50 files changed, 3641 insertions, 495 deletions

diff --git a/ChangeLog b/ChangeLog
index 7f6869d..9c16de1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,66 @@
 
                 ChangeLog file for zlib
 
+Changes in 1.2.3.1 (16 August 2006)
+- Add watcom directory with OpenWatcom make files [Daniel]
+- Remove #undef of FAR in zconf.in.h for MVS [Fedtke]
+- Update make_vms.com [Zinser]
+- Use -fPIC for shared build in configure [Teredesai, Nicholson]
+- Use only major version number for libz.so on IRIX and OSF1 [Reinholdtsen]
+- Use fdopen() (not _fdopen()) for Interix in zutil.h [BŠck]
+- Add some FAQ entries about the contrib directory
+- Update the MVS question in the FAQ
+- Avoid extraneous reads after EOF in gzio.c [Brown]
+- Correct spelling of "successfully" in gzio.c [Randers-Pehrson]
+- Add comments to zlib.h about gzerror() usage [Brown]
+- Set extra flags in gzip header in gzopen() like deflate() does
+- Make configure options more compatible with double-dash conventions
+  [Weigelt]
+- Clean up compilation under Solaris SunStudio cc [Rowe, Reinholdtsen]
+- Fix uninstall target in Makefile.in [Truta]
+- Add pkgconfig support [Weigelt]
+- Use $(DESTDIR) macro in Makefile.in [Reinholdtsen, Weigelt]
+- Replace set_data_type() with a more accurate detect_data_type() in
+  trees.c, according to the txtvsbin.txt document [Truta]
+- Swap the order of #include <stdio.h> and #include "zlib.h" in
+  gzio.c, example.c and minigzip.c [Truta]
+- Shut up annoying VS2005 warnings about standard C deprecation [Rowe,
+  Truta] (where?)
+- Fix target "clean" from win32/Makefile.bor [Truta]
+- Create .pdb and .manifest files in win32/makefile.msc [Ziegler, Rowe]
+- Update zlib www home address in win32/DLL_FAQ.txt [Truta]
+- Update contrib/masmx86/inffas32.asm for VS2005 [Vollant, Van Wassenhove]
+- Enable browse info in the "Debug" and "ASM Debug" configurations in
+  the Visual C++ 6 project, and set (non-ASM) "Debug" as default [Truta]
+- Add pkgconfig support [Weigelt]
+- Add ZLIB_VER_MAJOR, ZLIB_VER_MINOR and ZLIB_VER_REVISION in zlib.h,
+  for use in win32/zlib1.rc [Polushin, Rowe, Truta]
+- Add a document that explains the new text detection scheme to
+  doc/txtvsbin.txt [Truta]
+- Add rfc1950.txt, rfc1951.txt and rfc1952.txt to doc/ [Truta]
+- Move algorithm.txt into doc/ [Truta]
+- Synchronize FAQ with website
+- Fix compressBound(), was low for some pathological cases [Fearnley]
+- Take into account wrapper variations in deflateBound()
+- Set examples/zpipe.c input and output to binary mode for Windows 
+- Update examples/zlib_how.html with new zpipe.c (also web site)
+- Fix some warnings in examples/gzlog.c and examples/zran.c (it seems
+  that gcc became pickier in 4.0)
+- Add zlib.map for Linux: "All symbols from zlib-1.1.4 remain
+  un-versioned, the patch adds versioning only for symbols introduced in
+  zlib-1.2.0 or later.  It also declares as local those symbols which are
+  not designed to be exported." [Levin]
+- Update Z_PREFIX list in zconf.in.h, add --zprefix option to configure
+- Do not initialize global static by default in trees.c, add a response
+  NO_INIT_GLOBAL_POINTERS to initialize them if needed [Marquess]
+- Don't use strerror() in gzio.c under WinCE [Yakimov]
+- Don't use errno.h in zutil.h under WinCE [Yakimov]
+- Move arguments for AR to its usage to allow replacing ar [Marot]
+- Add HAVE_VISIBILITY_PRAGMA in zconf.in.h for Mozilla [Randers-Pehrson]
+- Improve inflateInit() and inflateInit2() documentation
+- Fix structure size comment in inflate.h
+- Change configure help option from --h* to --help [Santos]
+
 Changes in 1.2.3 (18 July 2005)
 - Apply security vulnerability fixes to contrib/infback9 as well
 - Clean up some text files (carriage returns, trailing space)
diff --git a/FAQ b/FAQ
index 441d910..61e8e8a 100644
--- a/FAQ
+++ b/FAQ
@@ -77,7 +77,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
 
 11. Can zlib handle .zip archives?
 
-    Not by itself, no.  See the directory contrib/minizip in the zlib
+    Not by itself, no. See the directory contrib/minizip in the zlib
     distribution.
 
 12. Can zlib handle .Z files?
@@ -217,10 +217,14 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
 
 29. Does zlib work on MVS, OS/390, CICS, etc.?
 
-    We don't know for sure. We have heard occasional reports of success on
-    these systems. If you do use it on one of these, please provide us with
-    a report, instructions, and patches that we can reference when we get
-    these questions. Thanks.
+    Yes, there are working ports of zlib 1.1.4 to MVS which you can find
+    here:
+
+    http://www.homerow.net/asm/zlib390.htm
+    http://www.homerow.net/asm/zlibLE.htm
+
+    If these are updated to more recent versions of zlib, please let us
+    know. Thanks.
 
 30. Is there some simpler, easier to read version of inflate I can look at
     to understand the deflate format?
@@ -271,7 +275,9 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
         http://www.ijs.si/software/snprintf/
 
     Note that you should be using the most recent version of zlib. Versions
-    1.1.3 and before were subject to a double-free vulnerability.
+    1.1.3 and before were subject to a double-free vulnerability, and version
+    1.2.1 was subject to an access exception when decompressing invalid
+    compressed data.
 
 34. Is there a Java version of zlib?
 
@@ -292,8 +298,8 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
     performing a conditional jump that depends on an uninitialized value.
     Isn't that a bug?
 
-    No.  That is intentional for performance reasons, and the output of
-    deflate is not affected.  This only started showing up recently since
+    No. That is intentional for performance reasons, and the output of
+    deflate is not affected. This only started showing up recently since
     zlib 1.2.x uses malloc() by default for allocations, whereas earlier
     versions used calloc(), which zeros out the allocated memory.
 
@@ -333,7 +339,23 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
     In any case, the compression improvements are so modest compared to other
     more modern approaches, that it's not worth the effort to implement.
 
-41. Can you please sign these lengthy legal documents and fax them back to us
+41. I'm having a problem with the zip functions in zlib, can you help?
+
+    There are no zip functions in zlib. You are probably using minizip by
+    Giles Vollant, which is found in the contrib directory of zlib. It is not
+    part of zlib. In fact none of the stuff in contrib is part of zlib. The
+    files in there are not supported by the zlib authors. You need to contact
+    the authors of the contribution for help.
+
+42. The match.asm code in contrib is under the GNU General Public License.
+    Since it's part of zlib, doesn't that mean that all of zlib falls under the
+    GNU GPL?
+
+    No. The files in contrib are not part of zlib. They were contributed by
+    other authors and are provided as a convenience to the user within the zlib
+    distribution. Each of the items in contrib have their own license.
+
+43. Can you please sign these lengthy legal documents and fax them back to us
     so that we can use your software in our product?
 
     No. Go away. Shoo.
diff --git a/INDEX b/INDEX
index 0587e59..a2e954b 100644
--- a/INDEX
+++ b/INDEX
@@ -4,20 +4,26 @@ INDEX           this file
 Makefile        makefile for Unix (generated by configure)
 Makefile.in     makefile for Unix (template for configure)
 README          guess what
-algorithm.txt   description of the (de)compression algorithm
 configure       configure script for Unix
+make_vms.com    makefile for VMS
 zconf.in.h      template for zconf.h (used by configure)
+zlib.3          Man page for zlib
+zlib.map        Linux symbol information
+zlib.pc.in      ??
 
 amiga/          makefiles for Amiga SAS C
 as400/          makefiles for IBM AS/400
+doc/            documentation for formats and algorithms
 msdos/          makefiles for MSDOS
 old/            makefiles for various architectures and zlib documentation
                 files that have not yet been updated for zlib 1.2.x
 projects/       projects for various Integrated Development Environments
 qnx/            makefiles for QNX
+todo/           works in progress
+watcom/         makefiles for OpenWatcom
 win32/          makefiles for Windows
 
-                zlib public header files (must be kept):
+                zlib public header files (required for library use):
 zconf.h
 zlib.h
 
@@ -46,6 +52,7 @@ zutil.h
                 source files for sample programs:
 example.c
 minigzip.c
+See examples/README.examples for more
 
                 unsupported contribution by third parties
 See contrib/README.contrib
diff --git a/Makefile b/Makefile
index 2fd6e45..460471b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-2005 Jean-loup Gailly.
+# Copyright (C) 1995-2006 Jean-loup Gailly.
 # For conditions of distribution and use, see copyright notice in zlib.h
 
 # To compile and test, type:
@@ -30,10 +30,10 @@ CPP=$(CC) -E
 
 LIBS=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.3
+SHAREDLIBV=libz.so.1.2.3.1
 SHAREDLIBM=libz.so.1
 
-AR=ar rc
+AR=ar
 RANLIB=ranlib
 TAR=tar
 SHELL=/bin/sh
@@ -45,6 +45,7 @@ libdir = ${exec_prefix}/lib
 includedir = ${prefix}/include
 mandir = ${prefix}/share/man
 man3dir = ${mandir}/man3
+pkgconfigdir = ${libdir}/pkgconfig
 
 OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
        zutil.o inflate.o infback.o inftrees.o inffast.o
@@ -90,33 +91,37 @@ minigzip$(EXE): minigzip.o $(LIBS)
         $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-        -@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
-        -@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
-        -@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
-        -@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
-        cp zlib.h zconf.h $(includedir)
-        chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
-        cp $(LIBS) $(libdir)
-        cd $(libdir); chmod 755 $(LIBS)
-        -@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
-        cd $(libdir); if test -f $(SHAREDLIBV); then \
+        -@if [ ! -d $(DESTDIR)$(exec_prefix)  ]; then mkdir -p $(DESTDIR)$(exec_prefix); fi
+        -@if [ ! -d $(DESTDIR)$(includedir)   ]; then mkdir -p $(DESTDIR)$(includedir); fi
+        -@if [ ! -d $(DESTDIR)$(libdir)       ]; then mkdir -p $(DESTDIR)$(libdir); fi
+        -@if [ ! -d $(DESTDIR)$(man3dir)      ]; then mkdir -p $(DESTDIR)$(man3dir); fi
+        -@if [ ! -d $(DESTDIR)$(pkgconfigdir) ]; then mkdir -p $(DESTDIR)$(pkgconfigdir); fi
+        cp zlib.h zconf.h $(DESTDIR)$(includedir)
+        chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+        cp $(LIBS) $(DESTDIR)$(libdir)
+        cd $(DESTDIR)$(libdir); chmod 755 $(LIBS)
+        -@(cd $(DESTDIR)$(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+        cd $(DESTDIR)$(libdir); if test -f $(SHAREDLIBV); then \
           rm -f $(SHAREDLIB) $(SHAREDLIBM); \
           ln -s $(SHAREDLIBV) $(SHAREDLIB); \
           ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
           (ldconfig || true)  >/dev/null 2>&1; \
         fi
-        cp zlib.3 $(man3dir)
-        chmod 644 $(man3dir)/zlib.3
+        cp zlib.3 $(DESTDIR)$(man3dir)
+        chmod 644 $(DESTDIR)$(man3dir)/zlib.3
+        cp zlib.pc $(DESTDIR)$(pkgconfigdir)
+        chmod 644 $(DESTDIR)$(pkgconfigdir)/zlib.pc
 # The ranlib in install is needed on NeXTSTEP which checks file times
 # ldconfig is for Linux
 
 uninstall:
-        cd $(includedir); \
-        cd $(libdir); rm -f libz.a; \
+        cd $(DESTDIR)$(includedir); rm -f zlib.h zconf.h
+        cd $(DESTDIR)$(libdir); rm -f libz.a; \
         if test -f $(SHAREDLIBV); then \
           rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
         fi
-        cd $(man3dir); rm -f zlib.3
+        cd $(DESTDIR)$(man3dir); rm -f zlib.3
+        cd $(DESTDIR)$(pkgconfigdir); rm -f zlib.pc
 
 mostlyclean: clean
 clean:
@@ -128,7 +133,7 @@ maintainer-clean: distclean
 distclean: clean
         cp -p Makefile.in Makefile
         cp -p zconf.in.h zconf.h
-        rm -f .DS_Store
+        rm -f zlib.pc .DS_Store
 
 tags:
         etags *.[ch]
diff --git a/Makefile.in b/Makefile.in
index 2fd6e45..460471b 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-2005 Jean-loup Gailly.
+# Copyright (C) 1995-2006 Jean-loup Gailly.
 # For conditions of distribution and use, see copyright notice in zlib.h
 
 # To compile and test, type:
@@ -30,10 +30,10 @@ CPP=$(CC) -E
 
 LIBS=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.3
+SHAREDLIBV=libz.so.1.2.3.1
 SHAREDLIBM=libz.so.1
 
-AR=ar rc
+AR=ar
 RANLIB=ranlib
 TAR=tar
 SHELL=/bin/sh
@@ -45,6 +45,7 @@ libdir = ${exec_prefix}/lib
 includedir = ${prefix}/include
 mandir = ${prefix}/share/man
 man3dir = ${mandir}/man3
+pkgconfigdir = ${libdir}/pkgconfig
 
 OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
        zutil.o inflate.o infback.o inftrees.o inffast.o
@@ -90,33 +91,37 @@ minigzip$(EXE): minigzip.o $(LIBS)
         $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-        -@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
-        -@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
-        -@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
-        -@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
-        cp zlib.h zconf.h $(includedir)
-        chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
-        cp $(LIBS) $(libdir)
-        cd $(libdir); chmod 755 $(LIBS)
-        -@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
-        cd $(libdir); if test -f $(SHAREDLIBV); then \
+        -@if [ ! -d $(DESTDIR)$(exec_prefix)  ]; then mkdir -p $(DESTDIR)$(exec_prefix); fi
+        -@if [ ! -d $(DESTDIR)$(includedir)   ]; then mkdir -p $(DESTDIR)$(includedir); fi
+        -@if [ ! -d $(DESTDIR)$(libdir)       ]; then mkdir -p $(DESTDIR)$(libdir); fi
+        -@if [ ! -d $(DESTDIR)$(man3dir)      ]; then mkdir -p $(DESTDIR)$(man3dir); fi
+        -@if [ ! -d $(DESTDIR)$(pkgconfigdir) ]; then mkdir -p $(DESTDIR)$(pkgconfigdir); fi
+        cp zlib.h zconf.h $(DESTDIR)$(includedir)
+        chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+        cp $(LIBS) $(DESTDIR)$(libdir)
+        cd $(DESTDIR)$(libdir); chmod 755 $(LIBS)
+        -@(cd $(DESTDIR)$(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+        cd $(DESTDIR)$(libdir); if test -f $(SHAREDLIBV); then \
           rm -f $(SHAREDLIB) $(SHAREDLIBM); \
           ln -s $(SHAREDLIBV) $(SHAREDLIB); \
           ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
           (ldconfig || true)  >/dev/null 2>&1; \
         fi
-        cp zlib.3 $(man3dir)
-        chmod 644 $(man3dir)/zlib.3
+        cp zlib.3 $(DESTDIR)$(man3dir)
+        chmod 644 $(DESTDIR)$(man3dir)/zlib.3
+        cp zlib.pc $(DESTDIR)$(pkgconfigdir)
+        chmod 644 $(DESTDIR)$(pkgconfigdir)/zlib.pc
 # The ranlib in install is needed on NeXTSTEP which checks file times
 # ldconfig is for Linux
 
 uninstall:
-        cd $(includedir); \
-        cd $(libdir); rm -f libz.a; \
+        cd $(DESTDIR)$(includedir); rm -f zlib.h zconf.h
+        cd $(DESTDIR)$(libdir); rm -f libz.a; \
         if test -f $(SHAREDLIBV); then \
           rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
         fi
-        cd $(man3dir); rm -f zlib.3
+        cd $(DESTDIR)$(man3dir); rm -f zlib.3
+        cd $(DESTDIR)$(pkgconfigdir); rm -f zlib.pc
 
 mostlyclean: clean
 clean:
@@ -128,7 +133,7 @@ maintainer-clean: distclean
 distclean: clean
         cp -p Makefile.in Makefile
         cp -p zconf.in.h zconf.h
-        rm -f .DS_Store
+        rm -f zlib.pc .DS_Store
 
 tags:
         etags *.[ch]
diff --git a/README b/README
index 758cc50..ce6f341 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY
 
-zlib 1.2.3 is a general purpose data compression library.  All the code is
+zlib 1.2.3.1 is a general purpose data compression library.  All the code is
 thread safe.  The data format used by the zlib library is described by RFCs
 (Request for Comments) 1950 to 1952 in the files
 http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
@@ -33,7 +33,7 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
 issue of  Dr. Dobb's Journal; a copy of the article is available in
 http://dogma.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.2.3 are documented in the file ChangeLog.
+The changes made in version 1.2.3.1 are documented in the file ChangeLog.
 
 Unsupported third party contributions are provided in directory "contrib".
 
diff --git a/as400/zlib.inc b/as400/zlib.inc
index 7bbfb7e..c782d73 100644
--- a/as400/zlib.inc
+++ b/as400/zlib.inc
@@ -1,7 +1,7 @@
       *  ZLIB.INC - Interface to the general purpose compression library
       *
       *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
-      *  Version 1.2.3
+      *  Version 1.2.3.1
       *
       *
       *  WARNING:
@@ -22,8 +22,8 @@
       *
       *  Versioning information.
       *
-     D ZLIB_VERSION    C                   '1.2.3'
-     D ZLIB_VERNUM     C                   X'1230'
+     D ZLIB_VERSION    C                   '1.2.3.1'
+     D ZLIB_VERNUM     C                   X'1231'
       *
       *  Other equates.
       *
diff --git a/compress.c b/compress.c
index df04f01..ea4dfbe 100644
--- a/compress.c
+++ b/compress.c
@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -75,5 +75,6 @@ int ZEXPORT compress (dest, destLen, source, sourceLen)
 uLong ZEXPORT compressBound (sourceLen)
     uLong sourceLen;
 {
-    return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
+    return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
+           (sourceLen >> 25) + 13;
 }
diff --git a/configure b/configure
index d7ffdc3..f1b769b 100755
--- a/configure
+++ b/configure
@@ -23,7 +23,8 @@ LDFLAGS="-L. ${LIBS}"
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
 VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
 VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
-AR=${AR-"ar rc"}
+AR=${AR-"ar"}
+AR_RC="${AR} rc"
 RANLIB=${RANLIB-"ranlib"}
 prefix=${prefix-/usr/local}
 exec_prefix=${exec_prefix-'${prefix}'}
@@ -32,6 +33,7 @@ includedir=${includedir-'${prefix}/include'}
 mandir=${mandir-'${prefix}/share/man'}
 shared_ext='.so'
 shared=0
+zprefix=0
 gcc=0
 old_cc="$CC"
 old_cflags="$CFLAGS"
@@ -39,20 +41,23 @@ old_cflags="$CFLAGS"
 while test $# -ge 1
 do
 case "$1" in
-    -h* | --h*)
+    -h* | --help)
       echo 'usage:'
       echo '  configure [--shared] [--prefix=PREFIX]  [--exec_prefix=EXPREFIX]'
-      echo '     [--libdir=LIBDIR] [--includedir=INCLUDEDIR]'
+      echo '     [--libdir=LIBDIR] [--includedir=INCLUDEDIR] [--zprefix]'
         exit 0;;
-    -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
-    -e*=* | --e*=*) exec_prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -p*=* | --prefix=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -e*=* | --eprefix=*) 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;;
+    -p* | --prefix) prefix="$2"; shift; shift;;
+    -e* | --eprefix) exec_prefix="$2"; shift; shift;;
+    -l* | --libdir) libdir="$2"; shift; shift;;
+    -i* | --includedir) includedir="$2"; shift; shift;;
+    -s* | --shared | --enable-shared) shared=1; shift;;
+    -z* | --zprefix) zprefix=1; shift;;
+    --sysconfdir=*) echo "ignored option: --sysconfdir"; shift;;
+    --localstatedir=*) echo "ignored option: --localstatedir"; shift;;
     *) echo "unknown option: $1"; echo "$0 --help for help"; exit 1;;
     esac
 done
@@ -73,10 +78,10 @@ esac
 
 if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
   CC="$cc"
-  SFLAGS=${CFLAGS-"-fPIC -O3"}
+  SFLAGS="${CFLAGS-"-O3"} -fPIC"
   CFLAGS="$cflags"
   case `(uname -s || echo unknown) 2>/dev/null` in
-  Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
+  Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"};;
   CYGWIN* | Cygwin* | cygwin* | OS/2* )
              EXE='.exe';;
   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
@@ -117,24 +122,30 @@ else
          esac;;
   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
              CFLAGS=${CFLAGS-"-ansi -O2"}
-             LDSHARED=${LDSHARED-"cc -shared"};;
+             LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"};;
   OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
              CFLAGS=${CFLAGS-"-O -std1"}
              LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;
   OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
              CFLAGS=${CFLAGS-"-O -std1"}
-             LDSHARED=${LDSHARED-"cc -shared"};;
+             LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"};;
   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
              CFLAGS=${CFLAGS-"-4 -O"}
              LDSHARED=${LDSHARED-"cc"}
              RANLIB=${RANLIB-"true"}
-             AR="cc -A";;
+             AR_RC="cc -A";;
   SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
              CFLAGS=${CFLAGS-"-O3"}
              LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;
-  SunOS\ 5*) SFLAGS=${CFLAGS-"-fast -xcg89 -KPIC -R."}
-             CFLAGS=${CFLAGS-"-fast -xcg89"}
-             LDSHARED=${LDSHARED-"cc -G"};;
+  SunOS\ 5*) LDSHARED=${LDSHARED-"cc -G"}
+         case `(uname -m || echo unknown) 2>/dev/null` in
+         i86*)
+             SFLAGS=${CFLAGS-"-xpentium -fast -KPIC -R."}
+             CFLAGS=${CFLAGS-"-xpentium -fast"};;
+         *)
+             SFLAGS=${CFLAGS-"-fast -xcg92 -KPIC -R."}
+             CFLAGS=${CFLAGS-"-fast -xcg92"};;
+         esac;;
   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
              CFLAGS=${CFLAGS-"-O2"}
              LDSHARED=${LDSHARED-"ld"};;
@@ -180,6 +191,10 @@ if test $shared -eq 1; then
     echo No shared library support.
     shared=0;
   else
+    echo Tested $CC -c $SFLAGS $test.c
+    $CC -c $SFLAGS $test.c
+    echo Tested $LDSHARED -o $test$shared_ext $test.o
+    $LDSHARED -o $test$shared_ext $test.o
     echo 'No shared library support; try without defining CC and CFLAGS'
     shared=0;
   fi
@@ -203,6 +218,12 @@ else
   echo "Checking for unistd.h... No."
 fi
 
+if test $zprefix -eq 1; then
+  sed < zconf.h "/#ifdef Z_PREFIX/s/def Z_PREFIX/ 1/" > zconf.temp.h
+  mv zconf.temp.h zconf.h
+  echo "Using z_ prefix on all symbols."
+fi
+
 cat > $test.c <<EOF
 #include <stdio.h>
 #include <stdarg.h>
@@ -219,7 +240,7 @@ int main()
 EOF
 
 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
-  echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()"
+  echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()."
 
   cat > $test.c <<EOF
 #include <stdio.h>
@@ -316,7 +337,7 @@ EOF
     fi
   fi
 else
-  echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()"
+  echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()."
 
