zlib 1.2.0.8

ChangeLog

 
                 ChangeLog file for zlib
 
+Changes in 1.2.0.8 (4 November 2003)
+- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
+- Add experimental NO_DIVIDE #define in adler32.c
+    - Possibly faster on some processors (let me know if it is)
+- Correct Z_BLOCK to not return on first inflate call if no wrap
+- Fix strm->data_type on inflate() return to correctly indicate EOB
+- Add deflatePrime() function for appending in the middle of a byte
+- Add contrib/gzappend for an example of appending to a stream
+- Update win32/DLL_FAQ.txt [Truta]
+- Delete Turbo C comment in README [Truta]
+- Improve some indentation in zconf.h [Truta]
+- Fix infinite loop on bad input in configure script [Church]
+- Fix gzeof() for concatenated gzip files [Johnson]
+- Add example to contrib/visual-basic.txt [Michael B.]
+- Add -p to mkdir's in Makefile.in [vda]
+- Fix configure to properly detect presence or lack of printf functions
+- Add AS400 support [Monnerat]
+- Added a little Cygwin support [Wilson]
+
 Changes in 1.2.0.7 (21 September 2003)
 - Correct some debug formats in contrib/infback9
 - Cast a type in a debug statement in trees.c
@@ -10,7 +29,7 @@ Changes in 1.2.0.7 (21 September 2003)
 - Remove some directories in old that have been updated to 1.2
 - Add dylib building for Mac OS X in configure and Makefile.in
 - Remove old distribution stuff from Makefile
-- Update README to point for DLL_FAQ.txt, and add comment on Mac OS X
+- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
 - Update links in README
 
 Changes in 1.2.0.6 (13 September 2003)

Makefile

@@ -30,13 +30,14 @@ CPP=$(CC) -E
 
 LIBS=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.0.7
+SHAREDLIBV=libz.so.1.2.0.8
 SHAREDLIBM=libz.so.1
 
 AR=ar rc
 RANLIB=ranlib
 TAR=tar
 SHELL=/bin/sh
+EXE=
 
 prefix = /usr/local
 exec_prefix = ${prefix}
@@ -53,7 +54,7 @@ OBJA =
 
 TEST_OBJS = example.o minigzip.o
 
-all: example minigzip
+all: example$(EXE) minigzip$(EXE)
 
 check: test
 test: all
@@ -82,17 +83,17 @@ $(SHAREDLIBV): $(OBJS)
 	ln -s $@ $(SHAREDLIB)
 	ln -s $@ $(SHAREDLIBM)
 
-example: example.o $(LIBS)
+example$(EXE): example.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
 
-minigzip: minigzip.o $(LIBS)
+minigzip$(EXE): minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-	-@if [ ! -d $(exec_prefix) ]; then mkdir $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
-	-@if [ ! -d $(libdir)      ]; then mkdir $(libdir); fi
-	-@if [ ! -d $(man3dir)     ]; then mkdir $(man3dir); fi
+	-@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)
@@ -119,7 +120,8 @@ uninstall:
 
 mostlyclean: clean
 clean:
-	rm -f *.o *~ example minigzip libz.* foo.gz so_locations \
+	rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+	   libz.* foo.gz so_locations \
 	   _match.s maketree contrib/infback9/*.o
 
 maintainer-clean: distclean

Makefile.in

@@ -30,13 +30,14 @@ CPP=$(CC) -E
 
 LIBS=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.0.7
+SHAREDLIBV=libz.so.1.2.0.8
 SHAREDLIBM=libz.so.1
 
 AR=ar rc
 RANLIB=ranlib
 TAR=tar
 SHELL=/bin/sh
+EXE=
 
 prefix = /usr/local
 exec_prefix = ${prefix}
@@ -53,7 +54,7 @@ OBJA =
 
 TEST_OBJS = example.o minigzip.o
 
-all: example minigzip
+all: example$(EXE) minigzip$(EXE)
 
 check: test
 test: all
@@ -82,17 +83,17 @@ $(SHAREDLIBV): $(OBJS)
 	ln -s $@ $(SHAREDLIB)
 	ln -s $@ $(SHAREDLIBM)
 
-example: example.o $(LIBS)
+example$(EXE): example.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
 
-minigzip: minigzip.o $(LIBS)
+minigzip$(EXE): minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-	-@if [ ! -d $(exec_prefix) ]; then mkdir $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
-	-@if [ ! -d $(libdir)      ]; then mkdir $(libdir); fi
-	-@if [ ! -d $(man3dir)     ]; then mkdir $(man3dir); fi
+	-@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)
@@ -119,7 +120,8 @@ uninstall:
 
 mostlyclean: clean
 clean:
-	rm -f *.o *~ example minigzip libz.* foo.gz so_locations \
+	rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+	   libz.* foo.gz so_locations \
 	   _match.s maketree contrib/infback9/*.o
 
 maintainer-clean: distclean

README

 ZLIB DATA COMPRESSION LIBRARY
 
-zlib 1.2.0.7 is a general purpose data compression library.  All the code is
+zlib 1.2.0.8 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)
@@ -34,7 +34,7 @@ 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 1.2.0.7 are documented in the file ChangeLog.
+The changes made in version 1.2.0.8 are documented in the file ChangeLog.
 
 Unsupported third party contributions are provided in directory "contrib".
 
@@ -77,9 +77,6 @@ Notes for some targets:
 
 - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
 
-- For Turbo C the small model is supported only with reduced performance to
-  avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
-
 - For PalmOs, see http://palmzlib.sourceforge.net/
 
 - When building a shared, i.e. dynamic library on Mac OS X, the library must be

adler32.c

@@ -8,7 +8,7 @@
 #define ZLIB_INTERNAL
 #include "zlib.h"
 
-#define BASE 65521L /* largest prime smaller than 65536 */
+#define BASE 65521UL    /* largest prime smaller than 65536 */
 #define NMAX 5552
 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
 
@@ -18,6 +18,31 @@
 #define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
 #define DO16(buf)   DO8(buf,0); DO8(buf,8);
 
+#ifdef NO_DIVIDE
+#  define MOD(a) \
+    do { \
+        if (a > (BASE << 16)) a -= (BASE << 16); \
+        if (a > (BASE << 15)) a -= (BASE << 15); \
+        if (a > (BASE << 14)) a -= (BASE << 14); \
+        if (a > (BASE << 13)) a -= (BASE << 13); \
+        if (a > (BASE << 12)) a -= (BASE << 12); \
+        if (a > (BASE << 11)) a -= (BASE << 11); \
+        if (a > (BASE << 10)) a -= (BASE << 10); \
+        if (a > (BASE << 9)) a -= (BASE << 9); \
+        if (a > (BASE << 8)) a -= (BASE << 8); \
+        if (a > (BASE << 7)) a -= (BASE << 7); \
+        if (a > (BASE << 6)) a -= (BASE << 6); \
+        if (a > (BASE << 5)) a -= (BASE << 5); \
+        if (a > (BASE << 4)) a -= (BASE << 4); \
+        if (a > (BASE << 3)) a -= (BASE << 3); \
+        if (a > (BASE << 2)) a -= (BASE << 2); \
+        if (a > (BASE << 1)) a -= (BASE << 1); \
+        if (a > BASE) a -= BASE; \
+    } while (0)
+#else
+#  define MOD(a) a %= BASE
+#endif
+
 /* ========================================================================= */
 uLong ZEXPORT adler32(adler, buf, len)
     uLong adler;
@@ -42,8 +67,8 @@ uLong ZEXPORT adler32(adler, buf, len)
             s1 += *buf++;
             s2 += s1;
         } while (--k);
-        s1 %= BASE;
-        s2 %= BASE;
+        MOD(s1);
+        MOD(s2);
     }
     return (s2 << 16) | s1;
 }

