58 files changed, 3773 insertions, 588 deletions

diff --git a/ChangeLog b/ChangeLog
index ae49267..57386a2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,54 @@
 
                 ChangeLog file for zlib
 
+Changes in 1.1.3 (9 July 1998)
+- fix "an inflate input buffer bug that shows up on rare but persistent
+  occasions" (Mark)
+- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
+- fix gzseek(..., SEEK_SET) in write mode
+- fix crc check after a gzeek (Frank Faubert)
+- fix miniunzip when the last entry in a zip file is itself a zip file
+  (J Lillge)
+- add contrib/asm586 and contrib/asm686 (Brian Raiter)
+  See http://www.muppetlabs.com/~breadbox/software/assembly.html
+- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
+- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
+- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
+- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
+- added a FAQ file
+
+- Support gzdopen on Mac with Metrowerks (Jason Linhart)
+- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
+- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
+- avoid some warnings with Borland C (Tom Tanner)
+- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
+- emulate utime() for WIN32 in contrib/untgz  (Gilles Vollant)
+- allow several arguments to configure (Tim Mooney, Frodo Looijaard)
+- use libdir and includedir in Makefile.in (Tim Mooney)
+- support shared libraries on OSF1 V4 (Tim Mooney)
+- remove so_locations in "make clean"  (Tim Mooney)
+- fix maketree.c compilation error (Glenn, Mark)
+- Python interface to zlib now in Python 1.5 (Jeremy Hylton)
+- new Makefile.riscos (Rich Walker)
+- initialize static descriptors in trees.c for embedded targets (Nick Smith)
+- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
+- add the OS/2 files in Makefile.in too (Andrew Zabolotny)
+- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
+- fix maketree.c to allow clean compilation of inffixed.h (Mark)
+- fix parameter check in deflateCopy (Gunther Nikl)
+- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
+- Many portability patches by Christian Spieler:
+  . zutil.c, zutil.h: added "const" for zmem*
+  . Make_vms.com: fixed some typos
+  . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
+  . msdos/Makefile.msc: remove "default rtl link library" info from obj files
+  . msdos/Makefile.*: use model-dependent name for the built zlib library
+  . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
+     new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
+- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
+- replace __far with _far for better portability (Christian Spieler, Tom Lane)
+- fix test for errno.h in configure (Tim Newsham)
+
 Changes in 1.1.2 (19 March 98)
 - added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
   See http://www.winimage.com/zLibDll/unzip.html
diff --git a/FAQ b/FAQ
new file mode 100644
index 0000000..0feb6d3
--- /dev/null
+++ b/FAQ
@@ -0,0 +1,72 @@
+
+                Frequently Asked Questions about zlib
+
+
+If your question is not there, please check the zlib home page 
+http://www.cdrom.com/pub/infozip/zlib/ which may have more recent information.
+
+
+1) I need a Windows DLL
+2) I need a Visual Basic interface to zlib
+3) compress() returns Z_BUF_ERROR
+4) deflate or inflate returns Z_BUF_ERROR
+5) Where is the zlib documentation (man pages, etc...)?
+6) Why don't you use GNU autoconf, libtool, etc...?
+7) There is a bug in zlib.
+8) I get "undefined reference to gzputc"
+
+
+
+1) I need a Windows DLL
+
+  The zlib sources can be compiled without change to produce a DLL.
+  If you want a precompiled DLL, see http://www.winimage.com/zLibDll
+
+
+2) I need a Visual Basic interface to zlib
+
+  See http://www.tcfb.com/dowseware/cmp-z-it.zip
+      http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
+  and contrib/visual-basic.txt
+
+3) compress() returns Z_BUF_ERROR
+
+  Make sure that before the call of compress, the length of the
+  compressed buffer is equal to the total size of the compressed buffer
+  and not zero.  For Visual Basic, check that this parameter is passed
+  by reference ("as any"), not by value ("as long").
+
+
+4) deflate or inflate returns Z_BUF_ERROR
+
+  Make sure that before the call avail_in and avail_out are not zero.
+
+
+5) Where is the zlib documentation (man pages, etc...)?
+
+  It's in zlib.h for the moment. Volunteers to transform this
+  to man pages, please contact jloup@gzip.org. Examples of zlib usage
+  are in the files example.c and minigzip.c.
+
+
+6) Why don't you use GNU autoconf, libtool, etc...?
+
+  Because we would like to keep zlib as a very small and simple package.
+  zlib is rather portable and doesn't need much configuration.
+
+
+7) There is a bug in zlib.
+
+  Most of the time, such problems are due to an incorrect usage
+  of zlib. Please try to reproduce the problem with a small
+  program and send us the corresponding source at zlib@quest.jpl.nasa.gov
+  Do not send multi-megabyte data files without prior agreement.
+
+
+8) I get "undefined reference to gzputc"
+
+  If "make test" produces something like
+     example.o(.text+0x174): 
+  check that you don't have old files libz.* in /usr/lib, /usr/local/lib
+  or /usr/X11R6/lib. Remove old versions then do "make install".
+
diff --git a/INDEX b/INDEX
index c405328..8a24576 100644
--- a/INDEX
+++ b/INDEX
@@ -1,9 +1,9 @@
 ChangeLog               history of changes
 INDEX                   this file
+FAQ                     Frequently Asked Questions about zlib
 Make_vms.com            script for Vax/VMS
 Makefile                makefile for Unix (generated by configure)
 Makefile.in             makefile for Unix (template for configure)
-Makefile.msc            makefile for Microsoft C 16-bit
 Makefile.riscos         makefile for RISCOS
 README                  guess what
 algorithm.txt           description of the (de)compression algorithm
@@ -19,6 +19,8 @@ msdos/Makefile.w32      makefile for Microsoft Visual C++ 32-bit
 msdos/Makefile.b32      makefile for Borland C++   32-bit
 msdos/Makefile.bor      makefile for Borland C/C++ 16-bit
 msdos/Makefile.dj2      makefile for DJGPP 2.x
+msdos/Makefile.emx      makefile for EMX 0.9c (32-bit DOS/OS2)
+msdos/Makefile.msc      makefile for Microsoft C 16-bit
 msdos/Makefile.tc       makefile for Turbo C
 msdos/Makefile.wat      makefile for Watcom C
 msdos/zlib.def          definition file for Windows DLL
@@ -26,6 +28,8 @@ msdos/zlib.rc         	definition file for Windows DLL
 
 nt/Makefile.nt          makefile for Windows NT
 nt/zlib.dnt             definition file for Windows NT DLL
+nt/Makefile.emx         makefile for EMX 0.9c/RSXNT 1.41 (Win32 Intel)
+nt/Makefile.gcc         makefile for Windows NT using GCC (mingw32)
 
 
                 zlib public header files (must be kept):
diff --git a/Make_vms.com b/Make_vms.com
index 0008d00..1c57e8f 100644
--- a/Make_vms.com
+++ b/Make_vms.com
@@ -28,15 +28,15 @@ $ if f$search("SYS$SYSTEM:MMS.EXE").eqs.""
 $  then
 $   dele example.obj;*,minigzip.obj;*
 $   CALL MAKE adler32.OBJ "CC ''CCOPT' adler32" -
-                adler32.c zutil.h zlib.h zconf.h
+                adler32.c zlib.h zconf.h
 $   CALL MAKE compress.OBJ "CC ''CCOPT' compress" -
                 compress.c zlib.h zconf.h
 $   CALL MAKE crc32.OBJ "CC ''CCOPT' crc32" -
-                crc32.c zutil.h zlib.h zconf.h
+                crc32.c zlib.h zconf.h
 $   CALL MAKE deflate.OBJ "CC ''CCOPT' deflate" -
-                deflatec.c deflate.h zutil.h zlib.h zconf.h
+                deflate.c deflate.h zutil.h zlib.h zconf.h
 $   CALL MAKE gzio.OBJ "CC ''CCOPT' gzio" -
-                gsio.c zutil.h zlib.h zconf.h
+                gzio.c zutil.h zlib.h zconf.h
 $   CALL MAKE infblock.OBJ "CC ''CCOPT' infblock" -
                 infblock.c zutil.h zlib.h zconf.h infblock.h
 $   CALL MAKE infcodes.OBJ "CC ''CCOPT' infcodes" -
diff --git a/Makefile b/Makefile
index c8bb6e9..3a3b116 100644
--- a/Makefile
+++ b/Makefile
@@ -22,8 +22,9 @@ CFLAGS=-O
 
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
+CPP=$(CC) -E
 
-VER=1.1.2
+VER=1.1.3
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -34,21 +35,27 @@ SHELL=/bin/sh
 
 prefix = /usr/local
 exec_prefix = ${prefix}
+libdir = ${exec_prefix}/lib
+includedir = ${prefix}/include
 
 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
 
+OBJA =
+# to use the asm code: make OBJA=match.o
+
 TEST_OBJS = example.o minigzip.o
 
-DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
+DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
   algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
-  nt/Makefile.nt nt/zlib.dnt amiga/Make*.??? contrib/README.contrib \
-  contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
-  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
+  nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
+  contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
+  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
+  contrib/asm[56]86/*.S contrib/iostream/*.cpp \
   contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
   contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32 \
-  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]??
-
+  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]?? \
+  contrib/delphi*/*.???
 
 all: example minigzip
 
@@ -62,10 +69,16 @@ test: all
           echo '                *** zlib test FAILED ***'; \
         fi
 
-libz.a: $(OBJS)
-        $(AR) $@ $(OBJS)
+libz.a: $(OBJS) $(OBJA)
+        $(AR) $@ $(OBJS) $(OBJA)
         -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
 
+match.o: match.S
+        $(CPP) match.S > _match.s
+        $(CC) -c _match.s
+        mv _match.o match.o
+        rm -f _match.s
+
 $(SHAREDLIB).$(VER): $(OBJS)
         $(LDSHARED) -o $@ $(OBJS)
         rm -f $(SHAREDLIB) $(SHAREDLIB).1
@@ -79,14 +92,14 @@ minigzip: minigzip.o $(LIBS)
         $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-        -@if [ ! -d $(prefix)/include  ]; then mkdir $(prefix)/include; fi
-        -@if [ ! -d $(exec_prefix)/lib ]; then mkdir $(exec_prefix)/lib; fi
-        cp zlib.h zconf.h $(prefix)/include
-        chmod 644 $(prefix)/include/zlib.h $(prefix)/include/zconf.h
-        cp $(LIBS) $(exec_prefix)/lib
-        cd $(exec_prefix)/lib; chmod 755 $(LIBS)
-        -@(cd $(exec_prefix)/lib; $(RANLIB) libz.a || true) >/dev/null 2>&1
-        cd $(exec_prefix)/lib; if test -f $(SHAREDLIB).$(VER); then \
+        -@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
+        -@if [ ! -d $(libdir) ]; then mkdir $(libdir); fi
+        cp zlib.h zconf.h $(includedir)
+        chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
+        cp $(LIBS) $(libdir)
+        cd $(libdir); chmod 755 $(LIBS)
+        -@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+        cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
           rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
           ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB); \
           ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB).1; \
@@ -96,19 +109,20 @@ install: $(LIBS)
 # ldconfig is for Linux
 
 uninstall:
-        cd $(prefix)/include; \
+        cd $(includedir); \
         v=$(VER); \
         if test -f zlib.h; then \
           v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
           rm -f zlib.h zconf.h; \
         fi; \
-        cd $(exec_prefix)/lib; rm -f libz.a; \
+        cd $(libdir); rm -f libz.a; \
         if test -f $(SHAREDLIB).$$v; then \
           rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
         fi
 
 clean:
-        rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
+        rm -f *.o *~ example minigzip libz.a libz.so* foo.gz so_locations \
+           _match.s maketree
 
 distclean:      clean
 
diff --git a/Makefile.in b/Makefile.in
index c8bb6e9..3a3b116 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -22,8 +22,9 @@ CFLAGS=-O
 
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
+CPP=$(CC) -E
 
-VER=1.1.2
+VER=1.1.3
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -34,21 +35,27 @@ SHELL=/bin/sh
 
 prefix = /usr/local
 exec_prefix = ${prefix}
+libdir = ${exec_prefix}/lib
+includedir = ${prefix}/include
 
 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
 
+OBJA =
+# to use the asm code: make OBJA=match.o
+
 TEST_OBJS = example.o minigzip.o
 
-DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
+DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
   algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
-  nt/Makefile.nt nt/zlib.dnt amiga/Make*.??? contrib/README.contrib \
-  contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
-  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
+  nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
+  contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
+  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
+  contrib/asm[56]86/*.S contrib/iostream/*.cpp \
   contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
   contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32 \
-  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]??
-
+  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]?? \
+  contrib/delphi*/*.???
 
 all: example minigzip
 
@@ -62,10 +69,16 @@ test: all
           echo '                *** zlib test FAILED ***'; \
         fi
 
-libz.a: $(OBJS)
-        $(AR) $@ $(OBJS)
+libz.a: $(OBJS) $(OBJA)
+        $(AR) $@ $(OBJS) $(OBJA)
         -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
 
+match.o: match.S
+        $(CPP) match.S > _match.s
+        $(CC) -c _match.s
+        mv _match.o match.o
+        rm -f _match.s
+
 $(SHAREDLIB).$(VER): $(OBJS)
         $(LDSHARED) -o $@ $(OBJS)
         rm -f $(SHAREDLIB) $(SHAREDLIB).1
@@ -79,14 +92,14 @@ minigzip: minigzip.o $(LIBS)
         $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-        -@if [ ! -d $(prefix)/include  ]; then mkdir $(prefix)/include; fi
-        -@if [ ! -d $(exec_prefix)/lib ]; then mkdir $(exec_prefix)/lib; fi
-        cp zlib.h zconf.h $(prefix)/include
-        chmod 644 $(prefix)/include/zlib.h $(prefix)/include/zconf.h
-        cp $(LIBS) $(exec_prefix)/lib
-        cd $(exec_prefix)/lib; chmod 755 $(LIBS)
-        -@(cd $(exec_prefix)/lib; $(RANLIB) libz.a || true) >/dev/null 2>&1
-        cd $(exec_prefix)/lib; if test -f $(SHAREDLIB).$(VER); then \
+        -@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
+        -@if [ ! -d $(libdir) ]; then mkdir $(libdir); fi
+        cp zlib.h zconf.h $(includedir)
+        chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
+        cp $(LIBS) $(libdir)
+        cd $(libdir); chmod 755 $(LIBS)
+        -@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+        cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
           rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
           ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB); \
           ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB).1; \
@@ -96,19 +109,20 @@ install: $(LIBS)
 # ldconfig is for Linux
 
 uninstall:
-        cd $(prefix)/include; \
+        cd $(includedir); \
         v=$(VER); \
         if test -f zlib.h; then \
           v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
           rm -f zlib.h zconf.h; \
         fi; \
-        cd $(exec_prefix)/lib; rm -f libz.a; \
+        cd $(libdir); rm -f libz.a; \
         if test -f $(SHAREDLIB).$$v; then \
           rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
         fi
 
 clean:
-        rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
+        rm -f *.o *~ example minigzip libz.a libz.so* foo.gz so_locations \
+           _match.s maketree
 
 distclean:      clean
 
diff --git a/Makefile.riscos b/Makefile.riscos
index 0f10aa8..d97f449 100644
--- a/Makefile.riscos
+++ b/Makefile.riscos
@@ -1,8 +1,9 @@
 # Project:   zlib_1_03
-
+# Patched for zlib 1.1.2 rw@shadow.org.uk 19980430
+# test works out-of-the-box, installs `somewhere' on demand
 
 # Toolflags:
-CCflags = -c -depend !Depend -IC: -g -throwback  -DRISCOS  -fnah 
+CCflags = -c -depend !Depend -IC: -g -throwback  -DRISCOS  -fah 
 C++flags = -c -depend !Depend -IC: -throwback
 Linkflags = -aif -c++ -o $@ 
 ObjAsmflags = -throwback -NoCache -depend !Depend
@@ -10,37 +11,141 @@ CMHGflags =
 LibFileflags = -c -l -o $@ 
 Squeezeflags = -o $@
 
+# change the line below to where _you_ want the library installed.
+libdest = lib:zlib
 
 # Final targets:
-@.zlib_lib:   @.o.adler32 @.o.compress @.o.crc32 @.o.deflate @.o.gzio \
+@.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 
+        @.o.uncompr @.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 
+        @.o.trees @.o.uncompr @.o.zutil 
+test:   @.minigzip @.example @.lib
+        @copy @.lib @.libc  A~C~DF~L~N~P~Q~RS~TV
+        @echo running tests: hang on.
+        @/@.minigzip -f -9 libc
+        @/@.minigzip -d libc-gz
+        @/@.minigzip -f -1 libc
+        @/@.minigzip -d libc-gz
+        @/@.minigzip -h -9 libc
+        @/@.minigzip -d libc-gz
+        @/@.minigzip -h -1 libc
+        @/@.minigzip -d libc-gz
+        @/@.minigzip -9 libc
+        @/@.minigzip -d libc-gz
+        @/@.minigzip -1 libc
+        @/@.minigzip -d libc-gz
+        @diff @.lib @.libc
+        @echo that should have reported '@.lib and @.libc identical' if you have diff.
+        @/@.example @.fred @.fred
+        @echo that will have given lots of hello!'s.
+
+@.minigzip:   @.o.minigzip @.lib C:o.Stubs 
+        Link $(Linkflags) @.o.minigzip @.lib C:o.Stubs 
+@.example:   @.o.example @.lib C:o.Stubs 
+        Link $(Linkflags) @.o.example @.lib C:o.Stubs
 
+install: @.lib
+        cdir $(libdest)
+        cdir $(libdest).h
+        @copy @.h.zlib $(libdest).h.zlib A~C~DF~L~N~P~Q~RS~TV
+        @copy @.h.zconf $(libdest).h.zconf A~C~DF~L~N~P~Q~RS~TV
+        @copy @.lib $(libdest).lib  A~C~DF~L~N~P~Q~RS~TV
+        @echo okay, installed zlib in $(libdest)
+
+clean:; remove @.minigzip
+        remove @.example
+        remove @.libc
+        -wipe @.o.* F~r~cV
+        remove @.fred
 
 # 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:      c.example
 o.example:      h.zlib
 o.example:      h.zconf
+o.minigzip:     c.minigzip
+o.minigzip:     h.zlib
+o.minigzip:     h.zconf
+o.adler32:      c.adler32
+o.adler32:      h.zlib
+o.adler32:      h.zconf
+o.compress:     c.compress
+o.compress:     h.zlib
+o.compress:     h.zconf
+o.crc32:        c.crc32
+o.crc32:        h.zlib
+o.crc32:        h.zconf
+o.deflate:      c.deflate
+o.deflate:      h.deflate
+o.deflate:      h.zutil
+o.deflate:      h.zlib
+o.deflate:      h.zconf
+o.gzio: c.gzio
+o.gzio: h.zutil
+o.gzio: h.zlib
+o.gzio: h.zconf
+o.infblock:     c.infblock
+o.infblock:     h.zutil
+o.infblock:     h.zlib
+o.infblock:     h.zconf
+o.infblock:     h.infblock
+o.infblock:     h.inftrees
+o.infblock:     h.infcodes
+o.infblock:     h.infutil
+o.infcodes:     c.infcodes
+o.infcodes:     h.zutil
+o.infcodes:     h.zlib
+o.infcodes:     h.zconf
+o.infcodes:     h.inftrees
+o.infcodes:     h.infblock
+o.infcodes:     h.infcodes
+o.infcodes:     h.infutil
+o.infcodes:     h.inffast
+o.inffast:      c.inffast
+o.inffast:      h.zutil
+o.inffast:      h.zlib
+o.inffast:      h.zconf
+o.inffast:      h.inftrees
+o.inffast:      h.infblock
+o.inffast:      h.infcodes
+o.inffast:      h.infutil
+o.inffast:      h.inffast
+o.inflate:      c.inflate
+o.inflate:      h.zutil
+o.inflate:      h.zlib
+o.inflate:      h.zconf
+o.inflate:      h.infblock
+o.inftrees:     c.inftrees
+o.inftrees:     h.zutil
+o.inftrees:     h.zlib
+o.inftrees:     h.zconf
+o.inftrees:     h.inftrees
+o.inftrees:     h.inffixed
+o.infutil:      c.infutil
+o.infutil:      h.zutil
+o.infutil:      h.zlib
+o.infutil:      h.zconf
+o.infutil:      h.infblock
+o.infutil:      h.inftrees
+o.infutil:      h.infcodes
+o.infutil:      h.infutil
+o.trees:        c.trees
+o.trees:        h.deflate
+o.trees:        h.zutil
+o.trees:        h.zlib
+o.trees:        h.zconf
+o.trees:        h.trees
+o.uncompr:      c.uncompr
+o.uncompr:      h.zlib
+o.uncompr:      h.zconf
+o.zutil:        c.zutil
+o.zutil:        h.zutil
+o.zutil:        h.zlib
+o.zutil:        h.zconf
diff --git a/README b/README
index 2471d5c..8ff4587 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-zlib 1.1.2 is a general purpose data compression library.  All the code
+zlib 1.1.3 is a general purpose data compression library.  All the code
 is thread safe.  The data format used by the zlib library
 is described by RFCs (Request for Comments) 1950 to 1952 in the files 
 ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
@@ -14,35 +14,41 @@ except example.c and minigzip.c.
 
 To compile all files and run the test program, follow the instructions
 given at the top of Makefile. In short "make test; make install"
-should work for most machines.  For MSDOS, use one of the special
-makefiles such as Makefile.msc; for VMS, use Make_vms.com or descrip.mms.
+should work for most machines. For Unix: "configure; make test; make install"
+For MSDOS, use one of the special 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.
+Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov>, or to
+Gilles Vollant <info@winimage.com> for the Windows DLL version.
 The zlib home page is http://www.cdrom.com/pub/infozip/zlib/
 The official zlib ftp site is ftp://ftp.cdrom.com/pub/infozip/zlib/
+Before reporting a problem, please check those sites to verify that
+you have the latest version of zlib; otherwise get the latest version and
+check whether the problem still exists or not.
+
 Mark Nelson <markn@tiny.com> wrote an article about zlib for the Jan. 1997
 issue of  Dr. Dobb's Journal; a copy of the article is available in
 http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.1.2 are documented in the file ChangeLog.
-The main changes since 1.1.1 are:
-
-- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
-  See http://www.winimage.com/zLibDll/unzip.html
-- preinitialize the inflate tables for fixed codes, to make the code
-  completely thread safe (Mark)
-- some simplifications and slight speed-up to the inflate code (Mark)
-- fix gzeof on non-compressed files (Allan Schrum)
-- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
-- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
-- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
-- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
-- do not wrap extern "C" around system includes (Tom Lane)
-- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
-- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
-- allow "configure --prefix $HOME" (Tim Mooney)
-
+The changes made in version 1.1.3 are documented in the file ChangeLog.
+The main changes since 1.1.2 are:
+
+- fix "an inflate input buffer bug that shows up on rare but persistent
+  occasions" (Mark)
+- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
+- fix gzseek(..., SEEK_SET) in write mode
+- fix crc check after a gzeek (Frank Faubert)
+- fix miniunzip when the last entry in a zip file is itself a zip file
+  (J Lillge)
+- add contrib/asm586 and contrib/asm686 (Brian Raiter)
+  See http://www.muppetlabs.com/~breadbox/software/assembly.html
+- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
+- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
+- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
+- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
+- added a FAQ file
+
+plus many changes for portability.
 
 Unsupported third party contributions are provided in directory "contrib".
 
@@ -55,8 +61,8 @@ 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*
 
 A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
-is available from the Python Software Association sites, such as:
-ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
+is available in Python 1.5 and later versions, see
+http://www.python.org/doc/lib/module-zlib.html
 
 A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com>
 is availlable at http://www.westend.com/~kupries/doc/trf/man/man.html
@@ -77,8 +83,8 @@ Notes for some targets:
 
   From Visual Basic, you can call the DLL functions which do not take
   a structure as argument: compress, uncompress and all gz* functions.
-  See contrib/visual-basic.txt for more information.
-  I don't know how to handle structures in Visual Basic, sorry.
+  See contrib/visual-basic.txt for more information, or get
+  http://www.tcfb.com/dowseware/cmp-z-it.zip
 
 - For 64-bit Irix, deflate.c must be compiled without any optimization.
   With -O, one libpng test fails. The test works in 32 bit mode (with
@@ -93,15 +99,14 @@ Notes for some targets:
 - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works
   with other compilers. Use "make test" to check your compiler.
 
