes for k-w bit table */
           f -= a + 1;           /* deduct codes from patterns left */
@@ -268,7 +269,7 @@ z_stream *zs;           /* for zalloc function */
       }
       else
       {
-        r.exop = (Byte)e[*p - s] + 16 + 64; /* non-simple--look up in lists */
+        r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
         r.base = d[*p++ - s];
       }
 

infutil.c

@@ -26,7 +26,8 @@ z_stream *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

@@ -41,7 +41,8 @@ struct inflate_blocks_state {
       inflate_huft *tb;         /* bit length decoding tree */
     } trees;            /* if DTREE, decoding info for trees */
     struct {
-      inflate_huft *tl, *td;    /* trees to free */
+      inflate_huft *tl;
+      inflate_huft *td;         /* trees to free */
       inflate_codes_statef 
          *codes;
     } decode;           /* if CODES, current state */

minigzip.c

@@ -13,7 +13,7 @@
  * or in pipe mode.
  */
 
-/* $Id: minigzip.c,v 1.5 1995/05/03 17:27:11 jloup Exp $ */
+/* $Id: minigzip.c,v 1.9 1996/05/22 11:52:32 me Exp $ */
 
 #include <stdio.h>
 #include "zlib.h"
@@ -24,7 +24,7 @@
 #else
    extern void exit  OF((int));
 #endif
-extern int unlink OF((const char *));
+
 
 #if defined(MSDOS) || defined(OS2) || defined(WIN32)
 #  include <fcntl.h>
@@ -35,12 +35,15 @@ extern int unlink OF((const char *));
 #endif
 
 #ifdef VMS
+#  define unlink delete
 #  define GZ_SUFFIX "-gz"
 #else
 #  define GZ_SUFFIX ".gz"
 #endif
 #define SUFFIX_LEN sizeof(GZ_SUFFIX)
 
+extern int unlink OF((const char *));
+
 #define BUFLEN 4096
 #define MAX_NAME_LEN 1024
 

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 1.10 1996/05/22 11:52:34 me Exp $ */
 
 #include "deflate.h"
 
@@ -232,7 +232,7 @@ local void send_bits(s, value, length)
  */
 local void tr_static_init()
 {
-    static static_init_done = 0;
+    static int static_init_done = 0;
     int n;        /* iterates over tree elements */
     int bits;     /* bit counter */
     int length;   /* length value */

uncompr.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: uncompr.c,v 1.5 1995/05/03 17:27:12 jloup Exp $ */
+/* $Id: uncompr.c,v 1.8 1996/01/30 21:59:26 me Exp $ */
 
 #include "zlib.h"
 

zconf.h

@@ -3,14 +3,14 @@
  * 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 1.18 1996/05/23 16:51:18 me Exp $ */
 
 #ifndef _ZCONF_H
 #define _ZCONF_H
 
 /*
- * People prefering a unique prefix for all types and library functions
+ * If you *really* need a unique prefix for all types and library functions,
- * should compile with -DZ_PREFIX
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
  */
 #ifdef Z_PREFIX
 #  define deflateInit_	z_deflateInit_
@@ -20,10 +20,12 @@
 #  define inflate	z_inflate
 #  define inflateEnd	z_inflateEnd
 #  define deflateInit2_	z_deflateInit2_
+#  define deflateSetDictionary z_deflateSetDictionary
 #  define deflateCopy	z_deflateCopy
 #  define deflateReset	z_deflateReset
 #  define deflateParams	z_deflateParams
 #  define inflateInit2_	z_inflateInit2_
+#  define inflateSetDictionary z_inflateSetDictionary
 #  define inflateSync	z_inflateSync
 #  define inflateReset	z_inflateReset
 #  define compress	z_compress
@@ -72,13 +74,15 @@
 #  define STDC
 #endif
 
-#if !defined(STDC) && !defined(const)
+#ifndef STDC
+#  ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
 #    define const
 #  endif
+#endif
 