   cat >$test.c <<EOF
 #include <stdio.h>
@@ -447,7 +468,7 @@ sed < Makefile.in "
 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
-/^AR *=/s#=.*#=$AR#
+/^AR *=/s#=.*#=$AR_RC#
 /^RANLIB *=/s#=.*#=$RANLIB#
 /^EXE *=/s#=.*#=$EXE#
 /^prefix *=/s#=.*#=$prefix#
@@ -457,3 +478,25 @@ sed < Makefile.in "
 /^mandir *=/s#=.*#=$mandir#
 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
 " > Makefile
+
+sed < zlib.pc.in "
+/^CC *=/s#=.*#=$CC#
+/^CFLAGS *=/s#=.*#=$CFLAGS#
+/^CPP *=/s#=.*#=$CPP#
+/^LDSHARED *=/s#=.*#=$LDSHARED#
+/^LIBS *=/s#=.*#=$LIBS#
+/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
+/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
+/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
+/^AR *=/s#=.*#=$AR_RC#
+/^RANLIB *=/s#=.*#=$RANLIB#
+/^EXE *=/s#=.*#=$EXE#
+/^prefix *=/s#=.*#=$prefix#
+/^exec_prefix *=/s#=.*#=$exec_prefix#
+/^libdir *=/s#=.*#=$libdir#
+/^includedir *=/s#=.*#=$includedir#
+/^mandir *=/s#=.*#=$mandir#
+/^LDFLAGS *=/s#=.*#=$LDFLAGS#
+" | sed -e "
+s/\@VERSION\@/$VER/g;
+" > zlib.pc
diff --git a/contrib/infback9/inftree9.c b/contrib/infback9/inftree9.c
index 0993f75..658f87f 100644
--- a/contrib/infback9/inftree9.c
+++ b/contrib/infback9/inftree9.c
@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate9_copyright[] =
-   " inflate9 1.2.3 Copyright 1995-2005 Mark Adler ";
+   " inflate9 1.2.3.1 Copyright 1995-2005 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
@@ -64,7 +64,7 @@ unsigned short FAR *work;
     static const unsigned short lext[31] = { /* Length codes 257..285 extra */
         128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
         130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
-        133, 133, 133, 133, 144, 201, 196};
+        133, 133, 133, 133, 144, 74, 196};
     static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
         1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
         65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,
diff --git a/contrib/masmx86/inffas32.asm b/contrib/masmx86/inffas32.asm
index 4a20512..05c46dd 100644
--- a/contrib/masmx86/inffas32.asm
+++ b/contrib/masmx86/inffas32.asm
@@ -644,9 +644,9 @@ L_init_mmx:
         movd mm0,ebp

         mov  ebp,ebx

 ; 896 "inffast.S"

-        movd mm4,[esp+0]

+        movd mm4,dword ptr [esp+0]

         movq mm3,mm4

-        movd mm5,[esp+4]

+        movd mm5,dword ptr [esp+4]

         movq mm2,mm5

         pxor mm1,mm1

         mov  ebx, [esp+8]

@@ -660,7 +660,7 @@ L_do_loop_mmx:
         ja  L_get_length_code_mmx

 

         movd mm6,ebp

-        movd mm7,[esi]

+        movd mm7,dword ptr [esi]

         add  esi,4

         psllq mm7,mm6

         add  ebp,32

@@ -717,7 +717,7 @@ L_decode_distance_mmx:
         ja L_get_dist_code_mmx

 

         movd mm6,ebp

-        movd mm7,[esi]

+        movd mm7,dword ptr [esi]

         add  esi,4

         psllq mm7,mm6

         add  ebp,32

diff --git a/contrib/vstudio/vc7/zlib.rc b/contrib/vstudio/vc7/zlib.rc
index 72cb8b4..c27d0fa 100644
--- a/contrib/vstudio/vc7/zlib.rc
+++ b/contrib/vstudio/vc7/zlib.rc
@@ -2,8 +2,8 @@
 

 #define IDR_VERSION1  1

 IDR_VERSION1    VERSIONINFO     MOVEABLE IMPURE LOADONCALL DISCARDABLE

-  FILEVERSION    1,2,3,0

-  PRODUCTVERSION 1,2,3,0

+  FILEVERSION    1,2,3,1

+  PRODUCTVERSION 1,2,3,1

   FILEFLAGSMASK VS_FFI_FILEFLAGSMASK

   FILEFLAGS     0

   FILEOS        VOS_DOS_WINDOWS32

@@ -17,7 +17,7 @@ BEGIN
 

     BEGIN

       VALUE "FileDescription", "zlib data compression library\0"

-      VALUE "FileVersion",      "1.2.3.0\0"

+      VALUE "FileVersion",      "1.2.3.1\0"

       VALUE "InternalName",     "zlib\0"

       VALUE "OriginalFilename", "zlib.dll\0"

       VALUE "ProductName",      "ZLib.DLL\0"

diff --git a/deflate.c b/deflate.c
index 29ce1f6..ccffede 100644
--- a/deflate.c
+++ b/deflate.c
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
+   " deflate 1.2.3.1 Copyright 1995-2005 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
@@ -481,33 +481,65 @@ int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
  * resulting from using fixed blocks instead of stored blocks, which deflate
  * can emit on compressed data for some combinations of the parameters.
  *
- * This function could be more sophisticated to provide closer upper bounds
- * for every combination of windowBits and memLevel, as well as wrap.
- * But even the conservative upper bound of about 14% expansion does not
- * seem onerous for output buffer allocation.
+ * This function could be more sophisticated to provide closer upper bounds for
+ * every combination of windowBits and memLevel.  But even the conservative
+ * upper bound of about 14% expansion does not seem onerous for output buffer
+ * allocation.
  */
 uLong ZEXPORT deflateBound(strm, sourceLen)
     z_streamp strm;
     uLong sourceLen;
 {
     deflate_state *s;
-    uLong destLen;
+    uLong complen, wraplen;
+    Bytef *str;
 
-    /* conservative upper bound */
-    destLen = sourceLen +
-              ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
+    /* conservative upper bound for compressed data */
+    complen = sourceLen +
+              ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5;
 
-    /* if can't get parameters, return conservative bound */
+    /* if can't get parameters, return conservative bound plus zlib wrapper */
     if (strm == Z_NULL || strm->state == Z_NULL)
-        return destLen;
+        return complen + 6;
 
-    /* if not default parameters, return conservative bound */
+    /* compute wrapper length */
     s = strm->state;
+    switch (s->wrap) {
+    case 0:                                 /* raw deflate */
+        wraplen = 0;
+        break;
+    case 1:                                 /* zlib wrapper */
+        wraplen = 6 + (s->strstart ? 4 : 0);
+        break;
+    case 2:                                 /* gzip wrapper */
+        wraplen = 18;
+        if (s->gzhead != NULL) {            /* user-supplied gzip header */
+            if (s->gzhead->extra != NULL)
+                wraplen += 2 + s->gzhead->extra_len;
+            str = s->gzhead->name;
+            if (str != NULL)
+                do {
+                    wraplen++;
+                } while (*str++);
+            str = s->gzhead->comment;
+            if (str != NULL)
+                do {
+                    wraplen++;
+                } while (*str++);
+            if (s->gzhead->hcrc)
+                wraplen += 2;
+        }
+        break;
+    default:                                /* for compiler happiness */
+        wraplen = 6;
+    }
+
+    /* if not default parameters, return conservative bound */
     if (s->w_bits != 15 || s->hash_bits != 8 + 7)
-        return destLen;
+        return complen + wraplen;
 
     /* default settings: return tight bound for that case */
-    return compressBound(sourceLen);
+    return compressBound(sourceLen) - 6 + wraplen;
 }
 