-- For shared memory multiprocessors, the decompression code assumes that
-  writes to pointers are atomic. Also the functions zalloc and zfree passed
-  to deflateInit must be multi-threaded in this case.
-
 - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
 
 - For Turbo C the small model is supported only with reduced performance to
   avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
 
+- For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html
+  Per Harald Myrvang <perm@stud.cs.uit.no>
+
 
 Acknowledgments:
 
diff --git a/configure b/configure
index d188e6f..e894235 100755
--- a/configure
+++ b/configure
@@ -24,18 +24,34 @@ 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-'${prefix}'}
+libdir=${libdir-'${exec_prefix}/lib'}
+includedir=${includedir-'${prefix}/include'}
 shared_ext='.so'
 shared=0
 gcc=0
 old_cc="$CC"
 old_cflags="$CFLAGS"
 
+while test $# -ge 1
+do
 case "$1" in
-  -h* | --h*) echo 'syntax: configure [ --shared ] [--prefix PREFIX]'; exit 0;;
-  -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
-  -p* | --p*) prefix="$2"; shift; shift;;
-  -s* | --s*) shared=1; shift;;
-esac
+    -h* | --h*)
+      echo 'usage:'
+      echo '  configure [--shared] [--prefix=PREFIX]  [--exec_prefix=EXPREFIX]'
+      echo '     [--libdir=LIBDIR] [--includedir=INCLUDEDIR]'
+        exit 0;;
+    -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -e*=* | --e*=*) exec_prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -l*=* | --libdir=*) libdir=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -i*=* | --includedir=*) includedir=`echo $1 | sed 's/[-a-z_]*=//'`;shift;;
+    -p* | --p*) prefix="$2"; shift; shift;;
+    -e* | --e*) exec_prefix="$2"; shift; shift;;
+    -l* | --l*) libdir="$2"; shift; shift;;
+    -i* | --i*) includedir="$2"; shift; shift;;
+    -s* | --s*) shared=1; shift;;
+    esac
+done
 
 test=ztest$$
 cat > $test.c <<EOF
@@ -46,6 +62,7 @@ EOF
 test -z "$CC" && echo Checking for gcc...
 cc=${CC-gcc}
 cflags=${CFLAGS-"-O3"}
+# to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
 case "$cc" in
   *gcc*) gcc=1;;
 esac
@@ -71,7 +88,10 @@ else
   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
              CFLAGS=${CFLAGS-"-ansi -O2"}
              LDSHARED=${LDSHARED-"cc -shared"};;
-  OSF1)      SFLAGS=${CFLAGS-"-O -std1"}
+  OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
+             CFLAGS=${CFLAGS-"-O -std1"}
+             LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,$SHAREDLIB -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;
+  OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
              CFLAGS=${CFLAGS-"-O -std1"}
              LDSHARED=${LDSHARED-"cc -shared"};;
   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
@@ -124,11 +144,25 @@ if test $shared -eq 0; then
   echo Building static library $LIBS version $VER with $CC.
 fi
 
-if test -f /usr/include/unistd.h; then
+cat > $test.c <<EOF
+#include <unistd.h>
+int main() { return 0; }
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
   CFLAGS="$CFLAGS -DHAVE_UNISTD_H"
+  echo "Checking for unistd.h... Yes."
+else
+  echo "Checking for unistd.h... No."
 fi
 
-if test ! -f /usr/include/errno.h; then
+cat > $test.c <<EOF
+#include <errno.h>
+int main() { return 0; }
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  echo "Checking for errno.h...  Yes."
+else
+  echo "Checking for errno.h...  No."
   CFLAGS="$CFLAGS -DNO_ERRNO_H"
 fi
 
@@ -147,12 +181,24 @@ else
   echo Checking for mmap support... No.
 fi
 
+CPP=${CPP-"$CC -E"}
+case $CFLAGS in
+  *ASMV*)
+    if test "`nm $test.o | grep _hello`" = ""; then
+      CPP="$CPP -DNO_UNDERLINE"
+      echo Checking for underline in external names... No.
+    else
+      echo Checking for underline in external names... Yes.
+    fi;;
+esac
+
 rm -f $test.[co] $test$shared_ext
 
 # udpate Makefile
 sed < Makefile.in "
 /^CC *=/s%=.*%=$CC%
 /^CFLAGS *=/s%=.*%=$CFLAGS%
+/^CPP *=/s%=.*%=$CPP%
 /^LDSHARED *=/s%=.*%=$LDSHARED%
 /^LIBS *=/s%=.*%=$LIBS%
 /^SHAREDLIB *=/s%=.*%=$SHAREDLIB%
@@ -160,4 +206,7 @@ sed < Makefile.in "
 /^RANLIB *=/s%=.*%=$RANLIB%
 /^VER *=/s%=.*%=$VER%
 /^prefix *=/s%=.*%=$prefix%
+/^exec_prefix *=/s%=.*%=$exec_prefix%
+/^libdir *=/s%=.*%=$libdir%
+/^includedir *=/s%=.*%=$includedir%
 " > Makefile
diff --git a/contrib/README.contrib b/contrib/README.contrib
index dfe9031..7ad191c 100644
--- a/contrib/README.contrib
+++ b/contrib/README.contrib
@@ -7,6 +7,16 @@ for help about these, not the zlib authors. Thanks.
 asm386/     by Gilles Vollant <info@winimage.com>
         386 asm code replacing longest_match(), for Visual C++ 4.2 and ML 6.11c
 