 #ifdef	__MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
 #  include <unix.h>
-#  define Byte _Byte /* Byte already used on Mac */
+#  define NO_DUMMY_DECL /* buggy compiler merges all .h files incorrectly */
 #endif
 
 /* Maximum value for memLevel in deflateInit2 */
@@ -124,7 +128,8 @@
  * 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
@@ -133,15 +138,18 @@
 #  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__)
+#if defined(__WATCOMC__) && defined(__386__) && defined(SMALL_MEDIUM)
 #  undef FAR
+#  define FAR
 #  undef SMALL_MEDIUM
 #endif
 
@@ -149,7 +157,12 @@ typedef unsigned char  Byte;  /* 8 bits */
 typedef unsigned int   uInt;  /* 16 bits or more */
 typedef unsigned long  uLong; /* 32 bits or more */
 
+#if defined(__BORLANDC__) && defined(SMALL_MEDIUM)
+   /* 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;
@@ -163,4 +176,13 @@ 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		1.0.2
+
+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, Jan 27th, 1996.
+  version 1.0.2, May 23rd, 1996.
 
   Copyright (C) 1995-1996 Jean-loup Gailly and Mark Adler
 
@@ -21,6 +21,11 @@
 
   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
@@ -32,7 +37,7 @@ extern "C" {
 
 #include "zconf.h"
 
-#define ZLIB_VERSION "1.0"
+#define ZLIB_VERSION "1.0.2"
 
 /* 
      The 'zlib' compression library provides in-memory compression and
@@ -156,16 +161,20 @@ 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 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_stream *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 +196,7 @@ extern int deflateInit OF((z_stream *strm, int level));
 */
 
 
-extern int deflate OF((z_stream *strm, int flush));
+extern int EXPORT deflate OF((z_stream *strm, int flush));
 /*
   Performs one or both of the following actions:
 
@@ -207,7 +216,9 @@ extern int deflate OF((z_stream *strm, int flush));
   more output, and updating avail_in or avail_out accordingly; avail_out
   should never be zero before the call. The application can consume the
   compressed output when it wants, for example when the output buffer is full
-  (avail_out == 0), or after each call of deflate().
+  (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
+  and with zero avail_out, it must be called again after making room in the
+  output buffer because there might be more output pending.
 
     If the parameter flush is set to Z_PARTIAL_FLUSH, the current compression
   block is terminated and flushed to the output buffer so that the
@@ -254,7 +265,7 @@ extern int deflate OF((z_stream *strm, int flush));
 */
 
 
-extern int deflateEnd OF((z_stream *strm));
+extern int EXPORT deflateEnd OF((z_stream *strm));
 /*
      All dynamically allocated data structures for this stream are freed.
    This function discards any unprocessed input and does not flush any
@@ -269,7 +280,7 @@ extern int deflateEnd OF((z_stream *strm));
 
 
 /* 
-extern int inflateInit OF((z_stream *strm));
+extern int EXPORT inflateInit OF((z_stream *strm));
 
      Initializes the internal stream state for decompression. The fields
    zalloc, zfree and opaque must be initialized before by the caller.  If
@@ -284,7 +295,7 @@ extern int inflateInit OF((z_stream *strm));
 */
 
 
-extern int inflate OF((z_stream *strm, int flush));
+extern int EXPORT inflate OF((z_stream *strm, int flush));
 /*
   Performs one or both of the following actions:
 
@@ -294,15 +305,18 @@ extern int inflate OF((z_stream *strm, int flush));
     will resume at this point for the next call of inflate().
 
   - Provide more output starting at next_out and update next_out and avail_out
-    accordingly.  inflate() always provides as much output as possible
+    accordingly.  inflate() provides as much output as possible, until there
-    (until there is no more input data or no more space in the output buffer).
+    is no more input data or no more space in the output buffer (see below
+    about the flush parameter).
 