as400/bndsrc

+STRPGMEXP PGMLVL(*CURRENT) SIGNATURE('ZLIB')
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.1.3 entry points.                                    */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+/********************************************************************/
+/*   *MODULE      ADLER32      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("adler32")
+
+/********************************************************************/
+/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("compress")
+  EXPORT SYMBOL("compress2")
+
+/********************************************************************/
+/*   *MODULE      CRC32        ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("crc32")
+  EXPORT SYMBOL("get_crc_table")
+
+/********************************************************************/
+/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("deflate")
+  EXPORT SYMBOL("deflateEnd")
+  EXPORT SYMBOL("deflateSetDictionary")
+  EXPORT SYMBOL("deflateCopy")
+  EXPORT SYMBOL("deflateReset")
+  EXPORT SYMBOL("deflateParams")
+  EXPORT SYMBOL("deflatePrime")
+  EXPORT SYMBOL("deflateInit_")
+  EXPORT SYMBOL("deflateInit2_")
+
+/********************************************************************/
+/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("gzopen")
+  EXPORT SYMBOL("gzdopen")
+  EXPORT SYMBOL("gzsetparams")
+  EXPORT SYMBOL("gzread")
+  EXPORT SYMBOL("gzwrite")
+  EXPORT SYMBOL("gzprintf")
+  EXPORT SYMBOL("gzputs")
+  EXPORT SYMBOL("gzgets")
+  EXPORT SYMBOL("gzputc")
+  EXPORT SYMBOL("gzgetc")
+  EXPORT SYMBOL("gzflush")
+  EXPORT SYMBOL("gzseek")
+  EXPORT SYMBOL("gzrewind")
+  EXPORT SYMBOL("gztell")
+  EXPORT SYMBOL("gzeof")
+  EXPORT SYMBOL("gzclose")
+  EXPORT SYMBOL("gzerror")
+
+/********************************************************************/
+/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("inflate")
+  EXPORT SYMBOL("inflateEnd")
+  EXPORT SYMBOL("inflateSetDictionary")
+  EXPORT SYMBOL("inflateSync")
+  EXPORT SYMBOL("inflateReset")
+  EXPORT SYMBOL("inflateInit_")
+  EXPORT SYMBOL("inflateInit2_")
+  EXPORT SYMBOL("inflateSyncPoint")
+
+/********************************************************************/
+/*   *MODULE      UNCOMPR      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("uncompress")
+
+/********************************************************************/
+/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("zlibVersion")
+  EXPORT SYMBOL("zError")
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.2.0.7 additional entry points.                       */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+/********************************************************************/
+/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("compressBound")
+
+/********************************************************************/
+/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("deflateBound")
+
+/********************************************************************/
+/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("gzungetc")
+  EXPORT SYMBOL("gzclearerr")
+
+/********************************************************************/
+/*   *MODULE      INFBACK      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("inflateBack")
+  EXPORT SYMBOL("inflateBackEnd")
+  EXPORT SYMBOL("inflateBackInit_")
+
+/********************************************************************/
+/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("inflateCopy")
+
+/********************************************************************/
+/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
+/********************************************************************/
+
+  EXPORT SYMBOL("zlibCompileFlags")
+
+ENDPGMEXP

as400/compile.clp

+/******************************************************************************/
+/*                                                                            */
+/*  ZLIB                                                                      */
+/*                                                                            */
+/*    Compile sources into modules and link them into a service program.      */
+/*                                                                            */
+/******************************************************************************/
+
+             PGM
+
+/*      Configuration adjustable parameters.                                  */
+
+             DCL        VAR(&SRCLIB) TYPE(*CHAR) LEN(10) +
+                          VALUE('ZLIB')                         /* Source library. */
+             DCL        VAR(&SRCFILE) TYPE(*CHAR) LEN(10) +
+                          VALUE('SOURCES')                      /* Source member file. */
+             DCL        VAR(&CTLFILE) TYPE(*CHAR) LEN(10) +
+                          VALUE('TOOLS')                        /* Control member file. */
+
+             DCL        VAR(&MODLIB) TYPE(*CHAR) LEN(10) +
+                          VALUE('ZLIB')                         /* Module library. */
+
+             DCL        VAR(&SRVLIB) TYPE(*CHAR) LEN(10) +
+                          VALUE('LGPL')                         /* Service program library. */
+
+             DCL        VAR(&CFLAGS) TYPE(*CHAR) +
+                          VALUE('OPTIMIZE(40)')                 /* Compile options. */
+
+
+/*      Working storage.                                                      */
+
+             DCL        VAR(&CMDLEN) TYPE(*DEC) LEN(15 5) VALUE(300)    /* Command length. */
+             DCL        VAR(&CMD) TYPE(*CHAR) LEN(512)
+
+
+/*      Compile sources into modules.                                         */
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/ADLER32)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/COMPRESS)              SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/CRC32)                 SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/DEFLATE)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/GZIO)                  SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFBACK)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFFAST)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFLATE)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/INFTREES)              SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/TREES)                 SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/UNCOMPR)               SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+             CHGVAR     VAR(&CMD) VALUE('CRTCMOD MODULE(' *TCAT &MODLIB *TCAT  +
+                        '/ZUTIL)                 SRCFILE(' *TCAT               +
+                        &SRCLIB *TCAT '/' *TCAT &SRCFILE *TCAT                 +
+                        ') SYSIFCOPT(*IFSIO)' *BCAT &CFLAGS)
+             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
+
+
+/*      Link modules into a service program.                                  */
+
+             CRTSRVPGM  SRVPGM(&SRVLIB/ZLIB) +
+                          MODULE(&MODLIB/ADLER32     &MODLIB/COMPRESS    +
+                                 &MODLIB/CRC32       &MODLIB/DEFLATE     +
+                                 &MODLIB/GZIO        &MODLIB/INFBACK     +
+                                 &MODLIB/INFFAST     &MODLIB/INFLATE     +
+                                 &MODLIB/INFTREES    &MODLIB/TREES       +
+                                 &MODLIB/UNCOMPR     &MODLIB/ZUTIL)      +
+                          SRCFILE(&SRCLIB/&CTLFILE) SRCMBR(BNDSRC) +
+                          TEXT('ZLIB 1.2.0.7') TGTRLS(V4R4M0)
+
+             ENDPGM