 /* =========================================================================
diff --git a/deflate.h b/deflate.h
index 05a5ab3..90077d8 100644
--- a/deflate.h
+++ b/deflate.h
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2004 Jean-loup Gailly
+ * Copyright (C) 1995-2005 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
diff --git a/algorithm.txt b/doc/algorithm.txt
index b022dde..b022dde 100644
--- a/algorithm.txt
+++ b/doc/algorithm.txt
diff --git a/doc/rfc1950.txt b/doc/rfc1950.txt
new file mode 100644
index 0000000..ce6428a
--- /dev/null
+++ b/doc/rfc1950.txt
@@ -0,0 +1,619 @@
+
+
+
+
+
+
+Network Working Group                                         P. Deutsch
+Request for Comments: 1950                           Aladdin Enterprises
+Category: Informational                                      J-L. Gailly
+                                                                Info-ZIP
+                                                                May 1996
+
+
+         ZLIB Compressed Data Format Specification version 3.3
+
+Status of This Memo
+
+   This memo provides information for the Internet community.  This memo
+   does not specify an Internet standard of any kind.  Distribution of
+   this memo is unlimited.
+
+IESG Note:
+
+   The IESG takes no position on the validity of any Intellectual
+   Property Rights statements contained in this document.
+
+Notices
+
+   Copyright (c) 1996 L. Peter Deutsch and Jean-Loup Gailly
+
+   Permission is granted to copy and distribute this document for any
+   purpose and without charge, including translations into other
+   languages and incorporation into compilations, provided that the
+   copyright notice and this notice are preserved, and that any
+   substantive changes or deletions from the original are clearly
+   marked.
+
+   A pointer to the latest version of this and related documentation in
+   HTML format can be found at the URL
+   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
+
+Abstract
+
+   This specification defines a lossless compressed data format.  The
+   data can be produced or consumed, even for an arbitrarily long
+   sequentially presented input data stream, using only an a priori
+   bounded amount of intermediate storage.  The format presently uses
+   the DEFLATE compression method but can be easily extended to use
+   other compression methods.  It can be implemented readily in a manner
+   not covered by patents.  This specification also defines the ADLER-32
+   checksum (an extension and improvement of the Fletcher checksum),
+   used for detection of data corruption, and provides an algorithm for
+   computing it.
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 1]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+Table of Contents
+
+   1. Introduction ................................................... 2
+      1.1. Purpose ................................................... 2
+      1.2. Intended audience ......................................... 3
+      1.3. Scope ..................................................... 3
+      1.4. Compliance ................................................ 3
+      1.5.  Definitions of terms and conventions used ................ 3
+      1.6. Changes from previous versions ............................ 3
+   2. Detailed specification ......................................... 3
+      2.1. Overall conventions ....................................... 3
+      2.2. Data format ............................................... 4
+      2.3. Compliance ................................................ 7
+   3. References ..................................................... 7
+   4. Source code .................................................... 8
+   5. Security Considerations ........................................ 8
+   6. Acknowledgements ............................................... 8
+   7. Authors' Addresses ............................................. 8
+   8. Appendix: Rationale ............................................ 9
+   9. Appendix: Sample code ..........................................10
+
+1. Introduction
+
+   1.1. Purpose
+
+      The purpose of this specification is to define a lossless
+      compressed data format that:
+
+          * Is independent of CPU type, operating system, file system,
+            and character set, and hence can be used for interchange;
+
+          * Can be produced or consumed, even for an arbitrarily long
+            sequentially presented input data stream, using only an a
+            priori bounded amount of intermediate storage, and hence can
+            be used in data communications or similar structures such as
+            Unix filters;
+
+          * Can use a number of different compression methods;
+
+          * Can be implemented readily in a manner not covered by
+            patents, and hence can be practiced freely.
+
+      The data format defined by this specification does not attempt to
+      allow random access to compressed data.
+
+
+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 2]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+   1.2. Intended audience
+
+      This specification is intended for use by implementors of software
+      to compress data into zlib format and/or decompress data from zlib
+      format.
+
+      The text of the specification assumes a basic background in
+      programming at the level of bits and other primitive data
+      representations.
+
+   1.3. Scope
+
+      The specification specifies a compressed data format that can be
+      used for in-memory compression of a sequence of arbitrary bytes.
+
+   1.4. Compliance
+
+      Unless otherwise indicated below, a compliant decompressor must be
+      able to accept and decompress any data set that conforms to all
+      the specifications presented here; a compliant compressor must
+      produce data sets that conform to all the specifications presented
+      here.
+
+   1.5.  Definitions of terms and conventions used
+
+      byte: 8 bits stored or transmitted as a unit (same as an octet).
+      (For this specification, a byte is exactly 8 bits, even on
+      machines which store a character on a number of bits different
+      from 8.) See below, for the numbering of bits within a byte.
+
+   1.6. Changes from previous versions
+
+      Version 3.1 was the first public release of this specification.
+      In version 3.2, some terminology was changed and the Adler-32
+      sample code was rewritten for clarity.  In version 3.3, the
+      support for a preset dictionary was introduced, and the
+      specification was converted to RFC style.
+
+2. Detailed specification
+
+   2.1. Overall conventions
+
+      In the diagrams below, a box like this:
+
+         +---+
+         |   | <-- the vertical bars might be missing
+         +---+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 3]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+      represents one byte; a box like this:
+
+         +==============+
+         |              |
+         +==============+
+
+      represents a variable number of bytes.
+
+      Bytes stored within a computer do not have a "bit order", since
+      they are always treated as a unit.  However, a byte considered as
+      an integer between 0 and 255 does have a most- and least-
+      significant bit, and since we write numbers with the most-
+      significant digit on the left, we also write bytes with the most-
+      significant bit on the left.  In the diagrams below, we number the
+      bits of a byte so that bit 0 is the least-significant bit, i.e.,
+      the bits are numbered:
+
+         +--------+
+         |76543210|
+         +--------+
+
+      Within a computer, a number may occupy multiple bytes.  All
+      multi-byte numbers in the format described here are stored with
+      the MOST-significant byte first (at the lower memory address).
+      For example, the decimal number 520 is stored as:
+
+             0     1
+         +--------+--------+
+         |00000010|00001000|
+         +--------+--------+
+          ^        ^
+          |        |
+          |        + less significant byte = 8
+          + more significant byte = 2 x 256
+
+   2.2. Data format
+
+      A zlib stream has the following structure:
+
+           0   1
+         +---+---+
+         |CMF|FLG|   (more-->)
+         +---+---+
+
+
+
+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 4]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+      (if FLG.FDICT set)
+
+           0   1   2   3
+         +---+---+---+---+
+         |     DICTID    |   (more-->)
+         +---+---+---+---+
+
+         +=====================+---+---+---+---+
+         |...compressed data...|    ADLER32    |
+         +=====================+---+---+---+---+
+
+      Any data which may appear after ADLER32 are not part of the zlib
+      stream.
+
+      CMF (Compression Method and flags)
+         This byte is divided into a 4-bit compression method and a 4-
+         bit information field depending on the compression method.
+
+            bits 0 to 3  CM     Compression method
+            bits 4 to 7  CINFO  Compression info
+
+      CM (Compression method)
+         This identifies the compression method used in the file. CM = 8
+         denotes the "deflate" compression method with a window size up
+         to 32K.  This is the method used by gzip and PNG (see
+         references [1] and [2] in Chapter 3, below, for the reference
+         documents).  CM = 15 is reserved.  It might be used in a future
+         version of this specification to indicate the presence of an
+         extra field before the compressed data.
+
+      CINFO (Compression info)
+         For CM = 8, CINFO is the base-2 logarithm of the LZ77 window
+         size, minus eight (CINFO=7 indicates a 32K window size). Values
+         of CINFO above 7 are not allowed in this version of the
+         specification.  CINFO is not defined in this specification for
+         CM not equal to 8.
+
+      FLG (FLaGs)
+         This flag byte is divided as follows:
+
+            bits 0 to 4  FCHECK  (check bits for CMF and FLG)
+            bit  5       FDICT   (preset dictionary)
+            bits 6 to 7  FLEVEL  (compression level)
+
+         The FCHECK value must be such that CMF and FLG, when viewed as
+         a 16-bit unsigned integer stored in MSB order (CMF*256 + FLG),
+         is a multiple of 31.
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 5]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+      FDICT (Preset dictionary)
+         If FDICT is set, a DICT dictionary identifier is present
+         immediately after the FLG byte. The dictionary is a sequence of
+         bytes which are initially fed to the compressor without
+         producing any compressed output. DICT is the Adler-32 checksum
+         of this sequence of bytes (see the definition of ADLER32
+         below).  The decompressor can use this identifier to determine
+         which dictionary has been used by the compressor.
+
+      FLEVEL (Compression level)
+         These flags are available for use by specific compression
+         methods.  The "deflate" method (CM = 8) sets these flags as
+         follows:
+
+            0 - compressor used fastest algorithm
+            1 - compressor used fast algorithm
+            2 - compressor used default algorithm
+            3 - compressor used maximum compression, slowest algorithm
+
+         The information in FLEVEL is not needed for decompression; it
+         is there to indicate if recompression might be worthwhile.
+
+      compressed data
+         For compression method 8, the compressed data is stored in the
+         deflate compressed data format as described in the document
+         "DEFLATE Compressed Data Format Specification" by L. Peter
+         Deutsch. (See reference [3] in Chapter 3, below)
+
+         Other compressed data formats are not specified in this version
+         of the zlib specification.
+
+      ADLER32 (Adler-32 checksum)
+         This contains a checksum value of the uncompressed data
+         (excluding any dictionary data) computed according to Adler-32
+         algorithm. This algorithm is a 32-bit extension and improvement
+         of the Fletcher algorithm, used in the ITU-T X.224 / ISO 8073
+         standard. See references [4] and [5] in Chapter 3, below)
+
+         Adler-32 is composed of two sums accumulated per byte: s1 is
+         the sum of all bytes, s2 is the sum of all s1 values. Both sums
+         are done modulo 65521. s1 is initialized to 1, s2 to zero.  The
+         Adler-32 checksum is stored as s2*65536 + s1 in most-
+         significant-byte first (network) order.
+
+
+
+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 6]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+   2.3. Compliance
+
+      A compliant compressor must produce streams with correct CMF, FLG
+      and ADLER32, but need not support preset dictionaries.  When the
+      zlib data format is used as part of another standard data format,
+      the compressor may use only preset dictionaries that are specified
+      by this other data format.  If this other format does not use the
+      preset dictionary feature, the compressor must not set the FDICT
+      flag.
+
+      A compliant decompressor must check CMF, FLG, and ADLER32, and
+      provide an error indication if any of these have incorrect values.
+      A compliant decompressor must give an error indication if CM is
+      not one of the values defined in this specification (only the
+      value 8 is permitted in this version), since another value could
+      indicate the presence of new features that would cause subsequent
+      data to be interpreted incorrectly.  A compliant decompressor must
+      give an error indication if FDICT is set and DICTID is not the
+      identifier of a known preset dictionary.  A decompressor may
+      ignore FLEVEL and still be compliant.  When the zlib data format
+      is being used as a part of another standard format, a compliant
+      decompressor must support all the preset dictionaries specified by
+      the other format. When the other format does not use the preset
+      dictionary feature, a compliant decompressor must reject any
+      stream in which the FDICT flag is set.
+
+3. References
+
+   [1] Deutsch, L.P.,"GZIP Compressed Data Format Specification",
+       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
+
+   [2] Thomas Boutell, "PNG (Portable Network Graphics) specification",
+       available in ftp://ftp.uu.net/graphics/png/documents/
+
+   [3] Deutsch, L.P.,"DEFLATE Compressed Data Format Specification",
+       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
+
+   [4] Fletcher, J. G., "An Arithmetic Checksum for Serial
+       Transmissions," IEEE Transactions on Communications, Vol. COM-30,
+       No. 1, January 1982, pp. 247-252.
+
+   [5] ITU-T Recommendation X.224, Annex D, "Checksum Algorithms,"
+       November, 1993, pp. 144, 145. (Available from
+       gopher://info.itu.ch). ITU-T X.244 is also the same as ISO 8073.
+
+
+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 7]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+4. Source code
+
+   Source code for a C language implementation of a "zlib" compliant
+   library is available at ftp://ftp.uu.net/pub/archiving/zip/zlib/.
+
+5. Security Considerations
+
+   A decoder that fails to check the ADLER32 checksum value may be
+   subject to undetected data corruption.
+
+6. Acknowledgements
+
+   Trademarks cited in this document are the property of their
+   respective owners.
+
+   Jean-Loup Gailly and Mark Adler designed the zlib format and wrote
+   the related software described in this specification.  Glenn
+   Randers-Pehrson converted this document to RFC and HTML format.
+
+7. Authors' Addresses
+
+   L. Peter Deutsch
+   Aladdin Enterprises
+   203 Santa Margarita Ave.
+   Menlo Park, CA 94025
+
+   Phone: (415) 322-0103 (AM only)
+   FAX:   (415) 322-1734
+   EMail: <ghost@aladdin.com>
+
+
+   Jean-Loup Gailly
+
+   EMail: <gzip@prep.ai.mit.edu>
+
+   Questions about the technical content of this specification can be
+   sent by email to
+
+   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
+   Mark Adler <madler@alumni.caltech.edu>
+
+   Editorial comments on this specification can be sent by email to
+
+   L. Peter Deutsch <ghost@aladdin.com> and
+   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
+
+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 8]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+8. Appendix: Rationale
+
+   8.1. Preset dictionaries
+
+      A preset dictionary is specially useful to compress short input
+      sequences. The compressor can take advantage of the dictionary
+      context to encode the input in a more compact manner. The
+      decompressor can be initialized with the appropriate context by
+      virtually decompressing a compressed version of the dictionary
+      without producing any output. However for certain compression
+      algorithms such as the deflate algorithm this operation can be
+      achieved without actually performing any decompression.
+
+      The compressor and the decompressor must use exactly the same
+      dictionary. The dictionary may be fixed or may be chosen among a
+      certain number of predefined dictionaries, according to the kind
+      of input data. The decompressor can determine which dictionary has
+      been chosen by the compressor by checking the dictionary
+      identifier. This document does not specify the contents of
+      predefined dictionaries, since the optimal dictionaries are
+      application specific. Standard data formats using this feature of
+      the zlib specification must precisely define the allowed
+      dictionaries.
+
+   8.2. The Adler-32 algorithm
+
+      The Adler-32 algorithm is much faster than the CRC32 algorithm yet
+      still provides an extremely low probability of undetected errors.
+
+      The modulo on unsigned long accumulators can be delayed for 5552
+      bytes, so the modulo operation time is negligible.  If the bytes
+      are a, b, c, the second sum is 3a + 2b + c + 3, and so is position
+      and order sensitive, unlike the first sum, which is just a
+      checksum.  That 65521 is prime is important to avoid a possible
+      large class of two-byte errors that leave the check unchanged.
+      (The Fletcher checksum uses 255, which is not prime and which also
+      makes the Fletcher check insensitive to single byte changes 0 <->
+      255.)
+
+      The sum s1 is initialized to 1 instead of zero to make the length
+      of the sequence part of s2, so that the length does not have to be
+      checked separately. (Any sequence of zeroes has a Fletcher
+      checksum of zero.)
+
+
+
+
+
+
+
+
+Deutsch & Gailly             Informational                      [Page 9]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+9. Appendix: Sample code
+
+   The following C code computes the Adler-32 checksum of a data buffer.
+   It is written for clarity, not for speed.  The sample code is in the
+   ANSI C programming language. Non C users may find it easier to read
+   with these hints:
+
+      &      Bitwise AND operator.
+      >>     Bitwise right shift operator. When applied to an
+             unsigned quantity, as here, right shift inserts zero bit(s)
+             at the left.
+      <<     Bitwise left shift operator. Left shift inserts zero
+             bit(s) at the right.
+      ++     "n++" increments the variable n.
+      %      modulo operator: a % b is the remainder of a divided by b.
+
+      #define BASE 65521 /* largest prime smaller than 65536 */
+
+      /*
+         Update a running Adler-32 checksum with the bytes buf[0..len-1]
+       and return the updated checksum. The Adler-32 checksum should be
+       initialized to 1.
+
+       Usage example:
+
+         unsigned long adler = 1L;
+
+         while (read_buffer(buffer, length) != EOF) {
+           adler = update_adler32(adler, buffer, length);
+         }
+         if (adler != original_adler) error();
+      */
+      unsigned long update_adler32(unsigned long adler,
+         unsigned char *buf, int len)
+      {
+        unsigned long s1 = adler & 0xffff;
+        unsigned long s2 = (adler >> 16) & 0xffff;
+        int n;
+
+        for (n = 0; n < len; n++) {
+          s1 = (s1 + buf[n]) % BASE;
+          s2 = (s2 + s1)     % BASE;
+        }
+        return (s2 << 16) + s1;
+      }
+
+      /* Return the adler32 of the bytes buf[0..len-1] */
+
+
+
+
+Deutsch & Gailly             Informational                     [Page 10]
+
+RFC 1950       ZLIB Compressed Data Format Specification        May 1996
+
+
+      unsigned long adler32(unsigned char *buf, int len)
+      {
+        return update_adler32(1L, buf, len);
+      }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Deutsch & Gailly             Informational                     [Page 11]
+
diff --git a/doc/rfc1951.txt b/doc/rfc1951.txt
new file mode 100644
index 0000000..403c8c7
--- /dev/null
+++ b/doc/rfc1951.txt
@@ -0,0 +1,955 @@
+
+
+
+
+
+
+Network Working Group                                         P. Deutsch
+Request for Comments: 1951                           Aladdin Enterprises
+Category: Informational                                         May 1996
+
+
+        DEFLATE Compressed Data Format Specification version 1.3
+
+Status of This Memo
+
+   This memo provides information for the Internet community.  This memo
+   does not specify an Internet standard of any kind.  Distribution of
+   this memo is unlimited.
+
+IESG Note:
+
+   The IESG takes no position on the validity of any Intellectual
+   Property Rights statements contained in this document.
+
+Notices
+
+   Copyright (c) 1996 L. Peter Deutsch
+
+   Permission is granted to copy and distribute this document for any
+   purpose and without charge, including translations into other
+   languages and incorporation into compilations, provided that the
+   copyright notice and this notice are preserved, and that any
+   substantive changes or deletions from the original are clearly
+   marked.
+
+   A pointer to the latest version of this and related documentation in
+   HTML format can be found at the URL
+   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
+
+Abstract
+
+   This specification defines a lossless compressed data format that
+   compresses data using a combination of the LZ77 algorithm and Huffman
+   coding, with efficiency comparable to the best currently available
+   general-purpose compression methods.  The data can be produced or
+   consumed, even for an arbitrarily long sequentially presented input
+   data stream, using only an a priori bounded amount of intermediate
+   storage.  The format can be implemented readily in a manner not
+   covered by patents.
+
+
+
+
+
+
+
+
+Deutsch                      Informational                      [Page 1]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+Table of Contents
+
+   1. Introduction ................................................... 2
+      1.1. Purpose ................................................... 2
+      1.2. Intended audience ......................................... 3
+      1.3. Scope ..................................................... 3
+      1.4. Compliance ................................................ 3
+      1.5.  Definitions of terms and conventions used ................ 3
+      1.6. Changes from previous versions ............................ 4
+   2. Compressed representation overview ............................. 4
+   3. Detailed specification ......................................... 5
+      3.1. Overall conventions ....................................... 5
+          3.1.1. Packing into bytes .................................. 5
+      3.2. Compressed block format ................................... 6
+          3.2.1. Synopsis of prefix and Huffman coding ............... 6
+          3.2.2. Use of Huffman coding in the "deflate" format ....... 7
+          3.2.3. Details of block format ............................. 9
+          3.2.4. Non-compressed blocks (BTYPE=00) ................... 11
+          3.2.5. Compressed blocks (length and distance codes) ...... 11
+          3.2.6. Compression with fixed Huffman codes (BTYPE=01) .... 12
+          3.2.7. Compression with dynamic Huffman codes (BTYPE=10) .. 13
+      3.3. Compliance ............................................... 14
+   4. Compression algorithm details ................................. 14
+   5. References .................................................... 16
+   6. Security Considerations ....................................... 16
+   7. Source code ................................................... 16
+   8. Acknowledgements .............................................. 16
+   9. Author's Address .............................................. 17
+
+1. Introduction
+
+   1.1. Purpose
+
+      The purpose of this specification is to define a lossless
+      compressed data format that:
+          * Is independent of CPU type, operating system, file system,
+            and character set, and hence can be used for interchange;
+          * Can be produced or consumed, even for an arbitrarily long
+            sequentially presented input data stream, using only an a
+            priori bounded amount of intermediate storage, and hence
+            can be used in data communications or similar structures
+            such as Unix filters;
+          * Compresses data with efficiency comparable to the best
+            currently available general-purpose compression methods,
+            and in particular considerably better than the "compress"
+            program;
+          * Can be implemented readily in a manner not covered by
+            patents, and hence can be practiced freely;
+
+
+
+Deutsch                      Informational                      [Page 2]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+          * Is compatible with the file format produced by the current
+            widely used gzip utility, in that conforming decompressors
+            will be able to read data produced by the existing gzip
+            compressor.
+
+      The data format defined by this specification does not attempt to:
+
+          * Allow random access to compressed data;
+          * Compress specialized data (e.g., raster graphics) as well
+            as the best currently available specialized algorithms.
+
+      A simple counting argument shows that no lossless compression
+      algorithm can compress every possible input data set.  For the
+      format defined here, the worst case expansion is 5 bytes per 32K-
+      byte block, i.e., a size increase of 0.015% for large data sets.
+      English text usually compresses by a factor of 2.5 to 3;
+      executable files usually compress somewhat less; graphical data
+      such as raster images may compress much more.
+
+   1.2. Intended audience
+
+      This specification is intended for use by implementors of software
+      to compress data into "deflate" format and/or decompress data from
+      "deflate" format.
+
+      The text of the specification assumes a basic background in
+      programming at the level of bits and other primitive data
+      representations.  Familiarity with the technique of Huffman coding
+      is helpful but not required.
+
+   1.3. Scope
+
+      The specification specifies a method for representing a sequence
+      of bytes as a (usually shorter) sequence of bits, and a method for
+      packing the latter bit sequence into bytes.
+
+   1.4. Compliance
+
+      Unless otherwise indicated below, a compliant decompressor must be
+      able to accept and decompress any data set that conforms to all
+      the specifications presented here; a compliant compressor must
+      produce data sets that conform to all the specifications presented
+      here.
+
+   1.5.  Definitions of terms and conventions used
+
+      Byte: 8 bits stored or transmitted as a unit (same as an octet).
+      For this specification, a byte is exactly 8 bits, even on machines
+
+
+
+Deutsch                      Informational                      [Page 3]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+      which store a character on a number of bits different from eight.
+      See below, for the numbering of bits within a byte.
+
+      String: a sequence of arbitrary bytes.
+
+   1.6. Changes from previous versions
+
+      There have been no technical changes to the deflate format since
+      version 1.1 of this specification.  In version 1.2, some
+      terminology was changed.  Version 1.3 is a conversion of the
+      specification to RFC style.
+
+2. Compressed representation overview
+
+   A compressed data set consists of a series of blocks, corresponding
+   to successive blocks of input data.  The block sizes are arbitrary,
+   except that non-compressible blocks are limited to 65,535 bytes.
+
+   Each block is compressed using a combination of the LZ77 algorithm
+   and Huffman coding. The Huffman trees for each block are independent
+   of those for previous or subsequent blocks; the LZ77 algorithm may
+   use a reference to a duplicated string occurring in a previous block,
+   up to 32K input bytes before.
+
+   Each block consists of two parts: a pair of Huffman code trees that
+   describe the representation of the compressed data part, and a
+   compressed data part.  (The Huffman trees themselves are compressed
+   using Huffman encoding.)  The compressed data consists of a series of
+   elements of two types: literal bytes (of strings that have not been
+   detected as duplicated within the previous 32K input bytes), and
+   pointers to duplicated strings, where a pointer is represented as a
+   pair <length, backward distance>.  The representation used in the
+   "deflate" format limits distances to 32K bytes and lengths to 258
+   bytes, but does not limit the size of a block, except for
+   uncompressible blocks, which are limited as noted above.
+
+   Each type of value (literals, distances, and lengths) in the
+   compressed data is represented using a Huffman code, using one code
+   tree for literals and lengths and a separate code tree for distances.
+   The code trees for each block appear in a compact form just before
+   the compressed data for that block.
+
+
+
+
+
+
+
+
+
+
+Deutsch                      Informational                      [Page 4]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+3. Detailed specification
+
+   3.1. Overall conventions In the diagrams below, a box like this:
+
+         +---+
+         |   | <-- the vertical bars might be missing
+         +---+
+
+      represents one byte; a box like this:
+
+         +==============+
+         |              |
+         +==============+
+
+      represents a variable number of bytes.
+
+      Bytes stored within a computer do not have a "bit order", since
+      they are always treated as a unit.  However, a byte considered as
+      an integer between 0 and 255 does have a most- and least-
+      significant bit, and since we write numbers with the most-
+      significant digit on the left, we also write bytes with the most-
+      significant bit on the left.  In the diagrams below, we number the
+      bits of a byte so that bit 0 is the least-significant bit, i.e.,
+      the bits are numbered:
+
+         +--------+
+         |76543210|
+         +--------+
+
+      Within a computer, a number may occupy multiple bytes.  All
+      multi-byte numbers in the format described here are stored with
+      the least-significant byte first (at the lower memory address).
+      For example, the decimal number 520 is stored as:
+
+             0        1
+         +--------+--------+
+         |00001000|00000010|
+         +--------+--------+
+          ^        ^
+          |        |
+          |        + more significant byte = 2 x 256
+          + less significant byte = 8
+
+      3.1.1. Packing into bytes
+
+         This document does not address the issue of the order in which
+         bits of a byte are transmitted on a bit-sequential medium,
+         since the final data format described here is byte- rather than
+
+
+
+Deutsch                      Informational                      [Page 5]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+         bit-oriented.  However, we describe the compressed block format
+         in below, as a sequence of data elements of various bit
+         lengths, not a sequence of bytes.  We must therefore specify
+         how to pack these data elements into bytes to form the final
+         compressed byte sequence:
+
+             * Data elements are packed into bytes in order of
+               increasing bit number within the byte, i.e., starting
+               with the least-significant bit of the byte.
+             * Data elements other than Huffman codes are packed
+               starting with the least-significant bit of the data
+               element.
+             * Huffman codes are packed starting with the most-
+               significant bit of the code.
+
+         In other words, if one were to print out the compressed data as
+         a sequence of bytes, starting with the first byte at the
+         *right* margin and proceeding to the *left*, with the most-
+         significant bit of each byte on the left as usual, one would be
+         able to parse the result from right to left, with fixed-width
+         elements in the correct MSB-to-LSB order and Huffman codes in
+         bit-reversed order (i.e., with the first bit of the code in the
+         relative LSB position).
+
+   3.2. Compressed block format
+
+      3.2.1. Synopsis of prefix and Huffman coding
+
+         Prefix coding represents symbols from an a priori known
+         alphabet by bit sequences (codes), one code for each symbol, in
+         a manner such that different symbols may be represented by bit
+         sequences of different lengths, but a parser can always parse
+         an encoded string unambiguously symbol-by-symbol.
+
+         We define a prefix code in terms of a binary tree in which the
+         two edges descending from each non-leaf node are labeled 0 and
+         1 and in which the leaf nodes correspond one-for-one with (are
+         labeled with) the symbols of the alphabet; then the code for a
+         symbol is the sequence of 0's and 1's on the edges leading from
+         the root to the leaf labeled with that symbol.  For example:
+
+
+
+
+
+
+
+
+
+
+
+Deutsch                      Informational                      [Page 6]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+                          /\              Symbol    Code
+                         0  1             ------    ----
+                        /    \                A      00
+                       /\     B               B       1
+                      0  1                    C     011
+                     /    \                   D     010
+                    A     /\
+                         0  1
+                        /    \
+                       D      C
+
+         A parser can decode the next symbol from an encoded input
+         stream by walking down the tree from the root, at each step
+         choosing the edge corresponding to the next input bit.
+
+         Given an alphabet with known symbol frequencies, the Huffman
+         algorithm allows the construction of an optimal prefix code
+         (one which represents strings with those symbol frequencies
+         using the fewest bits of any possible prefix codes for that
+         alphabet).  Such a code is called a Huffman code.  (See
+         reference [1] in Chapter 5, references for additional
+         information on Huffman codes.)
+
+         Note that in the "deflate" format, the Huffman codes for the
+         various alphabets must not exceed certain maximum code lengths.
+         This constraint complicates the algorithm for computing code
+         lengths from symbol frequencies.  Again, see Chapter 5,
+         references for details.
+
+      3.2.2. Use of Huffman coding in the "deflate" format
+
+         The Huffman codes used for each alphabet in the "deflate"
+         format have two additional rules:
+
+             * All codes of a given bit length have lexicographically
+               consecutive values, in the same order as the symbols
+               they represent;
+
+             * Shorter codes lexicographically precede longer codes.
+
+
+
+
+
+
+
+
+
+
+
+
+Deutsch                      Informational                      [Page 7]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+         We could recode the example above to follow this rule as
+         follows, assuming that the order of the alphabet is ABCD:
+
+            Symbol  Code
+            ------  ----
+            A       10
+            B       0
+            C       110
+            D       111
+
+         I.e., 0 precedes 10 which precedes 11x, and 110 and 111 are
+         lexicographically consecutive.
+
+         Given this rule, we can define the Huffman code for an alphabet
+         just by giving the bit lengths of the codes for each symbol of
+         the alphabet in order; this is sufficient to determine the
+         actual codes.  In our example, the code is completely defined
+         by the sequence of bit lengths (2, 1, 3, 3).  The following
+         algorithm generates the codes as integers, intended to be read
+         from most- to least-significant bit.  The code lengths are
+         initially in tree[I].Len; the codes are produced in
+         tree[I].Code.
+
+         1)  Count the number of codes for each code length.  Let
+             bl_count[N] be the number of codes of length N, N >= 1.
+
+         2)  Find the numerical value of the smallest code for each
+             code length:
+
+                code = 0;
+                bl_count[0] = 0;
+                for (bits = 1; bits <= MAX_BITS; bits++) {
+                    code = (code + bl_count[bits-1]) << 1;
+                    next_code[bits] = code;
+                }
+
+         3)  Assign numerical values to all codes, using consecutive
+             values for all codes of the same length with the base
+             values determined at step 2. Codes that are never used
+             (which have a bit length of zero) must not be assigned a
+             value.
+
+                for (n = 0;  n <= max_code; n++) {
+                    len = tree[n].Len;
+                    if (len != 0) {
+                        tree[n].Code = next_code[len];
+                        next_code[len]++;
+                    }
+
+
+
+Deutsch                      Informational                      [Page 8]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+                }
+
+         Example:
+
+         Consider the alphabet ABCDEFGH, with bit lengths (3, 3, 3, 3,
+         3, 2, 4, 4).  After step 1, we have:
+
+            N      bl_count[N]
+            -      -----------
+            2      1
+            3      5
+            4      2
+
+         Step 2 computes the following next_code values:
+
+            N      next_code[N]
+            -      ------------
+            1      0
+            2      0
+            3      2
+            4      14
+
+         Step 3 produces the following code values:
+
+            Symbol Length   Code
+            ------ ------   ----
+            A       3        010
+            B       3        011
+            C       3        100
+            D       3        101
+            E       3        110
+            F       2         00
+            G       4       1110
+            H       4       1111
+
+      3.2.3. Details of block format
+
+         Each block of compressed data begins with 3 header bits
+         containing the following data:
+
+            first bit       BFINAL
+            next 2 bits     BTYPE
+
+         Note that the header bits do not necessarily begin on a byte
+         boundary, since a block does not necessarily occupy an integral
+         number of bytes.
+
+
+
+
+
+Deutsch                      Informational                      [Page 9]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+         BFINAL is set if and only if this is the last block of the data
+         set.
+
+         BTYPE specifies how the data are compressed, as follows:
+
+            00 - no compression
+            01 - compressed with fixed Huffman codes
+            10 - compressed with dynamic Huffman codes
+            11 - reserved (error)
+
+         The only difference between the two compressed cases is how the
+         Huffman codes for the literal/length and distance alphabets are
+         defined.
+
+         In all cases, the decoding algorithm for the actual data is as
+         follows:
+
+            do
+               read block header from input stream.
+               if stored with no compression
+                  skip any remaining bits in current partially
+                     processed byte
+                  read LEN and NLEN (see next section)
+                  copy LEN bytes of data to output
+               otherwise
+                  if compressed with dynamic Huffman codes
+                     read representation of code trees (see
+                        subsection below)
+                  loop (until end of block code recognized)
+                     decode literal/length value from input stream
+                     if value < 256
+                        copy value (literal byte) to output stream
+                     otherwise
+                        if value = end of block (256)
+                           break from loop
+                        otherwise (value = 257..285)
+                           decode distance from input stream
+
+                           move backwards distance bytes in the output
+                           stream, and copy length bytes from this
+                           position to the output stream.
+                  end loop
+            while not last block
+
+         Note that a duplicated string reference may refer to a string
+         in a previous block; i.e., the backward distance may cross one
+         or more block boundaries.  However a distance cannot refer past
+         the beginning of the output stream.  (An application using a
+
+
+
+Deutsch                      Informational                     [Page 10]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+         preset dictionary might discard part of the output stream; a
+         distance can refer to that part of the output stream anyway)
+         Note also that the referenced string may overlap the current
+         position; for example, if the last 2 bytes decoded have values
+         X and Y, a string reference with <length = 5, distance = 2>
+         adds X,Y,X,Y,X to the output stream.
+
+         We now specify each compression method in turn.
+
+      3.2.4. Non-compressed blocks (BTYPE=00)
+
+         Any bits of input up to the next byte boundary are ignored.
+         The rest of the block consists of the following information:
+
+              0   1   2   3   4...
+            +---+---+---+---+================================+
+            |  LEN  | NLEN  |... LEN bytes of literal data...|
+            +---+---+---+---+================================+
+
+         LEN is the number of data bytes in the block.  NLEN is the
+         one's complement of LEN.
+
+      3.2.5. Compressed blocks (length and distance codes)
+
+         As noted above, encoded data blocks in the "deflate" format
+         consist of sequences of symbols drawn from three conceptually
+         distinct alphabets: either literal bytes, from the alphabet of
+         byte values (0..255), or <length, backward distance> pairs,
+         where the length is drawn from (3..258) and the distance is
+         drawn from (1..32,768).  In fact, the literal and length
+         alphabets are merged into a single alphabet (0..285), where
+         values 0..255 represent literal bytes, the value 256 indicates
+         end-of-block, and values 257..285 represent length codes
+         (possibly in conjunction with extra bits following the symbol
+         code) as follows:
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Deutsch                      Informational                     [Page 11]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+                 Extra               Extra               Extra