   Before the call of inflate(), the application should ensure that at least
   one of the actions is possible, by providing more input and/or consuming
   more output, and updating the next_* and avail_* values accordingly.
   The application can consume the uncompressed output when it wants, for
   example when the output buffer is full (avail_out == 0), or after each
-  call of inflate().
+  call of inflate(). If inflate returns Z_OK and with zero avail_out, it
+  must be called again after making room in the output buffer because there
+  might be more output pending.
 
     If the parameter flush is set to Z_PARTIAL_FLUSH, inflate flushes as much
   output as possible to the output buffer. The flushing behavior of inflate is
@@ -336,7 +350,7 @@ extern int inflate OF((z_stream *strm, int flush));
 */
 
 
-extern int inflateEnd OF((z_stream *strm));
+extern int EXPORT inflateEnd OF((z_stream *strm));
 /*
      All dynamically allocated data structures for this stream are freed.
    This function discards any unprocessed input and does not flush any
@@ -354,7 +368,7 @@ extern int inflateEnd OF((z_stream *strm));
 */
 
 /*   
-extern int deflateInit2 OF((z_stream *strm,
+extern int EXPORT deflateInit2 OF((z_stream *strm,
                                    int  level,
                                    int  method,
                                    int  windowBits,
@@ -412,7 +426,7 @@ extern int deflateInit2 OF((z_stream *strm,
    deflate(). 
 */
                             
-extern int deflateSetDictionary OF((z_stream *strm,
+extern int EXPORT deflateSetDictionary OF((z_stream *strm,
                                            const Bytef *dictionary,
 				           uInt  dictLength));
 /*
@@ -441,7 +455,7 @@ extern int deflateSetDictionary OF((z_stream *strm,
    be done by deflate(). 
 */
 
-extern int deflateCopy OF((z_stream *dest,
+extern int EXPORT deflateCopy OF((z_stream *dest,
                                   z_stream *source));
 /*
      Sets the destination stream as a complete copy of the source stream.  If
@@ -464,7 +478,7 @@ extern int deflateCopy OF((z_stream *dest,
    destination.
 */
 
-extern int deflateReset OF((z_stream *strm));
+extern int EXPORT deflateReset OF((z_stream *strm));
 /*
      This function is equivalent to deflateEnd followed by deflateInit,
    but does not free and reallocate all the internal compression state.
@@ -475,7 +489,7 @@ 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_stream *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
@@ -484,12 +498,17 @@ extern int deflateParams OF((z_stream *strm, int level, int strategy));
    available so far is compressed with the old level (and may be flushed);
    the new level will take effect only at the next call of deflate().
 
+     Before the call of deflateParams, the stream state must be set as for
+   a call of deflate(), since the currently available input may have to
+   be compressed and flushed. In particular, strm->avail_out must be non-zero.
+
      deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
-   stream state was inconsistent or if a parameter was invalid.
+   stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
+   if strm->avail_out was zero.
 */
 
 /*   
-extern int inflateInit2 OF((z_stream *strm,
+extern int EXPORT inflateInit2 OF((z_stream *strm,
                                    int  windowBits));
 
      This is another version of inflateInit with more compression options. The
@@ -523,7 +542,7 @@ extern int inflateInit2 OF((z_stream *strm,
    inflate().
 */
 
-extern int inflateSetDictionary OF((z_stream *strm,
+extern int EXPORT inflateSetDictionary OF((z_stream *strm,
 				           const Bytef *dictionary,
 					   uInt  dictLength));
 /*
@@ -542,7 +561,7 @@ extern int inflateSetDictionary OF((z_stream *strm,
    inflate().
 */
 