as400/readme.txt

+        ZLIB version 1.2.0.7 for AS400 installation instructions
+
+I) From an AS400 *SAVF file:
+
+1)      Unpacking archive to an AS400 save file
+
+On the AS400:
+
+_       Create the ZLIB AS400 library:
+
+        CRTLIB LIB(ZLIB) TYPE(PROD) TEXT('ZLIB compression API library')
+
+_       Create a work save file, for example:
+
+                CRTSAVF FILE(ZLIB/ZLIBSAVF)
+
+On a PC connected to the target AS400:
+
+_       Unpack the save file image to a PC file "ZLIBSAVF"
+_       Upload this file into the save file on the AS400, for example
+                using ftp in BINARY mode.
+
+
+2)      Populating the ZLIB AS400 source library
+
+On the AS400:
+
+_       Extract the saved objects into the ZLIB AS400 library using:
+
+RSTOBJ OBJ(*ALL) SAVLIB(ZLIB) DEV(*SAVF) SAVF(ZLIB/ZLIBSAVF) RSTLIB(ZLIB)
+
+
+3)      Customize installation:
+
+_       Edit CL member ZLIB/TOOLS(COMPILE) and change parameters if needed,
+                according to the comments.
+
+_       Compile this member with:
+
+        CRTCLPGM PGM(ZLIB/COMPILE) SRCFILE(ZLIB/TOOLS) SRCMBR(COMPILE)
+
+
+4)      Compile and generate the service program:
+
+_       This can now be done by executing:
+
+        CALL PGM(ZLIB/COMPILE)
+
+
+
+II) From the original source distribution:
+
+1)      On the AS400, create the source library:
+
+        CRTLIB LIB(ZLIB) TYPE(PROD) TEXT('ZLIB compression API library')
+
+2)      Create the source files:
+
+        CRTSRCPF FILE(ZLIB/SOURCES) RCDLEN(112) TEXT('ZLIB library modules')
+        CRTSRCPF FILE(ZLIB/H)       RCDLEN(112) TEXT('ZLIB library includes')
+        CRTSRCPF FILE(ZLIB/TOOLS)   RCDLEN(112) TEXT('ZLIB library control utilities')
+
+3)      From the machine hosting the distribution files, upload them (with
+                FTP in text mode, for example) according to the following table:
+
+    Original    AS400   AS400    AS400 AS400
+    file        file    member   type  description
+                SOURCES                Original ZLIB C subprogram sources
+    adler32.c           ADLER32  C     ZLIB - Compute the Adler-32 checksum of a dta strm
+    compress.c          COMPRESS C     ZLIB - Compress a memory buffer
+    crc32.c             CRC32    C     ZLIB - Compute the CRC-32 of a data stream
+    deflate.c           DEFLATE  C     ZLIB - Compress data using the deflation algorithm
+    gzio.c              GZIO     C     ZLIB - IO on .gz files
+    infback.c           INFBACK  C     ZLIB - Inflate using a callback interface
+    inffast.c           INFFAST  C     ZLIB - Fast proc. literals & length/distance pairs
+    inflate.c           INFLATE  C     ZLIB - Interface to inflate modules
+    inftrees.c          INFTREES C     ZLIB - Generate Huffman trees for efficient decode
+    trees.c             TREES    C     ZLIB - Output deflated data using Huffman coding
+    uncompr.c           UNCOMPR  C     ZLIB - Decompress a memory buffer
+    zutil.c             ZUTIL    C     ZLIB - Target dependent utility functions
+                H                      Original ZLIB C and ILE/RPG include files
+    crc32.h             CRC32    C     ZLIB - CRC32 tables
+    deflate.h           DEFLATE  C     ZLIB - Internal compression state
+    inffast.h           INFFAST  C     ZLIB - Header to use inffast.c
+    inffixed.h          INFFIXED C     ZLIB - Table for decoding fixed codes
+    inflate.h           INFLATE  C     ZLIB - Internal inflate state definitions
+    inftrees.h          INFTREES C     ZLIB - Header to use inftrees.c
+    trees.h             TREES    C     ZLIB - Created automatically with -DGEN_TREES_H
+    zconf.h             ZCONF    C     ZLIB - Compression library configuration
+    zlib.h              ZLIB     C     ZLIB - Compression library C user interface
+    as400/zlib.inc      ZLIB.INC RPGLE ZLIB - Compression library ILE RPG user interface
+    zutil.h             ZUTIL    C     ZLIB - Internal interface and configuration
+                TOOLS                  Building source software & AS/400 README
+    as400/bndsrc        BNDSRC         Entry point exportation list
+    as400/compile.clp   COMPILE  CLP   Compile sources & generate service program
+    as400/readme.txt    README   TXT   Installation instructions
+
+4)      Continue as in I)3).
+
+
+
+
+Notes:  For AS400 ILE RPG programmers, a /copy member defining the ZLIB
+                API prototypes for ILE RPG can be found in ZLIB/H(ZLIB.INC).
+                Please read comments in this member for more information.
+
+        Remember that most foreign textual data are ASCII coded: this
+                implementation does not handle conversion from/to ASCII, so
+                text data code conversions must be done explicitely.
+
+        Always open zipped files in binary mode.

configure

@@ -53,6 +53,7 @@ case "$1" in
     -l* | --l*) libdir="$2"; shift; shift;;
     -i* | --i*) includedir="$2"; shift; shift;;
     -s* | --s*) shared=1; shift;;
+    *) echo "unknown option: $1"; echo "$0 --help for help"; exit 1;;
     esac
 done
 
@@ -76,6 +77,8 @@ if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
   CFLAGS="$cflags"
   case `(uname -s || echo unknown) 2>/dev/null` in
   Linux | linux) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
+  CYGWIN* | Cygwin* | cygwin* )
+             EXE='.exe';;
   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
          # (alain.bonnefoy@icbt.com)
                  LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"};;
@@ -188,11 +191,8 @@ fi
 
 cat > $test.c <<EOF
 #include <stdio.h>
-#include <stdlib.h>
-
-#if (defined(__MSDOS__) || defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)) && !defined(STDC)
-#  define STDC
-#endif
+#include <stdarg.h>
+#include "zconf.h"
 
 int main()
 {
@@ -205,7 +205,7 @@ int main()
 EOF
 
 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
-  echo "Checking whether to use vsnprintf() or snprintf()... using vsnprintf()"
+  echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()"
 
   cat > $test.c <<EOF
 #include <stdio.h>
@@ -228,7 +228,7 @@ int main()
 }
 EOF
 
-  if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
     echo "Checking for vsnprintf() in stdio.h... Yes."
 
     cat >$test.c <<EOF
@@ -237,14 +237,14 @@ EOF
 
 int mytest(char *fmt, ...)
 {
-  int i;
+  int n;
   char buf[20];
   va_list ap;
 
   va_start(ap, fmt);
-  i = vsnprintf(buf, sizeof(buf), fmt, ap);
+  n = vsnprintf(buf, sizeof(buf), fmt, ap);
   va_end(ap);
-  return 0;
+  return n;
 }
 
 int main()
@@ -275,14 +275,14 @@ EOF
 
 int mytest(char *fmt, ...)
 {
-  int i;
+  int n;
   char buf[20];
   va_list ap;
 
   va_start(ap, fmt);
-  i = vsprintf(buf, fmt, ap);
+  n = vsprintf(buf, fmt, ap);
   va_end(ap);
-  return 0;
+  return n;
 }
 
 int main()
@@ -302,11 +302,10 @@ EOF
     fi
   fi
 else
-  echo "Checking whether to use vsnprintf() or snprintf()... using snprintf()"
+  echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()"
 
   cat >$test.c <<EOF
 #include <stdio.h>
-#include <stdarg.h>
 
 int mytest()
 {
@@ -322,20 +321,17 @@ int main()
 }
 EOF
 
-  if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
     echo "Checking for snprintf() in stdio.h... Yes."
 
     cat >$test.c <<EOF
 #include <stdio.h>
-#include <stdarg.h>
 
-int mytest(char *fmt, ...)
+int mytest()
 {
-  int i;
   char buf[20];
 
-  i = snprintf(buf, sizeof(buf), "%s", "foo");
-  return 0;
+  return snprintf(buf, sizeof(buf), "%s", "foo");
 }
 
 int main()
@@ -362,15 +358,12 @@ EOF
 
     cat >$test.c <<EOF
 #include <stdio.h>
-#include <stdarg.h>
 
-int mytest(char *fmt, ...)
+int mytest()
 {
-  int i;
   char buf[20];
 