+asm586/ and asm686/    by Brian Raiter <breadbox@muppetlabs.com> 
+        asm code for Pentium and Pentium Pro
+        See http://www.muppetlabs.com/~breadbox/software/assembly.html
+
+delphi/      by Bob Dellaca <bobdl@xtra.co.nz>
+        Support for Delphi
+
+delphi2/     by Davide Moretti <dave@rimini.com>
+        Another support for C++Builder and Delphi
+
 minizip/    by Gilles Vollant <info@winimage.com>
         Mini zip and unzip based on zlib
         See http://www.winimage.com/zLibDll/unzip.html
diff --git a/contrib/asm586/README.586 b/contrib/asm586/README.586
new file mode 100644
index 0000000..6bb78f3
--- /dev/null
+++ b/contrib/asm586/README.586
@@ -0,0 +1,43 @@
+This is a patched version of zlib modified to use
+Pentium-optimized assembly code in the deflation algorithm. The files
+changed/added by this patch are:
+
+README.586
+match.S
+
+The effectiveness of these modifications is a bit marginal, as the the
+program's bottleneck seems to be mostly L1-cache contention, for which
+there is no real way to work around without rewriting the basic
+algorithm. The speedup on average is around 5-10% (which is generally
+less than the amount of variance between subsequent executions).
+However, when used at level 9 compression, the cache contention can
+drop enough for the assembly version to achieve 10-20% speedup (and
+sometimes more, depending on the amount of overall redundancy in the
+files). Even here, though, cache contention can still be the limiting
+factor, depending on the nature of the program using the zlib library.
+This may also mean that better improvements will be seen on a Pentium
+with MMX, which suffers much less from L1-cache contention, but I have
+not yet verified this.
+
+Note that this code has been tailored for the Pentium in particular,
+and will not perform well on the Pentium Pro (due to the use of a
+partial register in the inner loop).
+
+If you are using an assembler other than GNU as, you will have to
+translate match.S to use your assembler's syntax. (Have fun.)
+
+Brian Raiter
+breadbox@muppetlabs.com
+April, 1998
+
+
+Added for zlib 1.1.3:
+
+The patches come from
+http://www.muppetlabs.com/~breadbox/software/assembly.html
+
+To compile zlib with this asm file, copy match.S to the zlib directory
+then do:
+
+CFLAGS="-O3 -DASMV" ./configure
+make OBJA=match.o
diff --git a/contrib/asm586/match.S b/contrib/asm586/match.S
new file mode 100644
index 0000000..8f16140
--- /dev/null
+++ b/contrib/asm586/match.S
@@ -0,0 +1,354 @@
+/* match.s -- Pentium-optimized version of longest_match()
+ * Written for zlib 1.1.2
+ * Copyright (C) 1998 Brian Raiter <breadbox@muppetlabs.com>
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License.
+ */
+
+#ifndef NO_UNDERLINE
+#define match_init      _match_init
+#define longest_match   _longest_match
+#endif
+
+#define MAX_MATCH       (258)
+#define MIN_MATCH       (3)
+#define MIN_LOOKAHEAD   (MAX_MATCH + MIN_MATCH + 1)
+#define MAX_MATCH_8     ((MAX_MATCH + 7) & ~7)
+
+/* stack frame offsets */
+
+#define wmask                   0       /* local copy of s->wmask       */
+#define window                  4       /* local copy of s->window      */
+#define windowbestlen           8       /* s->window + bestlen          */
+#define chainlenscanend         12      /* high word: current chain len */
+                                        /* low word: last bytes sought  */
+#define scanstart               16      /* first two bytes of string    */
+#define scanalign               20      /* dword-misalignment of string */
+#define nicematch               24      /* a good enough match size     */
+#define bestlen                 28      /* size of best match so far    */
+#define scan                    32      /* ptr to string wanting match  */
+
+#define LocalVarsSize           (36)
+/*      saved ebx               36 */
+/*      saved edi               40 */
+/*      saved esi               44 */
+/*      saved ebp               48 */
+/*      return address          52 */
+#define deflatestate            56      /* the function arguments       */
+#define curmatch                60
+
+/* Offsets for fields in the deflate_state structure. These numbers
+ * are calculated from the definition of deflate_state, with the
+ * assumption that the compiler will dword-align the fields. (Thus,
+ * changing the definition of deflate_state could easily cause this
+ * program to crash horribly, without so much as a warning at
+ * compile time. Sigh.)
+ */
+#define dsWSize                 36
+#define dsWMask                 44
+#define dsWindow                48
+#define dsPrev                  56
+#define dsMatchLen              88
+#define dsPrevMatch             92
+#define dsStrStart              100
+#define dsMatchStart            104
+#define dsLookahead             108
+#define dsPrevLen               112
+#define dsMaxChainLen           116
+#define dsGoodMatch             132
+#define dsNiceMatch             136
+
+
+.file "match.S"
+
+.globl  match_init, longest_match
+
+.text
+
+/* uInt longest_match(deflate_state *deflatestate, IPos curmatch) */
+
+longest_match:
+
+/* Save registers that the compiler may be using, and adjust %esp to    */
+/* make room for our stack frame.                                       */
+
+                pushl   %ebp
+                pushl   %edi
+                pushl   %esi
+                pushl   %ebx
+                subl    $LocalVarsSize, %esp
+
+/* Retrieve the function arguments. %ecx will hold cur_match            */
+/* throughout the entire function. %edx will hold the pointer to the    */
+/* deflate_state structure during the function's setup (before          */
+/* entering the main loop).                                             */
+
+                movl    deflatestate(%esp), %edx
+                movl    curmatch(%esp), %ecx
+
+/* if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;      */
+
+                movl    dsNiceMatch(%edx), %eax
+                movl    dsLookahead(%edx), %ebx
+                cmpl    %eax, %ebx
+                jl      LookaheadLess
+                movl    %eax, %ebx
+LookaheadLess:  movl    %ebx, nicematch(%esp)
+
+/* register Bytef *scan = s->window + s->strstart;                      */
+
+                movl    dsWindow(%edx), %esi
+                movl    %esi, window(%esp)
+                movl    dsStrStart(%edx), %ebp
+                lea     (%esi,%ebp), %edi
+                movl    %edi, scan(%esp)
+
+/* Determine how many bytes the scan ptr is off from being              */
+/* dword-aligned.                                                       */
+
+                movl    %edi, %eax
+                negl    %eax
+                andl    $3, %eax
+                movl    %eax, scanalign(%esp)
+
+/* IPos limit = s->strstart > (IPos)MAX_DIST(s) ?                       */
+/*     s->strstart - (IPos)MAX_DIST(s) : NIL;                           */
+
+                movl    dsWSize(%edx), %eax
+                subl    $MIN_LOOKAHEAD, %eax
+                subl    %eax, %ebp
+                jg      LimitPositive
+                xorl    %ebp, %ebp
+LimitPositive:
+
+/* unsigned chain_length = s->max_chain_length;                         */
+/* if (s->prev_length >= s->good_match) {                               */
+/*     chain_length >>= 2;                                              */
+/* }                                                                    */
+
+                movl    dsPrevLen(%edx), %eax
+                movl    dsGoodMatch(%edx), %ebx
+                cmpl    %ebx, %eax
+                movl    dsMaxChainLen(%edx), %ebx
+                jl      LastMatchGood
+                shrl    $2, %ebx
+LastMatchGood:
+
+/* chainlen is decremented once beforehand so that the function can     */
+/* use the sign flag instead of the zero flag for the exit test.        */
+/* It is then shifted into the high word, to make room for the scanend  */
+/* scanend value, which it will always accompany.                       */
+
+                decl    %ebx
+                shll    $16, %ebx
+
+/* int best_len = s->prev_length;                                       */
+
+                movl    dsPrevLen(%edx), %eax
+                movl    %eax, bestlen(%esp)
+
+/* Store the sum of s->window + best_len in %esi locally, and in %esi.  */
+
+                addl    %eax, %esi
+                movl    %esi, windowbestlen(%esp)
+
+/* register ush scan_start = *(ushf*)scan;                              */
+/* register ush scan_end   = *(ushf*)(scan+best_len-1);                 */
+
+                movw    (%edi), %bx
+                movw    %bx, scanstart(%esp)
+                movw    -1(%edi,%eax), %bx
+                movl    %ebx, chainlenscanend(%esp)
+
+/* Posf *prev = s->prev;                                                */
+/* uInt wmask = s->w_mask;                                              */
+
+                movl    dsPrev(%edx), %edi
+                movl    dsWMask(%edx), %edx
+                mov     %edx, wmask(%esp)
+
+/* Jump into the main loop.                                             */
+
+                jmp     LoopEntry
+
+.balign 16
+
+/* do {
+ *     match = s->window + cur_match;
+ *     if (*(ushf*)(match+best_len-1) != scan_end ||
+ *         *(ushf*)match != scan_start) continue;
+ *     [...]
+ * } while ((cur_match = prev[cur_match & wmask]) > limit
+ *          && --chain_length != 0);
+ *
+ * Here is the inner loop of the function. The function will spend the
+ * majority of its time in this loop, and majority of that time will
+ * be spent in the first ten instructions.
+ *
+ * Within this loop:
+ * %ebx = chainlenscanend - i.e., ((chainlen << 16) | scanend)
+ * %ecx = curmatch
+ * %edx = curmatch & wmask
+ * %esi = windowbestlen - i.e., (window + bestlen)
+ * %edi = prev
+ * %ebp = limit
+ *
+ * Two optimization notes on the choice of instructions:
+ *
+ * The first instruction uses a 16-bit address, which costs an extra,
+ * unpairable cycle. This is cheaper than doing a 32-bit access and
+ * zeroing the high word, due to the 3-cycle misalignment penalty which
+ * would occur half the time. This also turns out to be cheaper than
+ * doing two separate 8-bit accesses, as the memory is so rarely in the
+ * L1 cache.
+ *
+ * The window buffer, however, apparently spends a lot of time in the
+ * cache, and so it is faster to retrieve the word at the end of the
+ * match string with two 8-bit loads. The instructions that test the
+ * word at the beginning of the match string, however, are executed
+ * much less frequently, and there it was cheaper to use 16-bit
+ * instructions, which avoided the necessity of saving off and
+ * subsequently reloading one of the other registers.
+ */
+LookupLoop:
+                                                        /* 1 U & V  */
+                movw    (%edi,%edx,2), %cx              /* 2 U pipe */
+                movl    wmask(%esp), %edx               /* 2 V pipe */
+                cmpl    %ebp, %ecx                      /* 3 U pipe */
+                jbe     LeaveNow                        /* 3 V pipe */
+                subl    $0x00010000, %ebx               /* 4 U pipe */
+                js      LeaveNow                        /* 4 V pipe */
+LoopEntry:      movb    -1(%esi,%ecx), %al              /* 5 U pipe */
+                andl    %ecx, %edx                      /* 5 V pipe */
+                cmpb    %bl, %al                        /* 6 U pipe */
+                jnz     LookupLoop                      /* 6 V pipe */
+                movb    (%esi,%ecx), %ah
+                cmpb    %bh, %ah
+                jnz     LookupLoop
+                movl    window(%esp), %eax
+                movw    (%eax,%ecx), %ax
+                cmpw    scanstart(%esp), %ax
+                jnz     LookupLoop
+
+/* Store the current value of chainlen.                                 */
+
+                movl    %ebx, chainlenscanend(%esp)
+
+/* Point %edi to the string under scrutiny, and %esi to the string we   */
+/* are hoping to match it up with. In actuality, %esi and %edi are      */
+/* both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and %edx is      */
+/* initialized to -(MAX_MATCH_8 - scanalign).                           */
+
+                movl    window(%esp), %esi
+                movl    scan(%esp), %edi
+                addl    %ecx, %esi
+                movl    scanalign(%esp), %eax
+                movl    $(-MAX_MATCH_8), %edx
+                lea     MAX_MATCH_8(%edi,%eax), %edi
+                lea     MAX_MATCH_8(%esi,%eax), %esi
+
+/* Test the strings for equality, 8 bytes at a time. At the end,
+ * adjust %edx so that it is offset to the exact byte that mismatched.
+ *
+ * We already know at this point that the first three bytes of the
+ * strings match each other, and they can be safely passed over before
+ * starting the compare loop. So what this code does is skip over 0-3
+ * bytes, as much as necessary in order to dword-align the %edi
+ * pointer. (%esi will still be misaligned three times out of four.)
+ *
+ * It should be confessed that this loop usually does not represent
+ * much of the total running time. Replacing it with a more
+ * straightforward "rep cmpsb" would not drastically degrade
+ * performance.
+ */
+LoopCmps:
+                movl    (%esi,%edx), %eax
+                movl    (%edi,%edx), %ebx
+                xorl    %ebx, %eax
+                jnz     LeaveLoopCmps
+                movl    4(%esi,%edx), %eax
+                movl    4(%edi,%edx), %ebx
+                xorl    %ebx, %eax
+                jnz     LeaveLoopCmps4
+                addl    $8, %edx
+                jnz     LoopCmps
+                jmp     LenMaximum
+LeaveLoopCmps4: addl    $4, %edx
+LeaveLoopCmps:  testl   $0x0000FFFF, %eax
+                jnz     LenLower
+                addl    $2, %edx
+                shrl    $16, %eax
+LenLower:       subb    $1, %al
+                adcl    $0, %edx
+
+/* Calculate the length of the match. If it is longer than MAX_MATCH,   */
+/* then automatically accept it as the best possible match and leave.   */
+
+                lea     (%edi,%edx), %eax
+                movl    scan(%esp), %edi
+                subl    %edi, %eax
+                cmpl    $MAX_MATCH, %eax
+                jge     LenMaximum
+
+/* If the length of the match is not longer than the best match we      */
+/* have so far, then forget it and return to the lookup loop.           */
+
+                movl    deflatestate(%esp), %edx
+                movl    bestlen(%esp), %ebx
+                cmpl    %ebx, %eax
+                jg      LongerMatch
+                movl    chainlenscanend(%esp), %ebx
+                movl    windowbestlen(%esp), %esi
+                movl    dsPrev(%edx), %edi
+                movl    wmask(%esp), %edx
+                andl    %ecx, %edx
+                jmp     LookupLoop
+
+/*         s->match_start = cur_match;                                  */
+/*         best_len = len;                                              */
+/*         if (len >= nice_match) break;                                */
+/*         scan_end = *(ushf*)(scan+best_len-1);                        */
+
+LongerMatch:    movl    nicematch(%esp), %ebx
+                movl    %eax, bestlen(%esp)
+                movl    %ecx, dsMatchStart(%edx)
+                cmpl    %ebx, %eax
+                jge     LeaveNow
+                movl    window(%esp), %esi
+                addl    %eax, %esi
+                movl    %esi, windowbestlen(%esp)
+                movl    chainlenscanend(%esp), %ebx
+                movw    -1(%edi,%eax), %bx
+                movl    dsPrev(%edx), %edi
+                movl    %ebx, chainlenscanend(%esp)
+                movl    wmask(%esp), %edx
+                andl    %ecx, %edx
+                jmp     LookupLoop
+
+/* Accept the current string, with the maximum possible length.         */
+
+LenMaximum:     movl    deflatestate(%esp), %edx
+                movl    $MAX_MATCH, bestlen(%esp)
+                movl    %ecx, dsMatchStart(%edx)
+
+/* if ((uInt)best_len <= s->lookahead) return (uInt)best_len;           */
+/* return s->lookahead;                                                 */
+
+LeaveNow:
+                movl    deflatestate(%esp), %edx
+                movl    bestlen(%esp), %ebx
+                movl    dsLookahead(%edx), %eax
+                cmpl    %eax, %ebx
+                jg      LookaheadRet
+                movl    %ebx, %eax
+LookaheadRet:
+
+/* Restore the stack and return from whence we came.                    */
+
+                addl    $LocalVarsSize, %esp
+                popl    %ebx
+                popl    %esi
+                popl    %edi
+                popl    %ebp
+match_init:     ret
diff --git a/contrib/asm686/README.686 b/contrib/asm686/README.686
new file mode 100644
index 0000000..a593f23
--- /dev/null
+++ b/contrib/asm686/README.686
@@ -0,0 +1,34 @@
+This is a patched version of zlib, modified to use
+Pentium-Pro-optimized assembly code in the deflation algorithm. The
+files changed/added by this patch are:
+
+README.686
+match.S
+
+The speedup that this patch provides varies, depending on whether the
+compiler used to build the original version of zlib falls afoul of the
+PPro's speed traps. My own tests show a speedup of around 10-20% at
+the default compression level, and 20-30% using -9, against a version
+compiled using gcc 2.7.2.3. Your mileage may vary.
+
+Note that this code has been tailored for the PPro/PII in particular,
+and will not perform particuarly well on a Pentium.
+
+If you are using an assembler other than GNU as, you will have to
+translate match.S to use your assembler's syntax. (Have fun.)
+
+Brian Raiter
+breadbox@muppetlabs.com
+April, 1998
+
+
+Added for zlib 1.1.3:
+
+The patches come from
+http://www.muppetlabs.com/~breadbox/software/assembly.html
+
+To compile zlib with this asm file, copy match.S to the zlib directory
+then do:
+
+CFLAGS="-O3 -DASMV" ./configure
+make OBJA=match.o
diff --git a/contrib/asm686/match.S b/contrib/asm686/match.S
new file mode 100644
index 0000000..8e86c33
--- /dev/null
+++ b/contrib/asm686/match.S
@@ -0,0 +1,327 @@
+/* match.s -- Pentium-Pro-optimized version of longest_match()
+ * Written for zlib 1.1.2
+ * Copyright (C) 1998 Brian Raiter <breadbox@muppetlabs.com>
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License.
+ */
+
+#ifndef NO_UNDERLINE
+#define match_init      _match_init
+#define longest_match   _longest_match
+#endif
+
+#define MAX_MATCH       (258)
+#define MIN_MATCH       (3)
+#define MIN_LOOKAHEAD   (MAX_MATCH + MIN_MATCH + 1)
+#define MAX_MATCH_8     ((MAX_MATCH + 7) & ~7)
+
+/* stack frame offsets */
+
+#define chainlenwmask           0       /* high word: current chain len */
+                                        /* low word: s->wmask           */
+#define window                  4       /* local copy of s->window      */
+#define windowbestlen           8       /* s->window + bestlen          */
+#define scanstart               16      /* first two bytes of string    */
+#define scanend                 12      /* last two bytes of string     */
+#define scanalign               20      /* dword-misalignment of string */
+#define nicematch               24      /* a good enough match size     */
+#define bestlen                 28      /* size of best match so far    */
+#define scan                    32      /* ptr to string wanting match  */
+
+#define LocalVarsSize           (36)
+/*      saved ebx               36 */
+/*      saved edi               40 */
+/*      saved esi               44 */
+/*      saved ebp               48 */
+/*      return address          52 */
+#define deflatestate            56      /* the function arguments       */
+#define curmatch                60
+
+/* Offsets for fields in the deflate_state structure. These numbers
+ * are calculated from the definition of deflate_state, with the
+ * assumption that the compiler will dword-align the fields. (Thus,
+ * changing the definition of deflate_state could easily cause this
+ * program to crash horribly, without so much as a warning at
+ * compile time. Sigh.)
+ */
+#define dsWSize                 36
+#define dsWMask                 44
+#define dsWindow                48
+#define dsPrev                  56
+#define dsMatchLen              88
+#define dsPrevMatch             92
+#define dsStrStart              100
+#define dsMatchStart            104
+#define dsLookahead             108
+#define dsPrevLen               112
+#define dsMaxChainLen           116
+#define dsGoodMatch             132
+#define dsNiceMatch             136
+
+
+.file "match.S"
+
+.globl  match_init, longest_match
+
+.text
+
+/* uInt longest_match(deflate_state *deflatestate, IPos curmatch) */
+
+longest_match:
+
+/* Save registers that the compiler may be using, and adjust %esp to    */
+/* make room for our stack frame.                                       */
+
+                pushl   %ebp
+                pushl   %edi
+                pushl   %esi
+                pushl   %ebx
+                subl    $LocalVarsSize, %esp
+
+/* Retrieve the function arguments. %ecx will hold cur_match            */
+/* throughout the entire function. %edx will hold the pointer to the    */
+/* deflate_state structure during the function's setup (before          */
+/* entering the main loop).                                             */
+
+                movl    deflatestate(%esp), %edx
+                movl    curmatch(%esp), %ecx
+
+/* uInt wmask = s->w_mask;                                              */
+/* unsigned chain_length = s->max_chain_length;                         */
+/* if (s->prev_length >= s->good_match) {                               */
+/*     chain_length >>= 2;                                              */
+/* }                                                                    */
+
+                movl    dsPrevLen(%edx), %eax
+                movl    dsGoodMatch(%edx), %ebx
+                cmpl    %ebx, %eax
+                movl    dsWMask(%edx), %eax
+                movl    dsMaxChainLen(%edx), %ebx
+                jl      LastMatchGood
+                shrl    $2, %ebx
+LastMatchGood:
+
+/* chainlen is decremented once beforehand so that the function can     */
+/* use the sign flag instead of the zero flag for the exit test.        */
+/* It is then shifted into the high word, to make room for the wmask    */
+/* value, which it will always accompany.                               */
+
+                decl    %ebx
+                shll    $16, %ebx
+                orl     %eax, %ebx
+                movl    %ebx, chainlenwmask(%esp)
+
+/* if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;      */
+
+                movl    dsNiceMatch(%edx), %eax
+                movl    dsLookahead(%edx), %ebx
+                cmpl    %eax, %ebx
+                jl      LookaheadLess
+                movl    %eax, %ebx
+LookaheadLess:  movl    %ebx, nicematch(%esp)
+
+/* register Bytef *scan = s->window + s->strstart;                      */
+
+                movl    dsWindow(%edx), %esi
+                movl    %esi, window(%esp)
+                movl    dsStrStart(%edx), %ebp
+                lea     (%esi,%ebp), %edi
+                movl    %edi, scan(%esp)
+
+/* Determine how many bytes the scan ptr is off from being              */
+/* dword-aligned.                                                       */
+
+                movl    %edi, %eax
+                negl    %eax
+                andl    $3, %eax
+                movl    %eax, scanalign(%esp)
+
+/* IPos limit = s->strstart > (IPos)MAX_DIST(s) ?                       */
+/*     s->strstart - (IPos)MAX_DIST(s) : NIL;                           */
+
+                movl    dsWSize(%edx), %eax
+                subl    $MIN_LOOKAHEAD, %eax
+                subl    %eax, %ebp
+                jg      LimitPositive
+                xorl    %ebp, %ebp
+LimitPositive:
+
+/* int best_len = s->prev_length;                                       */
+
+                movl    dsPrevLen(%edx), %eax
+                movl    %eax, bestlen(%esp)
+
+/* Store the sum of s->window + best_len in %esi locally, and in %esi.  */
+
+                addl    %eax, %esi
+                movl    %esi, windowbestlen(%esp)
+
+/* register ush scan_start = *(ushf*)scan;                              */
+/* register ush scan_end   = *(ushf*)(scan+best_len-1);                 */
+/* Posf *prev = s->prev;                                                */
+
+                movzwl  (%edi), %ebx
+                movl    %ebx, scanstart(%esp)
+                movzwl  -1(%edi,%eax), %ebx
+                movl    %ebx, scanend(%esp)
+                movl    dsPrev(%edx), %edi
+
+/* Jump into the main loop.                                             */
+
+                movl    chainlenwmask(%esp), %edx
+                jmp     LoopEntry
+
+.balign 16
+
+/* do {
+ *     match = s->window + cur_match;
+ *     if (*(ushf*)(match+best_len-1) != scan_end ||
+ *         *(ushf*)match != scan_start) continue;
+ *     [...]
+ * } while ((cur_match = prev[cur_match & wmask]) > limit
+ *          && --chain_length != 0);
+ *
+ * Here is the inner loop of the function. The function will spend the
+ * majority of its time in this loop, and majority of that time will
+ * be spent in the first ten instructions.
+ *
+ * Within this loop:
+ * %ebx = scanend
+ * %ecx = curmatch
+ * %edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
+ * %esi = windowbestlen - i.e., (window + bestlen)
+ * %edi = prev
+ * %ebp = limit
+ */
+LookupLoop:
+                andl    %edx, %ecx
+                movzwl  (%edi,%ecx,2), %ecx
+                cmpl    %ebp, %ecx
+                jbe     LeaveNow
+                subl    $0x00010000, %edx
+                js      LeaveNow
+LoopEntry:      movzwl  -1(%esi,%ecx), %eax
+                cmpl    %ebx, %eax
+                jnz     LookupLoop
+                movl    window(%esp), %eax
+                movzwl  (%eax,%ecx), %eax
+                cmpl    scanstart(%esp), %eax
+                jnz     LookupLoop
+
+/* Store the current value of chainlen.                                 */
+
+                movl    %edx, chainlenwmask(%esp)
+
+/* Point %edi to the string under scrutiny, and %esi to the string we   */
+/* are hoping to match it up with. In actuality, %esi and %edi are      */
+/* both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and %edx is      */
+/* initialized to -(MAX_MATCH_8 - scanalign).                           */
+
+                movl    window(%esp), %esi
+                movl    scan(%esp), %edi
+                addl    %ecx, %esi
+                movl    scanalign(%esp), %eax
+                movl    $(-MAX_MATCH_8), %edx
+                lea     MAX_MATCH_8(%edi,%eax), %edi
+                lea     MAX_MATCH_8(%esi,%eax), %esi
+
+/* Test the strings for equality, 8 bytes at a time. At the end,
+ * adjust %edx so that it is offset to the exact byte that mismatched.
+ *
+ * We already know at this point that the first three bytes of the
+ * strings match each other, and they can be safely passed over before
+ * starting the compare loop. So what this code does is skip over 0-3
+ * bytes, as much as necessary in order to dword-align the %edi
+ * pointer. (%esi will still be misaligned three times out of four.)
+ *
+ * It should be confessed that this loop usually does not represent
+ * much of the total running time. Replacing it with a more
+ * straightforward "rep cmpsb" would not drastically degrade
+ * performance.
+ */
+LoopCmps:
+                movl    (%esi,%edx), %eax
+                xorl    (%edi,%edx), %eax
+                jnz     LeaveLoopCmps
+                movl    4(%esi,%edx), %eax
+                xorl    4(%edi,%edx), %eax
+                jnz     LeaveLoopCmps4
+                addl    $8, %edx
+                jnz     LoopCmps
+                jmp     LenMaximum
+LeaveLoopCmps4: addl    $4, %edx
+LeaveLoopCmps:  testl   $0x0000FFFF, %eax
+                jnz     LenLower
+                addl    $2, %edx
+                shrl    $16, %eax
+LenLower:       subb    $1, %al
+                adcl    $0, %edx
+
+/* Calculate the length of the match. If it is longer than MAX_MATCH,   */
+/* then automatically accept it as the best possible match and leave.   */
+
+                lea     (%edi,%edx), %eax
+                movl    scan(%esp), %edi
+                subl    %edi, %eax
+                cmpl    $MAX_MATCH, %eax
+                jge     LenMaximum
+
+/* If the length of the match is not longer than the best match we      */
+/* have so far, then forget it and return to the lookup loop.           */
+
+                movl    deflatestate(%esp), %edx
+                movl    bestlen(%esp), %ebx
+                cmpl    %ebx, %eax
+                jg      LongerMatch
+                movl    windowbestlen(%esp), %esi
+                movl    dsPrev(%edx), %edi
+                movl    scanend(%esp), %ebx
+                movl    chainlenwmask(%esp), %edx
+                jmp     LookupLoop
+
+/*         s->match_start = cur_match;                                  */
+/*         best_len = len;                                              */
+/*         if (len >= nice_match) break;                                */
+/*         scan_end = *(ushf*)(scan+best_len-1);                        */
+
+LongerMatch:    movl    nicematch(%esp), %ebx
+                movl    %eax, bestlen(%esp)
+                movl    %ecx, dsMatchStart(%edx)
+                cmpl    %ebx, %eax
+                jge     LeaveNow
+                movl    window(%esp), %esi
+                addl    %eax, %esi
+                movl    %esi, windowbestlen(%esp)
+                movzwl  -1(%edi,%eax), %ebx
+                movl    dsPrev(%edx), %edi
+                movl    %ebx, scanend(%esp)
+                movl    chainlenwmask(%esp), %edx
+                jmp     LookupLoop
+
+/* Accept the current string, with the maximum possible length.         */
+
+LenMaximum:     movl    deflatestate(%esp), %edx
+                movl    $MAX_MATCH, bestlen(%esp)
+                movl    %ecx, dsMatchStart(%edx)
+
+/* if ((uInt)best_len <= s->lookahead) return (uInt)best_len;           */
+/* return s->lookahead;                                                 */
+
+LeaveNow:
+                movl    deflatestate(%esp), %edx
+                movl    bestlen(%esp), %ebx
+                movl    dsLookahead(%edx), %eax
+                cmpl    %eax, %ebx
+                jg      LookaheadRet
+                movl    %ebx, %eax
+LookaheadRet:
+
+/* Restore the stack and return from whence we came.                    */
+
+                addl    $LocalVarsSize, %esp
+                popl    %ebx
+                popl    %esi
+                popl    %edi
+                popl    %ebp
+match_init:     ret
diff --git a/contrib/delphi/zlib.mak b/contrib/delphi/zlib.mak
new file mode 100644
index 0000000..ba557e2
--- /dev/null
+++ b/contrib/delphi/zlib.mak
@@ -0,0 +1,36 @@
+# Makefile for zlib32bd.lib
+# ------------- Borland C++ 4.5 -------------
+
+# The (32-bit) zlib32bd.lib made with this makefile is intended for use 
+# in making the (32-bit) DLL, png32bd.dll. It uses the "stdcall" calling 
+# convention.
+
+CFLAGS= -ps -O2 -C -K -N- -k- -d -3 -r- -w-par -w-aus -WDE
+CC=f:\bc45\bin\bcc32
+LIBFLAGS= /C
+LIB=f:\bc45\bin\tlib
+ZLIB=zlib32bd.lib
+
+.autodepend
+.c.obj:
+        $(CC) -c $(CFLAGS) $<
+
+OBJ1=adler32.obj compress.obj crc32.obj deflate.obj gzio.obj infblock.obj 
+OBJ2=infcodes.obj inflate.obj inftrees.obj infutil.obj inffast.obj 
+OBJ3=trees.obj uncompr.obj zutil.obj
+pOBJ1=+adler32.obj+compress.obj+crc32.obj+deflate.obj+gzio.obj+infblock.obj 
+pOBJ2=+infcodes.obj+inflate.obj+inftrees.obj+infutil.obj+inffast.obj 
+pOBJ3=+trees.obj+uncompr.obj+zutil.obj
+
+all: $(ZLIB)
+
+$(ZLIB): $(OBJ1) $(OBJ2) $(OBJ3)
+        @if exist $@ del $@
+        $(LIB) @&&|
+$@ $(LIBFLAGS) &
+$(pOBJ1) &
+$(pOBJ2) &
+$(pOBJ3)
+|
+
+# End of makefile for zlib32bd.lib
diff --git a/contrib/delphi/zlibdef.pas b/contrib/delphi/zlibdef.pas
new file mode 100644
index 0000000..4f96b7d
--- /dev/null
+++ b/contrib/delphi/zlibdef.pas
@@ -0,0 +1,169 @@
+unit zlibdef;
+
+interface
+
+uses
+  Windows;
+
+const
+  ZLIB_VERSION = '1.1.3';
+
+type
+  voidpf = Pointer;
+  int    = Integer;
+  uInt   = Cardinal;
+  pBytef = PChar;
+  uLong  = Cardinal;
+
+  alloc_func = function(opaque: voidpf; items, size: uInt): voidpf;
+                    stdcall;
+  free_func  = procedure(opaque, address: voidpf);
+                    stdcall;
+
+  internal_state = Pointer;
+
+  z_streamp = ^z_stream;
+  z_stream = packed record
+    next_in: pBytef;          // next input byte
+    avail_in: uInt;           // number of bytes available at next_in
+    total_in: uLong;          // total nb of input bytes read so far
+
+    next_out: pBytef;         // next output byte should be put there
+    avail_out: uInt;          // remaining free space at next_out
+    total_out: uLong;         // total nb of bytes output so far
+
+    msg: PChar;               // last error message, NULL if no error
+    state: internal_state;    // not visible by applications
+
+    zalloc: alloc_func;       // used to allocate the internal state
+    zfree: free_func;         // used to free the internal state
+    opaque: voidpf;           // private data object passed to zalloc and zfree
+
+    data_type: int;           // best guess about the data type: ascii or binary
+    adler: uLong;             // adler32 value of the uncompressed data
+    reserved: uLong;          // reserved for future use
+    end;
+
+const
+  Z_NO_FLUSH      = 0;
+  Z_SYNC_FLUSH    = 2;
+  Z_FULL_FLUSH    = 3;
+  Z_FINISH        = 4;
+
+  Z_OK            = 0;
+  Z_STREAM_END    = 1;
+
+  Z_NO_COMPRESSION         =  0;
+  Z_BEST_SPEED             =  1;
+  Z_BEST_COMPRESSION       =  9;
+  Z_DEFAULT_COMPRESSION    = -1;
+
+  Z_FILTERED            = 1;
+  Z_HUFFMAN_ONLY        = 2;
+  Z_DEFAULT_STRATEGY    = 0;
+
+  Z_BINARY   = 0;
+  Z_ASCII    = 1;
+  Z_UNKNOWN  = 2;
+
+  Z_DEFLATED    = 8;
+
+  MAX_MEM_LEVEL = 9;
+
+function adler32(adler: uLong; const buf: pBytef; len: uInt): uLong;
+             stdcall;
+function crc32(crc: uLong; const buf: pBytef; len: uInt): uLong;
+             stdcall;
+function deflate(strm: z_streamp; flush: int): int;
+             stdcall;
+function deflateCopy(dest, source: z_streamp): int;
+             stdcall;
+function deflateEnd(strm: z_streamp): int;
+             stdcall;
+function deflateInit2_(strm: z_streamp; level, method,
+                       windowBits, memLevel, strategy: int;
+                       const version: PChar; stream_size: int): int;
+             stdcall;
+function deflateInit_(strm: z_streamp; level: int;
+                      const version: PChar; stream_size: int): int;
+             stdcall;
+function deflateParams(strm: z_streamp; level, strategy: int): int;
+             stdcall;
+function deflateReset(strm: z_streamp): int;
+             stdcall;
+function deflateSetDictionary(strm: z_streamp;
+                              const dictionary: pBytef;
+                              dictLength: uInt): int;
+             stdcall;
+function inflate(strm: z_streamp; flush: int): int;
+             stdcall;
+function inflateEnd(strm: z_streamp): int;
+             stdcall;
+function inflateInit2_(strm: z_streamp; windowBits: int;
+                       const version: PChar; stream_size: int): int;
+             stdcall;
+function inflateInit_(strm: z_streamp; const version: PChar;
+                      stream_size: int): int;
+             stdcall;
+function inflateReset(strm: z_streamp): int;
+             stdcall;
+function inflateSetDictionary(strm: z_streamp;
+                              const dictionary: pBytef;
+                              dictLength: uInt): int;
+             stdcall;
+function inflateSync(strm: z_streamp): int;
+             stdcall;
+
+function deflateInit(strm: z_streamp; level: int): int;
+function deflateInit2(strm: z_streamp; level, method, windowBits,
+                      memLevel, strategy: int): int;
+function inflateInit(strm: z_streamp): int;
+function inflateInit2(strm: z_streamp; windowBits: int): int;
+
+implementation
+
+function deflateInit(strm: z_streamp; level: int): int;
+begin
+  Result := deflateInit_(strm, level, ZLIB_VERSION, sizeof(z_stream));
+end;
+
+function deflateInit2(strm: z_streamp; level, method, windowBits,
+                      memLevel, strategy: int): int;
+begin
+  Result := deflateInit2_(strm, level, method, windowBits, memLevel,
+                          strategy, ZLIB_VERSION, sizeof(z_stream));
+end;
+
+function inflateInit(strm: z_streamp): int;
+begin
+  Result := inflateInit_(strm, ZLIB_VERSION, sizeof(z_stream));
+end;
+
+function inflateInit2(strm: z_streamp; windowBits: int): int;
+begin
+  Result := inflateInit2_(strm, windowBits, ZLIB_VERSION,
+                          sizeof(z_stream));
+end;
+
+const
+  zlibDLL = 'png32bd.dll';
+
+function adler32; external zlibDLL;
+function crc32; external zlibDLL;
+function deflate; external zlibDLL;
+function deflateCopy; external zlibDLL;
+function deflateEnd; external zlibDLL;
+function deflateInit2_; external zlibDLL;
+function deflateInit_; external zlibDLL;
+function deflateParams; external zlibDLL;
+function deflateReset; external zlibDLL;
+function deflateSetDictionary; external zlibDLL;
+function inflate; external zlibDLL;
+function inflateEnd; external zlibDLL;
+function inflateInit2_; external zlibDLL;
+function inflateInit_; external zlibDLL;