+            Code Bits Length(s) Code Bits Lengths   Code Bits Length(s)
+            ---- ---- ------     ---- ---- -------   ---- ---- -------
+             257   0     3       267   1   15,16     277   4   67-82
+             258   0     4       268   1   17,18     278   4   83-98
+             259   0     5       269   2   19-22     279   4   99-114
+             260   0     6       270   2   23-26     280   4  115-130
+             261   0     7       271   2   27-30     281   5  131-162
+             262   0     8       272   2   31-34     282   5  163-194
+             263   0     9       273   3   35-42     283   5  195-226
+             264   0    10       274   3   43-50     284   5  227-257
+             265   1  11,12      275   3   51-58     285   0    258
+             266   1  13,14      276   3   59-66
+
+         The extra bits should be interpreted as a machine integer
+         stored with the most-significant bit first, e.g., bits 1110
+         represent the value 14.
+
+                  Extra           Extra               Extra
+             Code Bits Dist  Code Bits   Dist     Code Bits Distance
+             ---- ---- ----  ---- ----  ------    ---- ---- --------
+               0   0    1     10   4     33-48    20    9   1025-1536
+               1   0    2     11   4     49-64    21    9   1537-2048
+               2   0    3     12   5     65-96    22   10   2049-3072
+               3   0    4     13   5     97-128   23   10   3073-4096
+               4   1   5,6    14   6    129-192   24   11   4097-6144
+               5   1   7,8    15   6    193-256   25   11   6145-8192
+               6   2   9-12   16   7    257-384   26   12  8193-12288
+               7   2  13-16   17   7    385-512   27   12 12289-16384
+               8   3  17-24   18   8    513-768   28   13 16385-24576
+               9   3  25-32   19   8   769-1024   29   13 24577-32768
+
+      3.2.6. Compression with fixed Huffman codes (BTYPE=01)
+
+         The Huffman codes for the two alphabets are fixed, and are not
+         represented explicitly in the data.  The Huffman code lengths
+         for the literal/length alphabet are:
+
+                   Lit Value    Bits        Codes
+                   ---------    ----        -----
+                     0 - 143     8          00110000 through
+                                            10111111
+                   144 - 255     9          110010000 through
+                                            111111111
+                   256 - 279     7          0000000 through
+                                            0010111
+                   280 - 287     8          11000000 through
+                                            11000111
+
+
+
+Deutsch                      Informational                     [Page 12]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+         The code lengths are sufficient to generate the actual codes,
+         as described above; we show the codes in the table for added
+         clarity.  Literal/length values 286-287 will never actually
+         occur in the compressed data, but participate in the code
+         construction.
+
+         Distance codes 0-31 are represented by (fixed-length) 5-bit
+         codes, with possible additional bits as shown in the table
+         shown in Paragraph 3.2.5, above.  Note that distance codes 30-
+         31 will never actually occur in the compressed data.
+
+      3.2.7. Compression with dynamic Huffman codes (BTYPE=10)
+
+         The Huffman codes for the two alphabets appear in the block
+         immediately after the header bits and before the actual
+         compressed data, first the literal/length code and then the
+         distance code.  Each code is defined by a sequence of code
+         lengths, as discussed in Paragraph 3.2.2, above.  For even
+         greater compactness, the code length sequences themselves are
+         compressed using a Huffman code.  The alphabet for code lengths
+         is as follows:
+
+               0 - 15: Represent code lengths of 0 - 15
+                   16: Copy the previous code length 3 - 6 times.
+                       The next 2 bits indicate repeat length
+                             (0 = 3, ... , 3 = 6)
+                          Example:  Codes 8, 16 (+2 bits 11),
+                                    16 (+2 bits 10) will expand to
+                                    12 code lengths of 8 (1 + 6 + 5)
+                   17: Repeat a code length of 0 for 3 - 10 times.
+                       (3 bits of length)
+                   18: Repeat a code length of 0 for 11 - 138 times
+                       (7 bits of length)
+
+         A code length of 0 indicates that the corresponding symbol in
+         the literal/length or distance alphabet will not occur in the
+         block, and should not participate in the Huffman code
+         construction algorithm given earlier.  If only one distance
+         code is used, it is encoded using one bit, not zero bits; in
+         this case there is a single code length of one, with one unused
+         code.  One distance code of zero bits means that there are no
+         distance codes used at all (the data is all literals).
+
+         We can now define the format of the block:
+
+               5 Bits: HLIT, # of Literal/Length codes - 257 (257 - 286)
+               5 Bits: HDIST, # of Distance codes - 1        (1 - 32)
+               4 Bits: HCLEN, # of Code Length codes - 4     (4 - 19)
+
+
+
+Deutsch                      Informational                     [Page 13]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+               (HCLEN + 4) x 3 bits: code lengths for the code length
+                  alphabet given just above, in the order: 16, 17, 18,
+                  0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
+
+                  These code lengths are interpreted as 3-bit integers
+                  (0-7); as above, a code length of 0 means the
+                  corresponding symbol (literal/length or distance code
+                  length) is not used.
+
+               HLIT + 257 code lengths for the literal/length alphabet,
+                  encoded using the code length Huffman code
+
+               HDIST + 1 code lengths for the distance alphabet,
+                  encoded using the code length Huffman code
+
+               The actual compressed data of the block,
+                  encoded using the literal/length and distance Huffman
+                  codes
+
+               The literal/length symbol 256 (end of data),
+                  encoded using the literal/length Huffman code
+
+         The code length repeat codes can cross from HLIT + 257 to the
+         HDIST + 1 code lengths.  In other words, all code lengths form
+         a single sequence of HLIT + HDIST + 258 values.
+
+   3.3. Compliance
+
+      A compressor may limit further the ranges of values specified in
+      the previous section and still be compliant; for example, it may
+      limit the range of backward pointers to some value smaller than
+      32K.  Similarly, a compressor may limit the size of blocks so that
+      a compressible block fits in memory.
+
+      A compliant decompressor must accept the full range of possible
+      values defined in the previous section, and must accept blocks of
+      arbitrary size.
+
+4. Compression algorithm details
+
+   While it is the intent of this document to define the "deflate"
+   compressed data format without reference to any particular
+   compression algorithm, the format is related to the compressed
+   formats produced by LZ77 (Lempel-Ziv 1977, see reference [2] below);
+   since many variations of LZ77 are patented, it is strongly
+   recommended that the implementor of a compressor follow the general
+   algorithm presented here, which is known not to be patented per se.
+   The material in this section is not part of the definition of the
+
+
+
+Deutsch                      Informational                     [Page 14]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+   specification per se, and a compressor need not follow it in order to
+   be compliant.
+
+   The compressor terminates a block when it determines that starting a
+   new block with fresh trees would be useful, or when the block size
+   fills up the compressor's block buffer.
+
+   The compressor uses a chained hash table to find duplicated strings,
+   using a hash function that operates on 3-byte sequences.  At any
+   given point during compression, let XYZ be the next 3 input bytes to
+   be examined (not necessarily all different, of course).  First, the
+   compressor examines the hash chain for XYZ.  If the chain is empty,
+   the compressor simply writes out X as a literal byte and advances one
+   byte in the input.  If the hash chain is not empty, indicating that
+   the sequence XYZ (or, if we are unlucky, some other 3 bytes with the
+   same hash function value) has occurred recently, the compressor
+   compares all strings on the XYZ hash chain with the actual input data
+   sequence starting at the current point, and selects the longest
+   match.
+
+   The compressor searches the hash chains starting with the most recent
+   strings, to favor small distances and thus take advantage of the
+   Huffman encoding.  The hash chains are singly linked. There are no
+   deletions from the hash chains; the algorithm simply discards matches
+   that are too old.  To avoid a worst-case situation, very long hash
+   chains are arbitrarily truncated at a certain length, determined by a
+   run-time parameter.
+
+   To improve overall compression, the compressor optionally defers the
+   selection of matches ("lazy matching"): after a match of length N has
+   been found, the compressor searches for a longer match starting at
+   the next input byte.  If it finds a longer match, it truncates the
+   previous match to a length of one (thus producing a single literal
+   byte) and then emits the longer match.  Otherwise, it emits the
+   original match, and, as described above, advances N bytes before
+   continuing.
+
+   Run-time parameters also control this "lazy match" procedure.  If
+   compression ratio is most important, the compressor attempts a
+   complete second search regardless of the length of the first match.
+   In the normal case, if the current match is "long enough", the
+   compressor reduces the search for a longer match, thus speeding up
+   the process.  If speed is most important, the compressor inserts new
+   strings in the hash table only when no match was found, or when the
+   match is not "too long".  This degrades the compression ratio but
+   saves time since there are both fewer insertions and fewer searches.
+
+
+
+
+
+Deutsch                      Informational                     [Page 15]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+5. References
+
+   [1] Huffman, D. A., "A Method for the Construction of Minimum
+       Redundancy Codes", Proceedings of the Institute of Radio
+       Engineers, September 1952, Volume 40, Number 9, pp. 1098-1101.
+
+   [2] Ziv J., Lempel A., "A Universal Algorithm for Sequential Data
+       Compression", IEEE Transactions on Information Theory, Vol. 23,
+       No. 3, pp. 337-343.
+
+   [3] Gailly, J.-L., and Adler, M., ZLIB documentation and sources,
+       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
+
+   [4] Gailly, J.-L., and Adler, M., GZIP documentation and sources,
+       available as gzip-*.tar in ftp://prep.ai.mit.edu/pub/gnu/
+
+   [5] Schwartz, E. S., and Kallick, B. "Generating a canonical prefix
+       encoding." Comm. ACM, 7,3 (Mar. 1964), pp. 166-169.
+
+   [6] Hirschberg and Lelewer, "Efficient decoding of prefix codes,"
+       Comm. ACM, 33,4, April 1990, pp. 449-459.
+
+6. Security Considerations
+
+   Any data compression method involves the reduction of redundancy in
+   the data.  Consequently, any corruption of the data is likely to have
+   severe effects and be difficult to correct.  Uncompressed text, on
+   the other hand, will probably still be readable despite the presence
+   of some corrupted bytes.
+
+   It is recommended that systems using this data format provide some
+   means of validating the integrity of the compressed data.  See
+   reference [3], for example.
+
+7. Source code
+
+   Source code for a C language implementation of a "deflate" compliant
+   compressor and decompressor is available within the zlib package at
+   ftp://ftp.uu.net/pub/archiving/zip/zlib/.
+
+8. Acknowledgements
+
+   Trademarks cited in this document are the property of their
+   respective owners.
+
+   Phil Katz designed the deflate format.  Jean-Loup Gailly and Mark
+   Adler wrote the related software described in this specification.
+   Glenn Randers-Pehrson converted this document to RFC and HTML format.
+
+
+
+Deutsch                      Informational                     [Page 16]
+
+RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
+
+
+9. Author's Address
+
+   L. Peter Deutsch
+   Aladdin Enterprises
+   203 Santa Margarita Ave.
+   Menlo Park, CA 94025
+
+   Phone: (415) 322-0103 (AM only)
+   FAX:   (415) 322-1734
+   EMail: <ghost@aladdin.com>
+
+   Questions about the technical content of this specification can be
+   sent by email to:
+
+   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
+   Mark Adler <madler@alumni.caltech.edu>
+
+   Editorial comments on this specification can be sent by email to:
+
+   L. Peter Deutsch <ghost@aladdin.com> and
+   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Deutsch                      Informational                     [Page 17]
+
diff --git a/doc/rfc1952.txt b/doc/rfc1952.txt
new file mode 100644
index 0000000..a8e51b4
--- /dev/null
+++ b/doc/rfc1952.txt
@@ -0,0 +1,675 @@
+
+
+
+
+
+
+Network Working Group                                         P. Deutsch
+Request for Comments: 1952                           Aladdin Enterprises
+Category: Informational                                         May 1996
+
+
+               GZIP file format specification version 4.3
+
+Status of This Memo
+
+   This memo provides information for the Internet community.  This memo
+   does not specify an Internet standard of any kind.  Distribution of
+   this memo is unlimited.
+
+IESG Note:
+
+   The IESG takes no position on the validity of any Intellectual
+   Property Rights statements contained in this document.
+
+Notices
+
+   Copyright (c) 1996 L. Peter Deutsch
+
+   Permission is granted to copy and distribute this document for any
+   purpose and without charge, including translations into other
+   languages and incorporation into compilations, provided that the
+   copyright notice and this notice are preserved, and that any
+   substantive changes or deletions from the original are clearly
+   marked.
+
+   A pointer to the latest version of this and related documentation in
+   HTML format can be found at the URL
+   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
+
+Abstract
+
+   This specification defines a lossless compressed data format that is
+   compatible with the widely used GZIP utility.  The format includes a
+   cyclic redundancy check value for detecting data corruption.  The
+   format presently uses the DEFLATE method of compression but can be
+   easily extended to use other compression methods.  The format can be
+   implemented readily in a manner not covered by patents.
+
+
+
+
+
+
+
+
+
+
+Deutsch                      Informational                      [Page 1]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+Table of Contents
+
+   1. Introduction ................................................... 2
+      1.1. Purpose ................................................... 2
+      1.2. Intended audience ......................................... 3
+      1.3. Scope ..................................................... 3
+      1.4. Compliance ................................................ 3
+      1.5. Definitions of terms and conventions used ................. 3
+      1.6. Changes from previous versions ............................ 3
+   2. Detailed specification ......................................... 4
+      2.1. Overall conventions ....................................... 4
+      2.2. File format ............................................... 5
+      2.3. Member format ............................................. 5
+          2.3.1. Member header and trailer ........................... 6
+              2.3.1.1. Extra field ................................... 8
+              2.3.1.2. Compliance .................................... 9
+      3. References .................................................. 9
+      4. Security Considerations .................................... 10
+      5. Acknowledgements ........................................... 10
+      6. Author's Address ........................................... 10
+      7. Appendix: Jean-Loup Gailly's gzip utility .................. 11
+      8. Appendix: Sample CRC Code .................................. 11
+
+1. Introduction
+
+   1.1. Purpose
+
+      The purpose of this specification is to define a lossless
+      compressed data format that:
+
+          * Is independent of CPU type, operating system, file system,
+            and character set, and hence can be used for interchange;
+          * Can compress or decompress a data stream (as opposed to a
+            randomly accessible file) to produce another data stream,
+            using only an a priori bounded amount of intermediate
+            storage, and hence can be used in data communications or
+            similar structures such as Unix filters;
+          * Compresses data with efficiency comparable to the best
+            currently available general-purpose compression methods,
+            and in particular considerably better than the "compress"
+            program;
+          * Can be implemented readily in a manner not covered by
+            patents, and hence can be practiced freely;
+          * Is compatible with the file format produced by the current
+            widely used gzip utility, in that conforming decompressors
+            will be able to read data produced by the existing gzip
+            compressor.
+
+
+
+
+Deutsch                      Informational                      [Page 2]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+      The data format defined by this specification does not attempt to:
+
+          * Provide random access to compressed data;
+          * Compress specialized data (e.g., raster graphics) as well as
+            the best currently available specialized algorithms.
+
+   1.2. Intended audience
+
+      This specification is intended for use by implementors of software
+      to compress data into gzip format and/or decompress data from gzip
+      format.
+
+      The text of the specification assumes a basic background in
+      programming at the level of bits and other primitive data
+      representations.
+
+   1.3. Scope
+
+      The specification specifies a compression method and a file format
+      (the latter assuming only that a file can store a sequence of
+      arbitrary bytes).  It does not specify any particular interface to
+      a file system or anything about character sets or encodings
+      (except for file names and comments, which are optional).
+
+   1.4. Compliance
+
+      Unless otherwise indicated below, a compliant decompressor must be
+      able to accept and decompress any file that conforms to all the
+      specifications presented here; a compliant compressor must produce
+      files that conform to all the specifications presented here.  The
+      material in the appendices is not part of the specification per se
+      and is not relevant to compliance.
+
+   1.5. Definitions of terms and conventions used
+
+      byte: 8 bits stored or transmitted as a unit (same as an octet).
+      (For this specification, a byte is exactly 8 bits, even on
+      machines which store a character on a number of bits different
+      from 8.)  See below for the numbering of bits within a byte.
+
+   1.6. Changes from previous versions
+
+      There have been no technical changes to the gzip format since
+      version 4.1 of this specification.  In version 4.2, some
+      terminology was changed, and the sample CRC code was rewritten for
+      clarity and to eliminate the requirement for the caller to do pre-
+      and post-conditioning.  Version 4.3 is a conversion of the
+      specification to RFC style.
+
+
+
+Deutsch                      Informational                      [Page 3]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+2. Detailed specification
+
+   2.1. Overall conventions
+
+      In the diagrams below, a box like this:
+
+         +---+
+         |   | <-- the vertical bars might be missing
+         +---+
+
+      represents one byte; a box like this:
+
+         +==============+
+         |              |
+         +==============+
+
+      represents a variable number of bytes.
+
+      Bytes stored within a computer do not have a "bit order", since
+      they are always treated as a unit.  However, a byte considered as
+      an integer between 0 and 255 does have a most- and least-
+      significant bit, and since we write numbers with the most-
+      significant digit on the left, we also write bytes with the most-
+      significant bit on the left.  In the diagrams below, we number the
+      bits of a byte so that bit 0 is the least-significant bit, i.e.,
+      the bits are numbered:
+
+         +--------+
+         |76543210|
+         +--------+
+
+      This document does not address the issue of the order in which
+      bits of a byte are transmitted on a bit-sequential medium, since
+      the data format described here is byte- rather than bit-oriented.
+
+      Within a computer, a number may occupy multiple bytes.  All
+      multi-byte numbers in the format described here are stored with
+      the least-significant byte first (at the lower memory address).
+      For example, the decimal number 520 is stored as:
+
+             0        1
+         +--------+--------+
+         |00001000|00000010|
+         +--------+--------+
+          ^        ^
+          |        |
+          |        + more significant byte = 2 x 256
+          + less significant byte = 8
+
+
+
+Deutsch                      Informational                      [Page 4]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+   2.2. File format
+
+      A gzip file consists of a series of "members" (compressed data
+      sets).  The format of each member is specified in the following
+      section.  The members simply appear one after another in the file,
+      with no additional information before, between, or after them.
+
+   2.3. Member format
+
+      Each member has the following structure:
+
+         +---+---+---+---+---+---+---+---+---+---+
+         |ID1|ID2|CM |FLG|     MTIME     |XFL|OS | (more-->)
+         +---+---+---+---+---+---+---+---+---+---+
+
+      (if FLG.FEXTRA set)
+
+         +---+---+=================================+
+         | XLEN  |...XLEN bytes of "extra field"...| (more-->)
+         +---+---+=================================+
+
+      (if FLG.FNAME set)
+
+         +=========================================+
+         |...original file name, zero-terminated...| (more-->)
+         +=========================================+
+
+      (if FLG.FCOMMENT set)
+
+         +===================================+
+         |...file comment, zero-terminated...| (more-->)
+         +===================================+
+
+      (if FLG.FHCRC set)
+
+         +---+---+
+         | CRC16 |
+         +---+---+
+
+         +=======================+
+         |...compressed blocks...| (more-->)
+         +=======================+
+
+           0   1   2   3   4   5   6   7
+         +---+---+---+---+---+---+---+---+
+         |     CRC32     |     ISIZE     |
+         +---+---+---+---+---+---+---+---+
+
+
+
+
+Deutsch                      Informational                      [Page 5]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+      2.3.1. Member header and trailer
+
+         ID1 (IDentification 1)
+         ID2 (IDentification 2)
+            These have the fixed values ID1 = 31 (0x1f, \037), ID2 = 139
+            (0x8b, \213), to identify the file as being in gzip format.
+
+         CM (Compression Method)
+            This identifies the compression method used in the file.  CM
+            = 0-7 are reserved.  CM = 8 denotes the "deflate"
+            compression method, which is the one customarily used by
+            gzip and which is documented elsewhere.
+
+         FLG (FLaGs)
+            This flag byte is divided into individual bits as follows:
+
+               bit 0   FTEXT
+               bit 1   FHCRC
+               bit 2   FEXTRA
+               bit 3   FNAME
+               bit 4   FCOMMENT
+               bit 5   reserved
+               bit 6   reserved
+               bit 7   reserved
+
+            If FTEXT is set, the file is probably ASCII text.  This is
+            an optional indication, which the compressor may set by
+            checking a small amount of the input data to see whether any
+            non-ASCII characters are present.  In case of doubt, FTEXT
+            is cleared, indicating binary data. For systems which have
+            different file formats for ascii text and binary data, the
+            decompressor can use FTEXT to choose the appropriate format.
+            We deliberately do not specify the algorithm used to set
+            this bit, since a compressor always has the option of
+            leaving it cleared and a decompressor always has the option
+            of ignoring it and letting some other program handle issues
+            of data conversion.
+
+            If FHCRC is set, a CRC16 for the gzip header is present,
+            immediately before the compressed data. The CRC16 consists
+            of the two least significant bytes of the CRC32 for all
+            bytes of the gzip header up to and not including the CRC16.
+            [The FHCRC bit was never set by versions of gzip up to
+            1.2.4, even though it was documented with a different
+            meaning in gzip 1.2.4.]
+
+            If FEXTRA is set, optional extra fields are present, as
+            described in a following section.
+
+
+
+Deutsch                      Informational                      [Page 6]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+            If FNAME is set, an original file name is present,
+            terminated by a zero byte.  The name must consist of ISO
+            8859-1 (LATIN-1) characters; on operating systems using
+            EBCDIC or any other character set for file names, the name
+            must be translated to the ISO LATIN-1 character set.  This
+            is the original name of the file being compressed, with any
+            directory components removed, and, if the file being
+            compressed is on a file system with case insensitive names,
+            forced to lower case. There is no original file name if the
+            data was compressed from a source other than a named file;
+            for example, if the source was stdin on a Unix system, there
+            is no file name.
+
+            If FCOMMENT is set, a zero-terminated file comment is
+            present.  This comment is not interpreted; it is only
+            intended for human consumption.  The comment must consist of
+            ISO 8859-1 (LATIN-1) characters.  Line breaks should be
+            denoted by a single line feed character (10 decimal).
+
+            Reserved FLG bits must be zero.
+
+         MTIME (Modification TIME)
+            This gives the most recent modification time of the original
+            file being compressed.  The time is in Unix format, i.e.,
+            seconds since 00:00:00 GMT, Jan.  1, 1970.  (Note that this
+            may cause problems for MS-DOS and other systems that use
+            local rather than Universal time.)  If the compressed data
+            did not come from a file, MTIME is set to the time at which
+            compression started.  MTIME = 0 means no time stamp is
+            available.
+
+         XFL (eXtra FLags)
+            These flags are available for use by specific compression
+            methods.  The "deflate" method (CM = 8) sets these flags as
+            follows:
+
+               XFL = 2 - compressor used maximum compression,
+                         slowest algorithm
+               XFL = 4 - compressor used fastest algorithm
+
+         OS (Operating System)
+            This identifies the type of file system on which compression
+            took place.  This may be useful in determining end-of-line
+            convention for text files.  The currently defined values are
+            as follows:
+
+
+
+
+
+
+Deutsch                      Informational                      [Page 7]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+                 0 - FAT filesystem (MS-DOS, OS/2, NT/Win32)
+                 1 - Amiga
+                 2 - VMS (or OpenVMS)
+                 3 - Unix
+                 4 - VM/CMS
+                 5 - Atari TOS
+                 6 - HPFS filesystem (OS/2, NT)
+                 7 - Macintosh
+                 8 - Z-System
+                 9 - CP/M
+                10 - TOPS-20
+                11 - NTFS filesystem (NT)
+                12 - QDOS
+                13 - Acorn RISCOS
+               255 - unknown
+
+         XLEN (eXtra LENgth)
+            If FLG.FEXTRA is set, this gives the length of the optional
+            extra field.  See below for details.
+
+         CRC32 (CRC-32)
+            This contains a Cyclic Redundancy Check value of the
+            uncompressed data computed according to CRC-32 algorithm
+            used in the ISO 3309 standard and in section 8.1.1.6.2 of
+            ITU-T recommendation V.42.  (See http://www.iso.ch for
+            ordering ISO documents. See gopher://info.itu.ch for an
+            online version of ITU-T V.42.)
+
+         ISIZE (Input SIZE)
+            This contains the size of the original (uncompressed) input
+            data modulo 2^32.
+
+      2.3.1.1. Extra field
+
+         If the FLG.FEXTRA bit is set, an "extra field" is present in
+         the header, with total length XLEN bytes.  It consists of a
+         series of subfields, each of the form:
+
+            +---+---+---+---+==================================+
+            |SI1|SI2|  LEN  |... LEN bytes of subfield data ...|
+            +---+---+---+---+==================================+
+
+         SI1 and SI2 provide a subfield ID, typically two ASCII letters
+         with some mnemonic value.  Jean-Loup Gailly
+         <gzip@prep.ai.mit.edu> is maintaining a registry of subfield
+         IDs; please send him any subfield ID you wish to use.  Subfield
+         IDs with SI2 = 0 are reserved for future use.  The following
+         IDs are currently defined:
+
+
+
+Deutsch                      Informational                      [Page 8]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+            SI1         SI2         Data
+            ----------  ----------  ----
+            0x41 ('A')  0x70 ('P')  Apollo file type information
+
+         LEN gives the length of the subfield data, excluding the 4
+         initial bytes.
+
+      2.3.1.2. Compliance
+
+         A compliant compressor must produce files with correct ID1,
+         ID2, CM, CRC32, and ISIZE, but may set all the other fields in
+         the fixed-length part of the header to default values (255 for
+         OS, 0 for all others).  The compressor must set all reserved
+         bits to zero.
+
+         A compliant decompressor must check ID1, ID2, and CM, and
+         provide an error indication if any of these have incorrect
+         values.  It must examine FEXTRA/XLEN, FNAME, FCOMMENT and FHCRC
+         at least so it can skip over the optional fields if they are
+         present.  It need not examine any other part of the header or
+         trailer; in particular, a decompressor may ignore FTEXT and OS
+         and always produce binary output, and still be compliant.  A
+         compliant decompressor must give an error indication if any
+         reserved bit is non-zero, since such a bit could indicate the
+         presence of a new field that would cause subsequent data to be
+         interpreted incorrectly.
+
+3. References
+
+   [1] "Information Processing - 8-bit single-byte coded graphic
+       character sets - Part 1: Latin alphabet No.1" (ISO 8859-1:1987).
+       The ISO 8859-1 (Latin-1) character set is a superset of 7-bit
+       ASCII. Files defining this character set are available as
+       iso_8859-1.* in ftp://ftp.uu.net/graphics/png/documents/
+
+   [2] ISO 3309
+
+   [3] ITU-T recommendation V.42
+
+   [4] Deutsch, L.P.,"DEFLATE Compressed Data Format Specification",
+       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
+
+   [5] Gailly, J.-L., GZIP documentation, available as gzip-*.tar in
+       ftp://prep.ai.mit.edu/pub/gnu/
+
+   [6] Sarwate, D.V., "Computation of Cyclic Redundancy Checks via Table
+       Look-Up", Communications of the ACM, 31(8), pp.1008-1013.
+
+
+
+
+Deutsch                      Informational                      [Page 9]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+   [7] Schwaderer, W.D., "CRC Calculation", April 85 PC Tech Journal,
+       pp.118-133.
+
+   [8] ftp://ftp.adelaide.edu.au/pub/rocksoft/papers/crc_v3.txt,
+       describing the CRC concept.
+
+4. Security Considerations
+
+   Any data compression method involves the reduction of redundancy in
+   the data.  Consequently, any corruption of the data is likely to have
+   severe effects and be difficult to correct.  Uncompressed text, on
+   the other hand, will probably still be readable despite the presence
+   of some corrupted bytes.
+
+   It is recommended that systems using this data format provide some
+   means of validating the integrity of the compressed data, such as by
+   setting and checking the CRC-32 check value.
+
+5. Acknowledgements
+
+   Trademarks cited in this document are the property of their
+   respective owners.
+
+   Jean-Loup Gailly designed the gzip format and wrote, with Mark Adler,
+   the related software described in this specification.  Glenn
+   Randers-Pehrson converted this document to RFC and HTML format.
+
+6. Author's Address
+
+   L. Peter Deutsch
+   Aladdin Enterprises
+   203 Santa Margarita Ave.
+   Menlo Park, CA 94025
+
+   Phone: (415) 322-0103 (AM only)
+   FAX:   (415) 322-1734
+   EMail: <ghost@aladdin.com>
+
+   Questions about the technical content of this specification can be
+   sent by email to:
+
+   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
+   Mark Adler <madler@alumni.caltech.edu>
+
+   Editorial comments on this specification can be sent by email to:
+
+   L. Peter Deutsch <ghost@aladdin.com> and
+   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
+
+
+
+Deutsch                      Informational                     [Page 10]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+7. Appendix: Jean-Loup Gailly's gzip utility
+
+   The most widely used implementation of gzip compression, and the
+   original documentation on which this specification is based, were
+   created by Jean-Loup Gailly <gzip@prep.ai.mit.edu>.  Since this
+   implementation is a de facto standard, we mention some more of its
+   features here.  Again, the material in this section is not part of
+   the specification per se, and implementations need not follow it to
+   be compliant.
+
+   When compressing or decompressing a file, gzip preserves the
+   protection, ownership, and modification time attributes on the local
+   file system, since there is no provision for representing protection
+   attributes in the gzip file format itself.  Since the file format
+   includes a modification time, the gzip decompressor provides a
+   command line switch that assigns the modification time from the file,
+   rather than the local modification time of the compressed input, to
+   the decompressed output.
+
+8. Appendix: Sample CRC Code
+
+   The following sample code represents a practical implementation of
+   the CRC (Cyclic Redundancy Check). (See also ISO 3309 and ITU-T V.42
+   for a formal specification.)
+
+   The sample code is in the ANSI C programming language. Non C users
+   may find it easier to read with these hints:
+
+      &      Bitwise AND operator.
+      ^      Bitwise exclusive-OR operator.
+      >>     Bitwise right shift operator. When applied to an
+             unsigned quantity, as here, right shift inserts zero
+             bit(s) at the left.
+      !      Logical NOT operator.
+      ++     "n++" increments the variable n.
+      0xNNN  0x introduces a hexadecimal (base 16) constant.
+             Suffix L indicates a long value (at least 32 bits).
+
+      /* Table of CRCs of all 8-bit messages. */
+      unsigned long crc_table[256];
+
+      /* Flag: has the table been computed? Initially false. */
+      int crc_table_computed = 0;
+
+      /* Make the table for a fast CRC. */
+      void make_crc_table(void)
+      {
+        unsigned long c;
+
+
+
+Deutsch                      Informational                     [Page 11]
+
+RFC 1952             GZIP File Format Specification             May 1996
+
+
+        int n, k;
+        for (n = 0; n < 256; n++) {
+          c = (unsigned long) n;
+          for (k = 0; k < 8; k++) {
+            if (c & 1) {
+              c = 0xedb88320L ^ (c >> 1);
+            } else {
+              c = c >> 1;
+            }
+          }
+          crc_table[n] = c;
+        }
+        crc_table_computed = 1;
+      }
+
+      /*
+         Update a running crc with the bytes buf[0..len-1] and return
+       the updated crc. The crc should be initialized to zero. Pre- and
+       post-conditioning (one's complement) is performed within this
+       function so it shouldn't be done by the caller. Usage example:
+
+         unsigned long crc = 0L;
+
+         while (read_buffer(buffer, length) != EOF) {
+           crc = update_crc(crc, buffer, length);
+         }
+         if (crc != original_crc) error();
+      */
+      unsigned long update_crc(unsigned long crc,
+                      unsigned char *buf, int len)
+      {
+        unsigned long c = crc ^ 0xffffffffL;
+        int n;
+
+        if (!crc_table_computed)
+          make_crc_table();
+        for (n = 0; n < len; n++) {
+          c = crc_table[(c ^ buf[n]) & 0xff] ^ (c >> 8);
+        }
+        return c ^ 0xffffffffL;
+      }
+
+      /* Return the CRC of the bytes buf[0..len-1]. */
+      unsigned long crc(unsigned char *buf, int len)
+      {
+        return update_crc(0L, buf, len);
+      }
+
+
+
+
+Deutsch                      Informational                     [Page 12]
+
diff --git a/doc/txtvsbin.txt b/doc/txtvsbin.txt
new file mode 100644
index 0000000..3d0f063
--- /dev/null
+++ b/doc/txtvsbin.txt
@@ -0,0 +1,107 @@
+A Fast Method for Identifying Plain Text Files
+==============================================
+
+
+Introduction
+------------
+
+Given a file coming from an unknown source, it is sometimes desirable
+to find out whether the format of that file is plain text.  Although
+this may appear like a simple task, a fully accurate detection of the
+file type requires heavy-duty semantic analysis on the file contents.
+It is, however, possible to obtain satisfactory results by employing
+various heuristics.
+
+Previous versions of PKZip and other zip-compatible compression tools
+were using a crude detection scheme: if more than 80% (4/5) of the bytes
+found in a certain buffer are within the range [7..127], the file is
+labeled as plain text, otherwise it is labeled as binary.  A prominent
+limitation of this scheme is the restriction to Latin-based alphabets.
+Other alphabets, like Greek, Cyrillic or Asian, make extensive use of
+the bytes within the range [128..255], and texts using these alphabets
+are most often misidentified by this scheme; in other words, the rate
+of false negatives is sometimes too high, which means that the recall
+is low.  Another weakness of this scheme is a reduced precision, due to
+the false positives that may occur when binary files containing large
+amounts of textual characters are misidentified as plain text.
+
+In this article we propose a new, simple detection scheme that features
+a much increased precision and a near-100% recall.  This scheme is
+designed to work on ASCII, Unicode and other ASCII-derived alphabets,
+and it handles single-byte encodings (ISO-8859, MacRoman, KOI8, etc.)
+and variable-sized encodings (ISO-2022, UTF-8, etc.).  Wider encodings
+(UCS-2/UTF-16 and UCS-4/UTF-32) are not handled, however.
+
+
+The Algorithm
+-------------
+
+The algorithm works by dividing the set of bytecodes [0..255] into three
+categories:
+- The white list of textual bytecodes:
+  9 (TAB), 10 (LF), 13 (CR), 32 (SPACE) to 255.
+- The gray list of tolerated bytecodes:
+  7 (BEL), 8 (BS), 11 (VT), 12 (FF), 26 (SUB), 27 (ESC).
+- The black list of undesired, non-textual bytecodes:
+  0 (NUL) to 6, 14 to 31.
+
+If a file contains at least one byte that belongs to the white list and
+no byte that belongs to the black list, then the file is categorized as
+plain text; otherwise, it is categorized as binary.  (The boundary case,
+when the file is empty, automatically falls into the latter category.)
+
+
+Rationale
+---------
+
+The idea behind this algorithm relies on two observations.
+
+The first observation is that, although the full range of 7-bit codes
+[0..127] is properly specified by the ASCII standard, most control
+characters in the range [0..31] are not used in practice.  The only
+widely-used, almost universally-portable control codes are 9 (TAB),
+10 (LF) and 13 (CR).  There are a few more control codes that are
+recognized on a reduced range of platforms and text viewers/editors:
+7 (BEL), 8 (BS), 11 (VT), 12 (FF), 26 (SUB) and 27 (ESC); but these
+codes are rarely (if ever) used alone, without being accompanied by
+some printable text.  Even the newer, portable text formats such as
+XML avoid using control characters outside the list mentioned here.
+
+The second observation is that most of the binary files tend to contain
+control characters, especially 0 (NUL).  Even though the older text
+detection schemes observe the presence of non-ASCII codes from the range
+[128..255], the precision rarely has to suffer if this upper range is
+labeled as textual, because the files that are genuinely binary tend to
+contain both control characters and codes from the upper range.  On the
+other hand, the upper range needs to be labeled as textual, because it
+is used by virtually all ASCII extensions.  In particular, this range is
+used for encoding non-Latin scripts.
+
+Since there is no counting involved, other than simply observing the
+presence or the absence of some byte values, the algorithm produces
+consistent results, regardless what alphabet encoding is being used.
+(If counting were involved, it could be possible to obtain different
+results on a text encoded, say, using ISO-8859-16 versus UTF-8.)
+
+There is an extra category of plain text files that are "polluted" with
+one or more black-listed codes, either by mistake or by peculiar design
+considerations.  In such cases, a scheme that tolerates a small fraction
+of black-listed codes would provide an increased recall (i.e. more true
+positives).  This, however, incurs a reduced precision overall, since
+false positives are more likely to appear in binary files that contain
+large chunks of textual data.  Furthermore, "polluted" plain text should
+be regarded as binary by general-purpose text detection schemes, because
+general-purpose text processing algorithms might not be applicable.
+Under this premise, it is safe to say that our detection method provides
+a near-100% recall.
+
+Experiments have been run on many files coming from various platforms
+and applications.  We tried plain text files, system logs, source code,
+formatted office documents, compiled object code, etc.  The results
+confirm the optimistic assumptions about the capabilities of this
+algorithm.
+
+
+--
+Cosmin Truta
+Last updated: 2006-May-28
diff --git a/example.c b/example.c
index 6c8a0ee..604736f 100644
--- a/example.c
+++ b/example.c
@@ -1,12 +1,12 @@
 /* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * Copyright (C) 1995-2006 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 /* @(#) $Id$ */
 