-  i = sprintf(buf, "%s", "foo");
-  return 0;
+  return sprintf(buf, "%s", "foo");
 }
 
 int main()
@@ -428,7 +421,7 @@ case $CFLAGS in
     fi;;
 esac
 
-rm -f $test.[co] $test$shared_ext
+rm -f $test.[co] $test $test$shared_ext
 
 # udpate Makefile
 sed < Makefile.in "
@@ -442,6 +435,7 @@ sed < Makefile.in "
 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
 /^AR *=/s#=.*#=$AR#
 /^RANLIB *=/s#=.*#=$RANLIB#
+/^EXE *=/s#=.*#=$EXE#
 /^prefix *=/s#=.*#=$prefix#
 /^exec_prefix *=/s#=.*#=$exec_prefix#
 /^libdir *=/s#=.*#=$libdir#

contrib/README.contrib

@@ -5,62 +5,66 @@ for help about these, not the zlib authors. Thanks.
 
 
 ada/        by Dmitriy Anisimkov <anisimkov@yahoo.com>
-	Support for Ada
-	See http://zlib-ada.sourceforge.net/
+        Support for Ada
+        See http://zlib-ada.sourceforge.net/
 
-asm586/ and asm686/ by Brian Raiter <breadbox@muppetlabs.com>
-	asm code for Pentium and PPro/PII, using the AT&T (GNU as) syntax
-	See http://www.muppetlabs.com/~breadbox/software/assembly.html
+asm586/
+asm686/     by Brian Raiter <breadbox@muppetlabs.com>
+        asm code for Pentium and PPro/PII, using the AT&T (GNU as) syntax
+        See http://www.muppetlabs.com/~breadbox/software/assembly.html
 
 blast/      by Mark Adler <madler@alumni.caltech.edu>
-	Decompressor for output of PKWare Data Compression Library (DCL)
+        Decompressor for output of PKWare Data Compression Library (DCL)
 
 delphi/     by Cosmin Truta <cosmint@cs.ubbcluj.ro>
-	Support for Delphi and C++ Builder
+        Support for Delphi and C++ Builder
+
+gzappend/   by Mark Adler <madler@alumni.caltech.edu>
+        append to a gzip file -- illustrates the use of Z_BLOCK
 
 infback9/   by Mark Adler <madler@alumni.caltech.edu>
         Unsupported diffs to infback to decode the deflate64 format
 
 inflate86/  by Chris Anderson <christop@charm.net>
-	Tuned x86 gcc asm code to replace inflate_fast()
+        Tuned x86 gcc asm code to replace inflate_fast()
 
 iostream/   by Kevin Ruland <kevin@rodin.wustl.edu>
-	A C++ I/O streams interface to the zlib gz* functions
+        A C++ I/O streams interface to the zlib gz* functions
 
 iostream2/  by Tyge Lvset <Tyge.Lovset@cmr.no>
-	Another C++ I/O streams interface
+        Another C++ I/O streams interface
 
 iostream3/  by Ludwig Schwardt <schwardt@sun.ac.za>
             and Kevin Ruland <kevin@rodin.wustl.edu>
-	Yet another C++ I/O streams interface
+        Yet another C++ I/O streams interface
 
 masm686/    by Dan Higdon <hdan@kinesoft.com>
             and Chuck Walbourn <chuckw@kinesoft.com>
-	asm code for Pentium Pro/PII, using the MASM syntax
+        asm code for Pentium Pro/PII, using the MASM syntax
 
 masmx86/    by Gilles Vollant <info@winimage.com>
-	x86 asm code to replace longest_match() and inflate_fast(),
-	for Visual C++ and MASM
+        x86 asm code to replace longest_match() and inflate_fast(),
+        for Visual C++ and MASM
 
 minizip/    by Gilles Vollant <info@winimage.com>
-	Mini zip and unzip based on zlib
-	See http://www.winimage.com/zLibDll/unzip.html
+        Mini zip and unzip based on zlib
+        See http://www.winimage.com/zLibDll/unzip.html
 
 pascal/     by Bob Dellaca <bobdl@xtra.co.nz> et al.
-	Support for Pascal
+        Support for Pascal
 
 puff/       by Mark Adler <madler@alumni.caltech.edu>
-	Small, low memory usage inflate.  Also serves to provide an
-	unambiguous description of the deflate format.
+        Small, low memory usage inflate.  Also serves to provide an
+        unambiguous description of the deflate format.
 
 testzlib/   by Gilles Vollant <info@winimage.com>
-	Example of the use of zlib
+        Example of the use of zlib
 
 untgz/      by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
-	A very simple tar.gz file extractor using zlib
+        A very simple tar.gz file extractor using zlib
 
 visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
-	How to use compress(), uncompress() and the gz* functions from VB
+        How to use compress(), uncompress() and the gz* functions from VB
 
 vstudio/    by Gilles Vollant <info@winimage.com>
-	Building zlib with Visual Studio .NET
+        Building zlib with Visual Studio .NET

contrib/ada/zlib-thin.ads

@@ -146,6 +146,17 @@ private package ZLib.Thin is
       strategy : Int)
       return     Int;       -- zlib.h:506
 
+   function deflateBound
+     (strm     : Z_Streamp;
+      sourceLen : ULong)
+      return     Int;       -- zlib.h:595
+
+   function deflatePrime
+     (strm     : Z_Streamp;
+      bits     : Int;
+      value    : Int)
+      return     Int;       -- zlib.h:604
+
    function inflateSetDictionary
      (strm       : Z_Streamp;
       dictionary : Byte_Access;
@@ -421,6 +432,8 @@ private
    pragma Import (C, deflateCopy, "deflateCopy");
    pragma Import (C, deflateReset, "deflateReset");
    pragma Import (C, deflateParams, "deflateParams");
+   pragma Import (C, deflateBound, "deflateBound");
+   pragma Import (C, deflatePrime, "deflatePrime");
    pragma Import (C, inflateSetDictionary, "inflateSetDictionary");
    pragma Import (C, inflateSync, "inflateSync");
    pragma Import (C, inflateReset, "inflateReset");

contrib/delphi/ZLib.pas

@@ -152,7 +152,7 @@ procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
   const OutBuf: Pointer; BufSize: Integer);
 
 const
-  zlib_version = '1.2.0';
+  zlib_version = '1.2.1';
 
 type
   EZlibError = class(Exception);