+function inflateReset; external zlibDLL;
+function inflateSetDictionary; external zlibDLL;
+function inflateSync; external zlibDLL;
+
+end.
diff --git a/contrib/delphi2/d_zlib.bpr b/contrib/delphi2/d_zlib.bpr
new file mode 100644
index 0000000..78bb254
--- /dev/null
+++ b/contrib/delphi2/d_zlib.bpr
@@ -0,0 +1,224 @@
+# ---------------------------------------------------------------------------
+!if !$d(BCB)
+BCB = $(MAKEDIR)\..
+!endif
+
+# ---------------------------------------------------------------------------
+# IDE SECTION
+# ---------------------------------------------------------------------------
+# The following section of the project makefile is managed by the BCB IDE.
+# It is recommended to use the IDE to change any of the values in this
+# section.
+# ---------------------------------------------------------------------------
+
+VERSION = BCB.03
+# ---------------------------------------------------------------------------
+PROJECT = d_zlib.lib
+OBJFILES = d_zlib.obj adler32.obj deflate.obj infblock.obj infcodes.obj inffast.obj \
+  inflate.obj inftrees.obj infutil.obj trees.obj
+RESFILES =
+RESDEPEN = $(RESFILES)
+LIBFILES =
+LIBRARIES = VCL35.lib
+SPARELIBS = VCL35.lib
+DEFFILE =
+PACKAGES = VCLX35.bpi VCL35.bpi VCLDB35.bpi VCLDBX35.bpi ibsmp35.bpi bcbsmp35.bpi \
+  dclocx35.bpi QRPT35.bpi TEEUI35.bpi TEEDB35.bpi TEE35.bpi DSS35.bpi \
+  NMFAST35.bpi INETDB35.bpi INET35.bpi VCLMID35.bpi
+# ---------------------------------------------------------------------------
+PATHCPP = .;
+PATHASM = .;
+PATHPAS = .;
+PATHRC = .;
+DEBUGLIBPATH = $(BCB)\lib\debug
+RELEASELIBPATH = $(BCB)\lib\release
+# ---------------------------------------------------------------------------
+CFLAG1 = -O2 -Ve -d -k- -vi
+CFLAG2 = -I$(BCB)\include;$(BCB)\include\vcl -H=$(BCB)\lib\vcl35.csm
+CFLAG3 = -ff -pr -5
+PFLAGS = -U;$(DEBUGLIBPATH) -I$(BCB)\include;$(BCB)\include\vcl -H -W -$I- -v -JPHN -M
+RFLAGS = -i$(BCB)\include;$(BCB)\include\vcl 
+AFLAGS = /i$(BCB)\include /i$(BCB)\include\vcl /mx /w2 /zn
+LFLAGS =
+IFLAGS = -g -Gn
+# ---------------------------------------------------------------------------
+ALLOBJ = c0w32.obj $(OBJFILES)
+ALLRES = $(RESFILES)
+ALLLIB = $(LIBFILES) $(LIBRARIES) import32.lib cp32mt.lib
+# ---------------------------------------------------------------------------
+!!ifdef IDEOPTIONS
+
+[Version Info]
+IncludeVerInfo=0
+AutoIncBuild=0
+MajorVer=1
+MinorVer=0
+Release=0
+Build=0
+Debug=0
+PreRelease=0
+Special=0
+Private=0
+DLL=0
+Locale=1040
+CodePage=1252
+
+[Version Info Keys]
+CompanyName=
+FileDescription=
+FileVersion=1.0.0.0
+InternalName=
+LegalCopyright=
+LegalTrademarks=
+OriginalFilename=
+ProductName=
+ProductVersion=1.0.0.0
+Comments=
+
+[HistoryLists\hlIncludePath]
+Count=2
+Item0=$(BCB)\include
+Item1=$(BCB)\include;$(BCB)\include\vcl
+
+[HistoryLists\hlLibraryPath]
+Count=1
+Item0=$(BCB)\lib\obj;$(BCB)\lib
+
+[HistoryLists\hlDebugSourcePath]
+Count=1
+Item0=$(BCB)\source\vcl
+
+[Debugging]
+DebugSourceDirs=
+
+[Parameters]
+RunParams=
+HostApplication=
+
+!endif
+
+ ---------------------------------------------------------------------------
+# MAKE SECTION
+# ---------------------------------------------------------------------------
+# This section of the project file is not used by the BCB IDE.  It is for
+# the benefit of building from the command-line using the MAKE utility.
+# ---------------------------------------------------------------------------
+
+.autodepend
+# ---------------------------------------------------------------------------
+!if !$d(BCC32)
+BCC32 = bcc32
+!endif
+
+!if !$d(DCC32)
+DCC32 = dcc32
+!endif
+
+!if !$d(TASM32)
+TASM32 = tasm32
+!endif
+
+!if !$d(LINKER)
+LINKER = TLib
+!endif
+
+!if !$d(BRCC32)
+BRCC32 = brcc32
+!endif
+# ---------------------------------------------------------------------------
+!if $d(PATHCPP)
+.PATH.CPP = $(PATHCPP)
+.PATH.C   = $(PATHCPP)
+!endif
+
+!if $d(PATHPAS)
+.PATH.PAS = $(PATHPAS)
+!endif
+
+!if $d(PATHASM)
+.PATH.ASM = $(PATHASM)
+!endif
+
+!if $d(PATHRC)
+.PATH.RC  = $(PATHRC)
+!endif
+# ---------------------------------------------------------------------------
+!ifdef IDEOPTIONS
+
+[Version Info]
+IncludeVerInfo=0
+AutoIncBuild=0
+MajorVer=1
+MinorVer=0
+Release=0
+Build=0
+Debug=0
+PreRelease=0
+Special=0
+Private=0
+DLL=0
+Locale=1040
+CodePage=1252
+
+[Version Info Keys]
+CompanyName=
+FileDescription=
+FileVersion=1.0.0.0
+InternalName=
+LegalCopyright=
+LegalTrademarks=
+OriginalFilename=
+ProductName=
+ProductVersion=1.0.0.0
+Comments=
+
+[HistoryLists\hlIncludePath]
+Count=2
+Item0=$(BCB)\include;$(BCB)\include\vcl
+Item1=$(BCB)\include
+
+[HistoryLists\hlLibraryPath]
+Count=1
+Item0=$(BCB)\lib\obj;$(BCB)\lib
+
+[HistoryLists\hlDebugSourcePath]
+Count=1
+Item0=$(BCB)\source\vcl
+
+[Debugging]
+DebugSourceDirs=
+
+[Parameters]
+RunParams=
+HostApplication=
+
+!endif
+
+$(PROJECT): $(OBJFILES) $(RESDEPEN) $(DEFFILE)
+    $(BCB)\BIN\$(LINKER) @&&!
+    $(LFLAGS) $(IFLAGS) +
+    $(ALLOBJ), +
+    $(PROJECT),, +
+    $(ALLLIB), +
+    $(DEFFILE), +
+    $(ALLRES)
+!
+# ---------------------------------------------------------------------------
+.pas.hpp:
+    $(BCB)\BIN\$(DCC32) $(PFLAGS) {$< }
+
+.pas.obj:
+    $(BCB)\BIN\$(DCC32) $(PFLAGS) {$< }
+
+.cpp.obj:
+    $(BCB)\BIN\$(BCC32) $(CFLAG1) $(CFLAG2) $(CFLAG3) -n$(@D) {$< }
+
+.c.obj:
+    $(BCB)\BIN\$(BCC32) $(CFLAG1) $(CFLAG2) $(CFLAG3) -n$(@D) {$< }
+
+.asm.obj:
+    $(BCB)\BIN\$(TASM32) $(AFLAGS) $<, $@
+
+.rc.res:
+    $(BCB)\BIN\$(BRCC32) $(RFLAGS) -fo$@ $<
+# ---------------------------------------------------------------------------
diff --git a/contrib/delphi2/d_zlib.cpp b/contrib/delphi2/d_zlib.cpp
new file mode 100644
index 0000000..f5dea59
--- /dev/null
+++ b/contrib/delphi2/d_zlib.cpp
@@ -0,0 +1,17 @@
+#include <condefs.h>
+#pragma hdrstop
+//---------------------------------------------------------------------------
+USEUNIT("adler32.c");
+USEUNIT("deflate.c");
+USEUNIT("infblock.c");
+USEUNIT("infcodes.c");
+USEUNIT("inffast.c");
+USEUNIT("inflate.c");
+USEUNIT("inftrees.c");
+USEUNIT("infutil.c");
+USEUNIT("trees.c");
+//---------------------------------------------------------------------------
+#define Library
+
+// To add a file to the library use the Project menu 'Add to Project'.
+
diff --git a/contrib/delphi2/readme.txt b/contrib/delphi2/readme.txt
new file mode 100644
index 0000000..cbd3162
--- /dev/null
+++ b/contrib/delphi2/readme.txt
@@ -0,0 +1,17 @@
+These are files used to compile zlib under Borland C++ Builder 3.
+
+zlib.bpg is the main project group that can be loaded in the BCB IDE and
+loads all other *.bpr projects
+
+zlib.bpr is a project used to create a static zlib.lib library with C calling
+convention for functions.
+
+zlib32.bpr creates a zlib32.dll dynamic link library with Windows standard
+calling convention.
+
+d_zlib.bpr creates a set of .obj files with register calling convention.
+These files are used by zlib.pas to create a Delphi unit containing zlib.
+The d_zlib.lib file generated isn't useful and can be deleted.
+
+zlib.cpp, zlib32.cpp and d_zlib.cpp are used by the above projects.
+
diff --git a/contrib/delphi2/zlib.bpg b/contrib/delphi2/zlib.bpg
new file mode 100644
index 0000000..b6c9acd
--- /dev/null
+++ b/contrib/delphi2/zlib.bpg
@@ -0,0 +1,26 @@
+#------------------------------------------------------------------------------
+VERSION = BWS.01
+#------------------------------------------------------------------------------
+!ifndef ROOT
+ROOT = $(MAKEDIR)\..
+!endif
+#------------------------------------------------------------------------------
+MAKE = $(ROOT)\bin\make.exe -$(MAKEFLAGS) -f$**
+DCC = $(ROOT)\bin\dcc32.exe $**
+BRCC = $(ROOT)\bin\brcc32.exe $**
+#------------------------------------------------------------------------------
+PROJECTS = zlib zlib32 d_zlib
+#------------------------------------------------------------------------------
+default: $(PROJECTS)
+#------------------------------------------------------------------------------
+
+zlib: zlib.bpr
+  $(MAKE)
+
+zlib32: zlib32.bpr
+  $(MAKE)
+
+d_zlib: d_zlib.bpr
+  $(MAKE)
+
+
diff --git a/contrib/delphi2/zlib.bpr b/contrib/delphi2/zlib.bpr
new file mode 100644
index 0000000..cf3945b
--- /dev/null
+++ b/contrib/delphi2/zlib.bpr
@@ -0,0 +1,225 @@
+# ---------------------------------------------------------------------------
+!if !$d(BCB)
+BCB = $(MAKEDIR)\..
+!endif
+
+# ---------------------------------------------------------------------------
+# IDE SECTION
+# ---------------------------------------------------------------------------
+# The following section of the project makefile is managed by the BCB IDE.
+# It is recommended to use the IDE to change any of the values in this
+# section.
+# ---------------------------------------------------------------------------
+
+VERSION = BCB.03
+# ---------------------------------------------------------------------------
+PROJECT = zlib.lib
+OBJFILES = zlib.obj adler32.obj compress.obj crc32.obj deflate.obj gzio.obj infblock.obj \
+  infcodes.obj inffast.obj inflate.obj inftrees.obj infutil.obj trees.obj \
+  uncompr.obj zutil.obj
+RESFILES =
+RESDEPEN = $(RESFILES)
+LIBFILES =
+LIBRARIES = VCL35.lib
+SPARELIBS = VCL35.lib
+DEFFILE =
+PACKAGES = VCLX35.bpi VCL35.bpi VCLDB35.bpi VCLDBX35.bpi ibsmp35.bpi bcbsmp35.bpi \
+  dclocx35.bpi QRPT35.bpi TEEUI35.bpi TEEDB35.bpi TEE35.bpi DSS35.bpi \
+  NMFAST35.bpi INETDB35.bpi INET35.bpi VCLMID35.bpi
+# ---------------------------------------------------------------------------
+PATHCPP = .;
+PATHASM = .;
+PATHPAS = .;
+PATHRC = .;
+DEBUGLIBPATH = $(BCB)\lib\debug
+RELEASELIBPATH = $(BCB)\lib\release
+# ---------------------------------------------------------------------------
+CFLAG1 = -O2 -Ve -d -k- -vi
+CFLAG2 = -I$(BCB)\include;$(BCB)\include\vcl -H=$(BCB)\lib\vcl35.csm
+CFLAG3 = -ff -5
+PFLAGS = -U;$(DEBUGLIBPATH) -I$(BCB)\include;$(BCB)\include\vcl -H -W -$I- -v -JPHN -M
+RFLAGS = -i$(BCB)\include;$(BCB)\include\vcl 
+AFLAGS = /i$(BCB)\include /i$(BCB)\include\vcl /mx /w2 /zn
+LFLAGS =
+IFLAGS = -g -Gn
+# ---------------------------------------------------------------------------
+ALLOBJ = c0w32.obj $(OBJFILES)
+ALLRES = $(RESFILES)
+ALLLIB = $(LIBFILES) $(LIBRARIES) import32.lib cp32mt.lib
+# ---------------------------------------------------------------------------
+!!ifdef IDEOPTIONS
+
+[Version Info]
+IncludeVerInfo=0
+AutoIncBuild=0
+MajorVer=1
+MinorVer=0
+Release=0
+Build=0
+Debug=0
+PreRelease=0
+Special=0
+Private=0
+DLL=0
+Locale=1040
+CodePage=1252
+
+[Version Info Keys]
+CompanyName=
+FileDescription=
+FileVersion=1.0.0.0
+InternalName=
+LegalCopyright=
+LegalTrademarks=
+OriginalFilename=
+ProductName=
+ProductVersion=1.0.0.0
+Comments=
+
+[HistoryLists\hlIncludePath]
+Count=2
+Item0=$(BCB)\include
+Item1=$(BCB)\include;$(BCB)\include\vcl
+
+[HistoryLists\hlLibraryPath]
+Count=1
+Item0=$(BCB)\lib\obj;$(BCB)\lib
+
+[HistoryLists\hlDebugSourcePath]
+Count=1
+Item0=$(BCB)\source\vcl
+
+[Debugging]
+DebugSourceDirs=
+
+[Parameters]
+RunParams=
+HostApplication=
+
+!endif
+
+ ---------------------------------------------------------------------------
+# MAKE SECTION
+# ---------------------------------------------------------------------------
+# This section of the project file is not used by the BCB IDE.  It is for
+# the benefit of building from the command-line using the MAKE utility.
+# ---------------------------------------------------------------------------
+
+.autodepend
+# ---------------------------------------------------------------------------
+!if !$d(BCC32)
+BCC32 = bcc32
+!endif
+
+!if !$d(DCC32)
+DCC32 = dcc32
+!endif
+
+!if !$d(TASM32)
+TASM32 = tasm32
+!endif
+
+!if !$d(LINKER)
+LINKER = TLib
+!endif
+
+!if !$d(BRCC32)
+BRCC32 = brcc32
+!endif
+# ---------------------------------------------------------------------------
+!if $d(PATHCPP)
+.PATH.CPP = $(PATHCPP)
+.PATH.C   = $(PATHCPP)
+!endif
+
+!if $d(PATHPAS)
+.PATH.PAS = $(PATHPAS)
+!endif
+
+!if $d(PATHASM)
+.PATH.ASM = $(PATHASM)
+!endif
+
+!if $d(PATHRC)
+.PATH.RC  = $(PATHRC)
+!endif
+# ---------------------------------------------------------------------------
+!ifdef IDEOPTIONS
+
+[Version Info]
+IncludeVerInfo=0
+AutoIncBuild=0
+MajorVer=1
+MinorVer=0
+Release=0
+Build=0
+Debug=0
+PreRelease=0
+Special=0
+Private=0
+DLL=0
+Locale=1040
+CodePage=1252
+
+[Version Info Keys]
+CompanyName=
+FileDescription=
+FileVersion=1.0.0.0
+InternalName=
+LegalCopyright=
+LegalTrademarks=
+OriginalFilename=
+ProductName=
+ProductVersion=1.0.0.0
+Comments=
+
+[HistoryLists\hlIncludePath]
+Count=2
+Item0=$(BCB)\include;$(BCB)\include\vcl
+Item1=$(BCB)\include
+
+[HistoryLists\hlLibraryPath]
+Count=1
+Item0=$(BCB)\lib\obj;$(BCB)\lib
+
+[HistoryLists\hlDebugSourcePath]
+Count=1
+Item0=$(BCB)\source\vcl
+
+[Debugging]
+DebugSourceDirs=
+
+[Parameters]
+RunParams=
+HostApplication=
+
+!endif
+
+$(PROJECT): $(OBJFILES) $(RESDEPEN) $(DEFFILE)
+    $(BCB)\BIN\$(LINKER) @&&!
+    $(LFLAGS) $(IFLAGS) +
+    $(ALLOBJ), +
+    $(PROJECT),, +
+    $(ALLLIB), +
+    $(DEFFILE), +
+    $(ALLRES)
+!
+# ---------------------------------------------------------------------------
+.pas.hpp:
+    $(BCB)\BIN\$(DCC32) $(PFLAGS) {$< }
+
+.pas.obj:
+    $(BCB)\BIN\$(DCC32) $(PFLAGS) {$< }
+
+.cpp.obj:
+    $(BCB)\BIN\$(BCC32) $(CFLAG1) $(CFLAG2) $(CFLAG3) -n$(@D) {$< }
+
+.c.obj:
+    $(BCB)\BIN\$(BCC32) $(CFLAG1) $(CFLAG2) $(CFLAG3) -n$(@D) {$< }
+
+.asm.obj:
+    $(BCB)\BIN\$(TASM32) $(AFLAGS) $<, $@
+
+.rc.res:
+    $(BCB)\BIN\$(BRCC32) $(RFLAGS) -fo$@ $<
+# ---------------------------------------------------------------------------
diff --git a/contrib/delphi2/zlib.cpp b/contrib/delphi2/zlib.cpp
new file mode 100644
index 0000000..bf6953b
--- /dev/null
+++ b/contrib/delphi2/zlib.cpp
@@ -0,0 +1,22 @@
+#include <condefs.h>
+#pragma hdrstop
+//---------------------------------------------------------------------------
+USEUNIT("adler32.c");
+USEUNIT("compress.c");
+USEUNIT("crc32.c");
+USEUNIT("deflate.c");
+USEUNIT("gzio.c");
+USEUNIT("infblock.c");
+USEUNIT("infcodes.c");
+USEUNIT("inffast.c");
+USEUNIT("inflate.c");
+USEUNIT("inftrees.c");
+USEUNIT("infutil.c");
+USEUNIT("trees.c");
+USEUNIT("uncompr.c");
+USEUNIT("zutil.c");
+//---------------------------------------------------------------------------
+#define Library
+
+// To add a file to the library use the Project menu 'Add to Project'.
+
diff --git a/contrib/delphi2/zlib.pas b/contrib/delphi2/zlib.pas
new file mode 100644
index 0000000..10ae4ca
--- /dev/null
+++ b/contrib/delphi2/zlib.pas
@@ -0,0 +1,534 @@
+{*******************************************************}
+{                                                       }
+{       Delphi Supplemental Components                  }
+{       ZLIB Data Compression Interface Unit            }
+{                                                       }
+{       Copyright (c) 1997 Borland International        }
+{                                                       }
+{*******************************************************}
+
+{ Modified for zlib 1.1.3 by Davide Moretti <dave@rimini.com }
+
+unit zlib;
+
+interface
+
+uses Sysutils, Classes;
+
+type
+  TAlloc = function (AppData: Pointer; Items, Size: Integer): Pointer;
+  TFree = procedure (AppData, Block: Pointer);
+
+  // Internal structure.  Ignore.
+  TZStreamRec = packed record
+    next_in: PChar;       // next input byte
+    avail_in: Integer;    // number of bytes available at next_in
+    total_in: Integer;    // total nb of input bytes read so far
+
+    next_out: PChar;      // next output byte should be put here
+    avail_out: Integer;   // remaining free space at next_out
+    total_out: Integer;   // total nb of bytes output so far
+
+    msg: PChar;           // last error message, NULL if no error
+    internal: Pointer;    // not visible by applications
+
+    zalloc: TAlloc;       // used to allocate the internal state
+    zfree: TFree;         // used to free the internal state
+    AppData: Pointer;     // private data object passed to zalloc and zfree
+
+    data_type: Integer;   //  best guess about the data type: ascii or binary
+    adler: Integer;       // adler32 value of the uncompressed data
+    reserved: Integer;    // reserved for future use
+  end;
+
+  // Abstract ancestor class
+  TCustomZlibStream = class(TStream)
+  private
+    FStrm: TStream;
+    FStrmPos: Integer;
+    FOnProgress: TNotifyEvent;
+    FZRec: TZStreamRec;
+    FBuffer: array [Word] of Char;
+  protected
+    procedure Progress(Sender: TObject); dynamic;
+    property OnProgress: TNotifyEvent read FOnProgress write FOnProgress;
+    constructor Create(Strm: TStream);
+  end;
+
+{ TCompressionStream compresses data on the fly as data is written to it, and
+  stores the compressed data to another stream.
+
+  TCompressionStream is write-only and strictly sequential. Reading from the
+  stream will raise an exception. Using Seek to move the stream pointer
+  will raise an exception.
+
+  Output data is cached internally, written to the output stream only when
+  the internal output buffer is full.  All pending output data is flushed
+  when the stream is destroyed.
+
+  The Position property returns the number of uncompressed bytes of
+  data that have been written to the stream so far.
+
+  CompressionRate returns the on-the-fly percentage by which the original
+  data has been compressed:  (1 - (CompressedBytes / UncompressedBytes)) * 100
+  If raw data size = 100 and compressed data size = 25, the CompressionRate
+  is 75%
+
+  The OnProgress event is called each time the output buffer is filled and
+  written to the output stream.  This is useful for updating a progress
+  indicator when you are writing a large chunk of data to the compression
+  stream in a single call.}
+
+
+  TCompressionLevel = (clNone, clFastest, clDefault, clMax);
+
+  TCompressionStream = class(TCustomZlibStream)
+  private
+    function GetCompressionRate: Single;
+  public
+    constructor Create(CompressionLevel: TCompressionLevel; Dest: TStream);
+    destructor Destroy; override;
+    function Read(var Buffer; Count: Longint): Longint; override;
+    function Write(const Buffer; Count: Longint): Longint; override;
+    function Seek(Offset: Longint; Origin: Word): Longint; override;
+    property CompressionRate: Single read GetCompressionRate;
+    property OnProgress;
+  end;
+
+{ TDecompressionStream decompresses data on the fly as data is read from it.
+
+  Compressed data comes from a separate source stream.  TDecompressionStream
+  is read-only and unidirectional; you can seek forward in the stream, but not
+  backwards.  The special case of setting the stream position to zero is
+  allowed.  Seeking forward decompresses data until the requested position in
+  the uncompressed data has been reached.  Seeking backwards, seeking relative
+  to the end of the stream, requesting the size of the stream, and writing to
+  the stream will raise an exception.
+
+  The Position property returns the number of bytes of uncompressed data that
+  have been read from the stream so far.
+
+  The OnProgress event is called each time the internal input buffer of
+  compressed data is exhausted and the next block is read from the input stream.
+  This is useful for updating a progress indicator when you are reading a
+  large chunk of data from the decompression stream in a single call.}
+
+  TDecompressionStream = class(TCustomZlibStream)
+  public
+    constructor Create(Source: TStream);
+    destructor Destroy; override;
+    function Read(var Buffer; Count: Longint): Longint; override;
+    function Write(const Buffer; Count: Longint): Longint; override;
+    function Seek(Offset: Longint; Origin: Word): Longint; override;
+    property OnProgress;
+  end;
+
+
+
+{ CompressBuf compresses data, buffer to buffer, in one call.
+   In: InBuf = ptr to compressed data
+       InBytes = number of bytes in InBuf
+  Out: OutBuf = ptr to newly allocated buffer containing decompressed data
+       OutBytes = number of bytes in OutBuf   }
+procedure CompressBuf(const InBuf: Pointer; InBytes: Integer;
+                      out OutBuf: Pointer; out OutBytes: Integer);
+
+
+{ DecompressBuf decompresses data, buffer to buffer, in one call.
+   In: InBuf = ptr to compressed data
+       InBytes = number of bytes in InBuf
+       OutEstimate = zero, or est. size of the decompressed data
+  Out: OutBuf = ptr to newly allocated buffer containing decompressed data
+       OutBytes = number of bytes in OutBuf   }
+procedure DecompressBuf(const InBuf: Pointer; InBytes: Integer;
+ OutEstimate: Integer; out OutBuf: Pointer; out OutBytes: Integer);
+
+const
+  zlib_version = '1.1.3';
+
+type
+  EZlibError = class(Exception);
+  ECompressionError = class(EZlibError);
+  EDecompressionError = class(EZlibError);
+
+function adler32(adler: Integer; buf: PChar; len: Integer): Integer;
+
+implementation
+
+const
+  Z_NO_FLUSH      = 0;
+  Z_PARTIAL_FLUSH = 1;
+  Z_SYNC_FLUSH    = 2;
+  Z_FULL_FLUSH    = 3;
+  Z_FINISH        = 4;
+
+  Z_OK            = 0;
+  Z_STREAM_END    = 1;
+  Z_NEED_DICT     = 2;
+  Z_ERRNO         = (-1);
+  Z_STREAM_ERROR  = (-2);
+  Z_DATA_ERROR    = (-3);
+  Z_MEM_ERROR     = (-4);
+  Z_BUF_ERROR     = (-5);
+  Z_VERSION_ERROR = (-6);
+
+  Z_NO_COMPRESSION       =   0;
+  Z_BEST_SPEED           =   1;
+  Z_BEST_COMPRESSION     =   9;
+  Z_DEFAULT_COMPRESSION  = (-1);
+
+  Z_FILTERED            = 1;
+  Z_HUFFMAN_ONLY        = 2;
+  Z_DEFAULT_STRATEGY    = 0;
+
+  Z_BINARY   = 0;
+  Z_ASCII    = 1;
+  Z_UNKNOWN  = 2;
+
+  Z_DEFLATED = 8;
+
+  _z_errmsg: array[0..9] of PChar = (
+    'need dictionary',      // Z_NEED_DICT      (2)
+    'stream end',           // Z_STREAM_END     (1)
+    '',                     // Z_OK             (0)
+    'file error',           // Z_ERRNO          (-1)
+    'stream error',         // Z_STREAM_ERROR   (-2)
+    'data error',           // Z_DATA_ERROR     (-3)
+    'insufficient memory',  // Z_MEM_ERROR      (-4)
+    'buffer error',         // Z_BUF_ERROR      (-5)
+    'incompatible version', // Z_VERSION_ERROR  (-6)
+    ''
+  );
+
+{$L deflate.obj}
+{$L inflate.obj}
+{$L inftrees.obj}
+{$L trees.obj}
+{$L adler32.obj}
+{$L infblock.obj}
+{$L infcodes.obj}
+{$L infutil.obj}
+{$L inffast.obj}
+
+procedure _tr_init; external;
+procedure _tr_tally; external;
+procedure _tr_flush_block; external;
+procedure _tr_align; external;
+procedure _tr_stored_block; external;
+function adler32; external;
+procedure inflate_blocks_new; external;
+procedure inflate_blocks; external;
+procedure inflate_blocks_reset; external;
+procedure inflate_blocks_free; external;
+procedure inflate_set_dictionary; external;
+procedure inflate_trees_bits; external;
+procedure inflate_trees_dynamic; external;
+procedure inflate_trees_fixed; external;
+procedure inflate_codes_new; external;
+procedure inflate_codes; external;
+procedure inflate_codes_free; external;
+procedure _inflate_mask; external;
+procedure inflate_flush; external;
+procedure inflate_fast; external;
+
+procedure _memset(P: Pointer; B: Byte; count: Integer);cdecl;
+begin
+  FillChar(P^, count, B);
+end;
+
+procedure _memcpy(dest, source: Pointer; count: Integer);cdecl;
+begin
+  Move(source^, dest^, count);
+end;
+
+
+
+// deflate compresses data
+function deflateInit_(var strm: TZStreamRec; level: Integer; version: PChar;
+  recsize: Integer): Integer; external;
+function deflate(var strm: TZStreamRec; flush: Integer): Integer; external;
+function deflateEnd(var strm: TZStreamRec): Integer; external;
+
+// inflate decompresses data
+function inflateInit_(var strm: TZStreamRec; version: PChar;
+  recsize: Integer): Integer; external;
+function inflate(var strm: TZStreamRec; flush: Integer): Integer; external;
+function inflateEnd(var strm: TZStreamRec): Integer; external;
+function inflateReset(var strm: TZStreamRec): Integer; external;
+
+
+function zcalloc(AppData: Pointer; Items, Size: Integer): Pointer;
+begin
+  GetMem(Result, Items*Size);
+end;
+
+procedure zcfree(AppData, Block: Pointer);
+begin
+  FreeMem(Block);
+end;
+
+function zlibCheck(code: Integer): Integer;
+begin
+  Result := code;
+  if code < 0 then
+    raise EZlibError.Create('error');    //!!
+end;
+
+function CCheck(code: Integer): Integer;
+begin
+  Result := code;
+  if code < 0 then
+    raise ECompressionError.Create('error'); //!!
+end;
+
+function DCheck(code: Integer): Integer;
+begin
+  Result := code;
+  if code < 0 then
+    raise EDecompressionError.Create('error');  //!!
+end;
+
+procedure CompressBuf(const InBuf: Pointer; InBytes: Integer;
+                      out OutBuf: Pointer; out OutBytes: Integer);
+var
+  strm: TZStreamRec;
+  P: Pointer;
+begin
+  FillChar(strm, sizeof(strm), 0);
+  OutBytes := ((InBytes + (InBytes div 10) + 12) + 255) and not 255;
+  GetMem(OutBuf, OutBytes);
+  try
+    strm.next_in := InBuf;
+    strm.avail_in := InBytes;
+    strm.next_out := OutBuf;
+    strm.avail_out := OutBytes;
+    CCheck(deflateInit_(strm, Z_BEST_COMPRESSION, zlib_version, sizeof(strm)));
+    try
+      while CCheck(deflate(strm, Z_FINISH)) <> Z_STREAM_END do
+      begin
+        P := OutBuf;
+        Inc(OutBytes, 256);
+        ReallocMem(OutBuf, OutBytes);
+        strm.next_out := PChar(Integer(OutBuf) + (Integer(strm.next_out) - Integer(P)));
+        strm.avail_out := 256;
+      end;
+    finally
+      CCheck(deflateEnd(strm));
+    end;
+    ReallocMem(OutBuf, strm.total_out);
+    OutBytes := strm.total_out;
+  except
+    FreeMem(OutBuf);
+    raise
+  end;
+end;
+
+
+procedure DecompressBuf(const InBuf: Pointer; InBytes: Integer;
+  OutEstimate: Integer; out OutBuf: Pointer; out OutBytes: Integer);
+var
+  strm: TZStreamRec;
+  P: Pointer;
+  BufInc: Integer;
+begin
+  FillChar(strm, sizeof(strm), 0);
+  BufInc := (InBytes + 255) and not 255;
+  if OutEstimate = 0 then
+    OutBytes := BufInc
+  else
+    OutBytes := OutEstimate;
+  GetMem(OutBuf, OutBytes);
+  try
+    strm.next_in := InBuf;
+    strm.avail_in := InBytes;
+    strm.next_out := OutBuf;
+    strm.avail_out := OutBytes;
+    DCheck(inflateInit_(strm, zlib_version, sizeof(strm)));
+    try
+      while DCheck(inflate(strm, Z_FINISH)) <> Z_STREAM_END do
+      begin
+        P := OutBuf;
+        Inc(OutBytes, BufInc);
+        ReallocMem(OutBuf, OutBytes);
+        strm.next_out := PChar(Integer(OutBuf) + (Integer(strm.next_out) - Integer(P)));
+        strm.avail_out := BufInc;
+      end;
+    finally
+      DCheck(inflateEnd(strm));
+    end;
+    ReallocMem(OutBuf, strm.total_out);
+    OutBytes := strm.total_out;
+  except
+    FreeMem(OutBuf);
+    raise
+  end;
+end;
+
+
+// TCustomZlibStream
+
+constructor TCustomZLibStream.Create(Strm: TStream);
+begin
+  inherited Create;
+  FStrm := Strm;
+  FStrmPos := Strm.Position;
+end;
+
+procedure TCustomZLibStream.Progress(Sender: TObject);
+begin
+  if Assigned(FOnProgress) then FOnProgress(Sender);
+end;
+
+
+// TCompressionStream
+
+constructor TCompressionStream.Create(CompressionLevel: TCompressionLevel;
+  Dest: TStream);
+const
+  Levels: array [TCompressionLevel] of ShortInt =
+    (Z_NO_COMPRESSION, Z_BEST_SPEED, Z_DEFAULT_COMPRESSION, Z_BEST_COMPRESSION);
+begin
+  inherited Create(Dest);
+  FZRec.next_out := FBuffer;
+  FZRec.avail_out := sizeof(FBuffer);
+  CCheck(deflateInit_(FZRec, Levels[CompressionLevel], zlib_version, sizeof(FZRec)));
+end;
+
+destructor TCompressionStream.Destroy;
+begin
+  FZRec.next_in := nil;
+  FZRec.avail_in := 0;
+  try
+    if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos;
+    while (CCheck(deflate(FZRec, Z_FINISH)) <> Z_STREAM_END)
+      and (FZRec.avail_out = 0) do
+    begin
+      FStrm.WriteBuffer(FBuffer, sizeof(FBuffer));
+      FZRec.next_out := FBuffer;
+      FZRec.avail_out := sizeof(FBuffer);
+    end;
+    if FZRec.avail_out < sizeof(FBuffer) then
+      FStrm.WriteBuffer(FBuffer, sizeof(FBuffer) - FZRec.avail_out);
+  finally
+    deflateEnd(FZRec);
+  end;
+  inherited Destroy;
+end;
+
+function TCompressionStream.Read(var Buffer; Count: Longint): Longint;
+begin
+  raise ECompressionError.Create('Invalid stream operation');
+end;
+
+function TCompressionStream.Write(const Buffer; Count: Longint): Longint;
+begin
+  FZRec.next_in := @Buffer;
+  FZRec.avail_in := Count;
+  if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos;
+  while (FZRec.avail_in > 0) do
+  begin
+    CCheck(deflate(FZRec, 0));
+    if FZRec.avail_out = 0 then
+    begin
+      FStrm.WriteBuffer(FBuffer, sizeof(FBuffer));
+      FZRec.next_out := FBuffer;
+      FZRec.avail_out := sizeof(FBuffer);
+      FStrmPos := FStrm.Position;
+      Progress(Self);
+    end;
+  end;
+  Result := Count;
+end;
+
+function TCompressionStream.Seek(Offset: Longint; Origin: Word): Longint;
+begin
+  if (Offset = 0) and (Origin = soFromCurrent) then
+    Result := FZRec.total_in
+  else
+    raise ECompressionError.Create('Invalid stream operation');
+end;
+
+function TCompressionStream.GetCompressionRate: Single;
+begin
+  if FZRec.total_in = 0 then
+    Result := 0
+  else
+    Result := (1.0 - (FZRec.total_out / FZRec.total_in)) * 100.0;
+end;
+
+
+// TDecompressionStream
+
+constructor TDecompressionStream.Create(Source: TStream);
+begin
+  inherited Create(Source);
+  FZRec.next_in := FBuffer;
+  FZRec.avail_in := 0;
+  DCheck(inflateInit_(FZRec, zlib_version, sizeof(FZRec)));
+end;
+
+destructor TDecompressionStream.Destroy;
+begin
+  inflateEnd(FZRec);
+  inherited Destroy;
+end;
+
+function TDecompressionStream.Read(var Buffer; Count: Longint): Longint;
+begin
+  FZRec.next_out := @Buffer;
+  FZRec.avail_out := Count;
+  if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos;
+  while (FZRec.avail_out > 0) do
+  begin
+    if FZRec.avail_in = 0 then
+    begin
+      FZRec.avail_in := FStrm.Read(FBuffer, sizeof(FBuffer));
+      if FZRec.avail_in = 0 then
+        begin
+          Result := Count - FZRec.avail_out;
+          Exit;
+        end;
+      FZRec.next_in := FBuffer;
+      FStrmPos := FStrm.Position;
+      Progress(Self);
+    end;
+    DCheck(inflate(FZRec, 0));
+  end;
+  Result := Count;
+end;
+
+function TDecompressionStream.Write(const Buffer; Count: Longint): Longint;
+begin
+  raise EDecompressionError.Create('Invalid stream operation');
+end;
+
+function TDecompressionStream.Seek(Offset: Longint; Origin: Word): Longint;
+var
+  I: Integer;
+  Buf: array [0..4095] of Char;
+begin
+  if (Offset = 0) and (Origin = soFromBeginning) then
+  begin
+    DCheck(inflateReset(FZRec));
+    FZRec.next_in := FBuffer;
+    FZRec.avail_in := 0;
+    FStrm.Position := 0;
+    FStrmPos := 0;
+  end
+  else if ( (Offset >= 0) and (Origin = soFromCurrent)) or
+          ( ((Offset - FZRec.total_out) > 0) and (Origin = soFromBeginning)) then
+  begin
+    if Origin = soFromBeginning then Dec(Offset, FZRec.total_out);
+    if Offset > 0 then
+    begin
+      for I := 1 to Offset div sizeof(Buf) do
+        ReadBuffer(Buf, sizeof(Buf));
+      ReadBuffer(Buf, Offset mod sizeof(Buf));
+    end;
+  end
+  else
+    raise EDecompressionError.Create('Invalid stream operation');
+  Result := FZRec.total_out;
+end;
+
+end.
diff --git a/contrib/delphi2/zlib32.bpr b/contrib/delphi2/zlib32.bpr
new file mode 100644
index 0000000..cabcec4
--- /dev/null
+++ b/contrib/delphi2/zlib32.bpr
@@ -0,0 +1,174 @@
+# ---------------------------------------------------------------------------
+!if !$d(BCB)
+BCB = $(MAKEDIR)\..
+!endif
+
+# ---------------------------------------------------------------------------
+# IDE SECTION
+# ---------------------------------------------------------------------------
+# The following section of the project makefile is managed by the BCB IDE.
+# It is recommended to use the IDE to change any of the values in this
+# section.
+# ---------------------------------------------------------------------------
+
+VERSION = BCB.03
+# ---------------------------------------------------------------------------
+PROJECT = zlib32.dll
+OBJFILES = zlib32.obj adler32.obj compress.obj crc32.obj deflate.obj gzio.obj infblock.obj \
+  infcodes.obj inffast.obj inflate.obj inftrees.obj infutil.obj trees.obj \
+  uncompr.obj zutil.obj
+RESFILES =
+RESDEPEN = $(RESFILES)
+LIBFILES =
+LIBRARIES = 
+SPARELIBS = 
+DEFFILE =
+PACKAGES = VCLX35.bpi VCL35.bpi VCLDB35.bpi VCLDBX35.bpi ibsmp35.bpi bcbsmp35.bpi \
+  dclocx35.bpi QRPT35.bpi TEEUI35.bpi TEEDB35.bpi TEE35.bpi DSS35.bpi \
+  NMFAST35.bpi INETDB35.bpi INET35.bpi VCLMID35.bpi
+# ---------------------------------------------------------------------------
+PATHCPP = .;
+PATHASM = .;
+PATHPAS = .;
+PATHRC = .;
+DEBUGLIBPATH = $(BCB)\lib\debug
+RELEASELIBPATH = $(BCB)\lib\release
+# ---------------------------------------------------------------------------
+CFLAG1 = -WD -O2 -Ve -d -k- -vi -c -tWD
+CFLAG2 = -D_NO_VCL;ZLIB_DLL -I$(BCB)\include
+CFLAG3 = -ff -5
+PFLAGS = -D_NO_VCL;ZLIB_DLL -U$(BCB)\lib;$(RELEASELIBPATH) -I$(BCB)\include -$I- -v \
+  -JPHN -M
+RFLAGS = -D_NO_VCL;ZLIB_DLL -i$(BCB)\include
+AFLAGS = /i$(BCB)\include /d_NO_VCL /dZLIB_DLL /mx /w2 /zn
+LFLAGS = -L$(BCB)\lib;$(RELEASELIBPATH) -aa -Tpd -x -Gi
+IFLAGS = -Gn -g
+# ---------------------------------------------------------------------------
+ALLOBJ = c0d32.obj $(OBJFILES)
+ALLRES = $(RESFILES)
+ALLLIB = $(LIBFILES)  import32.lib cw32mt.lib
+# ---------------------------------------------------------------------------
+!ifdef IDEOPTIONS
+
+[Version Info]
+IncludeVerInfo=0
+AutoIncBuild=0
+MajorVer=1
+MinorVer=0
+Release=0
+Build=0
+Debug=0
+PreRelease=0
+Special=0
+Private=0
+DLL=1
+Locale=1040
+CodePage=1252
+
+[Version Info Keys]
+CompanyName=
+FileDescription=DLL (GUI)
+FileVersion=1.0.0.0
+InternalName=
+LegalCopyright=
+LegalTrademarks=
+OriginalFilename=
+ProductName=
+ProductVersion=1.0.0.0
+Comments=
+
+[HistoryLists\hlIncludePath]
+Count=1
+Item0=$(BCB)\include
+
+[HistoryLists\hlLibraryPath]
+Count=1
+Item0=$(BCB)\lib
+
+[HistoryLists\hlConditionals]
+Count=1
+Item0=_NO_VCL;ZLIB_DLL
+
+[Debugging]
+DebugSourceDirs=
+
+[Parameters]
+RunParams=
+HostApplication=
+
+!endif
+
+# ---------------------------------------------------------------------------
+# MAKE SECTION
+# ---------------------------------------------------------------------------
+# This section of the project file is not used by the BCB IDE.  It is for
+# the benefit of building from the command-line using the MAKE utility.
+# ---------------------------------------------------------------------------
+
+.autodepend
+# ---------------------------------------------------------------------------
+!if !$d(BCC32)
+BCC32 = bcc32
+!endif
+
+!if !$d(DCC32)
+DCC32 = dcc32
+!endif
+
+!if !$d(TASM32)
+TASM32 = tasm32
+!endif
+
+!if !$d(LINKER)
+LINKER = ilink32
+!endif
+
+!if !$d(BRCC32)
+BRCC32 = brcc32
+!endif
+# ---------------------------------------------------------------------------
+!if $d(PATHCPP)
+.PATH.CPP = $(PATHCPP)
+.PATH.C   = $(PATHCPP)
+!endif
+
+!if $d(PATHPAS)
+.PATH.PAS = $(PATHPAS)
+!endif
+
+!if $d(PATHASM)
+.PATH.ASM = $(PATHASM)
+!endif
+
+!if $d(PATHRC)
+.PATH.RC  = $(PATHRC)
+!endif
+# ---------------------------------------------------------------------------
+$(PROJECT): $(OBJFILES) $(RESDEPEN) $(DEFFILE)
+    $(BCB)\BIN\$(LINKER) @&&!
+    $(LFLAGS) $(IFLAGS) +
+    $(ALLOBJ), +
+    $(PROJECT),, +
+    $(ALLLIB), +
+    $(DEFFILE), +
+    $(ALLRES)
+!
+# ---------------------------------------------------------------------------
+.pas.hpp:
+    $(BCB)\BIN\$(DCC32) $(PFLAGS) {$< }
+
+.pas.obj:
+    $(BCB)\BIN\$(DCC32) $(PFLAGS) {$< }
+
+.cpp.obj:
+    $(BCB)\BIN\$(BCC32) $(CFLAG1) $(CFLAG2) $(CFLAG3) -n$(@D) {$< }
+
+.c.obj:
+    $(BCB)\BIN\$(BCC32) $(CFLAG1) $(CFLAG2) $(CFLAG3) -n$(@D) {$< }
+
+.asm.obj:
+    $(BCB)\BIN\$(TASM32) $(AFLAGS) $<, $@
+
+.rc.res:
+    $(BCB)\BIN\$(BRCC32) $(RFLAGS) -fo$@ $<
+# ---------------------------------------------------------------------------
diff --git a/contrib/delphi2/zlib32.cpp b/contrib/delphi2/zlib32.cpp
new file mode 100644
index 0000000..7372f6b
--- /dev/null
+++ b/contrib/delphi2/zlib32.cpp
@@ -0,0 +1,42 @@
+
+#include <windows.h>
+#pragma hdrstop
+#include <condefs.h>
+
+
+//---------------------------------------------------------------------------
+//   Important note about DLL memory management in a VCL DLL:
+//
+//
+//
+// If your DLL uses VCL and exports any functions that pass VCL String objects
+// (or structs/classes containing nested Strings) as parameter or function
+// results, you will need to build both your DLL project and any EXE projects
+// that use your DLL with the dynamic RTL (the RTL DLL).  This will change your
+// DLL and its calling EXE's to use BORLNDMM.DLL as their memory manager. In
+// these cases, the file BORLNDMM.DLL should be deployed along with your DLL
+// and the RTL DLL (CP3240MT.DLL). To avoid the requiring BORLNDMM.DLL in
+// these situations, pass string information using "char *" or ShortString
+// parameters and then link with the static RTL.
+//
+//---------------------------------------------------------------------------
+USEUNIT("adler32.c");
+USEUNIT("compress.c");
+USEUNIT("crc32.c");
+USEUNIT("deflate.c");
+USEUNIT("gzio.c");
+USEUNIT("infblock.c");
+USEUNIT("infcodes.c");
+USEUNIT("inffast.c");
+USEUNIT("inflate.c");
+USEUNIT("inftrees.c");
+USEUNIT("infutil.c");
+USEUNIT("trees.c");
+USEUNIT("uncompr.c");
+USEUNIT("zutil.c");
+//---------------------------------------------------------------------------
+#pragma argsused
+int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void*)
+{
+        return 1;
+}
diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
index 78a8473..ff71a47 100644
--- a/contrib/minizip/unzip.c
+++ b/contrib/minizip/unzip.c
@@ -315,7 +315,7 @@ local uLong unzlocal_SearchCentralDir(fin)
                 if (fread(buf,(uInt)uReadSize,1,fin)!=1)
                         break;
 