-#include <stdio.h>
 #include "zlib.h"
+#include <stdio.h>
 
 #ifdef STDC
 #  include <string.h>
diff --git a/examples/gzlog.c b/examples/gzlog.c
index f71f817..b6acdef 100644
--- a/examples/gzlog.c
+++ b/examples/gzlog.c
@@ -241,7 +241,7 @@ int gzlog_write(void *obj, char *data, size_t len)
             some = len;
         if (write(log->fd, data, some) != some)
             return 1;
-        log->crc = crc32(log->crc, data, some);
+        log->crc = crc32(log->crc, (unsigned char *)data, some);
         log->len += some;
         len -= some;
         data += some;
diff --git a/examples/zlib_how.html b/examples/zlib_how.html
index 40998db..444ff1c 100644
--- a/examples/zlib_how.html
+++ b/examples/zlib_how.html
@@ -4,7 +4,7 @@
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
 <title>zlib Usage Example</title>
-<!--  Copyright (c) 2004 Mark Adler.  -->
+<!--  Copyright (c) 2004, 2005 Mark Adler.  -->
 </head>
 <body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#00A000">
 <h2 align="center"> zlib Usage Example </h2>
@@ -21,13 +21,16 @@ Without further adieu, here is the program <a href="zpipe.c"><tt>zpipe.c</tt></a
 <pre><b>
 /* zpipe.c: example of proper use of zlib's inflate() and deflate()
    Not copyrighted -- provided to the public domain
-   Version 1.2  9 November 2004  Mark Adler */
+   Version 1.4  11 December 2005  Mark Adler */
 
 /* Version history:
    1.0  30 Oct 2004  First version
    1.1   8 Nov 2004  Add void casting for unused return values
                      Use switch statement for inflate() return values
    1.2   9 Nov 2004  Add assertions to document zlib guarantees
+   1.3   6 Apr 2005  Remove incorrect assertion in inf()
+   1.4  11 Dec 2005  Add hack to avoid MSDOS end-of-line conversions
+                     Avoid some compiler warnings for input and output buffers
  */
 </b></pre><!-- -->
 We now include the header files for the required definitions.  From
@@ -47,6 +50,21 @@ functions <tt>inflateInit()</tt>, <tt>inflate()</tt>, and
 #include &lt;assert.h&gt;
 #include "zlib.h"
 </b></pre><!-- -->
+This is an ugly hack required to avoid corruption of the input and output data on
+Windows/MS-DOS systems.  Without this, those systems would assume that the input and output
+files are text, and try to convert the end-of-line characters from one standard to
+another.  That would corrupt binary data, and in particular would render the compressed data unusable.
+This sets the input and output to binary which suppresses the end-of-line conversions.
+<tt>SET_BINARY_MODE()</tt> will be used later on <tt>stdin</tt> and <tt>stdout</tt>, at the beginning of <tt>main()</tt>.
+<pre><b>
+#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
+#  include &lt;fcntl.h&gt;
+#  include &lt;io.h&gt;
+#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#else
+#  define SET_BINARY_MODE(file)
+#endif
+</b></pre><!-- -->
 <tt>CHUNK</tt> is simply the buffer size for feeding data to and pulling data
 from the <em>zlib</em> routines.  Larger buffer sizes would be more efficient,
 especially for <tt>inflate()</tt>.  If the memory is available, buffers sizes
@@ -80,8 +98,8 @@ is used to pass information to and from the <em>zlib</em> routines, and to maint
     int ret, flush;
     unsigned have;
     z_stream strm;
-    char in[CHUNK];
-    char out[CHUNK];
+    unsigned char in[CHUNK];
+    unsigned char out[CHUNK];
 </b></pre><!-- -->
 The first thing we do is to initialize the <em>zlib</em> state for compression using
 <tt>deflateInit()</tt>.  This must be done before the first use of <tt>deflate()</tt>.
@@ -313,8 +331,8 @@ can tell from the <em>zlib</em> stream itself when the stream is complete.
     int ret;
     unsigned have;
     z_stream strm;
-    char in[CHUNK];
-    char out[CHUNK];
+    unsigned char in[CHUNK];
+    unsigned char out[CHUNK];
 </b></pre><!-- -->
 The initialization of the state is the same, except that there is no compression level,
 of course, and two more elements of the structure are initialized.  <tt>avail_in</tt>
@@ -494,6 +512,10 @@ int main(int argc, char **argv)
 {
     int ret;
 
+    /* avoid end-of-line conversions */
+    SET_BINARY_MODE(stdin);
+    SET_BINARY_MODE(stdout);
+
     /* do compression if no arguments */
     if (argc == 1) {
         ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION);
@@ -518,6 +540,6 @@ int main(int argc, char **argv)
 }
 </b></pre>
 <hr>
-<i>Copyright (c) 2004 by Mark Adler<br>Last modified 13 November 2004</i>
+<i>Copyright (c) 2004, 2005 by Mark Adler<br>Last modified 11 December 2005</i>
 </body>
 </html>
diff --git a/examples/zpipe.c b/examples/zpipe.c
index 26abb56..83535d1 100644
--- a/examples/zpipe.c
+++ b/examples/zpipe.c
@@ -1,6 +1,6 @@
 /* zpipe.c: example of proper use of zlib's inflate() and deflate()
    Not copyrighted -- provided to the public domain
-   Version 1.2  9 November 2004  Mark Adler */
+   Version 1.4  11 December 2005  Mark Adler */
 
 /* Version history:
    1.0  30 Oct 2004  First version
@@ -8,6 +8,8 @@
                      Use switch statement for inflate() return values
    1.2   9 Nov 2004  Add assertions to document zlib guarantees
    1.3   6 Apr 2005  Remove incorrect assertion in inf()
+   1.4  11 Dec 2005  Add hack to avoid MSDOS end-of-line conversions
+                     Avoid some compiler warnings for input and output buffers
  */
 
 #include <stdio.h>
@@ -15,6 +17,14 @@
 #include <assert.h>
 #include "zlib.h"
 
+#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
+#  include <fcntl.h>
+#  include <io.h>
+#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#else
+#  define SET_BINARY_MODE(file)
+#endif
+
 #define CHUNK 16384
 
 /* Compress from file source to file dest until EOF on source.
@@ -28,8 +38,8 @@ int def(FILE *source, FILE *dest, int level)
     int ret, flush;
     unsigned have;
     z_stream strm;
-    char in[CHUNK];
-    char out[CHUNK];
+    unsigned char in[CHUNK];
+    unsigned char out[CHUNK];
 
     /* allocate deflate state */
     strm.zalloc = Z_NULL;
@@ -84,8 +94,8 @@ int inf(FILE *source, FILE *dest)
     int ret;
     unsigned have;
     z_stream strm;
-    char in[CHUNK];
-    char out[CHUNK];
+    unsigned char in[CHUNK];
+    unsigned char out[CHUNK];
 
     /* allocate inflate state */
     strm.zalloc = Z_NULL;
@@ -167,6 +177,10 @@ int main(int argc, char **argv)
 {
     int ret;
 
+    /* avoid end-of-line conversions */
+    SET_BINARY_MODE(stdin);
+    SET_BINARY_MODE(stdout);
+
     /* do compression if no arguments */
     if (argc == 1) {
         ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION);
diff --git a/examples/zran.c b/examples/zran.c
index 8c7717e..617a130 100644
--- a/examples/zran.c
+++ b/examples/zran.c
@@ -351,7 +351,7 @@ int main(int argc, char **argv)
     int len;
     off_t offset;
     FILE *in;
-    struct access *index;
+    struct access *index = NULL;
     unsigned char buf[CHUNK];
 
     /* open input file */
diff --git a/gzio.c b/gzio.c
index 7e90f49..a8130ef 100644
--- a/gzio.c
+++ b/gzio.c
@@ -1,5 +1,5 @@
 /* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2006 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
@@ -7,9 +7,8 @@
 
 /* @(#) $Id$ */
 
-#include <stdio.h>
-
 #include "zutil.h"
+#include <stdio.h>
 
 #ifdef NO_DEFLATE       /* for compatibility with old definition */
 #  define NO_GZCOMPRESS
@@ -187,7 +186,10 @@ local gzFile gz_open (path, mode, fd)
         /* Write a very simple .gz header:
          */
         fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
-             Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
+             Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, level == 9 ? 2 :
+                            (strategy >= Z_HUFFMAN_ONLY ||
+                             (level != Z_DEFAULT_COMPRESSION && level < 2) ?
+                             4 : 0) /*xflags*/, OS_CODE);
         s->start = 10L;
         /* We use 10L instead of ftell(s->file) to because ftell causes an
          * fflush on some systems. This version of the library doesn't use
@@ -256,7 +258,7 @@ int ZEXPORT gzsetparams (file, level, strategy)
 /* ===========================================================================
      Read a byte from a gz_stream; update next_in and avail_in. Return EOF
    for end of file.
-   IN assertion: the stream s has been sucessfully opened for reading.
+   IN assertion: the stream s has been successfully opened for reading.
 */
 local int get_byte(s)
     gz_stream *s;
@@ -281,7 +283,7 @@ local int get_byte(s)
     mode to transparent if the gzip magic header is not present; set s->err
     to Z_DATA_ERROR if the magic header is present but the rest of the header
     is incorrect.
-    IN assertion: the stream s has already been created sucessfully;
+    IN assertion: the stream s has already been created successfully;
        s->stream.avail_in is zero for the first time, but may be non-zero
        for concatenated .gz files.
 */
@@ -301,6 +303,7 @@ local void check_header(s)
         if (len) s->inbuf[0] = s->stream.next_in[0];
         errno = 0;
         len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
+        if (len == 0) s->z_eof = 1;
         if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
         s->stream.avail_in += len;
         s->stream.next_in = s->inbuf;
@@ -436,7 +439,7 @@ int ZEXPORT gzread (file, buf, len)
                 s->stream.avail_out -= n;
                 s->stream.avail_in  -= n;
             }
-            if (s->stream.avail_out > 0) {
+            if (s->stream.avail_out > 0 && !feof(s->file)) {
                 s->stream.avail_out -=
                     (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
             }
@@ -971,7 +974,7 @@ int ZEXPORT gzclose (file)
     return destroy((gz_stream*)file);
 }
 
-#ifdef STDC
+#if defined(STDC) && !defined(_WIN32_WCE)
 #  define zstrerror(errnum) strerror(errnum)
 #else
 #  define zstrerror(errnum) ""
diff --git a/inflate.h b/inflate.h
index 07bd3e7..d90c6bc 100644
--- a/inflate.h
+++ b/inflate.h
@@ -1,5 +1,5 @@
 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2004 Mark Adler
+ * Copyright (C) 1995-2006 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -73,7 +73,7 @@ typedef enum {
         CHECK -> LENGTH -> DONE
  */
 
-/* state maintained between inflate() calls.  Approximately 7K bytes. */
+/* state maintained between inflate() calls.  Approximately 10K bytes. */
 struct inflate_state {
     inflate_mode mode;          /* current inflate mode */
     int last;                   /* true if processing last block */
diff --git a/inftrees.c b/inftrees.c
index 8a9c13f..b69a1f9 100644
--- a/inftrees.c
+++ b/inftrees.c
@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate_copyright[] =
-   " inflate 1.2.3 Copyright 1995-2005 Mark Adler ";
+   " inflate 1.2.3.1 Copyright 1995-2005 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -62,7 +62,7 @@ unsigned short FAR *work;
         35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
     static const unsigned short lext[31] = { /* Length codes 257..285 extra */
         16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 74, 196};
     static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
         1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
         257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
diff --git a/make_vms.com b/make_vms.com
index c2a1fb5..aa4e461 100644
--- a/make_vms.com
+++ b/make_vms.com
@@ -1,6 +1,15 @@
 $! make libz under VMS written by
 $! Martin P.J. Zinser
-$! <zinser@zinser.no-ip.info or zinser@sysdev.deutsche-boerse.com>
+$!
+$! In case of problems with the install you might contact me at
+$! zinser@zinser.no-ip.info(preferred) or
+$! zinser@sysdev.deutsche-boerse.com (work)
+$!
+$! Make procedure history for Zlib
+$!
+$!------------------------------------------------------------------------------
+$! Version history
+$! 0.01 20060120 First version to receive a number
 $!
 $ on error then goto err_exit
 $!
@@ -10,7 +19,10 @@ $!
 $ true  = 1
 $ false = 0
 $ tmpnam = "temp_" + f$getjpi("","pid")
-$ SAY = "WRITE SYS$OUTPUT"
+$ its_decc = false
+$ its_vaxc = false
+$ its_gnuc = false
+$ s_case   = False
 $!
 $! Setup variables holding "config" information
 $!
@@ -21,13 +33,11 @@ $ v_string = "ZLIB_VERSION"
 $ v_file   = "zlib.h"
 $ ccopt    = ""
 $ lopts    = ""
+$ dnsrl   = ""
 $ linkonly = false
 $ optfile  = name + ".opt"
-$ its_decc = false
-$ its_vaxc = false
-$ its_gnuc = false
 $ axp      = f$getsyi("HW_MODEL").ge.1024
-$ s_case   = false
+$!
 $! Check for MMK/MMS
 $!
 $ If F$Search ("Sys$System:MMS.EXE") .nes. "" Then Make = "MMS"
@@ -107,7 +117,7 @@ $     call make minigzip.exe -
 $   endif
 $  else
 $   gosub crea_mms
-$   SAY "Make ''name' ''version' with ''Make' "
+$   write sys$output "Make ''name' ''version' with ''Make' "
 $   'make'
 $  endif
 $!
@@ -133,6 +143,7 @@ $ write sys$output "C compiler required to build ''name'"
 $ goto err_exit
 $ERR_EXIT:
 $ set message/facil/ident/sever/text
+$ close/nolog optf
 $ write sys$output "Exiting..."
 $ exit 2
 $!
@@ -244,6 +255,9 @@ $!------------------------------------------------------------------------------
 $!
 $! Look for the compiler used
 $!
+$! Version history
+$! 0.01 20040223 First version to receive a number
+$! 0.02 20040229 Save/set value of decc$no_rooted_search_lists
 $CHECK_COMPILER:
 $ if (.not. (its_decc .or. its_vaxc .or. its_gnuc))
 $ then
@@ -257,9 +271,20 @@ $!
 $ if (.not. (its_decc .or. its_vaxc .or. its_gnuc))
 $ then goto CC_ERR
 $ else
-$   if its_decc then write sys$output "CC compiler check ... Compaq C"
-$   if its_vaxc then write sys$output "CC compiler check ... VAX C"
-$   if its_gnuc then write sys$output "CC compiler check ... GNU C"
+$   if its_decc
+$   then
+$     write sys$output "CC compiler check ... Compaq C"
+$     if f$trnlnm("decc$no_rooted_search_lists") .nes. ""
+$     then
+$       dnrsl = f$trnlnm("decc$no_rooted_search_lists")
+$     endif
+$     define decc$no_rooted_search_lists 1
+$   else
+$     if its_vaxc then write sys$output "CC compiler check ... VAX C"
+$     if its_gnuc then write sys$output "CC compiler check ... GNU C"
+$     if f$trnlnm(topt) then write topt "sys$share:vaxcrtl.exe/share"
+$     if f$trnlnm(optf) then write optf "sys$share:vaxcrtl.exe/share"
+$   endif
 $ endif
 $ return
 $!------------------------------------------------------------------------------
@@ -382,17 +407,23 @@ $ close h_in
 $ return
 $!------------------------------------------------------------------------------
 $!
-$! Analyze Object files for OpenVMS AXP to extract Procedure and Data
+$! Analyze Object files for OpenVMS AXP to extract Procedure and Data 
 $! information to build a symbol vector for a shareable image
 $! All the "brains" of this logic was suggested by Hartmut Becker
 $! (Hartmut.Becker@compaq.com). All the bugs were introduced by me
-$! (zinser@decus.de), so if you do have problem reports please do not
+$! (zinser@zinser.no-ip.info), so if you do have problem reports please do not
 $! bother Hartmut/HP, but get in touch with me
 $!
-$ ANAL_OBJ_AXP: Subroutine
+$! Version history
+$! 0.01 20040406 Skip over shareable images in option file
+$! 0.02 20041109 Fix option file for shareable images with case_sensitive=YES
+$! 0.03 20050107 Skip over Identification labels in option file
+$! 0.04 20060117 Add uppercase alias to code compiled with /name=as_is
+$!
+$ ANAL_OBJ_AXP: Subroutine   
 $ V = 'F$Verify(0)
 $ SAY := "WRITE_ SYS$OUTPUT"
-$
+$ 
 $ IF F$SEARCH("''P1'") .EQS. ""
 $ THEN
 $    SAY "ANAL_OBJ_AXP-E-NOSUCHFILE:  Error, inputfile ''p1' not available"
@@ -409,6 +440,17 @@ $ create a.tmp
 $ open/append atmp a.tmp
 $ loop:
 $ read/end=end_loop in line
+$ if f$locate("/SHARE",f$edit(line,"upcase")) .lt. f$length(line)
+$ then
+$   write sys$output "ANAL_SKP_SHR-i-skipshare, ''line'"
+$   goto loop
+$ endif
+$ if f$locate("IDENTIFICATION=",f$edit(line,"upcase")) .lt. f$length(line)
+$ then
+$   write sys$output "ANAL_OBJ_AXP-i-ident: Identification ", -
+                     f$element(1,"=",line)
+$   goto loop
+$ endif
 $ f= f$search(line)
 $ if f .eqs. ""
 $ then
@@ -450,12 +492,35 @@ $ edito/edt/command=sys$input f.tmp
 sub/symbol: "/symbol_vector=(/whole
 sub/"/=DATA)/whole
 exit
-$ sort/nodupl d.tmp,f.tmp 'p2'
-$ delete a.tmp;*,b.tmp;*,c.tmp;*,d.tmp;*,e.tmp;*,f.tmp;*
+$ sort/nodupl d.tmp,f.tmp g.tmp
+$ open/read raw_vector g.tmp
+$ open/write case_vector 'p2'
+$ RAWLOOP:
+$ read/end=end_rawloop raw_vector raw_element
+$ write case_vector raw_element
+$ if f$locate("=PROCEDURE)",raw_element) .lt. f$length(raw_element)
+$ then
+$     name = f$element(1,"=",raw_element) - "("
+$     if f$edit(name,"UPCASE") .nes. name then -
+          write case_vector f$fao(" symbol_vector=(!AS/!AS=PROCEDURE)", - 
+                                  f$edit(name,"UPCASE"), name) 
+$ endif
+$ if f$locate("=DATA)",raw_element) .lt. f$length(raw_element)
+$ then
+$     name = f$element(1,"=",raw_element) - "("
+$     if f$edit(name,"UPCASE") .nes. name then -
+          write case_vector f$fao(" symbol_vector=(!AS/!AS=DATA)", - 
+                                  f$edit(name,"UPCASE"), name) 
+$ endif
+$ goto rawloop
+$ END_RAWLOOP:
+$ close raw_vector
+$ close case_vector
+$ delete a.tmp;*,b.tmp;*,c.tmp;*,d.tmp;*,e.tmp;*,f.tmp;*,g.tmp;*
 $ if f$search("x.tmp") .nes. "" -
         then $ delete x.tmp;*
 $!
 $ EXIT_AA:
 $ if V then set verify
-$ endsubroutine
+$ endsubroutine 
 $!------------------------------------------------------------------------------
diff --git a/minigzip.c b/minigzip.c
index 4524b96..79bafa4 100644
--- a/minigzip.c
+++ b/minigzip.c
@@ -1,5 +1,5 @@
 /* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2006 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -15,8 +15,8 @@
 