contrib/gzappend/gzappend.c

+/* gzappend -- command to append to a gzip file
+
+  Copyright (C) 2003 Mark Adler, all rights reserved
+  version 1.1, 4 Nov 2003
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the author be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Mark Adler    madler@alumni.caltech.edu
+ */
+
+/*
+ * Change history:
+ *
+ * 1.0  19 Oct 2003     - First version
+ * 1.1   4 Nov 2003     - Expand and clarify some comments and notes
+ *                      - Add version and copyright to help
+ *                      - Send help to stdout instead of stderr
+ *                      - Add some preemptive typecasts
+ *                      - Add L to constants in lseek() calls
+ *                      - Remove some debugging information in error messages
+ *                      - Use new data_type definition for zlib 1.2.1
+ *                      - Simplfy and unify file operations
+ *                      - Finish off gzip file in gztack()
+ *                      - Use deflatePrime() instead of adding empty blocks
+ *                      - Keep gzip file clean on appended file read errors
+ *                      - Use in-place rotate instead of auxiliary buffer
+ *                        (Why you ask?  Because it was fun to write!)
+ */
+
+/*
+   gzappend takes a gzip file and appends to it, compressing files from the
+   command line or data from stdin.  The gzip file is written to directly, to
+   avoid copying that file, in case it's large.  Note that this results in the
+   unfriendly behavior that if gzappend fails, the gzip file is corrupted.
+
+   This program was written to illustrate the use of the new Z_BLOCK option of
+   zlib 1.2.1's inflate() function.  This option returns from inflate() at each
+   block boundary to facilitate locating and modifying the last block bit at
+   the start of the final deflate block.  Also whether using Z_BLOCK or not,
+   another required feature of zlib 1.2.1 is that inflate() now provides the
+   number of unusued bits in the last input byte used.  gzappend will not work
+   with versions of zlib earlier than 1.2.1.
+
+   gzappend first decompresses the gzip file internally, discarding all but
+   the last 32K of uncompressed data, and noting the location of the last block
+   bit and the number of unused bits in the last byte of the compressed data.
+   The gzip trailer containing the CRC-32 and length of the uncompressed data
+   is verified.  This trailer will be later overwritten.
+
+   Then the last block bit is cleared by seeking back in the file and rewriting
+   the byte that contains it.  Seeking forward, the last byte of the compressed
+   data is saved along with the number of unused bits to initialize deflate.
+
+   A deflate process is initialized, using the last 32K of the uncompressed
+   data from the gzip file to initialize the dictionary.  If the total
+   uncompressed data was less than 32K, then all of it is used to initialize
+   the dictionary.  The deflate output bit buffer is also initialized with the
+   last bits from the original deflate stream.  From here on, the data to
+   append is simply compressed using deflate, and written to the gzip file.
+   When that is complete, the new CRC-32 and uncompressed length are written
+   as the trailer of the gzip file.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "zlib.h"
+
+#define local static
+#define LGCHUNK 14
+#define CHUNK (1U << LGCHUNK)
+#define DSIZE 32768U
+
+/* print an error message and terminate with extreme prejudice */
+local void bye(char *msg1, char *msg2)
+{
+    fprintf(stderr, "gzappend error: %s%s\n", msg1, msg2);
+    exit(1);
+}
+
+/* return the greatest common divisor of a and b using Euclid's algorithm,
+   modified to be fast when one argument much greater than the other, and
+   coded to avoid unnecessary swapping */
+local unsigned gcd(unsigned a, unsigned b)
+{
+    unsigned c;
+
+    while (a && b)
+        if (a > b) {
+            c = b;
+            while (a - c >= c)
+                c <<= 1;
+            a -= c;
+        }
+        else {
+            c = a;
+            while (b - c >= c)
+                c <<= 1;
+            b -= c;
+        }
+    return a + b;
+}
+
+/* rotate list[0..len-1] left by rot positions, in place */
+local void rotate(unsigned char *list, unsigned len, unsigned rot)
+{
+    unsigned char tmp;
+    unsigned cycles;
+    unsigned char *start, *last, *to, *from;
+
+    /* normalize rot and handle degenerate cases */
+    if (len < 2) return;
+    if (rot >= len) rot %= len;
+    if (rot == 0) return;
+
+    /* pointer to last entry in list */
+    last = list + (len - 1);
+
+    /* do simple left shift by one */
+    if (rot == 1) {
+        tmp = *list;
+        memcpy(list, list + 1, len - 1);
+        *last = tmp;
+        return;
+    }
+
+    /* do simple right shift by one */
+    if (rot == len - 1) {
+        tmp = *last;
+        memmove(list + 1, list, len - 1);
+        *list = tmp;
+        return;
+    }
+
+    /* otherwise do rotate as a set of cycles in place */
+    cycles = gcd(len, rot);             /* number of cycles */
+    do {
+        start = from = list + cycles;   /* start index is arbitrary */
+        tmp = *from;                    /* save entry to be overwritten */
+        for (;;) {
+            to = from;                  /* next step in cycle */
+            from += rot;                /* go right rot positions */
+            if (from > last) from -= len;   /* (pointer better not wrap) */
+            if (from == start) break;   /* all but one shifted */
+            *to = *from;                /* shift left */
+        }
+        *to = tmp;                      /* complete the circle */
+    } while (--cycles);
+}
+
+/* structure for gzip file read operations */
+typedef struct {
+    int fd;                     /* file descriptor */
+    int size;              	/* 1 << size is bytes in buf */
+    unsigned left;              /* bytes available at next */
+    unsigned char *buf;         /* buffer */
+    unsigned char *next;        /* next byte in buffer */
+    char *name;                 /* file name for error messages */
+} file;
+
+/* reload buffer */
+local int readin(file *in)
+{
+    int len;
+
+    len = read(in->fd, in->buf, 1 << in->size);
+    if (len == -1) bye("error reading ", in->name);
+    in->left = (unsigned)len;
+    in->next = in->buf;
+    return len;
+}
+
+/* read from file in, exit if end-of-file */
+local int readmore(file *in)
+{
+    if (readin(in) == 0) bye("unexpected end of ", in->name);
+    return 0;
+}
+
+#define read1(in) (in->left == 0 ? readmore(in) : 0, \
+                   in->left--, *(in->next)++)
+
+/* skip over n bytes of in */
+local void skip(file *in, unsigned n)
+{
+    unsigned bypass;
+
+    if (n > in->left) {
+        n -= in->left;
+        bypass = n & ~((1U << in->size) - 1);
+        if (bypass) {
+            if (lseek(in->fd, (off_t)bypass, SEEK_CUR) == -1)
+                bye("seeking ", in->name);
+            n -= bypass;
+        }
+        readmore(in);
+        if (n > in->left)
+            bye("unexpected end of ", in->name);
+    }
+    in->left -= n;
+    in->next += n;
+}
+
+/* read a four-byte unsigned integer, little-endian, from in */
+unsigned long read4(file *in)
+{
+    unsigned long val;
+
+    val = read1(in);
+    val += (unsigned)read1(in) << 8;
+    val += (unsigned long)read1(in) << 16;
+    val += (unsigned long)read1(in) << 24;
+    return val;
+}
+
+/* skip over gzip header */
+local void gzheader(file *in)
+{
+    int flags;
+    unsigned n;
+
+    if (read1(in) != 31 || read1(in) != 139) bye(in->name, " not a gzip file");
+    if (read1(in) != 8) bye("unknown compression method in", in->name);
+    flags = read1(in);
+    if (flags & 0xe0) bye("unknown header flags set in", in->name);
+    skip(in, 6);
+    if (flags & 4) {
+        n = read1(in);
+        n += (unsigned)(read1(in)) << 8;
+        skip(in, n);
+    }
+    if (flags & 8) while (read1(in) != 0) ;
+    if (flags & 16) while (read1(in) != 0) ;
+    if (flags & 2) skip(in, 2);
+}
+
+/* decompress gzip file "name", return strm with a deflate stream ready to
+   continue compression of the data in the gzip file, and return a file