-                for (i=0;i<(int)uReadSize-3;i++)
+                for (i=(int)uReadSize-3; (i--)>0;)
                         if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && 
                                 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
                         {
diff --git a/contrib/minizip/zip.c b/contrib/minizip/zip.c
index ddb2334..0cae64a 100644
--- a/contrib/minizip/zip.c
+++ b/contrib/minizip/zip.c
@@ -242,6 +242,8 @@ local int write_datablock(fout,ll)
    Outputs a long in LSB order to the given file
    nbByte == 1, 2 or 4 (byte, short or long)
 */
+
+local int ziplocal_putValue OF((FILE *file, uLong x, int nbByte));
 local int ziplocal_putValue (file, x, nbByte)
     FILE *file;
     uLong x;
@@ -259,7 +261,7 @@ local int ziplocal_putValue (file, x, nbByte)
         return ZIP_OK;
 }
 
-
+local void ziplocal_putValue_inmemory OF((void* dest, uLong x, int nbByte));
 local void ziplocal_putValue_inmemory (dest, x, nbByte)
     void* dest;
     uLong x;
@@ -390,34 +392,34 @@ extern int ZEXPORT zipOpenNewFileInZip (file, filename, zipfi,
     zi->ci.pos_local_header = ftell(zi->filezip);
     zi->ci.size_centralheader = SIZECENTRALHEADER + size_filename + 
                                       size_extrafield_global + size_comment;
-    zi->ci.central_header = (char*)ALLOC(zi->ci.size_centralheader);
+    zi->ci.central_header = (char*)ALLOC((uInt)zi->ci.size_centralheader);
 
-    ziplocal_putValue_inmemory(zi->ci.central_header,CENTRALHEADERMAGIC,4);
+    ziplocal_putValue_inmemory(zi->ci.central_header,(uLong)CENTRALHEADERMAGIC,4);
     /* version info */
-    ziplocal_putValue_inmemory(zi->ci.central_header+4,VERSIONMADEBY,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+6,20,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+8,zi->ci.flag,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+10,zi->ci.method,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+12,zi->ci.dosDate,4);
-    ziplocal_putValue_inmemory(zi->ci.central_header+16,0,4); /*crc*/
-    ziplocal_putValue_inmemory(zi->ci.central_header+20,0,4); /*compr size*/
-    ziplocal_putValue_inmemory(zi->ci.central_header+24,0,4); /*uncompr size*/
-    ziplocal_putValue_inmemory(zi->ci.central_header+28,size_filename,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+30,size_extrafield_global,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+32,size_comment,2);
-    ziplocal_putValue_inmemory(zi->ci.central_header+34,0,2); /*disk nm start*/
+    ziplocal_putValue_inmemory(zi->ci.central_header+4,(uLong)VERSIONMADEBY,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+6,(uLong)20,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+8,(uLong)zi->ci.flag,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+10,(uLong)zi->ci.method,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+12,(uLong)zi->ci.dosDate,4);
+    ziplocal_putValue_inmemory(zi->ci.central_header+16,(uLong)0,4); /*crc*/
+    ziplocal_putValue_inmemory(zi->ci.central_header+20,(uLong)0,4); /*compr size*/
+    ziplocal_putValue_inmemory(zi->ci.central_header+24,(uLong)0,4); /*uncompr size*/
+    ziplocal_putValue_inmemory(zi->ci.central_header+28,(uLong)size_filename,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+30,(uLong)size_extrafield_global,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+32,(uLong)size_comment,2);
+    ziplocal_putValue_inmemory(zi->ci.central_header+34,(uLong)0,2); /*disk nm start*/
 
     if (zipfi==NULL)
-        ziplocal_putValue_inmemory(zi->ci.central_header+36,0,2); 
+        ziplocal_putValue_inmemory(zi->ci.central_header+36,(uLong)0,2); 
     else
-        ziplocal_putValue_inmemory(zi->ci.central_header+36,zipfi->internal_fa,2); 
+        ziplocal_putValue_inmemory(zi->ci.central_header+36,(uLong)zipfi->internal_fa,2); 
 
     if (zipfi==NULL)
-        ziplocal_putValue_inmemory(zi->ci.central_header+38,0,4); 
+        ziplocal_putValue_inmemory(zi->ci.central_header+38,(uLong)0,4); 
     else
-        ziplocal_putValue_inmemory(zi->ci.central_header+38,zipfi->external_fa,4);
+        ziplocal_putValue_inmemory(zi->ci.central_header+38,(uLong)zipfi->external_fa,4);
 
-    ziplocal_putValue_inmemory(zi->ci.central_header+42,zi->ci.pos_local_header,4);
+    ziplocal_putValue_inmemory(zi->ci.central_header+42,(uLong)zi->ci.pos_local_header,4);
 
     for (i=0;i<size_filename;i++)
         *(zi->ci.central_header+SIZECENTRALHEADER+i) = *(filename+i);
@@ -433,25 +435,25 @@ extern int ZEXPORT zipOpenNewFileInZip (file, filename, zipfi,
         return ZIP_INTERNALERROR;
 
     /* write the local header */
-    err = ziplocal_putValue(zi->filezip,LOCALHEADERMAGIC,4);
+    err = ziplocal_putValue(zi->filezip,(uLong)LOCALHEADERMAGIC,4);
 
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,20,2);/* version needed to extract */
+        err = ziplocal_putValue(zi->filezip,(uLong)20,2);/* version needed to extract */
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,zi->ci.flag,2);
+        err = ziplocal_putValue(zi->filezip,(uLong)zi->ci.flag,2);
 
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,zi->ci.method,2);
+        err = ziplocal_putValue(zi->filezip,(uLong)zi->ci.method,2);
 
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,zi->ci.dosDate,4);
+        err = ziplocal_putValue(zi->filezip,(uLong)zi->ci.dosDate,4);
 
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,0,4); /* crc 32, unknown */
+        err = ziplocal_putValue(zi->filezip,(uLong)0,4); /* crc 32, unknown */
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,0,4); /* compressed size, unknown */
+        err = ziplocal_putValue(zi->filezip,(uLong)0,4); /* compressed size, unknown */
     if (err==ZIP_OK)
-        err = ziplocal_putValue(zi->filezip,0,4); /* uncompressed size, unknown */
+        err = ziplocal_putValue(zi->filezip,(uLong)0,4); /* uncompressed size, unknown */
 
     if (err==ZIP_OK)
         err = ziplocal_putValue(zi->filezip,(uLong)size_filename,2);
@@ -481,7 +483,7 @@ extern int ZEXPORT zipOpenNewFileInZip (file, filename, zipfi,
         zi->ci.stream.opaque = (voidpf)0;
 
         err = deflateInit2(&zi->ci.stream, level,
-               Z_DEFLATED, -MAX_WBITS, /*DEF_MEM_LEVEL*/8, 0);
+               Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, 0);
 
         if (err==Z_OK)
             zi->ci.stream_initialised = 1;
@@ -528,7 +530,7 @@ extern int ZEXPORT zipWriteInFileInZip (file, buf, len)
         {
             uLong uTotalOutBefore = zi->ci.stream.total_out;
             err=deflate(&zi->ci.stream,  Z_NO_FLUSH);
-            zi->ci.pos_in_buffered_data += zi->ci.stream.total_out - uTotalOutBefore ;
+            zi->ci.pos_in_buffered_data += (uInt)(zi->ci.stream.total_out - uTotalOutBefore) ;
 