 /* @(#) $Id$ */
 
-#include <stdio.h>
 #include "zlib.h"
+#include <stdio.h>
 
 #ifdef STDC
 #  include <string.h>
diff --git a/projects/visualc6/example.dsp b/projects/visualc6/example.dsp
index e072a37..f713efd 100644
--- a/projects/visualc6/example.dsp
+++ b/projects/visualc6/example.dsp
@@ -17,14 +17,14 @@ CFG=example - Win32 LIB Debug
 !MESSAGE 

 !MESSAGE Possible choices for configuration are:

 !MESSAGE 

-!MESSAGE "example - Win32 DLL Release" (based on "Win32 (x86) Console Application")

-!MESSAGE "example - Win32 DLL Debug" (based on "Win32 (x86) Console Application")

 !MESSAGE "example - Win32 DLL ASM Release" (based on "Win32 (x86) Console Application")

 !MESSAGE "example - Win32 DLL ASM Debug" (based on "Win32 (x86) Console Application")

-!MESSAGE "example - Win32 LIB Release" (based on "Win32 (x86) Console Application")

-!MESSAGE "example - Win32 LIB Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE "example - Win32 DLL Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "example - Win32 DLL Debug" (based on "Win32 (x86) Console Application")

 !MESSAGE "example - Win32 LIB ASM Release" (based on "Win32 (x86) Console Application")

 !MESSAGE "example - Win32 LIB ASM Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE "example - Win32 LIB Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "example - Win32 LIB Debug" (based on "Win32 (x86) Console Application")

 !MESSAGE 

 

 # Begin Project

@@ -34,22 +34,22 @@ CFG=example - Win32 LIB Debug
 CPP=cl.exe

 RSC=rc.exe

 

-!IF  "$(CFG)" == "example - Win32 DLL Release"

+!IF  "$(CFG)" == "example - Win32 DLL ASM Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "example___Win32_DLL_Release"

-# PROP BASE Intermediate_Dir "example___Win32_DLL_Release"

+# PROP BASE Output_Dir "example___Win32_DLL_ASM_Release"

+# PROP BASE Intermediate_Dir "example___Win32_DLL_ASM_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_DLL_Release"

-# PROP Intermediate_Dir "Win32_DLL_Release"

+# PROP Output_Dir "Win32_DLL_ASM_Release"

+# PROP Intermediate_Dir "Win32_DLL_ASM_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -60,22 +60,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "example - Win32 DLL Debug"

+!ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "example___Win32_DLL_Debug"

-# PROP BASE Intermediate_Dir "example___Win32_DLL_Debug"

+# PROP BASE Output_Dir "example___Win32_DLL_ASM_Debug"

+# PROP BASE Intermediate_Dir "example___Win32_DLL_ASM_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_DLL_Debug"

-# PROP Intermediate_Dir "Win32_DLL_Debug"

+# PROP Output_Dir "Win32_DLL_ASM_Debug"

+# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -86,22 +86,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 # ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Release"

+!ELSEIF  "$(CFG)" == "example - Win32 DLL Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "example___Win32_DLL_ASM_Release"

-# PROP BASE Intermediate_Dir "example___Win32_DLL_ASM_Release"

+# PROP BASE Output_Dir "example___Win32_DLL_Release"

+# PROP BASE Intermediate_Dir "example___Win32_DLL_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_DLL_ASM_Release"

-# PROP Intermediate_Dir "Win32_DLL_ASM_Release"

+# PROP Output_Dir "Win32_DLL_Release"

+# PROP Intermediate_Dir "Win32_DLL_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -112,22 +112,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Debug"

+!ELSEIF  "$(CFG)" == "example - Win32 DLL Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "example___Win32_DLL_ASM_Debug"

-# PROP BASE Intermediate_Dir "example___Win32_DLL_ASM_Debug"

+# PROP BASE Output_Dir "example___Win32_DLL_Debug"

+# PROP BASE Intermediate_Dir "example___Win32_DLL_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_DLL_ASM_Debug"

-# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"

+# PROP Output_Dir "Win32_DLL_Debug"

+# PROP Intermediate_Dir "Win32_DLL_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -138,22 +138,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 # ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "example - Win32 LIB Release"

+!ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "example___Win32_LIB_Release"

-# PROP BASE Intermediate_Dir "example___Win32_LIB_Release"

+# PROP BASE Output_Dir "example___Win32_LIB_ASM_Release"

+# PROP BASE Intermediate_Dir "example___Win32_LIB_ASM_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_LIB_Release"

-# PROP Intermediate_Dir "Win32_LIB_Release"

+# PROP Output_Dir "Win32_LIB_ASM_Release"

+# PROP Intermediate_Dir "Win32_LIB_ASM_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -164,22 +164,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "example - Win32 LIB Debug"

+!ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "example___Win32_LIB_Debug"

-# PROP BASE Intermediate_Dir "example___Win32_LIB_Debug"

+# PROP BASE Output_Dir "example___Win32_LIB_ASM_Debug"

+# PROP BASE Intermediate_Dir "example___Win32_LIB_ASM_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_LIB_Debug"

-# PROP Intermediate_Dir "Win32_LIB_Debug"

+# PROP Output_Dir "Win32_LIB_ASM_Debug"

+# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -190,22 +190,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 # ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Release"

+!ELSEIF  "$(CFG)" == "example - Win32 LIB Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "example___Win32_LIB_ASM_Release"

-# PROP BASE Intermediate_Dir "example___Win32_LIB_ASM_Release"

+# PROP BASE Output_Dir "example___Win32_LIB_Release"

+# PROP BASE Intermediate_Dir "example___Win32_LIB_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_LIB_ASM_Release"

-# PROP Intermediate_Dir "Win32_LIB_ASM_Release"

+# PROP Output_Dir "Win32_LIB_Release"

+# PROP Intermediate_Dir "Win32_LIB_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -216,22 +216,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Debug"

+!ELSEIF  "$(CFG)" == "example - Win32 LIB Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "example___Win32_LIB_ASM_Debug"

-# PROP BASE Intermediate_Dir "example___Win32_LIB_ASM_Debug"

+# PROP BASE Output_Dir "example___Win32_LIB_Debug"

+# PROP BASE Intermediate_Dir "example___Win32_LIB_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_LIB_ASM_Debug"

-# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"

+# PROP Output_Dir "Win32_LIB_Debug"

+# PROP Intermediate_Dir "Win32_LIB_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -246,14 +246,14 @@ LINK32=link.exe
 

 # Begin Target

 

-# Name "example - Win32 DLL Release"

-# Name "example - Win32 DLL Debug"

 # Name "example - Win32 DLL ASM Release"

 # Name "example - Win32 DLL ASM Debug"

-# Name "example - Win32 LIB Release"

-# Name "example - Win32 LIB Debug"

+# Name "example - Win32 DLL Release"

+# Name "example - Win32 DLL Debug"

 # Name "example - Win32 LIB ASM Release"

 # Name "example - Win32 LIB ASM Debug"

+# Name "example - Win32 LIB Release"

+# Name "example - Win32 LIB Debug"

 # Begin Group "Source Files"

 

 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

diff --git a/projects/visualc6/minigzip.dsp b/projects/visualc6/minigzip.dsp
index f32024e..c50b488 100644
--- a/projects/visualc6/minigzip.dsp
+++ b/projects/visualc6/minigzip.dsp
@@ -17,14 +17,14 @@ CFG=minigzip - Win32 LIB Debug
 !MESSAGE 

 !MESSAGE Possible choices for configuration are:

 !MESSAGE 

-!MESSAGE "minigzip - Win32 DLL Release" (based on "Win32 (x86) Console Application")

-!MESSAGE "minigzip - Win32 DLL Debug" (based on "Win32 (x86) Console Application")

 !MESSAGE "minigzip - Win32 DLL ASM Release" (based on "Win32 (x86) Console Application")

 !MESSAGE "minigzip - Win32 DLL ASM Debug" (based on "Win32 (x86) Console Application")

-!MESSAGE "minigzip - Win32 LIB Release" (based on "Win32 (x86) Console Application")

-!MESSAGE "minigzip - Win32 LIB Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE "minigzip - Win32 DLL Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "minigzip - Win32 DLL Debug" (based on "Win32 (x86) Console Application")

 !MESSAGE "minigzip - Win32 LIB ASM Release" (based on "Win32 (x86) Console Application")

 !MESSAGE "minigzip - Win32 LIB ASM Debug" (based on "Win32 (x86) Console Application")

+!MESSAGE "minigzip - Win32 LIB Release" (based on "Win32 (x86) Console Application")

+!MESSAGE "minigzip - Win32 LIB Debug" (based on "Win32 (x86) Console Application")

 !MESSAGE 

 

 # Begin Project

@@ -34,22 +34,22 @@ CFG=minigzip - Win32 LIB Debug
 CPP=cl.exe

 RSC=rc.exe

 

-!IF  "$(CFG)" == "minigzip - Win32 DLL Release"

+!IF  "$(CFG)" == "minigzip - Win32 DLL ASM Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "minigzip___Win32_DLL_Release"

-# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_Release"

+# PROP BASE Output_Dir "minigzip___Win32_DLL_ASM_Release"

+# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_ASM_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_DLL_Release"

-# PROP Intermediate_Dir "Win32_DLL_Release"

+# PROP Output_Dir "Win32_DLL_ASM_Release"

+# PROP Intermediate_Dir "Win32_DLL_ASM_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -60,22 +60,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL Debug"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "minigzip___Win32_DLL_Debug"

-# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_Debug"

+# PROP BASE Output_Dir "minigzip___Win32_DLL_ASM_Debug"

+# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_ASM_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_DLL_Debug"

-# PROP Intermediate_Dir "Win32_DLL_Debug"

+# PROP Output_Dir "Win32_DLL_ASM_Debug"

+# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -86,22 +86,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 # ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Release"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "minigzip___Win32_DLL_ASM_Release"

-# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_ASM_Release"

+# PROP BASE Output_Dir "minigzip___Win32_DLL_Release"

+# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_DLL_ASM_Release"

-# PROP Intermediate_Dir "Win32_DLL_ASM_Release"

+# PROP Output_Dir "Win32_DLL_Release"

+# PROP Intermediate_Dir "Win32_DLL_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -112,22 +112,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Debug"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 DLL Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "minigzip___Win32_DLL_ASM_Debug"

-# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_ASM_Debug"

+# PROP BASE Output_Dir "minigzip___Win32_DLL_Debug"

+# PROP BASE Intermediate_Dir "minigzip___Win32_DLL_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_DLL_ASM_Debug"

-# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"

+# PROP Output_Dir "Win32_DLL_Debug"

+# PROP Intermediate_Dir "Win32_DLL_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -138,22 +138,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 # ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Release"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "minigzip___Win32_LIB_Release"

-# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_Release"

+# PROP BASE Output_Dir "minigzip___Win32_LIB_ASM_Release"

+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_ASM_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_LIB_Release"

-# PROP Intermediate_Dir "Win32_LIB_Release"

+# PROP Output_Dir "Win32_LIB_ASM_Release"

+# PROP Intermediate_Dir "Win32_LIB_ASM_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -164,22 +164,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Debug"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "minigzip___Win32_LIB_Debug"

-# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_Debug"

+# PROP BASE Output_Dir "minigzip___Win32_LIB_ASM_Debug"

+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_ASM_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_LIB_Debug"

-# PROP Intermediate_Dir "Win32_LIB_Debug"

+# PROP Output_Dir "Win32_LIB_ASM_Debug"

+# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -190,22 +190,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 # ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Release"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "minigzip___Win32_LIB_ASM_Release"

-# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_ASM_Release"

+# PROP BASE Output_Dir "minigzip___Win32_LIB_Release"

+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_LIB_ASM_Release"

-# PROP Intermediate_Dir "Win32_LIB_ASM_Release"

+# PROP Output_Dir "Win32_LIB_Release"

+# PROP Intermediate_Dir "Win32_LIB_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

 # ADD RSC /l 0x409 /d "NDEBUG"

@@ -216,22 +216,22 @@ LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386

 # ADD LINK32 /nologo /subsystem:console /machine:I386

 

-!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Debug"

+!ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "minigzip___Win32_LIB_ASM_Debug"

-# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_ASM_Debug"

+# PROP BASE Output_Dir "minigzip___Win32_LIB_Debug"

+# PROP BASE Intermediate_Dir "minigzip___Win32_LIB_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_LIB_ASM_Debug"

-# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"

+# PROP Output_Dir "Win32_LIB_Debug"

+# PROP Intermediate_Dir "Win32_LIB_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

 # ADD RSC /l 0x409 /d "_DEBUG"

@@ -246,14 +246,14 @@ LINK32=link.exe
 

 # Begin Target

 

-# Name "minigzip - Win32 DLL Release"

-# Name "minigzip - Win32 DLL Debug"

 # Name "minigzip - Win32 DLL ASM Release"

 # Name "minigzip - Win32 DLL ASM Debug"

-# Name "minigzip - Win32 LIB Release"

-# Name "minigzip - Win32 LIB Debug"

+# Name "minigzip - Win32 DLL Release"

+# Name "minigzip - Win32 DLL Debug"

 # Name "minigzip - Win32 LIB ASM Release"

 # Name "minigzip - Win32 LIB ASM Debug"

+# Name "minigzip - Win32 LIB Release"

+# Name "minigzip - Win32 LIB Debug"

 # Begin Group "Source Files"

 

 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

diff --git a/projects/visualc6/zlib.dsp b/projects/visualc6/zlib.dsp
index 0fe0604..1e5c499 100644
--- a/projects/visualc6/zlib.dsp
+++ b/projects/visualc6/zlib.dsp
@@ -18,14 +18,14 @@ CFG=zlib - Win32 LIB Debug
 !MESSAGE 

 !MESSAGE Possible choices for configuration are:

 !MESSAGE 

-!MESSAGE "zlib - Win32 DLL Release" (based on "Win32 (x86) Dynamic-Link Library")

-!MESSAGE "zlib - Win32 DLL Debug" (based on "Win32 (x86) Dynamic-Link Library")

 !MESSAGE "zlib - Win32 DLL ASM Release" (based on "Win32 (x86) Dynamic-Link Library")

 !MESSAGE "zlib - Win32 DLL ASM Debug" (based on "Win32 (x86) Dynamic-Link Library")

-!MESSAGE "zlib - Win32 LIB Release" (based on "Win32 (x86) Static Library")

-!MESSAGE "zlib - Win32 LIB Debug" (based on "Win32 (x86) Static Library")

+!MESSAGE "zlib - Win32 DLL Release" (based on "Win32 (x86) Dynamic-Link Library")

+!MESSAGE "zlib - Win32 DLL Debug" (based on "Win32 (x86) Dynamic-Link Library")

 !MESSAGE "zlib - Win32 LIB ASM Release" (based on "Win32 (x86) Static Library")

 !MESSAGE "zlib - Win32 LIB ASM Debug" (based on "Win32 (x86) Static Library")

+!MESSAGE "zlib - Win32 LIB Release" (based on "Win32 (x86) Static Library")

+!MESSAGE "zlib - Win32 LIB Debug" (based on "Win32 (x86) Static Library")

 !MESSAGE 

 

 # Begin Project

@@ -33,23 +33,23 @@ CFG=zlib - Win32 LIB Debug
 # PROP Scc_ProjName ""

 # PROP Scc_LocalPath ""

 

-!IF  "$(CFG)" == "zlib - Win32 DLL Release"

+!IF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "zlib___Win32_DLL_Release"

-# PROP BASE Intermediate_Dir "zlib___Win32_DLL_Release"

+# PROP BASE Output_Dir "zlib___Win32_DLL_ASM_Release"

+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_ASM_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_DLL_Release"

-# PROP Intermediate_Dir "Win32_DLL_Release"

+# PROP Output_Dir "Win32_DLL_ASM_Release"

+# PROP Intermediate_Dir "Win32_DLL_ASM_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /D "ASMV" /D "ASMINF" /FD /c

 # SUBTRACT CPP /YX /Yc /Yu

 MTL=midl.exe

 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32

@@ -62,25 +62,25 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo

 LINK32=link.exe

 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386

-# ADD LINK32 /nologo /dll /machine:I386 /out:"Win32_DLL_Release\zlib1.dll"

+# ADD LINK32 /nologo /dll /machine:I386 /out:"Win32_DLL_ASM_Release\zlib1.dll"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "zlib___Win32_DLL_Debug"

-# PROP BASE Intermediate_Dir "zlib___Win32_DLL_Debug"

+# PROP BASE Output_Dir "zlib___Win32_DLL_ASM_Debug"

+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_ASM_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_DLL_Debug"

-# PROP Intermediate_Dir "Win32_DLL_Debug"

+# PROP Output_Dir "Win32_DLL_ASM_Debug"

+# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /D "ASMV" /D "ASMINF" /FR /FD /GZ /c

 # SUBTRACT CPP /YX /Yc /Yu

 MTL=midl.exe

 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32

@@ -93,25 +93,25 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo

 LINK32=link.exe

 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept

-# ADD LINK32 /nologo /dll /debug /machine:I386 /out:"Win32_DLL_Debug\zlib1d.dll" /pdbtype:sept

+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:"Win32_DLL_ASM_Debug\zlib1d.dll" /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "zlib___Win32_DLL_ASM_Release"

-# PROP BASE Intermediate_Dir "zlib___Win32_DLL_ASM_Release"

+# PROP BASE Output_Dir "zlib___Win32_DLL_Release"

+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_DLL_ASM_Release"

-# PROP Intermediate_Dir "Win32_DLL_ASM_Release"

+# PROP Output_Dir "Win32_DLL_Release"

+# PROP Intermediate_Dir "Win32_DLL_Release"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "ASMV" /D "ASMINF" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX /Yc /Yu

 MTL=midl.exe

 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32

@@ -124,25 +124,25 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo

 LINK32=link.exe

 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386

-# ADD LINK32 /nologo /dll /machine:I386 /out:"Win32_DLL_ASM_Release\zlib1.dll"

+# ADD LINK32 /nologo /dll /machine:I386 /out:"Win32_DLL_Release\zlib1.dll"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "zlib___Win32_DLL_ASM_Debug"

-# PROP BASE Intermediate_Dir "zlib___Win32_DLL_ASM_Debug"

+# PROP BASE Output_Dir "zlib___Win32_DLL_Debug"

+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_DLL_ASM_Debug"

-# PROP Intermediate_Dir "Win32_DLL_ASM_Debug"

+# PROP Output_Dir "Win32_DLL_Debug"

+# PROP Intermediate_Dir "Win32_DLL_Debug"

 # PROP Ignore_Export_Lib 0

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /D "ASMV" /D "ASMINF" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX /Yc /Yu

 MTL=midl.exe

 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32

@@ -155,24 +155,24 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo

 LINK32=link.exe

 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept

-# ADD LINK32 /nologo /dll /debug /machine:I386 /out:"Win32_DLL_ASM_Debug\zlib1d.dll" /pdbtype:sept

+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:"Win32_DLL_Debug\zlib1d.dll" /pdbtype:sept

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "zlib___Win32_LIB_Release"

-# PROP BASE Intermediate_Dir "zlib___Win32_LIB_Release"

+# PROP BASE Output_Dir "zlib___Win32_LIB_ASM_Release"

+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_ASM_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_LIB_Release"

-# PROP Intermediate_Dir "Win32_LIB_Release"

+# PROP Output_Dir "Win32_LIB_ASM_Release"

+# PROP Intermediate_Dir "Win32_LIB_ASM_Release"

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /D "ASMV" /D "ASMINF" /FD /c

 # SUBTRACT CPP /YX /Yc /Yu

 RSC=rc.exe

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

@@ -184,22 +184,22 @@ LIB32=link.exe -lib
 # ADD BASE LIB32 /nologo

 # ADD LIB32 /nologo

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "zlib___Win32_LIB_Debug"

-# PROP BASE Intermediate_Dir "zlib___Win32_LIB_Debug"

+# PROP BASE Output_Dir "zlib___Win32_LIB_ASM_Debug"

+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_ASM_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_LIB_Debug"

-# PROP Intermediate_Dir "Win32_LIB_Debug"

+# PROP Output_Dir "Win32_LIB_ASM_Debug"

+# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /D "ASMV" /D "ASMINF" /FR /FD /GZ /c

 # SUBTRACT CPP /YX /Yc /Yu

 RSC=rc.exe

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

@@ -209,24 +209,24 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo

 LIB32=link.exe -lib

 # ADD BASE LIB32 /nologo

-# ADD LIB32 /nologo /out:"Win32_LIB_Debug\zlibd.lib"

+# ADD LIB32 /nologo /out:"Win32_LIB_ASM_Debug\zlibd.lib"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 0

-# PROP BASE Output_Dir "zlib___Win32_LIB_ASM_Release"

-# PROP BASE Intermediate_Dir "zlib___Win32_LIB_ASM_Release"

+# PROP BASE Output_Dir "zlib___Win32_LIB_Release"

+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_Release"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 0

-# PROP Output_Dir "Win32_LIB_ASM_Release"

-# PROP Intermediate_Dir "Win32_LIB_ASM_Release"

+# PROP Output_Dir "Win32_LIB_Release"

+# PROP Intermediate_Dir "Win32_LIB_Release"

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "ASMV" /D "ASMINF" /FD /c

+# ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "NDEBUG" /FD /c

 # SUBTRACT CPP /YX /Yc /Yu

 RSC=rc.exe

 # ADD BASE RSC /l 0x409 /d "NDEBUG"

@@ -238,22 +238,22 @@ LIB32=link.exe -lib
 # ADD BASE LIB32 /nologo

 # ADD LIB32 /nologo

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

 

 # PROP BASE Use_MFC 0

 # PROP BASE Use_Debug_Libraries 1

-# PROP BASE Output_Dir "zlib___Win32_LIB_ASM_Debug"

-# PROP BASE Intermediate_Dir "zlib___Win32_LIB_ASM_Debug"

+# PROP BASE Output_Dir "zlib___Win32_LIB_Debug"

+# PROP BASE Intermediate_Dir "zlib___Win32_LIB_Debug"

 # PROP BASE Target_Dir ""

 # PROP Use_MFC 0

 # PROP Use_Debug_Libraries 1

-# PROP Output_Dir "Win32_LIB_ASM_Debug"

-# PROP Intermediate_Dir "Win32_LIB_ASM_Debug"

+# PROP Output_Dir "Win32_LIB_Debug"

+# PROP Intermediate_Dir "Win32_LIB_Debug"

 # PROP Target_Dir ""

 CPP=cl.exe

 # ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c

 # SUBTRACT BASE CPP /YX /Yc /Yu

-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /D "ASMV" /D "ASMINF" /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /D "_DEBUG" /FR /FD /GZ /c

 # SUBTRACT CPP /YX /Yc /Yu

 RSC=rc.exe

 # ADD BASE RSC /l 0x409 /d "_DEBUG"

@@ -263,20 +263,20 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo

 LIB32=link.exe -lib

 # ADD BASE LIB32 /nologo

-# ADD LIB32 /nologo /out:"Win32_LIB_ASM_Debug\zlibd.lib"

+# ADD LIB32 /nologo /out:"Win32_LIB_Debug\zlibd.lib"

 

 !ENDIF 

 

 # Begin Target

 

-# Name "zlib - Win32 DLL Release"

-# Name "zlib - Win32 DLL Debug"

 # Name "zlib - Win32 DLL ASM Release"

 # Name "zlib - Win32 DLL ASM Debug"

-# Name "zlib - Win32 LIB Release"

-# Name "zlib - Win32 LIB Debug"

+# Name "zlib - Win32 DLL Release"

+# Name "zlib - Win32 DLL Debug"

 # Name "zlib - Win32 LIB ASM Release"

 # Name "zlib - Win32 LIB ASM Debug"

+# Name "zlib - Win32 LIB Release"

+# Name "zlib - Win32 LIB Debug"

 # Begin Group "Source Files"

 

 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

@@ -328,27 +328,27 @@ SOURCE=..\..\uncompr.c
 

 SOURCE=..\..\win32\zlib.def

 

-!IF  "$(CFG)" == "zlib - Win32 DLL Release"

+!IF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Release"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"

 

 # PROP Exclude_From_Build 1

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"

 

 # PROP Exclude_From_Build 1

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

 

 # PROP Exclude_From_Build 1

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

 

 # PROP Exclude_From_Build 1

 

@@ -419,15 +419,7 @@ SOURCE=..\..\win32\zlib1.rc
 

 SOURCE=..\..\contrib\masmx86\gvmat32.asm

 

-!IF  "$(CFG)" == "zlib - Win32 DLL Release"

-

-# PROP Exclude_From_Build 1

-

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

-

-# PROP Exclude_From_Build 1

-

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

+!IF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

 

 # Begin Custom Build - Assembling...

 IntDir=.\Win32_DLL_ASM_Release

@@ -451,11 +443,11 @@ InputName=gvmat32
 

 # End Custom Build

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Release"

 

 # PROP Exclude_From_Build 1

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

 

 # PROP Exclude_From_Build 1

 

@@ -483,6 +475,14 @@ InputName=gvmat32
 

 # End Custom Build

 

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

+

+# PROP Exclude_From_Build 1

+

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

+

+# PROP Exclude_From_Build 1

+

 !ENDIF 

 

 # End Source File

@@ -490,7 +490,15 @@ InputName=gvmat32
 

 SOURCE=..\..\contrib\masmx86\gvmat32c.c

 

-!IF  "$(CFG)" == "zlib - Win32 DLL Release"

+!IF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

+

+# ADD CPP /I "..\.."