+   descriptor pointing to where to write the compressed data -- the deflate
+   stream is initialized to compress using level "level" */
+local int gzscan(char *name, z_stream *strm, int level)
+{
+    int ret, lastbit, left, full;
+    unsigned have;
+    unsigned long crc, tot;
+    unsigned char *window;
+    off_t lastoff, end;
+    file gz;
+
+    /* open gzip file */
+    gz.name = name;
+    gz.fd = open(name, O_RDWR, 0);
+    if (gz.fd == -1) bye("cannot open ", name);
+    gz.buf = malloc(CHUNK);
+    if (gz.buf == NULL) bye("out of memory", "");
+    gz.size = LGCHUNK;
+    gz.left = 0;
+
+    /* skip gzip header */
+    gzheader(&gz);
+
+    /* prepare to decompress */
+    window = malloc(DSIZE);
+    if (window == NULL) bye("out of memory", "");
+    strm->zalloc = Z_NULL;
+    strm->zfree = Z_NULL;
+    strm->opaque = Z_NULL;
+    ret = inflateInit2(strm, -15);
+    if (ret != Z_OK) bye("out of memory", " or library mismatch");
+
+    /* decompress the deflate stream, saving append information */
+    lastbit = 0;
+    lastoff = lseek(gz.fd, 0L, SEEK_CUR) - gz.left;
+    left = 0;
+    strm->avail_in = gz.left;
+    strm->next_in = gz.next;
+    crc = crc32(0L, Z_NULL, 0);
+    have = full = 0;
+    do {
+        /* if needed, get more input */
+        if (strm->avail_in == 0) {
+            readmore(&gz);
+            strm->avail_in = gz.left;
+            strm->next_in = gz.next;
+        }
+
+        /* set up output to next available section of sliding window */
+        strm->avail_out = DSIZE - have;
+        strm->next_out = window + have;
+
+        /* inflate and check for errors */
+        ret = inflate(strm, Z_BLOCK);
+        if (ret == Z_STREAM_ERROR) bye("internal stream error!", "");
+        if (ret == Z_MEM_ERROR) bye("out of memory", "");
+        if (ret == Z_DATA_ERROR)
+            bye("invalid compressed data--format violated in", name);
+
+        /* update crc and sliding window pointer */
+        crc = crc32(crc, window + have, DSIZE - have - strm->avail_out);
+        if (strm->avail_out)
+            have = DSIZE - strm->avail_out;
+        else {
+            have = 0;
+            full = 1;
+        }
+
+        /* process end of block */
+        if (strm->data_type & 128) {
+            if (strm->data_type & 64)
+                left = strm->data_type & 0x1f;
+            else {
+                lastbit = strm->data_type & 0x1f;
+                lastoff = lseek(gz.fd, 0L, SEEK_CUR) - strm->avail_in;
+            }
+        }
+    } while (ret != Z_STREAM_END);
+    inflateEnd(strm);
+    gz.left = strm->avail_in;
+    gz.next = strm->next_in;
+
+    /* save the location of the end of the compressed data */
+    end = lseek(gz.fd, 0L, SEEK_CUR) - gz.left;
+
+    /* check gzip trailer and save total for deflate */
+    if (crc != read4(&gz))
+        bye("invalid compressed data--crc mismatch in ", name);
+    tot = strm->total_out;
+    if ((tot & 0xffffffffUL) != read4(&gz))
+        bye("invalid compressed data--length mismatch in", name);
+
+    /* if not at end of file, warn */
+    if (gz.left || readin(&gz))
+        fprintf(stderr,
+            "gzappend warning: junk at end of gzip file overwritten\n");
+
+    /* clear last block bit */
+    lseek(gz.fd, lastoff - (lastbit != 0), SEEK_SET);
+    if (read(gz.fd, gz.buf, 1) != 1) bye("reading after seek on ", name);
+    *gz.buf = (unsigned char)(*gz.buf ^ (1 << ((8 - lastbit) & 7)));
+    lseek(gz.fd, -1L, SEEK_CUR);
+    if (write(gz.fd, gz.buf, 1) != 1) bye("writing after seek to ", name);
+
+    /* if window wrapped, build dictionary from window by rotating */
+    if (full) {
+        rotate(window, DSIZE, have);
+        have = DSIZE;
+    }
+
+    /* set up deflate stream with window, crc, total_in, and leftover bits */
+    ret = deflateInit2(strm, level, Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY);
+    if (ret != Z_OK) bye("out of memory", "");
+    deflateSetDictionary(strm, window, have);
+    strm->adler = crc;
+    strm->total_in = tot;
+    if (left) {
+        lseek(gz.fd, --end, SEEK_SET);
+        if (read(gz.fd, gz.buf, 1) != 1) bye("reading after seek on ", name);
+        deflatePrime(strm, 8 - left, *gz.buf);
+    }
+    lseek(gz.fd, end, SEEK_SET);
+
+    /* clean up and return */
+    free(window);
+    free(gz.buf);
+    return gz.fd;
+}
+
+/* append file "name" to gzip file gd using deflate stream strm -- if last
+   is true, then finish off the deflate stream at the end */
+local void gztack(char *name, int gd, z_stream *strm, int last)
+{
+    int fd, len, ret;
+    unsigned left;
+    unsigned char *in, *out;
+
+    /* open file to compress and append */
+    fd = 0;
+    if (name != NULL) {
+        fd = open(name, O_RDONLY, 0);
+        if (fd == -1)
+            fprintf(stderr, "gzappend warning: %s not found, skipping ...\n",
+                    name);
+    }
+
+    /* allocate buffers */
+    in = fd == -1 ? NULL : malloc(CHUNK);
+    out = malloc(CHUNK);
+    if (out == NULL) bye("out of memory", "");
+
+    /* compress input file and append to gzip file */
+    do {
+        /* get more input */
+        len = fd == -1 ? 0 : read(fd, in, CHUNK);
+        if (len == -1) {
+            fprintf(stderr,
+                    "gzappend warning: error reading %s, skipping rest ...\n",
+                    name);
+            len = 0;
+        }
+        strm->avail_in = (unsigned)len;
+        strm->next_in = in;
+        if (len) strm->adler = crc32(strm->adler, in, (unsigned)len);
+
+        /* compress and write all available output */
+        do {
+            strm->avail_out = CHUNK;
+            strm->next_out = out;
+            ret = deflate(strm, last && len == 0 ? Z_FINISH : Z_NO_FLUSH);
+            left = CHUNK - strm->avail_out;
+            while (left) {
+                len = write(gd, out + CHUNK - strm->avail_out - left, left);
+                if (len == -1) bye("writing gzip file", "");
+                left -= (unsigned)len;
+            }
+        } while (strm->avail_out == 0 && ret != Z_STREAM_END);
+    } while (len != 0);
+
+    /* write trailer after last entry */
+    if (last) {
+        deflateEnd(strm);
+        out[0] = (unsigned char)(strm->adler);
+        out[1] = (unsigned char)(strm->adler >> 8);
+        out[2] = (unsigned char)(strm->adler >> 16);
+        out[3] = (unsigned char)(strm->adler >> 24);
+        out[4] = (unsigned char)(strm->total_in);
+        out[5] = (unsigned char)(strm->total_in >> 8);
+        out[6] = (unsigned char)(strm->total_in >> 16);
+        out[7] = (unsigned char)(strm->total_in >> 24);
+        len = 8;
+        do {
+            ret = write(gd, out + 8 - len, len);
+            if (ret == -1) bye("writing gzip file", "");
+            len -= ret;
+        } while (len);
+        close(gd);
+    }
+
+    /* clean up and return */
+    free(out);
+    if (in != NULL) free(in);
+    if (fd > 0) close(fd);
+}
+
+/* process the compression level option if present, scan the gzip file, and
+   append the specified files, or append the data from stdin if no other file
+   names are provided on the command line -- the gzip file must be writable
+   and seekable */
+int main(int argc, char **argv)
+{
+    int gd, level;
+    z_stream strm;
+
+    /* ignore command name */
+    argv++;
+
+    /* provide usage if no arguments */
+    if (*argv == NULL) {
+        printf("gzappend 1.1 (4 Nov 2003) Copyright (C) 2003 Mark Adler\n");
+        printf(
+            "usage: gzappend [-level] file.gz [ addthis [ andthis ... ]]\n");
+        return 0;
+    }
+
+    /* set compression level */
+    level = Z_DEFAULT_COMPRESSION;
+    if (argv[0][0] == '-') {
+        if (argv[0][1] < '0' || argv[0][1] > '9' || argv[0][2] != 0)
+            bye("invalid compression level", "");
+        level = argv[0][1] - '0';
+        if (*++argv == NULL) bye("no gzip file name after options", "");
+    }
+
+    /* prepare to append to gzip file */
+    gd = gzscan(*argv++, &strm, level);
+
+    /* append files on command line, or from stdin if none */
+    if (*argv == NULL)
+        gztack(NULL, gd, &strm, 1);
+    else
+        do {
+            gztack(*argv, gd, &strm, argv[1] == NULL);
+        } while (*++argv != NULL);
+    return 0;
+}