         }
         else
@@ -585,7 +587,7 @@ extern int ZEXPORT zipCloseFileInZip (file)
         }
         uTotalOutBefore = zi->ci.stream.total_out;
         err=deflate(&zi->ci.stream,  Z_FINISH);
-        zi->ci.pos_in_buffered_data += zi->ci.stream.total_out - uTotalOutBefore ;
+        zi->ci.pos_in_buffered_data += (uInt)(zi->ci.stream.total_out - uTotalOutBefore) ;
     }
 
     if (err==Z_STREAM_END)
@@ -602,11 +604,11 @@ extern int ZEXPORT zipCloseFileInZip (file)
         zi->ci.stream_initialised = 0;
     }
 
-    ziplocal_putValue_inmemory(zi->ci.central_header+16,zi->ci.crc32,4); /*crc*/
+    ziplocal_putValue_inmemory(zi->ci.central_header+16,(uLong)zi->ci.crc32,4); /*crc*/
     ziplocal_putValue_inmemory(zi->ci.central_header+20,
-                                zi->ci.stream.total_out,4); /*compr size*/
+                                (uLong)zi->ci.stream.total_out,4); /*compr size*/
     ziplocal_putValue_inmemory(zi->ci.central_header+24,
-                                zi->ci.stream.total_in,4); /*uncompr size*/
+                                (uLong)zi->ci.stream.total_in,4); /*uncompr size*/
 
     if (err==ZIP_OK)
         err = add_data_in_datablock(&zi->central_dir,zi->ci.central_header,
@@ -621,13 +623,13 @@ extern int ZEXPORT zipCloseFileInZip (file)
                     err = ZIP_ERRNO;
 
         if (err==ZIP_OK)
-            err = ziplocal_putValue(zi->filezip,zi->ci.crc32,4); /* crc 32, unknown */
+            err = ziplocal_putValue(zi->filezip,(uLong)zi->ci.crc32,4); /* crc 32, unknown */
 
         if (err==ZIP_OK) /* compressed size, unknown */
-            err = ziplocal_putValue(zi->filezip,zi->ci.stream.total_out,4); 
+            err = ziplocal_putValue(zi->filezip,(uLong)zi->ci.stream.total_out,4); 
 
         if (err==ZIP_OK) /* uncompressed size, unknown */
-            err = ziplocal_putValue(zi->filezip,zi->ci.stream.total_in,4);
+            err = ziplocal_putValue(zi->filezip,(uLong)zi->ci.stream.total_in,4);
 
             if (fseek(zi->filezip,
                   cur_pos_inzip,SEEK_SET)!=0)
@@ -682,26 +684,26 @@ extern int ZEXPORT zipClose (file, global_comment)
     free_datablock(zi->central_dir.first_block);
 
     if (err==ZIP_OK) /* Magic End */
-        err = ziplocal_putValue(zi->filezip,ENDHEADERMAGIC,4);
+        err = ziplocal_putValue(zi->filezip,(uLong)ENDHEADERMAGIC,4);
 
     if (err==ZIP_OK) /* number of this disk */
-        err = ziplocal_putValue(zi->filezip,0,2);
+        err = ziplocal_putValue(zi->filezip,(uLong)0,2);
 
     if (err==ZIP_OK) /* number of the disk with the start of the central directory */
-        err = ziplocal_putValue(zi->filezip,0,2);
+        err = ziplocal_putValue(zi->filezip,(uLong)0,2);
 
     if (err==ZIP_OK) /* total number of entries in the central dir on this disk */
-        err = ziplocal_putValue(zi->filezip,zi->number_entry,2);
+        err = ziplocal_putValue(zi->filezip,(uLong)zi->number_entry,2);
 
     if (err==ZIP_OK) /* total number of entries in the central dir */
-        err = ziplocal_putValue(zi->filezip,zi->number_entry,2);
+        err = ziplocal_putValue(zi->filezip,(uLong)zi->number_entry,2);
 
     if (err==ZIP_OK) /* size of the central directory */
-        err = ziplocal_putValue(zi->filezip,size_centraldir,4);
+        err = ziplocal_putValue(zi->filezip,(uLong)size_centraldir,4);
 
     if (err==ZIP_OK) /* offset of start of central directory with respect to the 
                                 starting disk number */
-        err = ziplocal_putValue(zi->filezip,centraldir_pos_inzip ,4);
+        err = ziplocal_putValue(zi->filezip,(uLong)centraldir_pos_inzip ,4);
 
     if (err==ZIP_OK) /* zipfile comment length */
         err = ziplocal_putValue(zi->filezip,(uLong)size_global_comment,2);
diff --git a/contrib/untgz/untgz.c b/contrib/untgz/untgz.c
index 6fa9a5d..4a431ff 100644
--- a/contrib/untgz/untgz.c
+++ b/contrib/untgz/untgz.c
@@ -9,7 +9,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#include <utime.h>
 #include <errno.h>
 #include <fcntl.h>
 #ifdef unix
@@ -21,6 +20,23 @@
 
 #include "zlib.h"
 
+#ifdef WIN32
+#  ifndef F_OK
+#    define F_OK (0)
+#  endif
+#  ifdef _MSC_VER
+#    define mkdir(dirname,mode) _mkdir(dirname)
+#    define strdup(str)         _strdup(str)
+#    define unlink(fn)          _unlink(fn)
+#    define access(path,mode)   _access(path,mode)
+#  else
+#    define mkdir(dirname,mode) _mkdir(dirname)
+#  endif
+#else
+#  include <utime.h>
+#endif
+
+
 /* Values used in typeflag field.  */
 
 #define REGTYPE  '0'            /* regular file */
@@ -83,7 +99,7 @@ char *prog;
 
 /* This will give a benign warning */
 
-static char *TGZprefix[] = { "\0", ".tgz", ".tar.gz", NULL };
+static char *TGZprefix[] = { "\0", ".tgz", ".tar.gz", ".tar", NULL };
 
 /* Return the real name of the TGZ archive */
 /* or NULL if it does not exist. */
@@ -272,14 +288,6 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
       if (len < 0)
         error (gzerror(in, &err));
       /*
-       * if we met the end of the tar
-       * or the end-of-tar block,
-       * we are done
-       */
-      if ((len == 0)  || (buffer.header.name[0]== 0))
-        break;
-      
-      /*
        * Always expect complete blocks to process
        * the tar information.
        */
@@ -291,6 +299,13 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
        */
       if (getheader == 1)
         {
+          /*
+           * if we met the end of the tar
+           * or the end-of-tar block,
+           * we are done
+           */
+          if ((len == 0)  || (buffer.header.name[0]== 0)) break;
+
           tartime = (time_t)getoct(buffer.header.mtime,12);
           strcpy(fname,buffer.header.name);
           
@@ -360,6 +375,34 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
               getheader = 1;
               if ((action == TGZ_EXTRACT) && (outfile != NULL))
                 {
+#ifdef WIN32
+                  HANDLE hFile;
+                  FILETIME ftm,ftLocal;
+                  SYSTEMTIME st;
+                  struct tm localt;
+ 
+                  fclose(outfile);
+
+                  localt = *localtime(&tartime);
+
+                  hFile = CreateFile(fname, GENERIC_READ | GENERIC_WRITE,
+                                     0, NULL, OPEN_EXISTING, 0, NULL);
+                  
+                  st.wYear = (WORD)localt.tm_year+1900;
+                  st.wMonth = (WORD)localt.tm_mon;
+                  st.wDayOfWeek = (WORD)localt.tm_wday;
+                  st.wDay = (WORD)localt.tm_mday;
+                  st.wHour = (WORD)localt.tm_hour;
+                  st.wMinute = (WORD)localt.tm_min;
+                  st.wSecond = (WORD)localt.tm_sec;
+                  st.wMilliseconds = 0;
+                  SystemTimeToFileTime(&st,&ftLocal);
+                  LocalFileTimeToFileTime(&ftLocal,&ftm);
+                  SetFileTime(hFile,&ftm,NULL,&ftm);
+                  CloseHandle(hFile);
+
+                  outfile = NULL;
+#else
                   struct utimbuf settime;
 
                   settime.actime = settime.modtime = tartime;
@@ -367,6 +410,7 @@ int tar (gzFile in,int action,int arg,int argc,char **argv)
                   fclose(outfile);
                   outfile = NULL;
                   utime(fname,&settime);
+#endif
                 }
             }
         }
diff --git a/contrib/visual-basic.txt b/contrib/visual-basic.txt
index 18aa084..10fb44b 100644
--- a/contrib/visual-basic.txt
+++ b/contrib/visual-basic.txt
@@ -1,5 +1,17 @@
+See below some functions declarations for Visual Basic.
+
+Frequently Asked Question:
+
+Q: Each time I use the compress function I get the -5 error (not enough
+   room in the output buffer).
+
+A: Make sure that the length of the compressed buffer is passed by
+   reference ("as any"), not by value ("as long"). Also check that
+   before the call of compress this length is equal to the total size of
+   the compressed buffer and not zero.
+
+
 From: "Jon Caruana" <jon-net@usa.net>
-To: "Jean-loup Gailly" <gzip@prep.ai.mit.edu>
 Subject: Re: How to port zlib declares to vb?
 Date: Mon, 28 Oct 1996 18:33:03 -0600
 
diff --git a/deflate.c b/deflate.c
index 490813f..25d5818 100644
--- a/deflate.c
+++ b/deflate.c
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.1.2 Copyright 1995-1998 Jean-loup Gailly ";
+   " deflate 1.1.3 Copyright 1995-1998 Jean-loup Gailly ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -608,11 +608,13 @@ int ZEXPORT deflateCopy (dest, source)
     deflate_state *ss;
     ushf *overlay;
 
-    ss = source->state;
 
-    if (source == Z_NULL || dest == Z_NULL || ss == Z_NULL) {
+    if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
         return Z_STREAM_ERROR;
     }
+
+    ss = source->state;
+
     *dest = *source;
 
     ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
diff --git a/deflate.h b/deflate.h
index 0483016..962676d 100644
--- a/deflate.h
+++ b/deflate.h
@@ -230,12 +230,12 @@ typedef struct internal_state {
 
     ulg opt_len;        /* bit length of current block with optimal trees */
     ulg static_len;     /* bit length of current block with static trees */
-    ulg compressed_len; /* total bit length of compressed file */
     uInt matches;       /* number of string matches in current block */
     int last_eob_len;   /* bit length of EOB code for last block */
 
 #ifdef DEBUG
-    ulg bits_sent;      /* bit length of the compressed data */
+    ulg compressed_len; /* total bit length of compressed file mod 2^32 */
+    ulg bits_sent;      /* bit length of compressed data sent mod 2^32 */
 #endif
 
     ush bi_buf;
@@ -268,7 +268,7 @@ typedef struct internal_state {
         /* in trees.c */
 void _tr_init         OF((deflate_state *s));
 int  _tr_tally        OF((deflate_state *s, unsigned dist, unsigned lc));
-ulg  _tr_flush_block  OF((deflate_state *s, charf *buf, ulg stored_len,
+void _tr_flush_block  OF((deflate_state *s, charf *buf, ulg stored_len,
                           int eof));
 void _tr_align        OF((deflate_state *s));
 void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
diff --git a/example.c b/example.c
index 073ce76..8307c84 100644
--- a/example.c
+++ b/example.c
@@ -15,6 +15,12 @@
    extern void exit  OF((int));
 #endif
 
+#if defined(VMS) || defined(RISCOS)
+#  define TESTFILE "foo-gz"
+#else
+#  define TESTFILE "foo.gz"
+#endif
+
 #define CHECK_ERR(err, msg) { \
     if (err != Z_OK) { \
         fprintf(stderr, "%s error: %d\n", msg, err); \
@@ -79,8 +85,8 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
  * Test read/write of .gz files
  */
 void test_gzio(out, in, uncompr, uncomprLen)
-    const char *out; /* output file */
-    const char *in;  /* input file */
+    const char *out; /* compressed output file */
+    const char *in;  /* compressed input file */
     Byte *uncompr;
     int  uncomprLen;
 {
@@ -528,8 +534,8 @@ int main(argc, argv)
     }
     test_compress(compr, comprLen, uncompr, uncomprLen);
 
-    test_gzio((argc > 1 ? argv[1] : "foo.gz"),
-              (argc > 2 ? argv[2] : "foo.gz"),
+    test_gzio((argc > 1 ? argv[1] : TESTFILE),
+              (argc > 2 ? argv[2] : TESTFILE),
               uncompr, (int)uncomprLen);
 
     test_deflate(compr, comprLen);
diff --git a/gzio.c b/gzio.c
index e29198a..f7c336a 100644
--- a/gzio.c
+++ b/gzio.c
@@ -414,10 +414,14 @@ int ZEXPORT gzread (file, buf, len)
             s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
             start = s->stream.next_out;
 
-            if (getLong(s) != s->crc || getLong(s) != s->stream.total_out) {
+            if (getLong(s) != s->crc) {
                 s->z_err = Z_DATA_ERROR;
             } else {
-                /* Check for concatenated .gz files: */
+                (void)getLong(s);
+                /* The uncompressed length returned by above getlong() may
+                 * be different from s->stream.total_out) in case of
+                 * concatenated .gz files. Check for such files:
+                 */
                 check_header(s);
                 if (s->z_err == Z_OK) {
                     uLong total_in = s->stream.total_in;
@@ -670,7 +674,7 @@ z_off_t ZEXPORT gzseek (file, offset, whence)
         return -1L;
 #else
         if (whence == SEEK_SET) {
-            offset -= s->stream.total_out;
+            offset -= s->stream.total_in;
         }
         if (offset < 0) return -1L;
 
@@ -745,6 +749,7 @@ int ZEXPORT gzrewind (file)
     s->z_eof = 0;
     s->stream.avail_in = 0;
     s->stream.next_in = s->inbuf;
+    s->crc = crc32(0L, Z_NULL, 0);
         
     if (s->startpos == 0) { /* not a compressed file */
         rewind(s->file);
@@ -793,7 +798,8 @@ local void putLong (file, x)
 }
 
 /* ===========================================================================
-   Reads a long in LSB order from the given gz_stream. Sets 
+   Reads a long in LSB order from the given gz_stream. Sets z_err in case
+   of error.
 */
 local uLong getLong (s)
     gz_stream *s;
diff --git a/infblock.c b/infblock.c
index f8940c7..f4920fa 100644
--- a/infblock.c
+++ b/infblock.c
@@ -345,13 +345,6 @@ int r;
         s->mode = TYPE;
         break;
       }
-      if (k > 7)              /* return unused byte, if any */
-      {
-        Assert(k < 16, "inflate_codes grabbed too many bytes")
-        k -= 8;
-        n++;
-        p--;                    /* can always return one */
-      }
       s->mode = DRY;
     case DRY:
       FLUSH
diff --git a/infcodes.c b/infcodes.c
index 1d3baa9..d4e5ee9 100644
--- a/infcodes.c
+++ b/infcodes.c
@@ -221,6 +221,13 @@ int r;
       c->mode = START;
       break;
     case WASH:          /* o: got eob, possibly more output */
+      if (k > 7)        /* return unused byte, if any */
+      {
+        Assert(k < 16, "inflate_codes grabbed too many bytes")
+        k -= 8;
+        n++;
+        p--;            /* can always return one */
+      }
       FLUSH
       if (s->read != s->write)
         LEAVE
diff --git a/inffixed.h b/inffixed.h
index 644ef6c..77f7e76 100644
--- a/inffixed.h
+++ b/inffixed.h
@@ -10,116 +10,142 @@
 local uInt fixed_bl = 9;
 local uInt fixed_bd = 5;
 local inflate_huft fixed_tl[] = {
-    {{96,7},256}, {{0,8},80}, {{0,8},16}, {{84,8},115}, {{82,7},31},
-    {{0,8},112}, {{0,8},48}, {{0,9},192}, {{80,7},10}, {{0,8},96},
-    {{0,8},32}, {{0,9},160}, {{0,8},0}, {{0,8},128}, {{0,8},64},
-    {{0,9},224}, {{80,7},6}, {{0,8},88}, {{0,8},24}, {{0,9},144},
-    {{83,7},59}, {{0,8},120}, {{0,8},56}, {{0,9},208}, {{81,7},17},
-    {{0,8},104}, {{0,8},40}, {{0,9},176}, {{0,8},8}, {{0,8},136},
-    {{0,8},72}, {{0,9},240}, {{80,7},4}, {{0,8},84}, {{0,8},20},
-    {{85,8},227}, {{83,7},43}, {{0,8},116}, {{0,8},52}, {{0,9},200},
-    {{81,7},13}, {{0,8},100}, {{0,8},36}, {{0,9},168}, {{0,8},4},
-    {{0,8},132}, {{0,8},68}, {{0,9},232}, {{80,7},8}, {{0,8},92},
-    {{0,8},28}, {{0,9},152}, {{84,7},83}, {{0,8},124}, {{0,8},60},
-    {{0,9},216}, {{82,7},23}, {{0,8},108}, {{0,8},44}, {{0,9},184},
-    {{0,8},12}, {{0,8},140}, {{0,8},76}, {{0,9},248}, {{80,7},3},
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+    {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255}
   };
 local inflate_huft fixed_td[] = {
-    {{80,5},1}, {{87,5},257}, {{83,5},17}, {{91,5},4097}, {{81,5},5},
-    {{89,5},1025}, {{85,5},65}, {{93,5},16385}, {{80,5},3}, {{88,5},513},
-    {{84,5},33}, {{92,5},8193}, {{82,5},9}, {{90,5},2049}, {{86,5},129},
-    {{192,5},24577}, {{80,5},2}, {{87,5},385}, {{83,5},25}, {{91,5},6145},
-    {{81,5},7}, {{89,5},1537}, {{85,5},97}, {{93,5},24577}, {{80,5},4},
-    {{88,5},769}, {{84,5},49}, {{92,5},12289}, {{82,5},13}, {{90,5},3073},
-    {{86,5},193}, {{192,5},24577}
+    {{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097},
+    {{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385},
+    {{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193},
+    {{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577},
+    {{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145},
+    {{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577},
+    {{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289},
+    {{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577}
   };
diff --git a/inftrees.c b/inftrees.c
index 6876ab5..ef1e0b6 100644
--- a/inftrees.c
+++ b/inftrees.c
@@ -11,7 +11,7 @@
 #endif
 
 const char inflate_copyright[] =
-   " inflate 1.1.2 Copyright 1995-1998 Mark Adler ";
+   " inflate 1.1.3 Copyright 1995-1998 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
diff --git a/maketree.c b/maketree.c
index 66dd828..949d786 100644
--- a/maketree.c
+++ b/maketree.c
@@ -24,36 +24,6 @@
 #define exop word.what.Exop
 #define bits word.what.Bits
 
-/* showtree is only used for debugging purposes */
-void showtree(uInt b, inflate_huft *t, int d)
-{
-  int i, e;
-  char p[2*d+1];
-
-  for (i = 0; i < 2*d; i++)
-    p[i] = ' ';
-  p[i] = 0;
-  printf("%s[%d]\n", p, 1<<b);
-  for (i = 0; i < (1<<b); i++)
-  {
-    e = t[i].exop;
-    if (e == 0)                 /* simple code */
-      printf("%s%d(%d): literal=%d\n", p, i, t[i].bits, t[i].base);
-    else if (e & 16)            /* length */
-      printf("%s%d(%d): length/distance=%d+(%d)\n",
-                p, i, t[i].bits, t[i].base, e & 15);
-    else if ((e & 64) == 0)     /* next table */
-    {
-      printf("%s%d(%d): *sub table*\n", p, i, t[i].bits);
-      showtree(e, t + t[i].base, d + 1);
-    }
-    else if (e & 32)            /* end of block */
-      printf("%s%d(%d): end of block\n", p, i, t[i].bits);
-    else                        /* bad code */
-      printf("%s%d: bad code\n", p, i);
-  }
-}
-
 /* generate initialization table for an inflate_huft structure array */
 void maketree(uInt b, inflate_huft *t)
 {
@@ -68,9 +38,9 @@ void maketree(uInt b, inflate_huft *t)
       fprintf(stderr, "maketree: cannot initialize sub-tables!\n");
       exit(1);
     }
-    if (i % 5 == 0)
+    if (i % 4 == 0)
       printf("\n   ");
-    printf(" {{%u,%u},%u}", t[i].exop, t[i].bits, t[i].base);
+    printf(" {{{%u,%u}},%u}", t[i].exop, t[i].bits, t[i].base);
     if (++i == (1<<b))
       break;
     putchar(',');
@@ -95,10 +65,6 @@ void main(void)
     fprintf(stderr, "inflate_trees_fixed error %d\n", r);
     return;
   }
-  /* puts("Literal/Length Tree:");
-     showtree(bl, tl, 1);
-     puts("Distance Tree:");
-     showtree(bd, td, 1); */
   puts("/* inffixed.h -- table for decoding fixed codes");
   puts(" * Generated automatically by the maketree.c program");
   puts(" */");
diff --git a/minigzip.c b/minigzip.c
index c05d0ea..7215eae 100644
--- a/minigzip.c
+++ b/minigzip.c
@@ -48,6 +48,9 @@
 #  define GZ_SUFFIX "-gz"
 #  define fileno(file) file->__file
 #endif
+#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+#  include <unix.h> /* for fileno */
+#endif
 
 #ifndef WIN32 /* unlink already in stdio.h for WIN32 */
   extern int unlink OF((const char *));
diff --git a/msdos/Makefile.b32 b/msdos/Makefile.b32
index fc3ac68..f476da9 100644
--- a/msdos/Makefile.b32
+++ b/msdos/Makefile.b32
@@ -33,13 +33,13 @@ OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
 
 all: test
 
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
+adler32.obj: adler32.c zlib.h zconf.h
         $(CC) -c $(CFLAGS) $*.c
 
 compress.obj: compress.c zlib.h zconf.h
         $(CC) -c $(CFLAGS) $*.c
 
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
+crc32.obj: crc32.c zlib.h zconf.h
         $(CC) -c $(CFLAGS) $*.c
 
 deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
diff --git a/msdos/Makefile.bor b/msdos/Makefile.bor
index 2116563..f5651b4 100644
--- a/msdos/Makefile.bor
+++ b/msdos/Makefile.bor
@@ -2,24 +2,40 @@
 # Borland C++   ************ UNTESTED ***********
 
 # To use, do "make -fmakefile.bor"
-# To compile in small model, set below: MODEL=-ms
+# To compile in small model, set below: MODEL=s
 
 # WARNING: the small model is supported but only for small values of
 # MAX_WBITS and MAX_MEM_LEVEL. For example:
 #    -DMAX_WBITS=11 -DDEF_WBITS=11 -DMAX_MEM_LEVEL=3
 # If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to CFLAGS below: 
+# objects plus a few K), you can add to the LOC macro below:
 #   -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
 # See zconf.h for details about the memory requirements.
 