-extern int inflateSync OF((z_stream *strm));
+extern int EXPORT inflateSync OF((z_stream *strm));
 /* 
     Skips invalid compressed data until the special marker (see deflate()
   above) can be found, or until all available input is skipped. No output
@@ -557,7 +576,7 @@ 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_stream *strm));
 /*
      This function is equivalent to inflateEnd followed by inflateInit,
    but does not free and reallocate all the internal decompression state.
@@ -578,7 +597,7 @@ 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));
 /*
      Compresses the source buffer into the destination buffer.  sourceLen is
@@ -593,7 +612,7 @@ 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));
 /*
      Decompresses the source buffer into the destination buffer.  sourceLen is
@@ -614,7 +633,7 @@ 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
@@ -626,12 +645,12 @@ 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
    fileno (in the file has been previously opened with fopen).
-   The mode parameter is as in fopen ("rb" or "wb").
+   The mode parameter is as in gzopen.
      The next call of gzclose on the returned gzFile will also close the
    file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
    descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
@@ -639,7 +658,7 @@ 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
@@ -647,14 +666,14 @@ 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
@@ -664,14 +683,14 @@ 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 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
@@ -688,7 +707,7 @@ 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
@@ -705,7 +724,7 @@ 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
@@ -727,14 +746,14 @@ 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_stream *strm, int level,
 			           const char *version, int stream_size));
-extern int inflateInit_ OF((z_stream *strm,
+extern int EXPORT inflateInit_ OF((z_stream *strm,
 				   const char *version, int stream_size));
-extern int deflateInit2_ OF((z_stream *strm, int  level, int  method,
+extern int EXPORT deflateInit2_ OF((z_stream *strm, int  level, int  method,
 				    int windowBits, int memLevel, int strategy,
 				    const char *version, int stream_size));
-extern int inflateInit2_ OF((z_stream *strm, int  windowBits,
+extern int EXPORT inflateInit2_ OF((z_stream *strm, int  windowBits,
 				    const char *version, int stream_size));
 #define deflateInit(strm, level) \
         deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
@@ -746,7 +765,7 @@ extern int inflateInit2_ OF((z_stream *strm, int  windowBits,
 #define inflateInit2(strm, windowBits) \
         inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
 
-#ifndef _Z_UTIL_H
+#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL)
     struct internal_state {int dummy;}; /* hack for buggy compilers */
 #endif
 

zlib.rc

@@ -0,0 +1,32 @@
+#include <windows.h>
+
+#define IDR_VERSION1  1
+IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
+  FILEVERSION	 1,0,2,0
+  PRODUCTVERSION 1,0,2,0
+  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",	"1.0.2\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 1.8 1995/05/03 17:27:12 jloup Exp $ */
+/* $Id: zutil.c,v 1.15 1996/05/23 17:11:36 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  */
@@ -30,6 +28,11 @@ const char *z_errmsg[10] = {
 ""};
 
 
+char *zlibVersion()
+{
+    return ZLIB_VERSION;
+}
+
 void z_error (m)
     char *m;
 {
@@ -178,7 +181,7 @@ voidpf zcalloc (opaque, items, size)
     unsigned items;
     unsigned size;
 {
-    if (opaque) opaque = 0; /* to make compiler happy */
+    if (opaque) items += size - size; /* make compiler happy */
     return (voidpf)calloc(items, size);
 }
 
@@ -186,8 +189,8 @@ void  zcfree (opaque, ptr)
     voidpf opaque;
     voidpf ptr;
 {
-    if (opaque) opaque = 0; /* to make compiler happy */
     free(ptr);
+    if (opaque) return; /* make compiler happy */
 }
 
 #endif /* MY_ZCALLOC */

zutil.h

@@ -8,7 +8,7 @@
    subject to change. Applications should only use zlib.h.
  */
 
-/* $Id: zutil.h,v 1.9 1995/05/03 17:27:12 jloup Exp $ */
+/* $Id: zutil.h,v 1.14 1996/05/22 11:52:40 me Exp $ */
 
 #ifndef _Z_UTIL_H
 #define _Z_UTIL_H
@@ -114,6 +114,10 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 
 #ifdef TOPS20
 #  define OS_CODE  0x0a
+#endif
+
+#ifdef _BEOS_
+#  define fdopen(fd,mode) NULL /* No fdopen() */
 #endif
 
         /* Common defaults */