contrib/infback9/inftree9.c

@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate9_copyright[] =
-   " inflate9 1.2.0.7 Copyright 1995-2003 Mark Adler ";
+   " inflate9 1.2.0.8 Copyright 1995-2003 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, 71, 69};
+        133, 133, 133, 133, 144, 76, 203};
     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,

contrib/pascal/zlibpas.pas

@@ -10,7 +10,7 @@ unit zlibpas;
 interface
 
 const
-  ZLIB_VERSION = '1.2.0';
+  ZLIB_VERSION = '1.2.1';
 
 type
   alloc_func = function(opaque: Pointer; items, size: Integer): Pointer;
@@ -97,6 +97,7 @@ function deflateCopy(var dest, source: z_stream): Integer;
 function deflateReset(var strm: z_stream): Integer;
 function deflateParams(var strm: z_stream; level, strategy: Integer): Integer;
 function deflateBound(var strm: z_stream; sourceLen: LongInt): LongInt;
+function deflatePrime(var strm: z_stream; bits, value: Integer): Integer;
 function inflateInit2(var strm: z_stream; windowBits: Integer): Integer;
 function inflateSetDictionary(var strm: z_stream; const dictionary: PChar;
                               dictLength: Integer): Integer;

contrib/visual-basic.txt

@@ -67,3 +67,94 @@ Declare Function gzclose Lib "ZLIB32.DLL"
 -Jon Caruana
 jon-net@usa.net
 Microsoft Sitebuilder Network Level 1 Member - HTML Writer's Guild Member
+
+
+Here is another example from Michael <michael_borgsys@hotmail.com> that he
+says conforms to the VB guidelines, and that solves the problem of not
+knowing the uncompressed size by storing it at the end of the file:
+
+'Calling the functions:
+'bracket meaning: <parameter> [optional] {Range of possible values}
+'Call subCompressFile(<path with filename to compress> [, <path with
+filename to write to>, [level of compression {1..9}]])
+'Call subUncompressFile(<path with filename to compress>)
+
+Option Explicit
+Private lngpvtPcnSml As Long 'Stores value for 'lngPercentSmaller'
+Private Const SUCCESS As Long = 0
+Private Const strFilExt As String = ".cpr"
+Private Declare Function lngfncCpr Lib "zlib.dll" Alias "compress2" (ByRef
+dest As Any, ByRef destLen As Any, ByRef src As Any, ByVal srcLen As Long,
+ByVal level As Integer) As Long
+Private Declare Function lngfncUcp Lib "zlib.dll" Alias "uncompress" (ByRef
+dest As Any, ByRef destLen As Any, ByRef src As Any, ByVal srcLen As Long)
+As Long
+
+Public Sub subCompressFile(ByVal strargOriFilPth As String, Optional ByVal
+strargCprFilPth As String, Optional ByVal intLvl As Integer = 9)
+    Dim strCprPth As String
+    Dim lngOriSiz As Long
+    Dim lngCprSiz As Long
+    Dim bytaryOri() As Byte
+    Dim bytaryCpr() As Byte
+    lngOriSiz = FileLen(strargOriFilPth)
+    ReDim bytaryOri(lngOriSiz - 1)
+    Open strargOriFilPth For Binary Access Read As #1
+        Get #1, , bytaryOri()
+    Close #1
+    strCprPth = IIf(strargCprFilPth = "", strargOriFilPth, strargCprFilPth)
+'Select file path and name
+    strCprPth = strCprPth & IIf(Right(strCprPth, Len(strFilExt)) =
+strFilExt, "", strFilExt) 'Add file extension if not exists
+    lngCprSiz = (lngOriSiz * 1.01) + 12 'Compression needs temporary a bit
+more space then original file size
+    ReDim bytaryCpr(lngCprSiz - 1)
+    If lngfncCpr(bytaryCpr(0), lngCprSiz, bytaryOri(0), lngOriSiz, intLvl) =
+SUCCESS Then
+        lngpvtPcnSml = (1# - (lngCprSiz / lngOriSiz)) * 100
+        ReDim Preserve bytaryCpr(lngCprSiz - 1)
+        Open strCprPth For Binary Access Write As #1
+            Put #1, , bytaryCpr()
+            Put #1, , lngOriSiz 'Add the the original size value to the end
+(last 4 bytes)
+        Close #1
+    Else
+        MsgBox "Compression error"
+    End If
+    Erase bytaryCpr
+    Erase bytaryOri
+End Sub
+
+Public Sub subUncompressFile(ByVal strargFilPth As String)
+    Dim bytaryCpr() As Byte
+    Dim bytaryOri() As Byte
+    Dim lngOriSiz As Long
+    Dim lngCprSiz As Long
+    Dim strOriPth As String
+    lngCprSiz = FileLen(strargFilPth)
+    ReDim bytaryCpr(lngCprSiz - 1)
+    Open strargFilPth For Binary Access Read As #1
+        Get #1, , bytaryCpr()
+    Close #1
+    'Read the original file size value:
+    lngOriSiz = bytaryCpr(lngCprSiz - 1) * (2 ^ 24) _
+              + bytaryCpr(lngCprSiz - 2) * (2 ^ 16) _
+              + bytaryCpr(lngCprSiz - 3) * (2 ^ 8) _
+              + bytaryCpr(lngCprSiz - 4)
+    ReDim Preserve bytaryCpr(lngCprSiz - 5) 'Cut of the original size value
+    ReDim bytaryOri(lngOriSiz - 1)
+    If lngfncUcp(bytaryOri(0), lngOriSiz, bytaryCpr(0), lngCprSiz) = SUCCESS
+Then
+        strOriPth = Left(strargFilPth, Len(strargFilPth) - Len(strFilExt))
+        Open strOriPth For Binary Access Write As #1
+            Put #1, , bytaryOri()
+        Close #1
+    Else
+        MsgBox "Uncompression error"
+    End If
+    Erase bytaryCpr
+    Erase bytaryOri
+End Sub
+Public Property Get lngPercentSmaller() As Long
+    lngPercentSmaller = lngpvtPcnSml
+End Property

contrib/vstudio/vc7/zlibvc.def

@@ -53,7 +53,8 @@ EXPORTS
         deflateBound                             @47
         gzclearerr                               @48
         gzungetc                                 @49
-        zlibCompileFlags                         @50
+        zlibCompileFlags                         @50
+        deflatePrime                             @51
 
         unzOpen                                  @61
         unzClose                                 @62

deflate.c

@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.2.0.7 Copyright 1995-2003 Jean-loup Gailly ";
+   " deflate 1.2.0.8 Copyright 1995-2003 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
@@ -390,6 +390,18 @@ int ZEXPORT deflateReset (strm)
     return Z_OK;
 }
 
+/* ========================================================================= */
+int ZEXPORT deflatePrime (strm, bits, value)
+    z_streamp strm;
+    int bits;
+    int value;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    strm->state->bi_valid = bits;
+    strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
+    return Z_OK;
+}
+
 /* ========================================================================= */
 int ZEXPORT deflateParams(strm, level, strategy)
     z_streamp strm;

gzio.c

@@ -889,7 +889,13 @@ int ZEXPORT gzeof (file)
 {
     gz_stream *s = (gz_stream*)file;
 
-    return (s == NULL || s->mode != 'r') ? 0 : s->z_eof;
+    /* With concatenated compressed files that can have embedded
+     * crc trailers, z_eof is no longer the only/best indicator of EOF
+     * on a gz_stream. Handle end-of-stream error explicitly here.
+     */
+    if (s == NULL || s->mode != 'r') return 0;
+    if (s->z_eof) return 1;
+    return s->z_err == Z_STREAM_END;
 }
 