 # ------------- Turbo C++, Borland C++ -------------
-MODEL=-ml
-CFLAGS=-O2 -Z $(MODEL)
+
+#    Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
+#    should be added to the environment via "set LOCAL_ZLIB=-DFOO" or added
+#    to the declaration of LOC here:
+LOC = $(LOCAL_ZLIB)
+
+# Type for CPU required: 0: 8086, 1: 80186, 2: 80286, 3: 80386, etc.
+CPU_TYP = 0
+
+# Memory model: one of s, m, c, l (small, medium, compact, large)
+MODEL=l
+
 CC=bcc
-LD=bcc
-LIB=tlib
 #   replace bcc with tcc for Turbo C++ 1.0, with bcc32 for the 32 bit version
-LDFLAGS=$(MODEL)
+LD=$(CC)
+AR=tlib
+
+# compiler flags
+CFLAGS=-O2 -Z -m$(MODEL) $(LOC)
+#   replace "-O2" by "-O -G -a -d" for Turbo C++ 1.0
+
+LDFLAGS=-m$(MODEL)
+
 O=.obj
 
 # variables
@@ -32,69 +48,73 @@ 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)
 
+ZLIB_H = zlib.h zconf.h
+ZUTIL_H = zutil.h $(ZLIB_H)
+
+ZLIB_LIB = zlib_$(MODEL).lib
+
 all: test
 
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
+# individual dependencies and action rules:
+adler32.obj: adler32.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-compress.obj: compress.c zlib.h zconf.h
+compress.obj: compress.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
+crc32.obj: crc32.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+deflate.obj: deflate.c deflate.h $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
+gzio.obj: gzio.c $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
-   infcodes.h infutil.h
+infblock.obj: infblock.c $(ZUTIL_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
+infcodes.obj: infcodes.c $(ZUTIL_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
+inflate.obj: inflate.c $(ZUTIL_H) infblock.h
         $(CC) -c $(CFLAGS) $*.c
 
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
         $(CC) -c $(CFLAGS) $*.c
 
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+infutil.obj: infutil.c $(ZUTIL_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
+inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
         $(CC) -c $(CFLAGS) $*.c
 
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+trees.obj: trees.c deflate.h $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-uncompr.obj: uncompr.c zlib.h zconf.h
+uncompr.obj: uncompr.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
+zutil.obj: zutil.c $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-example.obj: example.c zlib.h zconf.h
+example.obj: example.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-minigzip.obj: minigzip.c zlib.h zconf.h
+minigzip.obj: minigzip.c $(ZLIB_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)
+$(ZLIB_LIB): $(OBJ1) $(OBJ2)
+        del $(ZLIB_LIB)
+        $(AR) $(ZLIB_LIB) +$(OBJP1)
+        $(AR) $(ZLIB_LIB) +$(OBJP2)
 
-example.exe: example.obj zlib.lib
-        $(LD) $(LDFLAGS) example.obj zlib.lib
+example.exe: example.obj $(ZLIB_LIB)
+        $(LD) $(LDFLAGS) example.obj $(ZLIB_LIB)
 
-minigzip.exe: minigzip.obj zlib.lib
-        $(LD) $(LDFLAGS) minigzip.obj zlib.lib
+minigzip.exe: minigzip.obj $(ZLIB_LIB)
+        $(LD) $(LDFLAGS) minigzip.obj $(ZLIB_LIB)
 
 test: example.exe minigzip.exe
         example
diff --git a/msdos/Makefile.emx b/msdos/Makefile.emx
new file mode 100644
index 0000000..0e5e5cc
--- /dev/null
+++ b/msdos/Makefile.emx
@@ -0,0 +1,69 @@
+# Makefile for zlib.  Modified for emx 0.9c by Chr. Spieler, 6/17/98.
+# Copyright (C) 1995-1998 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.emx;  make test -fmakefile.emx
+# 
+
+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 available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f."  If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lzlib
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=zlib.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 $@
+
+zlib.a: $(OBJS)
+        $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+        $(LD) $@ $< $(LDLIBS)
+
+
+.PHONY : clean
+
+clean:
+        $(RM) *.d
+        $(RM) *.o
+        $(RM) *.exe
+        $(RM) zlib.a
+        $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
diff --git a/msdos/Makefile.msc b/msdos/Makefile.msc
index 1a6d663..562201d 100644
--- a/msdos/Makefile.msc
+++ b/msdos/Makefile.msc
@@ -2,20 +2,36 @@
 # Microsoft C 5.1 or later
 
 # To use, do "make makefile.msc"
-# To compile in small model, set below: MODEL=-AS
+# To compile in small model, set below: MODEL=S
 
 # If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to CFLAGS below: 
+# objects plus a few K), you can add to the LOC macro below:
 #   -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
 # See zconf.h for details about the memory requirements.
 
 # ------------- Microsoft C 5.1 and later -------------
-MODEL=-AL
-CFLAGS=-Oait -Gs -nologo -W3 $(MODEL)
-#-Ox generates bad code with MSC 5.1
+
+#    Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
+#    should be added to the environment via "set LOCAL_ZLIB=-DFOO" or added
+#    to the declaration of LOC here:
+LOC = $(LOCAL_ZLIB)
+
+# Type for CPU required: 0: 8086, 1: 80186, 2: 80286, 3: 80386, etc.
+CPU_TYP = 0
+
+# Memory model: one of S, M, C, L (small, medium, compact, large)
+MODEL=L
+
 CC=cl
+CFLAGS=-nologo -A$(MODEL) -G$(CPU_TYP) -W3 -Oait -Gs $(LOC)
+#-Ox generates bad code with MSC 5.1
+LIB_CFLAGS=-Zl $(CFLAGS)
+
 LD=link
-LDFLAGS=/e/st:0x1500/noe
+LDFLAGS=/noi/e/st:0x1500/noe/farcall/packcode
+# "/farcall/packcode" are only useful for `large code' memory models
+# but should be a "no-op" for small code models.
+
 O=.obj
 
 # variables
@@ -28,69 +44,73 @@ 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
+ZLIB_H = zlib.h zconf.h
+ZUTIL_H = zutil.h $(ZLIB_H)
 
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+ZLIB_LIB = zlib_$(MODEL).lib
 
-compress.obj: compress.c zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+all:  $(ZLIB_LIB) example.exe minigzip.exe
 
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+# individual dependencies and action rules:
+adler32.obj: adler32.c $(ZLIB_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+compress.obj: compress.c $(ZLIB_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+crc32.obj: crc32.c $(ZLIB_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
-   infcodes.h infutil.h
-        $(CC) -c $(CFLAGS) $*.c
+deflate.obj: deflate.c deflate.h $(ZUTIL_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
-   infcodes.h inffast.h
-        $(CC) -c $(CFLAGS) $*.c
+gzio.obj: gzio.c $(ZUTIL_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
-        $(CC) -c $(CFLAGS) $*.c
+infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
-        $(CC) -c $(CFLAGS) $*.c
+infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
-        $(CC) -c $(CFLAGS) $*.c
+inflate.obj: inflate.c $(ZUTIL_H) infblock.h
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-        $(CC) -c $(CFLAGS) $*.c
+inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-uncompr.obj: uncompr.c zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
-        $(CC) -c $(CFLAGS) $*.c
+trees.obj: trees.c deflate.h $(ZUTIL_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
+
+uncompr.obj: uncompr.c $(ZLIB_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
+
+zutil.obj: zutil.c $(ZUTIL_H)
+        $(CC) -c $(LIB_CFLAGS) $*.c
 
-example.obj: example.c zlib.h zconf.h
+example.obj: example.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-minigzip.obj: minigzip.c zlib.h zconf.h
+minigzip.obj: minigzip.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
 # we must cut the command line to fit in the MS/DOS 128 byte limit:
-zlib.lib: $(OBJ1) $(OBJ2)
-        if exist zlib.lib del zlib.lib
-        lib zlib $(OBJ1);
-        lib zlib $(OBJ2);
+$(ZLIB_LIB): $(OBJ1) $(OBJ2)
+        if exist $(ZLIB_LIB) del $(ZLIB_LIB)
+        lib $(ZLIB_LIB) $(OBJ1);
+        lib $(ZLIB_LIB) $(OBJ2);
 
-example.exe: example.obj zlib.lib
-        $(LD) $(LDFLAGS) example.obj,,,zlib.lib;
+example.exe: example.obj $(ZLIB_LIB)
+        $(LD) $(LDFLAGS) example.obj,,,$(ZLIB_LIB);
 
-minigzip.exe: minigzip.obj zlib.lib
-        $(LD) $(LDFLAGS) minigzip.obj,,,zlib.lib;
+minigzip.exe: minigzip.obj $(ZLIB_LIB)
+        $(LD) $(LDFLAGS) minigzip.obj,,,$(ZLIB_LIB);
 
 test: example.exe minigzip.exe
         example
diff --git a/msdos/Makefile.tc b/msdos/Makefile.tc
index a46ce73..63e0550 100644
--- a/msdos/Makefile.tc
+++ b/msdos/Makefile.tc
@@ -8,18 +8,18 @@
 # MAX_WBITS and MAX_MEM_LEVEL. For example:
 #    -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
 # If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to CFLAGS below: 
+# objects plus a few K), you can add to CFLAGS below:
 #   -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
 # See zconf.h for details about the memory requirements.
 
 # ------------- Turbo C 2.0 -------------
-MODEL=-ml
-# CFLAGS=-O2 -G -Z $(MODEL) -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
-CFLAGS=-O2 -G -Z $(MODEL)
+MODEL=l
+# CFLAGS=-O2 -G -Z -m$(MODEL) -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
+CFLAGS=-O2 -G -Z -m$(MODEL)
 CC=tcc -I\tc\include
 LD=tcc -L\tc\lib
-LIB=tlib
-LDFLAGS=$(MODEL) -f-
+AR=tlib
+LDFLAGS=-m$(MODEL) -f-
 O=.obj
 
 # variables
@@ -32,69 +32,72 @@ 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)
 
+ZLIB_H = zlib.h zconf.h
+ZUTIL_H = zutil.h $(ZLIB_H)
+
+ZLIB_LIB = zlib_$(MODEL).lib
+
 all: test
 
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
+adler32.obj: adler32.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-compress.obj: compress.c zlib.h zconf.h
+compress.obj: compress.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
+crc32.obj: crc32.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+deflate.obj: deflate.c deflate.h $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
+gzio.obj: gzio.c $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
-   infcodes.h infutil.h
+infblock.obj: infblock.c $(ZUTIL_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
+infcodes.obj: infcodes.c $(ZUTIL_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
+inflate.obj: inflate.c $(ZUTIL_H) infblock.h
         $(CC) -c $(CFLAGS) $*.c
 
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
         $(CC) -c $(CFLAGS) $*.c
 
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+infutil.obj: infutil.c $(ZUTIL_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
+inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
         $(CC) -c $(CFLAGS) $*.c
 
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+trees.obj: trees.c deflate.h $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-uncompr.obj: uncompr.c zlib.h zconf.h
+uncompr.obj: uncompr.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
+zutil.obj: zutil.c $(ZUTIL_H)
         $(CC) -c $(CFLAGS) $*.c
 
-example.obj: example.c zlib.h zconf.h
+example.obj: example.c $(ZLIB_H)
         $(CC) -c $(CFLAGS) $*.c
 
-minigzip.obj: minigzip.c zlib.h zconf.h
+minigzip.obj: minigzip.c $(ZLIB_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)
+$(ZLIB_LIB): $(OBJ1) $(OBJ2)
+        del $(ZLIB_LIB)
+        $(AR) $(ZLIB_LIB) +$(OBJP1)
+        $(AR) $(ZLIB_LIB) +$(OBJP2)
 
-example.exe: example.obj zlib.lib
-        $(LD) $(LDFLAGS) -eexample.exe example.obj zlib.lib
+example.exe: example.obj $(ZLIB_LIB)
+        $(LD) $(LDFLAGS) -eexample.exe example.obj $(ZLIB_LIB)
 
-minigzip.exe: minigzip.obj zlib.lib
-        $(LD) $(LDFLAGS) -eminigzip.exe minigzip.obj zlib.lib
+minigzip.exe: minigzip.obj $(ZLIB_LIB)
+        $(LD) $(LDFLAGS) -eminigzip.exe minigzip.obj $(ZLIB_LIB)
 
 test: example.exe minigzip.exe
         example
diff --git a/msdos/Makefile.w32 b/msdos/Makefile.w32
index d513c81..0a05fa9 100644
--- a/msdos/Makefile.w32
+++ b/msdos/Makefile.w32
@@ -28,13 +28,13 @@ OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
 
 all:  zlib.lib example.exe minigzip.exe
 
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
+adler32.obj: adler32.c zlib.h zconf.h
   $(CC) -c $(CFLAGS) $*.c
 
 compress.obj: compress.c zlib.h zconf.h
   $(CC) -c $(CFLAGS) $*.c
 
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
+crc32.obj: crc32.c zlib.h zconf.h
   $(CC) -c $(CFLAGS) $*.c
 
 deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
diff --git a/msdos/Makefile.wat b/msdos/Makefile.wat
index 2a3b629..44bf860 100644
--- a/msdos/Makefile.wat
+++ b/msdos/Makefile.wat
@@ -30,13 +30,13 @@ OBJP3=infutil$(O)+inffast$(O)
 
 all: test
 
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
+adler32.obj: adler32.c zlib.h zconf.h
         $(CC) $(CFLAGS) $*.c
 
 compress.obj: compress.c zlib.h zconf.h
         $(CC) $(CFLAGS) $*.c
 
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
+crc32.obj: crc32.c zlib.h zconf.h
         $(CC) $(CFLAGS) $*.c
 
 deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
diff --git a/msdos/zlib.def b/msdos/zlib.def
index e4edaad..6c04412 100644
--- a/msdos/zlib.def
+++ b/msdos/zlib.def
@@ -8,7 +8,7 @@ SUBSYSTEM	WINDOWS
 
 STUB            'WINSTUB.EXE'
 
-VERSION         1.11
+VERSION         1.13
 
 CODE             EXECUTE READ
 
diff --git a/msdos/zlib.rc b/msdos/zlib.rc
index 0a38186..556d4ff 100644
--- a/msdos/zlib.rc
+++ b/msdos/zlib.rc
@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1    VERSIONINFO     MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION    1,1,2,0
-  PRODUCTVERSION 1,1,2,0
+  FILEVERSION    1,1,3,0
+  PRODUCTVERSION 1,1,3,0
   FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
   FILEFLAGS     0
   FILEOS        VOS_DOS_WINDOWS32
@@ -17,7 +17,7 @@ BEGIN
 
     BEGIN
       VALUE "FileDescription", "zlib data compression library\0"
-      VALUE "FileVersion",      "1.1.2\0"
+      VALUE "FileVersion",      "1.1.3\0"
       VALUE "InternalName",     "zlib\0"
       VALUE "OriginalFilename", "zlib.dll\0"
       VALUE "ProductName",      "ZLib.DLL\0"
diff --git a/nt/Makefile.emx b/nt/Makefile.emx
new file mode 100644
index 0000000..2d475b1
--- /dev/null
+++ b/nt/Makefile.emx
@@ -0,0 +1,138 @@
+# Makefile for zlib.  Modified for emx/rsxnt by Chr. Spieler, 6/16/98.
+# Copyright (C) 1995-1998 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.emx;  make test -fmakefile.emx
+# 
+
+CC=gcc -Zwin32
+
+#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 available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f."  If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lzlib
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=zlib.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 $@
+
+zlib.a: $(OBJS)
+        $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+        $(LD) $@ $< $(LDLIBS)
+
+
+.PHONY : clean
+
+clean:
+        $(RM) *.d
+        $(RM) *.o
+        $(RM) *.exe
+        $(RM) zlib.a
+        $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
+# Makefile for zlib.  Modified for emx 0.9c by Chr. Spieler, 6/17/98.
+# Copyright (C) 1995-1998 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.emx;  make test -fmakefile.emx
+# 
+
+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 available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f."  If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lzlib
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=zlib.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 $@
+
+zlib.a: $(OBJS)
+        $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+        $(LD) $@ $< $(LDLIBS)
+
+
+.PHONY : clean
+
+clean:
+        $(RM) *.d
+        $(RM) *.o
+        $(RM) *.exe
+        $(RM) zlib.a
+        $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
diff --git a/nt/Makefile.gcc b/nt/Makefile.gcc
new file mode 100644
index 0000000..cdd652f
--- /dev/null
+++ b/nt/Makefile.gcc
@@ -0,0 +1,87 @@
+# Makefile for zlib.  Modified for mingw32 by C. Spieler, 6/16/98.
+# (This Makefile is directly derived from Makefile.dj2)
+# Copyright (C) 1995-1998 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.gcc;  make test -fmakefile.gcc
+# 
+# To install libz.a, zconf.h and zlib.h in the mingw32 directories, type:
+# 
+#    make install -fmakefile.gcc
+# 
+
+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 available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f."  If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lz
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+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)
+
+%.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)
+        $(INSTALL) zlib.h $(INCLUDE_PATH)
+        $(INSTALL) zconf.h $(INCLUDE_PATH)
+        $(INSTALL) libz.a $(LIBRARY_PATH)
+
+uninstall:
+        $(RM) $(INCLUDE_PATH)\zlib.h
+        $(RM) $(INCLUDE_PATH)\zconf.h
+        $(RM) $(LIBRARY_PATH)\libz.a
+
+clean:
+        $(RM) *.d
+        $(RM) *.o
+        $(RM) *.exe
+        $(RM) libz.a
+        $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
diff --git a/os2/Makefile.os2 b/os2/Makefile.os2
new file mode 100644
index 0000000..4f56947
--- /dev/null
+++ b/os2/Makefile.os2
@@ -0,0 +1,136 @@
+# Makefile for zlib under OS/2 using GCC (PGCC)
+# For conditions of distribution and use, see copyright notice in zlib.h 
+
+# To compile and test, type:
+#   cp Makefile.os2 ..
+#   cd ..
+#   make -f Makefile.os2 test
+
+# This makefile will build a static library z.lib, a shared library
+# z.dll and a import library zdll.lib. You can use either z.lib or
+# zdll.lib by specifying either -lz or -lzdll on gcc's command line
+
+CC=gcc -Zomf -s
+
+CFLAGS=-O6 -Wall
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-g -DDEBUG
+#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+#           -Wstrict-prototypes -Wmissing-prototypes
+
+#################### BUG WARNING: #####################
+## infcodes.c hits a bug in pgcc-1.0, so you have to use either
+## -O# where # <= 4 or one of (-fno-ommit-frame-pointer or -fno-force-mem)
+## This bug is reportedly fixed in pgcc >1.0, but this was not tested
+CFLAGS+=-fno-force-mem
+
+LDFLAGS=-s -L. -lzdll -Zcrtdll
+LDSHARED=$(CC) -s -Zomf -Zdll -Zcrtdll
+
+VER=1.1.0
+ZLIB=z.lib
+SHAREDLIB=z.dll
+SHAREDLIBIMP=zdll.lib
+LIBS=$(ZLIB) $(SHAREDLIB) $(SHAREDLIBIMP)
+
+AR=emxomfar cr
+IMPLIB=emximp
+RANLIB=echo
+TAR=tar
+SHELL=bash
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+       zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
+  algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+  nt/Makefile.nt nt/zlib.dnt  contrib/README.contrib contrib/*.txt \
+  contrib/asm386/*.asm contrib/asm386/*.c \
+  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
+  contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
+  contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32
+
+all: example.exe minigzip.exe
+
+test: all
+        @LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
+        echo hello world | ./minigzip | ./minigzip -d || \
+          echo '                *** minigzip test FAILED ***' ; \
+        if ./example; then \
+          echo '                *** zlib test OK ***'; \
+        else \
+          echo '                *** zlib test FAILED ***'; \
+        fi
+
+$(ZLIB): $(OBJS)
+        $(AR) $@ $(OBJS)
+        -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+$(SHAREDLIB): $(OBJS) os2/z.def
+        $(LDSHARED) -o $@ $^
+
+$(SHAREDLIBIMP): os2/z.def
+        $(IMPLIB) -o $@ $^
+
+example.exe: example.o $(LIBS)
+        $(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
+
+minigzip.exe: minigzip.o $(LIBS)
+        $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
+
+clean:
+        rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
+
+distclean:      clean
+
+zip:
+        mv Makefile Makefile~; cp -p Makefile.in Makefile
+        rm -f test.c ztest*.c
+        v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+        zip -ul9 zlib$$v $(DISTFILES)
+        mv Makefile~ Makefile
+
+dist:
+        mv Makefile Makefile~; cp -p Makefile.in Makefile
+        rm -f test.c ztest*.c
+        d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+        rm -f $$d.tar.gz; \
+        if test ! -d ../$$d; then rm -f ../$$d; ln -s `pwd` ../$$d; fi; \
+        files=""; \
+        for f in $(DISTFILES); do files="$$files $$d/$$f"; done; \
+        cd ..; \
+        GZIP=-9 $(TAR) chofz $$d/$$d.tar.gz $$files; \
+        if test ! -d $$d; then rm -f $$d; fi
+        mv Makefile~ Makefile
+
+tags:   
+        etags *.[ch]
+
+depend:
+        makedepend -- $(CFLAGS) -- *.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: 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: infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
+infcodes.o: zutil.h zlib.h zconf.h
+infcodes.o: inftrees.h infblock.h infcodes.h infutil.h inffast.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h
+inffast.o: infblock.h infcodes.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 infblock.h inftrees.h infcodes.h infutil.h
+minigzip.o:  zlib.h zconf.h 
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h  
diff --git a/os2/zlib.def b/os2/zlib.def
new file mode 100644
index 0000000..4c753f1
--- /dev/null
+++ b/os2/zlib.def
@@ -0,0 +1,51 @@
+;
+; Slightly modified version of ../nt/zlib.dnt :-)
+;
+
+LIBRARY         Z
+DESCRIPTION     "Zlib compression library for OS/2"
+CODE            PRELOAD MOVEABLE DISCARDABLE
+DATA            PRELOAD MOVEABLE MULTIPLE
+
+EXPORTS
+    adler32
+    compress
+    crc32
+    deflate
+    deflateCopy
+    deflateEnd
+    deflateInit2_
+    deflateInit_
+    deflateParams
+    deflateReset
+    deflateSetDictionary
+    gzclose
+    gzdopen
+    gzerror
+    gzflush
+    gzopen
+    gzread
+    gzwrite
+    inflate
+    inflateEnd
+    inflateInit2_
+    inflateInit_
+    inflateReset
+    inflateSetDictionary
+    inflateSync
+    uncompress
+    zlibVersion
+    gzprintf
+    gzputc
+    gzgetc
+    gzseek
+    gzrewind
+    gztell
+    gzeof
+    gzsetparams
+    zError
+    inflateSyncPoint
+    get_crc_table
+    compress2
+    gzputs
+    gzgets
diff --git a/trees.c b/trees.c
index ef31043..f01fb30 100644
--- a/trees.c
+++ b/trees.c
@@ -250,6 +250,13 @@ local void tr_static_init()
 
     if (static_init_done) return;
 
+    /* For some embedded targets, global variables are not initialized: */
+    static_l_desc.static_tree = static_ltree;
+    static_l_desc.extra_bits = extra_lbits;
+    static_d_desc.static_tree = static_dtree;
+    static_d_desc.extra_bits = extra_dbits;
+    static_bl_desc.extra_bits = extra_blbits;
+
     /* Initialize the mapping length (0..255) -> length code (0..28) */
     length = 0;
     for (code = 0; code < LENGTH_CODES-1; code++) {
@@ -378,8 +385,6 @@ void _tr_init(s)
 {
     tr_static_init();
 
-    s->compressed_len = 0L;
-
     s->l_desc.dyn_tree = s->dyn_ltree;
     s->l_desc.stat_desc = &static_l_desc;
 
@@ -393,6 +398,7 @@ void _tr_init(s)
     s->bi_valid = 0;
     s->last_eob_len = 8; /* enough lookahead for inflate */
 #ifdef DEBUG
+    s->compressed_len = 0L;
     s->bits_sent = 0L;
 #endif
 
@@ -865,9 +871,10 @@ void _tr_stored_block(s, buf, stored_len, eof)
     int eof;          /* true if this is the last block for a file */
 {
     send_bits(s, (STORED_BLOCK<<1)+eof, 3);  /* send block type */
+#ifdef DEBUG
     s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
     s->compressed_len += (stored_len + 4) << 3;
-
+#endif
     copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
 }
 
@@ -887,7 +894,9 @@ void _tr_align(s)
 {
     send_bits(s, STATIC_TREES<<1, 3);
     send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
     s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
+#endif
     bi_flush(s);
     /* Of the 10 bits for the empty block, we have already sent
      * (10 - bi_valid) bits. The lookahead for the last real code (before
@@ -897,7 +906,9 @@ void _tr_align(s)
     if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
         send_bits(s, STATIC_TREES<<1, 3);
         send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
         s->compressed_len += 10L;
+#endif
         bi_flush(s);
     }
     s->last_eob_len = 7;
@@ -905,10 +916,9 @@ void _tr_align(s)
 
 /* ===========================================================================
  * Determine the best encoding for the current block: dynamic trees, static
- * trees or store, and output the encoded block to the zip file. This function
- * returns the total compressed length for the file so far.
+ * trees or store, and output the encoded block to the zip file.
  */
-ulg _tr_flush_block(s, buf, stored_len, eof)
+void _tr_flush_block(s, buf, stored_len, eof)
     deflate_state *s;
     charf *buf;       /* input block, or NULL if too old */
     ulg stored_len;   /* length of input block */
@@ -955,25 +965,6 @@ ulg _tr_flush_block(s, buf, stored_len, eof)
         opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
     }
 