+

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"

+

+# ADD CPP /I "..\.."

+

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Release"

 

 # PROP Exclude_From_Build 1

 # ADD CPP /I "..\.."

@@ -500,11 +508,11 @@ SOURCE=..\..\contrib\masmx86\gvmat32c.c
 # PROP Exclude_From_Build 1

 # ADD CPP /I "..\.."

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"

 

 # ADD CPP /I "..\.."

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"

 

 # ADD CPP /I "..\.."

 

@@ -518,14 +526,6 @@ SOURCE=..\..\contrib\masmx86\gvmat32c.c
 # PROP Exclude_From_Build 1

 # ADD CPP /I "..\.."

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"

-

-# ADD CPP /I "..\.."

-

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"

-

-# ADD CPP /I "..\.."

-

 !ENDIF 

 

 # End Source File

@@ -533,15 +533,7 @@ SOURCE=..\..\contrib\masmx86\gvmat32c.c
 

 SOURCE=..\..\contrib\masmx86\inffas32.asm

 

-!IF  "$(CFG)" == "zlib - Win32 DLL Release"

-

-# PROP Exclude_From_Build 1

-

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

-

-# PROP Exclude_From_Build 1

-

-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

+!IF  "$(CFG)" == "zlib - Win32 DLL ASM Release"

 

 # Begin Custom Build - Assembling...

 IntDir=.\Win32_DLL_ASM_Release

@@ -565,11 +557,11 @@ InputName=inffas32
 

 # End Custom Build

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Release"

 

 # PROP Exclude_From_Build 1

 

-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"

 

 # PROP Exclude_From_Build 1

 

@@ -597,6 +589,14 @@ InputName=inffas32
 

 # End Custom Build

 

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"

+

+# PROP Exclude_From_Build 1

+

+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"

+

+# PROP Exclude_From_Build 1

+

 !ENDIF 

 

 # End Source File

diff --git a/qnx/package.qpg b/qnx/package.qpg
index 8a4a47c..bd93d05 100644
--- a/qnx/package.qpg
+++ b/qnx/package.qpg
@@ -25,10 +25,10 @@
       <QPG:Files>
          <QPG:Add file="../zconf.h" install="/opt/include/" user="root:sys" permission="644"/>
          <QPG:Add file="../zlib.h" install="/opt/include/" user="root:sys" permission="644"/>
-         <QPG:Add file="../libz.so.1.2.3" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.3"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.3"/>
-         <QPG:Add file="../libz.so.1.2.3" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.2.3.1" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.3.1"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.3.1"/>
+         <QPG:Add file="../libz.so.1.2.3.1" install="/opt/lib/" component="slib"/>
       </QPG:Files>
 
       <QPG:PackageFilter>
@@ -63,7 +63,7 @@
             </QPM:ProductDescription>
 
             <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.2.3</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.2.3.1</QPM:ReleaseVersion>
                <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
                <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
                <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
diff --git a/todo/Makefile-new b/todo/Makefile-new
new file mode 100644
index 0000000..8a09ebb
--- /dev/null
+++ b/todo/Makefile-new
@@ -0,0 +1,201 @@
+# Makefile for zlib
+# Copyright (C) 1995-2006 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile and test, type:
+#    ./configure; make test
+# The call of configure is optional if you don't have special requirements
+# If you wish to build zlib as a shared library, use: ./configure -s
+
+# To use the asm code, type:
+#    cp contrib/asm?86/match.S ./match.S
+#    make LOC=-DASMV OBJA=match.o
+
+# To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
+#    make install
+# To install in $HOME instead of /usr/local, use:
+#    make install prefix=$HOME
+
+CC=cc
+
+CFLAGS=-O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-g -DDEBUG
+#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+#           -Wstrict-prototypes -Wmissing-prototypes
+
+SFLAGS=$(CFLAGS)
+#SFLAGS=$(CFLAGS) -fPIC
+
+LD=$(CC)
+LDFLAGS=libz.a
+LDSHARED=$(CC)
+CPP=$(CC) -E
+
+STATICLIB=libz.a
+SHAREDLIB=libz.so
+SHAREDLIBV=libz.so.1.2.3
+SHAREDLIBM=libz.so.1
+EXE=
+
+LIBS=$(STATICLIB) $(SHAREDLIBV)
+
+AR=ar rc
+RANLIB=ranlib
+TAR=tar
+SHELL=/bin/sh
+
+prefix=/usr/local
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+mandir=${prefix}/share/man
+man3dir=${mandir}/man3
+pkgconfigdir = ${libdir}/pkgconfig
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+       zutil.o inflate.o infback.o inftrees.o inffast.o
+
+OBJA =
+#OBJA = match.o
+# to use the asm code: make OBJA=match.o
+
+TEST_OBJS = example.o minigzip.o
+
+OBJS_PIC = $(OBJS:.o=.pic.o)
+OBJA_PIC = $(OBJA:.o=.pic.o)
+
+.SUFFIXES: .c .o .pic.o
+
+.c.o:
+        $(CC) -c $(CFLAGS) -o $@ $*.c
+
+.c.pic.o:
+        $(CC) -c $(SFLAGS) -o $@ $*.c
+
+all: $(STATICLIB) example$(EXE) minigzip$(EXE)
+#all: $(STATICLIB) $(SHAREDLIBV) example$(EXE) minigzip$(EXE)
+
+check: test
+test: all
+        @LD_LIBRARY_PATH=.:$(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
+
+match.o: match.S
+        $(CPP) match.S > _match.s
+        $(CC) -c _match.s
+        mv _match.o match.o
+        rm -f _match.s
+
+match.pic.o: match.S
+        $(CPP) match.S > _match.s
+        $(CC) -c -fPIC _match.s
+        mv _match.o match.pic.o
+        rm -f _match.s
+
+$(STATICLIB): $(OBJS) $(OBJA)
+        $(AR) $@ $(OBJS) $(OBJA)
+        -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+$(SHAREDLIBV): $(OBJS_PIC) $(OBJA_PIC)
+        $(LDSHARED) -o $@ $(OBJS_PIC) $(OBJA_PIC)
+        rm -f $(SHAREDLIB) $(SHAREDLIBM)
+        ln -s $@ $(SHAREDLIB)
+        ln -s $@ $(SHAREDLIBM)
+
+example$(EXE): example.o $(STATICLIB)
+        $(LD) -o $@ example.o $(LDFLAGS)
+
+minigzip$(EXE): minigzip.o $(STATICLIB)
+        $(LD) -o $@ minigzip.o $(LDFLAGS)
+
+install: $(LIBS)
+        mkdir -p $(DESTDIR)$(exec_prefix)
+        mkdir -p $(DESTDIR)$(includedir)
+        mkdir -p $(DESTDIR)$(libdir)
+        mkdir -p $(DESTDIR)$(man3dir)
+        mkdir -p $(DESTDIR)$(pkgconfigdir)
+        cp zlib.h zconf.h $(DESTDIR)$(includedir)
+        chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+        cp $(LIBS) $(DESTDIR)$(libdir)
+        cd $(DESTDIR)$(libdir); chmod 755 $(LIBS)
+        -@(cd $(DESTDIR)$(libdir); $(RANLIB) $(STATICLIB) || true) >/dev/null 2>&1
+        cd $(DESTDIR)$(libdir); if test -f $(SHAREDLIBV); then \
+          rm -f $(SHAREDLIB) $(SHAREDLIBM); \
+          ln -s $(SHAREDLIBV) $(SHAREDLIB); \
+          ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
+          (ldconfig || true)  >/dev/null 2>&1; \
+        fi
+        cp zlib.3 $(DESTDIR)$(man3dir)
+        chmod 644 $(DESTDIR)$(man3dir)/zlib.3
+        cp zlib.pc $(DESTDIR)$(pkgconfigdir)
+        chmod 644 $(DESTDIR)$(pkgconfigdir)/zlib.pc
+# The ranlib in install is needed on NeXTSTEP which checks file times
+# ldconfig is for Linux
+
+uninstall:
+        cd $(DESTDIR)$(includedir); rm -f zlib.h zconf.h
+        cd $(DESTDIR)$(libdir); rm -f $(STATICLIB); \
+        if test -f $(SHAREDLIBV); then \
+          rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
+        fi
+        cd $(DESTDIR)$(man3dir); rm -f zlib.3
+        cd $(DESTDIR)$(pkgconfigdir); rm -f zlib.pc
+
+mostlyclean: clean
+clean:
+        rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+           libz.* foo.gz so_locations \
+           _match.s maketree contrib/infback9/*.o
+
+maintainer-clean: distclean
+distclean: clean
+        cp -p Makefile.in Makefile
+        cp -p zconf.in.h zconf.h
+        rm -f zlib.pc .DS_Store
+
+tags:
+        etags *.[ch]
+
+depend:
+        makedepend -- $(CFLAGS) -- *.[ch]
+
+# "fake" targets: not real filenames and no deps (else "touch clean" defeats)
+.PHONY: install uninstall clean tags depend
+
+# DO NOT DELETE THIS LINE -- "make depend" depends on it.
+
+adler32.o: zlib.h zconf.h
+adler32.pic.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+compress.pic.o: zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
+crc32.pic.o: crc32.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+deflate.pic.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+example.pic.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+gzio.pic.o: zutil.h zlib.h zconf.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inffast.pic.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.pic.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.pic.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+inftrees.pic.o: zutil.h zlib.h zconf.h inftrees.h
+minigzip.o: zlib.h zconf.h
+minigzip.pic.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+trees.pic.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+uncompr.pic.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
+zutil.pic.o: zutil.h zlib.h zconf.h
diff --git a/todo/README b/todo/README
new file mode 100644
index 0000000..f87a7df
--- /dev/null
+++ b/todo/README
@@ -0,0 +1 @@
+This "todo" directory contains works in progress.  Nothing in here works, so don't try to use it!
diff --git a/trees.c b/trees.c
index 395e4e1..94f28bb 100644
--- a/trees.c
+++ b/trees.c
@@ -1,5 +1,6 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2005 Jean-loup Gailly
+ * Copyright (C) 1995-2006 Jean-loup Gailly
+ * detect_data_type() function provided freely by Cosmin Truta, 2006
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -152,7 +153,7 @@ local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
                               int blcodes));
 local void compress_block OF((deflate_state *s, ct_data *ltree,
                               ct_data *dtree));
-local void set_data_type  OF((deflate_state *s));
+local int  detect_data_type OF((deflate_state *s));
 local unsigned bi_reverse OF((unsigned value, int length));
 local void bi_windup      OF((deflate_state *s));
 local void bi_flush       OF((deflate_state *s));
@@ -250,11 +251,13 @@ local void tr_static_init()
     if (static_init_done) return;
 
     /* For some embedded targets, global variables are not initialized: */
+#ifdef NO_INIT_GLOBAL_POINTERS
     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;
+#endif
 
     /* Initialize the mapping length (0..255) -> length code (0..28) */
     length = 0;
@@ -931,8 +934,8 @@ void _tr_flush_block(s, buf, stored_len, eof)
     if (s->level > 0) {
 
         /* Check if the file is binary or text */
-        if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
-            set_data_type(s);
+        if (s->strm->data_type == Z_UNKNOWN)
+            s->strm->data_type = detect_data_type(s);
 
         /* Construct the literal and distance trees */
         build_tree(s, (tree_desc *)(&(s->l_desc)));
@@ -1118,24 +1121,45 @@ local void compress_block(s, ltree, dtree)
 }
 
 /* ===========================================================================
- * Set the data type to BINARY or TEXT, using a crude approximation:
- * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
- * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
+ * Check if the data type is TEXT or BINARY, using the following algorithm:
+ * - TEXT if the two conditions below are satisfied:
+ *    a) There are no non-portable control characters belonging to the
+ *       "black list" (0..6, 14..25, 28..31).
+ *    b) There is at least one printable character belonging to the
+ *       "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
+ * - BINARY otherwise.
+ * - The following partially-portable control characters form a
+ *   "gray list" that is ignored in this detection algorithm:
+ *   (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}).
  * IN assertion: the fields Freq of dyn_ltree are set.
  */
-local void set_data_type(s)
+local int detect_data_type(s)
     deflate_state *s;
 {
+    /* black_mask is the bit mask of black-listed bytes
+     * set bits 0..6, 14..25, and 28..31
+     * 0xf3ffc07f = binary 11110011111111111100000001111111
+     */
+    unsigned long black_mask = 0xf3ffc07fUL;
     int n;
 
-    for (n = 0; n < 9; n++)
+    /* Check for non-textual ("black-listed") bytes. */
+    for (n = 0; n <= 31; n++, black_mask >>= 1)
+        if ((black_mask & 1) && (s->dyn_ltree[n].Freq != 0))
+            return Z_BINARY;
+
+    /* Check for textual ("white-listed") bytes. */
+    if (s->dyn_ltree[9].Freq != 0 || s->dyn_ltree[10].Freq != 0
+            || s->dyn_ltree[13].Freq != 0)
+        return Z_TEXT;
+    for (n = 32; n < LITERALS; n++)
         if (s->dyn_ltree[n].Freq != 0)
-            break;
-    if (n == 9)
-        for (n = 14; n < 32; n++)
-            if (s->dyn_ltree[n].Freq != 0)
-                break;
-    s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
+            return Z_TEXT;
+
+    /* There are no "black-listed" or "white-listed" bytes:
+     * this stream either is empty or has tolerated ("gray-listed") bytes only.
+     */
+    return Z_BINARY;
 }
 
 /* ===========================================================================
diff --git a/watcom/watcom_f.mak b/watcom/watcom_f.mak
new file mode 100644
index 0000000..a52229a
--- /dev/null
+++ b/watcom/watcom_f.mak
@@ -0,0 +1,40 @@
+# Makefile for zlib
+# OpenWatcom flat model
+# Last updated: 28-Dec-2005
+
+# To use, do "wmake -f watcom_f.mak"
+
+C_SOURCE =  adler32.c  compress.c crc32.c   deflate.c    &
+            gzio.c     infback.c  inffast.c inflate.c    &
+            inftrees.c trees.c    uncompr.c zutil.c
+
+OBJS =      adler32.obj  compress.obj crc32.obj   deflate.obj    &
+            gzio.obj     infback.obj  inffast.obj inflate.obj    &
+            inftrees.obj trees.obj    uncompr.obj zutil.obj
+
+CC       = wcc386
+LINKER   = wcl386
+CFLAGS   = -zq -mf -3r -fp3 -s -bt=dos -oilrtfm -fr=nul -wx
+ZLIB_LIB = zlib_f.lib
+
+.C.OBJ: 
+        $(CC) $(CFLAGS) $[@
+
+all: $(ZLIB_LIB) example.exe minigzip.exe
+
+$(ZLIB_LIB): $(OBJS)
+        wlib -b -c $(ZLIB_LIB) -+adler32.obj  -+compress.obj -+crc32.obj
+        wlib -b -c $(ZLIB_LIB) -+deflate.obj  -+gzio.obj     -+infback.obj
+        wlib -b -c $(ZLIB_LIB) -+inffast.obj  -+inflate.obj  -+inftrees.obj
+        wlib -b -c $(ZLIB_LIB) -+trees.obj    -+uncompr.obj  -+zutil.obj
+
+example.exe: $(ZLIB_LIB) example.obj
+        $(LINKER) -ldos32a -fe=example.exe example.obj $(ZLIB_LIB)
+
+minigzip.exe: $(ZLIB_LIB) minigzip.obj
+        $(LINKER) -ldos32a -fe=minigzip.exe minigzip.obj $(ZLIB_LIB)
+
+clean: .SYMBOLIC
+          del *.obj
+          del $(ZLIB_LIB)
+          @echo Cleaning done
diff --git a/watcom/watcom_l.mak b/watcom/watcom_l.mak
new file mode 100644
index 0000000..bf03edd
--- /dev/null
+++ b/watcom/watcom_l.mak
@@ -0,0 +1,40 @@
+# Makefile for zlib
+# OpenWatcom large model
+# Last updated: 28-Dec-2005
+
+# To use, do "wmake -f watcom_l.mak"
+
+C_SOURCE =  adler32.c  compress.c crc32.c   deflate.c    &
+            gzio.c     infback.c  inffast.c inflate.c    &
+            inftrees.c trees.c    uncompr.c zutil.c
+
+OBJS =      adler32.obj  compress.obj crc32.obj   deflate.obj    &
+            gzio.obj     infback.obj  inffast.obj inflate.obj    &
+            inftrees.obj trees.obj    uncompr.obj zutil.obj
+
+CC       = wcc
+LINKER   = wcl
+CFLAGS   = -zq -ml -s -bt=dos -oilrtfm -fr=nul -wx
+ZLIB_LIB = zlib_l.lib
+
+.C.OBJ: 
+        $(CC) $(CFLAGS) $[@
+
+all: $(ZLIB_LIB) example.exe minigzip.exe
+
+$(ZLIB_LIB): $(OBJS)
+        wlib -b -c $(ZLIB_LIB) -+adler32.obj  -+compress.obj -+crc32.obj
+        wlib -b -c $(ZLIB_LIB) -+deflate.obj  -+gzio.obj     -+infback.obj
+        wlib -b -c $(ZLIB_LIB) -+inffast.obj  -+inflate.obj  -+inftrees.obj
+        wlib -b -c $(ZLIB_LIB) -+trees.obj    -+uncompr.obj  -+zutil.obj
+
+example.exe: $(ZLIB_LIB) example.obj
+        $(LINKER) -fe=example.exe example.obj $(ZLIB_LIB)
+
+minigzip.exe: $(ZLIB_LIB) minigzip.obj
+        $(LINKER) -fe=minigzip.exe minigzip.obj $(ZLIB_LIB)
+
+clean: .SYMBOLIC
+          del *.obj
+          del $(ZLIB_LIB)
+          @echo Cleaning done
diff --git a/win32/DLL_FAQ.txt b/win32/DLL_FAQ.txt
index fb18e07..12c0090 100644
--- a/win32/DLL_FAQ.txt
+++ b/win32/DLL_FAQ.txt
@@ -16,7 +16,7 @@ in the zlib distribution, or at the following location:
 
     Pointers to a precompiled ZLIB1.DLL can be found in the zlib
     web site at:
-      http://www.zlib.org/
+      http://www.zlib.net/
 
     Applications that link to ZLIB1.DLL can rely on the following
     specification:
@@ -350,9 +350,9 @@ in the zlib distribution, or at the following location:
     your build is unofficial.  You should give it a different file
     name, and/or install it in a private directory that can be
     accessed by your application only, and is not visible to the
-    others (e.g. it's not in the SYSTEM or the SYSTEM32 directory,
-    and it's not in the PATH).  Otherwise, your build may clash
-    with applications that link to the official build.
+    others (i.e. it's neither in the PATH, nor in the SYSTEM or
+    SYSTEM32 directories).  Otherwise, your build may clash with
+    applications that link to the official build.
 