-    /* If compression failed and this is the first and last block,
-     * and if the .zip file can be seeked (to rewrite the local header),
-     * the whole file is transformed into a stored file:
-     */
-#ifdef STORED_FILE_OK
-#  ifdef FORCE_STORED_FILE
-    if (eof && s->compressed_len == 0L) { /* force stored file */
-#  else
-    if (stored_len <= opt_lenb && eof && s->compressed_len==0L && seekable()) {
-#  endif
-        /* Since LIT_BUFSIZE <= 2*WSIZE, the input data must be there: */
-        if (buf == (charf*)0) error ("block vanished");
-
-        copy_block(buf, (unsigned)stored_len, 0); /* without header */
-        s->compressed_len = stored_len << 3;
-        s->method = STORED;
-    } else
-#endif /* STORED_FILE_OK */
-
 #ifdef FORCE_STORED
     if (buf != (char*)0) { /* force stored block */
 #else
@@ -995,25 +986,32 @@ ulg _tr_flush_block(s, buf, stored_len, eof)
 #endif
         send_bits(s, (STATIC_TREES<<1)+eof, 3);
         compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
+#ifdef DEBUG
         s->compressed_len += 3 + s->static_len;
+#endif
     } else {
         send_bits(s, (DYN_TREES<<1)+eof, 3);
         send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
                        max_blindex+1);
         compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
+#ifdef DEBUG
         s->compressed_len += 3 + s->opt_len;
+#endif
     }
     Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+    /* The above check is made mod 2^32, for files larger than 512 MB
+     * and uLong implemented on 32 bits.
+     */
     init_block(s);
 
     if (eof) {
         bi_windup(s);
+#ifdef DEBUG
         s->compressed_len += 7;  /* align on byte boundary */
+#endif
     }
     Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
            s->compressed_len-7*eof));
-
-    return s->compressed_len >> 3;
 }
 
 /* ===========================================================================
diff --git a/zconf.h b/zconf.h
index 89e1a16..6d450fc 100644
--- a/zconf.h
+++ b/zconf.h
@@ -91,8 +91,8 @@
 #  define NO_DUMMY_DECL
 #endif
 
-/* Borland C incorrectly complains about missing returns: */
-#if defined(__BORLANDC__)
+/* Old Borland C incorrectly complains about missing returns: */
+#if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
 #  define NEED_DUMMY_RETURN
 #endif
 
@@ -148,7 +148,7 @@
    /* MSC small or medium model */
 #  define SMALL_MEDIUM
 #  ifdef _MSC_VER
-#    define FAR __far
+#    define FAR _far
 #  else
 #    define FAR far
 #  endif
@@ -156,42 +156,68 @@
 #if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
 #  ifndef __32BIT__
 #    define SMALL_MEDIUM
-#    define FAR __far
+#    define FAR _far
 #  endif
 #endif
 
 /* Compile with -DZLIB_DLL for Windows DLL support */
-#if (defined(_WINDOWS) || defined(WINDOWS)) && defined(ZLIB_DLL)
-#  ifdef FAR
-#    undef FAR
+#if defined(ZLIB_DLL)
+#  if defined(_WINDOWS) || defined(WINDOWS)
+#    ifdef FAR
+#      undef FAR
+#    endif
+#    include <windows.h>
+#    define ZEXPORT  WINAPI
+#    ifdef WIN32
+#      define ZEXPORTVA  WINAPIV
+#    else
+#      define ZEXPORTVA  FAR _cdecl _export
+#    endif
 #  endif
-#  include <windows.h>
-#  define ZEXPORT  WINAPI
-#  ifdef WIN32
-#    define ZEXPORTVA  WINAPIV
+#  if defined (__BORLANDC__)
+#    if (__BORLANDC__ >= 0x0500) && defined (WIN32)
+#      include <windows.h>
+#      define ZEXPORT __declspec(dllexport) WINAPI
+#      define ZEXPORTRVA __declspec(dllexport) WINAPIV
+#    else
+#      if defined (_Windows) && defined (__DLL__)
+#        define ZEXPORT _export
+#        define ZEXPORTVA _export
+#      endif
+#    endif
+#  endif
+#endif
+
+#if defined (__BEOS__)
+#  if defined (ZLIB_DLL)
+#    define ZEXTERN extern __declspec(dllexport)
 #  else
-#    define ZEXPORTVA  FAR _cdecl _export
+#    define ZEXTERN extern __declspec(dllimport)
 #  endif
-#else
-#   if defined (__BORLANDC__) && defined (_Windows) && defined (__DLL__)
-#       define ZEXPORT _export
-#       define ZEXPORTVA _export
-#   else
-#       define ZEXPORT
-#       define ZEXPORTVA
-#   endif
+#endif
+
+#ifndef ZEXPORT
+#  define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+#  define ZEXPORTVA
+#endif
+#ifndef ZEXTERN
+#  define ZEXTERN extern
 #endif
 
 #ifndef FAR
 #   define FAR
 #endif
 
+#if !defined(MACOS) && !defined(TARGET_OS_MAC)
 typedef unsigned char  Byte;  /* 8 bits */
+#endif
 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 */
+#ifdef SMALL_MEDIUM
+   /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
 #  define Bytef Byte FAR
 #else
    typedef Byte  FAR Bytef;
@@ -217,6 +243,7 @@ typedef uLong FAR uLongf;
 #ifndef SEEK_SET
 #  define SEEK_SET        0       /* Seek from beginning of file.  */
 #  define SEEK_CUR        1       /* Seek from current position.  */
+#  define SEEK_END        2       /* Set file pointer to EOF plus "offset" */
 #endif
 #ifndef z_off_t
 #  define  z_off_t long
diff --git a/zlib.3 b/zlib.3
index d08d0e0..25c8495 100644
--- a/zlib.3
+++ b/zlib.3
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "19 March 1998"
+.TH ZLIB 3 "9 July 1998"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -81,7 +81,7 @@ These documents are also available in other formats from:
 .IP
 ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 .SH AUTHORS
-Version 1.1.2
+Version 1.1.3
 Copyright (C) 1995-1998 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP
diff --git a/zlib.h b/zlib.h
index 787b5fd..49f56b4 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.1.2, March 19th, 1998
+  version 1.1.3, July 9th, 1998
 
   Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
 
@@ -37,7 +37,7 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.1.2"
+#define ZLIB_VERSION "1.1.3"
 
 /* 
      The 'zlib' compression library provides in-memory compression and
@@ -168,7 +168,7 @@ typedef z_stream FAR *z_streamp;
 
                         /* basic functions */
 
-extern const char * ZEXPORT zlibVersion OF((void));
+ZEXTERN const char * ZEXPORT zlibVersion OF((void));
 /* The application can compare zlibVersion and ZLIB_VERSION for consistency.
    If the first character differs, the library code actually used is
    not compatible with the zlib.h header file used by the application.
@@ -176,7 +176,7 @@ extern const char * ZEXPORT zlibVersion OF((void));
  */
 
 /* 
-extern int ZEXPORT deflateInit OF((z_streamp strm, int level));
+ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
 
      Initializes the internal stream state for compression. The fields
    zalloc, zfree and opaque must be initialized before by the caller.
@@ -198,7 +198,7 @@ extern int ZEXPORT deflateInit OF((z_streamp strm, int level));
 */
 
 
-extern int ZEXPORT deflate OF((z_streamp strm, int flush));
+ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
 /*
     deflate compresses as much data as possible, and stops when the input
   buffer becomes empty or the output buffer becomes full. It may introduce some
@@ -271,11 +271,12 @@ extern int ZEXPORT deflate OF((z_streamp strm, int flush));
   processed or more output produced), Z_STREAM_END if all input has been
   consumed and all output has been produced (only when flush is set to
   Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
-  if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible.
+  if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
+  (for example avail_in or avail_out was zero).
 */
 
 
-extern int ZEXPORT deflateEnd OF((z_streamp strm));
+ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
 /*
      All dynamically allocated data structures for this stream are freed.
    This function discards any unprocessed input and does not flush any
@@ -290,7 +291,7 @@ extern int ZEXPORT deflateEnd OF((z_streamp strm));
 
 
 /* 
-extern int ZEXPORT inflateInit OF((z_streamp strm));
+ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
 
      Initializes the internal stream state for decompression. The fields
    next_in, avail_in, zalloc, zfree and opaque must be initialized before by
@@ -310,7 +311,7 @@ extern int ZEXPORT inflateInit OF((z_streamp strm));
 */
 
 
-extern int ZEXPORT inflate OF((z_streamp strm, int flush));
+ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
 /*
     inflate decompresses as much data as possible, and stops when the input
   buffer becomes empty or the output buffer becomes full. It may some
@@ -379,7 +380,7 @@ extern int ZEXPORT inflate OF((z_streamp strm, int flush));
 */
 
 
-extern int ZEXPORT inflateEnd OF((z_streamp strm));
+ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
 /*
      All dynamically allocated data structures for this stream are freed.
    This function discards any unprocessed input and does not flush any
@@ -397,12 +398,12 @@ extern int ZEXPORT inflateEnd OF((z_streamp strm));
 */
 
 /*   
-extern int ZEXPORT deflateInit2 OF((z_streamp strm,
-                                    int  level,
-                                    int  method,
-                                    int  windowBits,
-                                    int  memLevel,
-                                    int  strategy));
+ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
+                                     int  level,
+                                     int  method,
+                                     int  windowBits,
+                                     int  memLevel,
+                                     int  strategy));
 
      This is another version of deflateInit with more compression options. The
    fields next_in, zalloc, zfree and opaque must be initialized before by
@@ -440,14 +441,14 @@ extern int ZEXPORT deflateInit2 OF((z_streamp strm,
    not perform any compression: this will be done by deflate().
 */
                             
-extern int ZEXPORT deflateSetDictionary OF((z_streamp strm,
-                                            const Bytef *dictionary,
-                                            uInt  dictLength));
+ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
+                                             const Bytef *dictionary,
+                                             uInt  dictLength));
 /*
      Initializes the compression dictionary from the given byte sequence
    without producing any compressed output. This function must be called
-   immediately after deflateInit or deflateInit2, before any call of
-   deflate. The compressor and decompressor must use exactly the same
+   immediately after deflateInit, deflateInit2 or deflateReset, before any
+   call of deflate. The compressor and decompressor must use exactly the same
    dictionary (see inflateSetDictionary).
 
      The dictionary should consist of strings (byte sequences) that are likely
@@ -476,8 +477,8 @@ extern int ZEXPORT deflateSetDictionary OF((z_streamp strm,
    perform any compression: this will be done by deflate().
 */
 
-extern int ZEXPORT deflateCopy OF((z_streamp dest,
-                                   z_streamp source));
+ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
+                                    z_streamp source));
 /*
      Sets the destination stream as a complete copy of the source stream.
 
@@ -494,7 +495,7 @@ extern int ZEXPORT deflateCopy OF((z_streamp dest,
    destination.
 */
 
-extern int ZEXPORT deflateReset OF((z_streamp strm));
+ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
 /*
      This function is equivalent to deflateEnd followed by deflateInit,
    but does not free and reallocate all the internal compression state.
@@ -505,7 +506,9 @@ extern int ZEXPORT deflateReset OF((z_streamp strm));
    stream state was inconsistent (such as zalloc or state being NULL).
 */
 
-extern int ZEXPORT deflateParams OF((z_streamp strm, int level, int strategy));
+ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
+                                      int level,
+                                      int strategy));
 /*
      Dynamically update the compression level and compression strategy.  The
    interpretation of level and strategy is as in deflateInit2.  This can be
@@ -525,8 +528,8 @@ extern int ZEXPORT deflateParams OF((z_streamp strm, int level, int strategy));
 */
 
 /*   
-extern int ZEXPORT inflateInit2 OF((z_streamp strm,
-                                    int  windowBits));
+ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
+                                     int  windowBits));
 
      This is another version of inflateInit with an extra parameter. The
    fields next_in, avail_in, zalloc, zfree and opaque must be initialized
@@ -547,9 +550,9 @@ extern int ZEXPORT inflateInit2 OF((z_streamp strm,
    modified, but next_out and avail_out are unchanged.)
 */
 
-extern int ZEXPORT inflateSetDictionary OF((z_streamp strm,
-                                            const Bytef *dictionary,
-                                            uInt  dictLength));
+ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
+                                             const Bytef *dictionary,
+                                             uInt  dictLength));
 /*
      Initializes the decompression dictionary from the given uncompressed byte
    sequence. This function must be called immediately after a call of inflate
@@ -566,7 +569,7 @@ extern int ZEXPORT inflateSetDictionary OF((z_streamp strm,
    inflate().
 */
 
-extern int ZEXPORT inflateSync OF((z_streamp strm));
+ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
 /* 
     Skips invalid compressed data until a full flush point (see above the
   description of deflate with Z_FULL_FLUSH) can be found, or until all
@@ -581,7 +584,7 @@ extern int ZEXPORT inflateSync OF((z_streamp strm));
   until success or end of the input data.
 */
 
-extern int ZEXPORT inflateReset OF((z_streamp strm));
+ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
 /*
      This function is equivalent to inflateEnd followed by inflateInit,
    but does not free and reallocate all the internal decompression state.
@@ -602,8 +605,8 @@ extern int ZEXPORT inflateReset OF((z_streamp strm));
    utility functions can easily be modified if you need special options.
 */
 
-extern int ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
-                                const Bytef *source, uLong sourceLen));
+ZEXTERN int ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
+                                 const Bytef *source, uLong sourceLen));
 /*
      Compresses the source buffer into the destination buffer.  sourceLen is
    the byte length of the source buffer. Upon entry, destLen is the total
@@ -617,9 +620,9 @@ extern int ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
    buffer.
 */
 
-extern int ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
-                                 const Bytef *source, uLong sourceLen,
-                                 int level));
+ZEXTERN int ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
+                                  const Bytef *source, uLong sourceLen,
+                                  int level));
 /*
      Compresses the source buffer into the destination buffer. The level
    parameter has the same meaning as in deflateInit.  sourceLen is the byte
@@ -632,8 +635,8 @@ extern int ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
    Z_STREAM_ERROR if the level parameter is invalid.
 */
 
-extern int ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
-                                  const Bytef *source, uLong sourceLen));
+ZEXTERN int ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
+                                   const Bytef *source, uLong sourceLen));
 /*
      Decompresses the source buffer into the destination buffer.  sourceLen is
    the byte length of the source buffer. Upon entry, destLen is the total
@@ -653,7 +656,7 @@ extern int ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
 
 typedef voidp gzFile;
 
-extern gzFile ZEXPORT gzopen  OF((const char *path, const char *mode));
+ZEXTERN gzFile ZEXPORT gzopen  OF((const char *path, const char *mode));
 /*
      Opens a gzip (.gz) file for reading or writing. The mode parameter
    is as in fopen ("rb" or "wb") but can also include a compression level
@@ -669,7 +672,7 @@ extern gzFile ZEXPORT gzopen  OF((const char *path, const char *mode));
    can be checked to distinguish the two cases (if errno is zero, the
    zlib error is Z_MEM_ERROR).  */
 
-extern gzFile ZEXPORT gzdopen  OF((int fd, const char *mode));
+ZEXTERN gzFile ZEXPORT gzdopen  OF((int fd, const char *mode));
 /*
      gzdopen() associates a gzFile with the file descriptor fd.  File
    descriptors are obtained from calls like open, dup, creat, pipe or
@@ -682,7 +685,7 @@ extern gzFile ZEXPORT gzdopen  OF((int fd, const char *mode));
    the (de)compression state.
 */
 
-extern int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
+ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
 /*
      Dynamically update the compression level or strategy. See the description
    of deflateInit2 for the meaning of these parameters.
@@ -690,7 +693,7 @@ extern int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
    opened for writing.
 */
 
-extern int ZEXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
+ZEXTERN int ZEXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
 /*
      Reads the given number of uncompressed bytes from the compressed file.
    If the input file was not in gzip format, gzread copies the given number
@@ -698,28 +701,29 @@ extern int ZEXPORT    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 ZEXPORT    gzwrite OF((gzFile file, const voidp buf, unsigned len));
+ZEXTERN int ZEXPORT    gzwrite OF((gzFile file, 
+                                   const voidp buf, unsigned len));
 /*
      Writes the given number of uncompressed bytes into the compressed file.
    gzwrite returns the number of uncompressed bytes actually written
    (0 in case of error).
 */
 
-extern int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
+ZEXTERN int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
 /*
      Converts, formats, and writes the args to the compressed file under
    control of the format string, as in fprintf. gzprintf returns the number of
    uncompressed bytes actually written (0 in case of error).
 */
 
-extern int ZEXPORT gzputs OF((gzFile file, const char *s));
+ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
 /*
       Writes the given null-terminated string to the compressed file, excluding
    the terminating null character.
       gzputs returns the number of characters written, or -1 in case of error.
 */
 
-extern char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
+ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
 /*
       Reads bytes from the compressed file until len-1 characters are read, or
    a newline character is read and transferred to buf, or an end-of-file
@@ -728,19 +732,19 @@ extern char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
       gzgets returns buf, or Z_NULL in case of error.
 */
 
-extern int ZEXPORT    gzputc OF((gzFile file, int c));
+ZEXTERN int ZEXPORT    gzputc OF((gzFile file, int c));
 /*
       Writes c, converted to an unsigned char, into the compressed file.
    gzputc returns the value that was written, or -1 in case of error.
 */
 
-extern int ZEXPORT    gzgetc OF((gzFile file));
+ZEXTERN int ZEXPORT    gzgetc OF((gzFile file));
 /*
       Reads one byte from the compressed file. gzgetc returns this byte
    or -1 in case of end of file or error.
 */
 
-extern int ZEXPORT    gzflush OF((gzFile file, int flush));
+ZEXTERN int ZEXPORT    gzflush OF((gzFile file, int flush));
 /*
      Flushes all pending output into the compressed file. The parameter
    flush is as in the deflate() function. The return value is the zlib
@@ -750,10 +754,11 @@ extern int ZEXPORT    gzflush OF((gzFile file, int flush));
    degrade compression.
 */
 
-extern z_off_t ZEXPORT    gzseek OF((gzFile file, z_off_t offset, int whence));
+ZEXTERN z_off_t ZEXPORT    gzseek OF((gzFile file,
+                                      z_off_t offset, int whence));
 /* 
-      Sets the starting position for the next gzread or gzwrite on the given
-   compressed file. The offset represents a number of bytes in the
+      Sets the starting position for the next gzread or gzwrite on the
+   given compressed file. The offset represents a number of bytes in the
    uncompressed data stream. The whence parameter is defined as in lseek(2);
    the value SEEK_END is not supported.
      If the file is opened for reading, this function is emulated but can be
@@ -767,14 +772,14 @@ extern z_off_t ZEXPORT    gzseek OF((gzFile file, z_off_t offset, int whence));
    would be before the current position.
 */
 
-extern int ZEXPORT    gzrewind OF((gzFile file));
+ZEXTERN int ZEXPORT    gzrewind OF((gzFile file));
 /*
      Rewinds the given file. This function is supported only for reading.
 
    gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
 */
 
-extern z_off_t ZEXPORT    gztell OF((gzFile file));
+ZEXTERN z_off_t ZEXPORT    gztell OF((gzFile file));
 /*
      Returns the starting position for the next gzread or gzwrite on the
    given compressed file. This position represents a number of bytes in the
@@ -783,20 +788,20 @@ extern z_off_t ZEXPORT    gztell OF((gzFile file));
    gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
 */
 
-extern int ZEXPORT gzeof OF((gzFile file));
+ZEXTERN int ZEXPORT gzeof OF((gzFile file));
 /*
      Returns 1 when EOF has previously been detected reading the given
    input stream, otherwise zero.
 */
 
-extern int ZEXPORT    gzclose OF((gzFile file));
+ZEXTERN int ZEXPORT    gzclose OF((gzFile file));
 /*
      Flushes all pending output if necessary, closes the compressed file
    and deallocates all the (de)compression state. The return value is the zlib
    error number (see function gzerror below).
 */
 
-extern const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
+ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
 /*
      Returns the error message for the last error which occurred on the
    given compressed file. errnum is set to zlib error number. If an
@@ -813,7 +818,7 @@ extern const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
    compression library.
 */
 
-extern uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
+ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
 
 /*
      Update a running Adler-32 checksum with the bytes buf[0..len-1] and
@@ -830,7 +835,7 @@ extern uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
      if (adler != original_adler) error();
 */
 
-extern uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
+ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
 /*
      Update a running crc with the bytes buf[0..len-1] and return the updated
    crc. If buf is NULL, this function returns the required initial value
@@ -852,16 +857,16 @@ extern uLong ZEXPORT 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 ZEXPORT deflateInit_ OF((z_streamp strm, int level,
-                                    const char *version, int stream_size));
-extern int ZEXPORT inflateInit_ OF((z_streamp strm,
-                                    const char *version, int stream_size));
-extern int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
-                                     int windowBits, int memLevel,
-                                     int strategy, const char *version,
-                                     int stream_size));
-extern int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
+ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
                                      const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
+                                     const char *version, int stream_size));
+ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
+                                      int windowBits, int memLevel,
+                                      int strategy, const char *version,
+                                      int stream_size));
+ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
+                                      const char *version, int stream_size));
 #define deflateInit(strm, level) \
         deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
 #define inflateInit(strm) \
@@ -877,9 +882,9 @@ extern int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
     struct internal_state {int dummy;}; /* hack for buggy compilers */
 #endif
 
-extern const char   * ZEXPORT zError           OF((int err));
-extern int            ZEXPORT inflateSyncPoint OF((z_streamp z));
-extern const uLongf * ZEXPORT get_crc_table    OF((void));
+ZEXTERN const char   * ZEXPORT zError           OF((int err));
+ZEXTERN int            ZEXPORT inflateSyncPoint OF((z_streamp z));
+ZEXTERN const uLongf * ZEXPORT get_crc_table    OF((void));
 
 #ifdef __cplusplus
 }
diff --git a/zutil.c b/zutil.c
index 5a3fe6e..b3de4e8 100644
--- a/zutil.c
+++ b/zutil.c
@@ -60,7 +60,7 @@ const char * ZEXPORT zError(err)
 
 void zmemcpy(dest, source, len)
     Bytef* dest;
-    Bytef* source;
+    const Bytef* source;
     uInt  len;
 {
     if (len == 0) return;
@@ -70,8 +70,8 @@ void zmemcpy(dest, source, len)
 }
 
 int zmemcmp(s1, s2, len)
-    Bytef* s1;
-    Bytef* s2;
+    const Bytef* s1;
+    const Bytef* s2;
     uInt  len;
 {
     uInt j;
@@ -178,7 +178,7 @@ void  zcfree (voidpf opaque, voidpf ptr)
 
 #  define MY_ZCALLOC
 
-#if (!defined(_MSC_VER) || (_MSC_VER < 600))
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
 #  define _halloc  halloc
 #  define _hfree   hfree
 #endif
diff --git a/zutil.h b/zutil.h
index 5e403d1..6f2cb97 100644
--- a/zutil.h
+++ b/zutil.h
@@ -75,7 +75,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 
 #ifdef MSDOS
 #  define OS_CODE  0x00
-#  ifdef __TURBOC__
+#  if defined(__TURBOC__) || defined(__BORLANDC__)
 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
        /* Allow compilation with ANSI keywords only enabled */
        void _Cdecl farfree( void *block );
@@ -112,13 +112,12 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 
 #if defined(MACOS) || defined(TARGET_OS_MAC)
 #  define OS_CODE  0x07
-#  ifndef fdopen
-#    define fdopen(fd,mode) NULL /* No fdopen() */
-#  endif
-#endif
-#if defined(__MWERKS__) && !defined(fdopen)
-#  if __dest_os != __be_os && __dest_os != __win32_os
-#    define fdopen(fd,mode) NULL
+#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+#    include <unix.h> /* for fdopen */
+#  else
+#    ifndef fdopen
+#      define fdopen(fd,mode) NULL /* No fdopen() */
+#    endif
 #  endif
 #endif
 
@@ -134,7 +133,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #  define fdopen(fd,mode) NULL /* No fdopen() */
 #endif
 
-#if (defined(_MSC_VER) && (_MSC_VER >= 600))
+#if (defined(_MSC_VER) && (_MSC_VER > 600))
 #  define fdopen(fd,type)  _fdopen(fd,type)
 #endif
 
@@ -182,8 +181,8 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
 #    define zmemzero(dest, len) memset(dest, 0, len)
 #  endif
 #else
-   extern void zmemcpy  OF((Bytef* dest, Bytef* source, uInt len));
-   extern int  zmemcmp  OF((Bytef* s1,   Bytef* s2, uInt len));
+   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
+   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
    extern void zmemzero OF((Bytef* dest, uInt len));
 #endif