     For example, in Cygwin, zlib is linked to the Cygwin runtime
     CYGWIN1.DLL, and it is distributed under the name CYGZ.DLL.
diff --git a/win32/Makefile.bor b/win32/Makefile.bor
index b802519..67dafaa 100644
--- a/win32/Makefile.bor
+++ b/win32/Makefile.bor
@@ -1,9 +1,6 @@
 # Makefile for zlib
 # Borland C++ for Win32
 #
-# Updated for zlib 1.2.x by Cosmin Truta, 11-Mar-2003
-# Last updated: 28-Aug-2003
-#
 # Usage:
 #  make -f win32/Makefile.bor
 #  make -f win32/Makefile.bor LOCAL_ZLIB=-DASMV OBJA=match.obj OBJPA=+match.obj
@@ -99,8 +96,8 @@ minigzip.exe: minigzip.obj $(ZLIB_LIB)
 
 # cleanup
 clean:
+        -del $(ZLIB_LIB)
         -del *.obj
-        -del *.lib
         -del *.exe
         -del *.tds
         -del zlib.bak
diff --git a/win32/Makefile.msc b/win32/Makefile.msc
index 528ecaa..5900d66 100644
--- a/win32/Makefile.msc
+++ b/win32/Makefile.msc
@@ -1,11 +1,5 @@
-# Makefile for zlib -- Microsoft (Visual) C
-#
-# Authors:
-#   Cosmin Truta, 11-Mar-2003
-#   Christian Spieler, 19-Mar-2003
-#
-# Last updated:
-#   Cosmin Truta, 27-Aug-2003
+# Makefile for zlib using Microsoft (Visual) C
+# zlib is copyright (C) 1995-2006 Jean-loup Gailly and Mark Adler
 #
 # Usage:
 #   nmake -f win32/Makefile.msc            (standard build)
@@ -27,9 +21,10 @@ AS = ml
 LD = link
 AR = lib
 RC = rc
-CFLAGS  = -nologo -MD -O2 $(LOC)
+CFLAGS  = -nologo -MD -O2 -Oy- $(LOC)
+WFLAGS  = -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE
 ASFLAGS = -coff
-LDFLAGS = -nologo -release
+LDFLAGS = -nologo -debug -release
 ARFLAGS = -nologo
 RCFLAGS = /dWIN32 /r
 
@@ -50,21 +45,31 @@ $(IMPLIB): $(SHAREDLIB)
 $(SHAREDLIB): win32/zlib.def $(OBJS) $(OBJA) zlib1.res
         $(LD) $(LDFLAGS) -def:win32/zlib.def -dll -implib:$(IMPLIB) \
           -out:$@ $(OBJS) $(OBJA) zlib1.res
+        if exist $@.manifest \
+          mt -nologo -manifest $@.manifest -outputresource:$@;2
 
 example.exe: example.obj $(STATICLIB)
         $(LD) $(LDFLAGS) example.obj $(STATICLIB)
+        if exist $@.manifest \
+          mt -nologo -manifest $@.manifest -outputresource:$@;1
 
 minigzip.exe: minigzip.obj $(STATICLIB)
         $(LD) $(LDFLAGS) minigzip.obj $(STATICLIB)
+        if exist $@.manifest \
+          mt -nologo -manifest $@.manifest -outputresource:$@;1
 
 example_d.exe: example.obj $(IMPLIB)
         $(LD) $(LDFLAGS) -out:$@ example.obj $(IMPLIB)
+        if exist $@.manifest \
+          mt -nologo -manifest $@.manifest -outputresource:$@;1
 
 minigzip_d.exe: minigzip.obj $(IMPLIB)
         $(LD) $(LDFLAGS) -out:$@ minigzip.obj $(IMPLIB)
+        if exist $@.manifest \
+          mt -nologo -manifest $@.manifest -outputresource:$@;1
 
 .c.obj:
-        $(CC) -c $(CFLAGS) $<
+        $(CC) -c $(WFLAGS) $(CFLAGS) $<
 
 .asm.obj:
         $(AS) -c $(ASFLAGS) $<
@@ -123,4 +128,6 @@ clean:
         -del *.res
         -del *.exp
         -del *.exe
+        -del *.pdb
+        -del *.manifest
         -del foo.gz
diff --git a/win32/zlib.def b/win32/zlib.def
index a47cbc1..dbea9c5 100644
--- a/win32/zlib.def
+++ b/win32/zlib.def
@@ -43,12 +43,15 @@ EXPORTS
     gzrewind
     gztell
     gzeof
+    gzdirect
     gzclose
     gzerror
     gzclearerr
 ; checksum functions
     adler32
+    adler32_combine
     crc32
+    crc32_combine
 ; various hacks, don't look :)
     deflateInit_
     deflateInit2_
diff --git a/win32/zlib1.rc b/win32/zlib1.rc
index 99025c9..0d1d7ff 100644
--- a/win32/zlib1.rc
+++ b/win32/zlib1.rc
@@ -1,19 +1,20 @@
-#include <windows.h>
+#include <winver.h>
+#include "../zlib.h"
 
 #ifdef GCC_WINDRES
 VS_VERSION_INFO         VERSIONINFO
 #else
 VS_VERSION_INFO         VERSIONINFO     MOVEABLE IMPURE LOADONCALL DISCARDABLE
 #endif
-  FILEVERSION           1,2,2,0
-  PRODUCTVERSION        1,2,2,0
+  FILEVERSION           ZLIB_VER_MAJOR,ZLIB_VER_MINOR,ZLIB_VER_REVISION,0
+  PRODUCTVERSION        ZLIB_VER_MAJOR,ZLIB_VER_MINOR,ZLIB_VER_REVISION,0
   FILEFLAGSMASK         VS_FFI_FILEFLAGSMASK
 #ifdef _DEBUG
   FILEFLAGS             1
 #else
   FILEFLAGS             0
 #endif
-  FILEOS                VOS_DOS_WINDOWS32
+  FILEOS                VOS__WINDOWS32
   FILETYPE              VFT_DLL
   FILESUBTYPE           0       // not used
 BEGIN
@@ -23,13 +24,13 @@ BEGIN
     //language ID = U.S. English, char set = Windows, Multilingual
     BEGIN
       VALUE "FileDescription",  "zlib data compression library\0"
-      VALUE "FileVersion",      "1.2.3\0"
+      VALUE "FileVersion",      ZLIB_VERSION "\0"
       VALUE "InternalName",     "zlib1.dll\0"
-      VALUE "LegalCopyright",   "(C) 1995-2004 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright",   "(C) 1995-2006 Jean-loup Gailly & Mark Adler\0"
       VALUE "OriginalFilename", "zlib1.dll\0"
       VALUE "ProductName",      "zlib\0"
-      VALUE "ProductVersion",   "1.2.3\0"
-      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
+      VALUE "ProductVersion",   ZLIB_VERSION "\0"
+      VALUE "Comments",         "For more information visit http://www.zlib.net/\0"
     END
   END
   BLOCK "VarFileInfo"
diff --git a/zconf.h b/zconf.h
index 03a9431..5619c76 100644
--- a/zconf.h
+++ b/zconf.h
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2006 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -11,52 +11,115 @@
 /*
  * If you *really* need a unique prefix for all types and library functions,
  * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ * Even better than compiling with -DZ_PREFIX would be to use configure to set
+ * this permanently in zconf.h using "./configure --zprefix".
  */
-#ifdef Z_PREFIX
-#  define deflateInit_          z_deflateInit_
+#ifdef Z_PREFIX     /* may be set to #if 1 by ./configure */
+
+/* all linked symbols */
+#  define _dist_code            z__dist_code
+#  define _length_code          z__length_code
+#  define _tr_align             z__tr_align
+#  define _tr_flush_block       z__tr_flush_block
+#  define _tr_init              z__tr_init
+#  define _tr_stored_block      z__tr_stored_block
+#  define _tr_tally             z__tr_tally
+#  define adler32               z_adler32
+#  define adler32_combine       z_adler32_combine
+#  define compress              z_compress
+#  define compress2             z_compress2
+#  define compressBound         z_compressBound
+#  define crc32                 z_crc32
+#  define crc32_combine         z_crc32_combine
 #  define deflate               z_deflate
+#  define deflateBound          z_deflateBound
+#  define deflateCopy           z_deflateCopy
 #  define deflateEnd            z_deflateEnd
-#  define inflateInit_          z_inflateInit_
-#  define inflate               z_inflate
-#  define inflateEnd            z_inflateEnd
 #  define deflateInit2_         z_deflateInit2_
-#  define deflateSetDictionary  z_deflateSetDictionary
-#  define deflateCopy           z_deflateCopy
-#  define deflateReset          z_deflateReset
+#  define deflateInit_          z_deflateInit_
 #  define deflateParams         z_deflateParams
-#  define deflateBound          z_deflateBound
 #  define deflatePrime          z_deflatePrime
+#  define deflateReset          z_deflateReset
+#  define deflateSetDictionary  z_deflateSetDictionary
+#  define deflateSetHeader      z_deflateSetHeader
+#  define deflateTune           z_deflateTune
+#  define deflate_copyright     z_deflate_copyright
+#  define get_crc_table         z_get_crc_table
+#  define gzclearerr            z_gzclearerr
+#  define gzclose               z_gzclose
+#  define gzdirect              z_gzdirect
+#  define gzdopen               z_gzdopen
+#  define gzeof                 z_gzeof
+#  define gzerror               z_gzerror
+#  define gzflush               z_gzflush
+#  define gzgetc                z_gzgetc
+#  define gzgets                z_gzgets
+#  define gzopen                z_gzopen
+#  define gzprintf              z_gzprintf
+#  define gzputc                z_gzputc
+#  define gzputs                z_gzputs
+#  define gzread                z_gzread
+#  define gzrewind              z_gzrewind
+#  define gzseek                z_gzseek
+#  define gzsetparams           z_gzsetparams
+#  define gztell                z_gztell
+#  define gzungetc              z_gzungetc
+#  define gzwrite               z_gzwrite
+#  define inflate               z_inflate
+#  define inflateBack           z_inflateBack
+#  define inflateBackEnd        z_inflateBackEnd
+#  define inflateBackInit_      z_inflateBackInit_
+#  define inflateCopy           z_inflateCopy
+#  define inflateEnd            z_inflateEnd
+#  define inflateGetHeader      z_inflateGetHeader
 #  define inflateInit2_         z_inflateInit2_
+#  define inflateInit_          z_inflateInit_
+#  define inflatePrime          z_inflatePrime
+#  define inflateReset          z_inflateReset
 #  define inflateSetDictionary  z_inflateSetDictionary
 #  define inflateSync           z_inflateSync
 #  define inflateSyncPoint      z_inflateSyncPoint
-#  define inflateCopy           z_inflateCopy
-#  define inflateReset          z_inflateReset
-#  define inflateBack           z_inflateBack
-#  define inflateBackEnd        z_inflateBackEnd
-#  define compress              z_compress
-#  define compress2             z_compress2
-#  define compressBound         z_compressBound
+#  define inflate_copyright     z_inflate_copyright
+#  define inflate_fast          z_inflate_fast
+#  define inflate_table         z_inflate_table
 #  define uncompress            z_uncompress
-#  define adler32               z_adler32
-#  define crc32                 z_crc32
-#  define get_crc_table         z_get_crc_table
 #  define zError                z_zError
+#  define z_errmsg              z_z_errmsg
+#  define zcalloc               z_zcalloc
+#  define zcfree                z_zcfree
+#  define zlibCompileFlags      z_zlibCompileFlags
+#  define zlibVersion           z_zlibVersion
 
+/* all zlib typedefs in zlib.h and zconf.h */
+#  define Byte                  z_Byte
+#  define Bytef                 z_Bytef
 #  define alloc_func            z_alloc_func
+#  define charf                 z_charf
 #  define free_func             z_free_func
+#  define gzFile                z_gzFile
+#  define gz_header             z_gz_header
+#  define gz_headerp            z_gz_headerp
 #  define in_func               z_in_func
+#  define intf                  z_intf
 #  define out_func              z_out_func
-#  define Byte                  z_Byte
 #  define uInt                  z_uInt
-#  define uLong                 z_uLong
-#  define Bytef                 z_Bytef
-#  define charf                 z_charf
-#  define intf                  z_intf
 #  define uIntf                 z_uIntf
+#  define uLong                 z_uLong
 #  define uLongf                z_uLongf
-#  define voidpf                z_voidpf
 #  define voidp                 z_voidp
+#  define voidp                 z_voidp
+#  define voidpc                z_voidpc
+#  define voidpc                z_voidpc
+#  define voidpf                z_voidpf
+#  define voidpf                z_voidpf
+#  define z_stream              z_z_stream
+#  define z_streamp             z_z_streamp
+
+/* all zlib structs in zlib.h and zconf.h */
+#  define gz_header_s           z_gz_header_s
+#  define internal_state        z_internal_state
+#  define z_stream_s            z_z_stream_s
+
 #endif
 
 #if defined(__MSDOS__) && !defined(MSDOS)
@@ -243,6 +306,10 @@
 #  endif
 #endif
 
+#ifdef HAVE_VISIBILITY_PRAGMA
+#  define ZEXTERN __attribute__((visibility ("default"))) extern
+#endif
+
 #ifndef ZEXTERN
 #  define ZEXTERN extern
 #endif
@@ -307,9 +374,6 @@ typedef uLong FAR uLongf;
 
 #if defined(__MVS__)
 #  define NO_vsnprintf
-#  ifdef FAR
-#    undef FAR
-#  endif
 #endif
 
 /* MVS linker does not support external names larger than 8 bytes */
diff --git a/zconf.in.h b/zconf.in.h
index 03a9431..5619c76 100644
--- a/zconf.in.h
+++ b/zconf.in.h
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2006 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -11,52 +11,115 @@
 /*
  * If you *really* need a unique prefix for all types and library functions,
  * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ * Even better than compiling with -DZ_PREFIX would be to use configure to set
+ * this permanently in zconf.h using "./configure --zprefix".
  */
-#ifdef Z_PREFIX
-#  define deflateInit_          z_deflateInit_
+#ifdef Z_PREFIX     /* may be set to #if 1 by ./configure */
+
+/* all linked symbols */
+#  define _dist_code            z__dist_code
+#  define _length_code          z__length_code
+#  define _tr_align             z__tr_align
+#  define _tr_flush_block       z__tr_flush_block
+#  define _tr_init              z__tr_init
+#  define _tr_stored_block      z__tr_stored_block
+#  define _tr_tally             z__tr_tally
+#  define adler32               z_adler32
+#  define adler32_combine       z_adler32_combine
+#  define compress              z_compress
+#  define compress2             z_compress2
+#  define compressBound         z_compressBound
+#  define crc32                 z_crc32
+#  define crc32_combine         z_crc32_combine
 #  define deflate               z_deflate
+#  define deflateBound          z_deflateBound
+#  define deflateCopy           z_deflateCopy
 #  define deflateEnd            z_deflateEnd
-#  define inflateInit_          z_inflateInit_
-#  define inflate               z_inflate
-#  define inflateEnd            z_inflateEnd
 #  define deflateInit2_         z_deflateInit2_
-#  define deflateSetDictionary  z_deflateSetDictionary
-#  define deflateCopy           z_deflateCopy
-#  define deflateReset          z_deflateReset
+#  define deflateInit_          z_deflateInit_
 #  define deflateParams         z_deflateParams
-#  define deflateBound          z_deflateBound
 #  define deflatePrime          z_deflatePrime
+#  define deflateReset          z_deflateReset
+#  define deflateSetDictionary  z_deflateSetDictionary
+#  define deflateSetHeader      z_deflateSetHeader
+#  define deflateTune           z_deflateTune
+#  define deflate_copyright     z_deflate_copyright
+#  define get_crc_table         z_get_crc_table
+#  define gzclearerr            z_gzclearerr
+#  define gzclose               z_gzclose
+#  define gzdirect              z_gzdirect
+#  define gzdopen               z_gzdopen
+#  define gzeof                 z_gzeof
+#  define gzerror               z_gzerror
+#  define gzflush               z_gzflush
+#  define gzgetc                z_gzgetc
+#  define gzgets                z_gzgets
+#  define gzopen                z_gzopen
+#  define gzprintf              z_gzprintf
+#  define gzputc                z_gzputc
+#  define gzputs                z_gzputs
+#  define gzread                z_gzread
+#  define gzrewind              z_gzrewind
+#  define gzseek                z_gzseek
+#  define gzsetparams           z_gzsetparams
+#  define gztell                z_gztell
+#  define gzungetc              z_gzungetc
+#  define gzwrite               z_gzwrite
+#  define inflate               z_inflate
+#  define inflateBack           z_inflateBack
+#  define inflateBackEnd        z_inflateBackEnd
+#  define inflateBackInit_      z_inflateBackInit_
+#  define inflateCopy           z_inflateCopy
+#  define inflateEnd            z_inflateEnd
+#  define inflateGetHeader      z_inflateGetHeader
 #  define inflateInit2_         z_inflateInit2_
+#  define inflateInit_          z_inflateInit_
+#  define inflatePrime          z_inflatePrime
+#  define inflateReset          z_inflateReset
 #  define inflateSetDictionary  z_inflateSetDictionary
 #  define inflateSync           z_inflateSync
 #  define inflateSyncPoint      z_inflateSyncPoint
-#  define inflateCopy           z_inflateCopy
-#  define inflateReset          z_inflateReset
-#  define inflateBack           z_inflateBack
-#  define inflateBackEnd        z_inflateBackEnd
-#  define compress              z_compress
-#  define compress2             z_compress2
-#  define compressBound         z_compressBound
+#  define inflate_copyright     z_inflate_copyright
+#  define inflate_fast          z_inflate_fast
+#  define inflate_table         z_inflate_table
 #  define uncompress            z_uncompress
-#  define adler32               z_adler32
-#  define crc32                 z_crc32
-#  define get_crc_table         z_get_crc_table
 #  define zError                z_zError
+#  define z_errmsg              z_z_errmsg
+#  define zcalloc               z_zcalloc
+#  define zcfree                z_zcfree
+#  define zlibCompileFlags      z_zlibCompileFlags
+#  define zlibVersion           z_zlibVersion
 
+/* all zlib typedefs in zlib.h and zconf.h */
+#  define Byte                  z_Byte
+#  define Bytef                 z_Bytef
 #  define alloc_func            z_alloc_func
+#  define charf                 z_charf
 #  define free_func             z_free_func
+#  define gzFile                z_gzFile
+#  define gz_header             z_gz_header
+#  define gz_headerp            z_gz_headerp
 #  define in_func               z_in_func
+#  define intf                  z_intf
 #  define out_func              z_out_func
-#  define Byte                  z_Byte
 #  define uInt                  z_uInt
-#  define uLong                 z_uLong
-#  define Bytef                 z_Bytef
-#  define charf                 z_charf
-#  define intf                  z_intf
 #  define uIntf                 z_uIntf
+#  define uLong                 z_uLong
 #  define uLongf                z_uLongf
-#  define voidpf                z_voidpf
 #  define voidp                 z_voidp
+#  define voidp                 z_voidp
+#  define voidpc                z_voidpc
+#  define voidpc                z_voidpc
+#  define voidpf                z_voidpf
+#  define voidpf                z_voidpf
+#  define z_stream              z_z_stream
+#  define z_streamp             z_z_streamp
+
+/* all zlib structs in zlib.h and zconf.h */
+#  define gz_header_s           z_gz_header_s
+#  define internal_state        z_internal_state
+#  define z_stream_s            z_z_stream_s
+
 #endif
 
 #if defined(__MSDOS__) && !defined(MSDOS)
@@ -243,6 +306,10 @@
 #  endif
 #endif
 
+#ifdef HAVE_VISIBILITY_PRAGMA
+#  define ZEXTERN __attribute__((visibility ("default"))) extern
+#endif
+
 #ifndef ZEXTERN
 #  define ZEXTERN extern
 #endif
@@ -307,9 +374,6 @@ typedef uLong FAR uLongf;
 
 #if defined(__MVS__)
 #  define NO_vsnprintf
-#  ifdef FAR
-#    undef FAR
-#  endif
 #endif
 
 /* MVS linker does not support external names larger than 8 bytes */
diff --git a/zlib.3 b/zlib.3
index 90b8162..5069b37 100644
--- a/zlib.3
+++ b/zlib.3
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "18 July 2005"
+.TH ZLIB 3 "16 August 2006"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -133,7 +133,7 @@ before asking for help.
 Send questions and/or comments to zlib@gzip.org,
 or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
 .SH AUTHORS
-Version 1.2.3
+Version 1.2.3.1
 Copyright (C) 1995-2005 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP
diff --git a/zlib.h b/zlib.h
index 0228179..20dbcd0 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,7 +1,7 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.2.3, July 18th, 2005
+  version 1.2.3.1, August 16th, 2006
 
-  Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
+  Copyright (C) 1995-2006 Jean-loup Gailly and Mark Adler
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -37,8 +37,11 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.2.3"
-#define ZLIB_VERNUM 0x1230
+#define ZLIB_VERSION "1.2.3.1"
+#define ZLIB_VERNUM 0x1231
+#define ZLIB_VER_MAJOR 1
+#define ZLIB_VER_MINOR 2
+#define ZLIB_VER_REVISION 3
 
 /*
      The 'zlib' compression library provides in-memory compression and
@@ -353,10 +356,14 @@ ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
 
      inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
    memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
-   version assumed by the caller.  msg is set to null if there is no error
-   message. inflateInit does not perform any decompression apart from reading
-   the zlib header if present: this will be done by inflate().  (So next_in and
-   avail_in may be modified, but next_out and avail_out are unchanged.)
+   version assumed by the caller, or Z_STREAM_ERROR if the parameters are
+   invalid, such as a null pointer to the structure.  msg is set to null if
+   there is no error message. inflateInit does not perform any decompression
+   apart from possibly reading the zlib header if present: actual decompression
+   will be done by inflate().  (So next_in and avail_in may be modified, but
+   next_out and avail_out are unused and unchanged.)  The current
+   implementation of inflateInit() does not process any header information --
+   that is deferred until inflate() is called.
 */
 
 
@@ -645,9 +652,10 @@ ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
                                        uLong sourceLen));
 /*
      deflateBound() returns an upper bound on the compressed size after
-   deflation of sourceLen bytes.  It must be called after deflateInit()
-   or deflateInit2().  This would be used to allocate an output buffer
-   for deflation in a single pass, and so would be called before deflate().
+   deflation of sourceLen bytes.  It must be called after deflateInit() or
+   deflateInit2(), and after deflateSetHeader(), if used.  This would be used
+   to allocate an output buffer for deflation in a single pass, and so would be
+   called before deflate().
 */
 
 ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
@@ -726,11 +734,15 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
    a crc32 instead of an adler32.
 
      inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
-   memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
-   is set to null if there is no error message.  inflateInit2 does not perform
-   any decompression apart from reading the zlib header if present: this will
-   be done by inflate(). (So next_in and avail_in may be modified, but next_out
-   and avail_out are unchanged.)
+   memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
+   version assumed by the caller, or Z_STREAM_ERROR if the parameters are
+   invalid, such as a null pointer to the structure.  msg is set to null if
+   there is no error message. inflateInit2 does not perform any decompression
+   apart from possibly reading the zlib header if present: actual decompression
+   will be done by inflate().  (So next_in and avail_in may be modified, but
+   next_out and avail_out are unused and unchanged.)  The current
+   implementation of inflateInit2() does not process any header information --
+   that is deferred until inflate() is called.
 */
 
 ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
@@ -1230,7 +1242,8 @@ 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).
+   error number.  Note that once file is close, you cannot call gzerror with
+   file, since its structures have been deallocated.
 */
 
 ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
@@ -1240,6 +1253,9 @@ ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
    error occurred in the file system and not in the compression library,
    errnum is set to Z_ERRNO and the application may consult errno
    to get the exact error code.
+
+   The application must not modify the returned string and future calls to
+   this function may invalidate the returned string.
 */
 
 ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
@@ -1339,8 +1355,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
         inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
 #define inflateBackInit(strm, windowBits, window) \
         inflateBackInit_((strm), (windowBits), (window), \
-        ZLIB_VERSION, sizeof(z_stream))
-
+                                            ZLIB_VERSION, sizeof(z_stream))
 
 #if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
     struct internal_state {int dummy;}; /* hack for buggy compilers */
diff --git a/zlib.map b/zlib.map
new file mode 100644
index 0000000..da683a8
--- /dev/null
+++ b/zlib.map
@@ -0,0 +1,44 @@
+ZLIB_1.2.0 {
+  global:
+    compressBound;
+    deflateBound;
+    inflateBack;
+    inflateBackEnd;
+    inflateBackInit_;
+    inflateCopy;
+  local:
+    deflate_copyright;
+    inflate_copyright;
+    inflate_fast;
+    inflate_table;
+    zcalloc;
+    zcfree;
+    z_errmsg;
+    _*;
+};
+
+ZLIB_1.2.0.2 {
+    gzclearerr;
+    gzungetc;
+    zlibCompileFlags;
+} ZLIB_1.2.0;
+
+ZLIB_1.2.0.8 {
+    deflatePrime;
+} ZLIB_1.2.0.2;
+
+ZLIB_1.2.2 {
+    adler32_combine;
+    crc32_combine;
+    deflateSetHeader;
+    inflateGetHeader;
+} ZLIB_1.2.0.8;
+
+ZLIB_1.2.2.3 {
+    deflateTune;
+    gzdirect;
+} ZLIB_1.2.2;
+
+ZLIB_1.2.2.4 {
+    inflatePrime;
+} ZLIB_1.2.2.3;
diff --git a/zlib.pc.in b/zlib.pc.in
new file mode 100644
index 0000000..3e355aa
--- /dev/null
+++ b/zlib.pc.in
@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: zlib
+Description: zlib compression library
+Version: @VERSION@
+
+Requires: 
+Libs: -L${libdir} -lz
+Cflags: -I${includedir}
diff --git a/zutil.h b/zutil.h
index b7d5eff..cddc4a7 100644
--- a/zutil.h
+++ b/zutil.h
@@ -1,5 +1,5 @@
 /* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2006 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -23,7 +23,7 @@
 #  include <string.h>
 #  include <stdlib.h>
 #endif
-#ifdef NO_ERRNO_H
+#if defined(NO_ERRNO_H) || defined(_WIN32_WCE)
 #   ifdef _WIN32_WCE
       /* The Microsoft C Run-Time Library for Windows CE doesn't have
        * errno.  We define it as a global variable to simplify porting.
@@ -34,9 +34,7 @@
 #   endif
     extern int errno;
 #else
-#  ifndef _WIN32_WCE
-#    include <errno.h>
-#  endif
+#   include <errno.h>
 #endif
 
 #ifndef local
@@ -151,7 +149,7 @@ extern const char * const 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)) && !defined __INTERIX
 #  if defined(_WIN32_WCE)
 #    define fdopen(fd,mode) NULL /* No fdopen() */
 #    ifndef _PTRDIFF_T_DEFINED