 /* ===========================================================================

inflate.c

@@ -568,7 +568,7 @@ int flush;
         switch (state->mode) {
         case HEAD:
             if (state->wrap == 0) {
-                state->mode = TYPE;
+                state->mode = TYPEDO;
                 break;
             }
             NEEDBITS(16);
@@ -1074,8 +1074,8 @@ int flush;
     if (state->wrap && out)
         strm->adler = state->check =
             UPDATE(state->check, strm->next_out - out, out);
-    strm->data_type = state->bits + (state->last ? 8 : 0) +
-                      (state->mode == TYPE ? 16 : 0);
+    strm->data_type = state->bits + (state->last ? 64 : 0) +
+                      (state->mode == TYPE ? 128 : 0);
     if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
         ret = Z_BUF_ERROR;
     return ret;

inftrees.c

@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate_copyright[] =
-   " inflate 1.2.0.7 Copyright 1995-2003 Mark Adler ";
+   " inflate 1.2.0.8 Copyright 1995-2003 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, 71, 69};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 76, 203};
     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,

minigzip.c

@@ -31,7 +31,7 @@
 #  include <sys/stat.h>
 #endif
 
-#if defined(MSDOS) || defined(OS2) || defined(WIN32)
+#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)

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.1.2.0.7" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.0.7"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.0.7"/>
-         <QPG:Add file="../libz.so.1.2.0.7" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.2.0.8" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.0.8"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.0.8"/>
+         <QPG:Add file="../libz.so.1.2.0.8" install="/opt/lib/" component="slib"/>
       </QPG:Files>
 
       <QPG:PackageFilter>
@@ -63,7 +63,7 @@
             </QPM:ProductDescription>
 
             <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.2.0.7</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.2.0.8</QPM:ReleaseVersion>
                <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
                <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
                <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>

win32/DLL_FAQ.txt

@@ -334,9 +334,9 @@ in the zlib distribution, or at the following location:
     link them in ZLIB1.DLL, and export them?
 
   - No.  A legitimate build of ZLIB1.DLL must not include code
-    that does not originate from the official zlib sources.  But
-    you can make your own private build, and give it a different
-    name, as suggested in the previous answer.
+    that does not originate from the official zlib source code.
+    But you can make your own private DLL build, under a different
+    file name, as suggested in the previous answer.
 
     For example, in Borland Delphi and C++ Builder, zlib is a part
     of the standard VCL library.  If an application links to VCL
@@ -345,7 +345,16 @@ in the zlib distribution, or at the following location:
     incompatible ZLIB1.DLL.
 
 
-14. I made my own ZLIB1.DLL build.  Can I test it for compliance?
+14. May I remove some functionality out of ZLIB1.DLL, by enabling
+    macros like NO_GZCOMPRESS or NO_GZIP at compile time?
+
+  - No.  A legitimate build of ZLIB1.DLL must provide the complete
+    zlib functionality, as implemented in the official zlib source
+    code.  But you can make your own private DLL build, under a
+    different file name, as suggested in the previous answer.
+
+
+15. I made my own ZLIB1.DLL build.  Can I test it for compliance?
 
   - We prefer that you download the official DLL from the zlib
     web site.  If you need something peculiar from this DLL, you
@@ -356,3 +365,7 @@ in the zlib distribution, or at the following location:
     Running these test programs is not a guarantee of compliance,
     but a failure can imply a detected problem.
 
+**
+
+This document is written and maintained by
+Cosmin Truta <cosmint@cs.ubbcluj.ro>

win32/zlib.def

@@ -14,6 +14,7 @@ EXPORTS
     deflateReset
     deflateParams
     deflateBound
+    deflatePrime
     inflateSetDictionary
     inflateSync
     inflateCopy

win32/zlib1.rc

@@ -5,8 +5,8 @@ VS_VERSION_INFO		VERSIONINFO
 #else
 VS_VERSION_INFO		VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
 #endif
-  FILEVERSION		1,2,0,7
-  PRODUCTVERSION	1,2,0,7
+  FILEVERSION		1,2,0,8
+  PRODUCTVERSION	1,2,0,8
   FILEFLAGSMASK		VS_FFI_FILEFLAGSMASK
 #ifdef _DEBUG
   FILEFLAGS		1
@@ -23,12 +23,12 @@ BEGIN
     //language ID = U.S. English, char set = Windows, Multilingual
     BEGIN
       VALUE "FileDescription",	"zlib data compression library\0"
-      VALUE "FileVersion",	"1.2.0.7\0"
+      VALUE "FileVersion",	"1.2.0.8\0"
       VALUE "InternalName",	"zlib1.dll\0"
       VALUE "LegalCopyright",	"(C) 1995-2003 Jean-loup Gailly & Mark Adler\0"
       VALUE "OriginalFilename",	"zlib1.dll\0"
       VALUE "ProductName",	"zlib\0"
-      VALUE "ProductVersion",	"1.2.0.7\0"
+      VALUE "ProductVersion",	"1.2.0.8\0"
       VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
     END
   END

zconf.h

@@ -23,6 +23,7 @@
 #  define deflateSetDictionary z_deflateSetDictionary
 #  define deflateCopy   z_deflateCopy
 #  define deflateReset  z_deflateReset
+#  define deflatePrime  z_deflatePrime
 #  define deflateParams z_deflateParams
 #  define deflateBound  z_deflateBound
 #  define inflateInit2_ z_inflateInit2_
@@ -105,6 +106,10 @@
 #  define STDC
 #endif
 
+#if defined(__OS400__) && !defined(STDC)    /* iSeries (formerly AS/400). */
+#  define STDC
+#endif
+
 #ifndef STDC
 #  ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
 #    define const       /* note: need a more gentle solution here */
@@ -287,11 +292,15 @@ typedef uLong FAR uLongf;
 #  define  z_off_t long
 #endif
 
-#if defined(__MVS__)
+#if defined(__OS400__)
 #define NO_vsnprintf
-#ifdef FAR
-#undef FAR
 #endif
+
+#if defined(__MVS__)
+#  define NO_vsnprintf
+#  ifdef FAR
+#    undef FAR
+#  endif
 #endif
 
 /* MVS linker does not support external names larger than 8 bytes */

zconf.in.h

@@ -23,6 +23,7 @@
 #  define deflateSetDictionary z_deflateSetDictionary
 #  define deflateCopy   z_deflateCopy
 #  define deflateReset  z_deflateReset
+#  define deflatePrime  z_deflatePrime
 #  define deflateParams z_deflateParams
 #  define deflateBound  z_deflateBound
 #  define inflateInit2_ z_inflateInit2_
@@ -105,6 +106,10 @@
 #  define STDC
 #endif
 
+#if defined(__OS400__) && !defined(STDC)    /* iSeries (formerly AS/400). */
+#  define STDC
+#endif
+
 #ifndef STDC
 #  ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
 #    define const       /* note: need a more gentle solution here */
@@ -287,11 +292,15 @@ typedef uLong FAR uLongf;
 #  define  z_off_t long
 #endif
 
-#if defined(__MVS__)
+#if defined(__OS400__)
 #define NO_vsnprintf
-#ifdef FAR
-#undef FAR
 #endif
+
+#if defined(__MVS__)
+#  define NO_vsnprintf
+#  ifdef FAR
+#    undef FAR
+#  endif
 #endif
 
 /* MVS linker does not support external names larger than 8 bytes */

zlib.3

-.TH ZLIB 3 "21 September 2003"
+.TH ZLIB 3 "4 November 2003"
 .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 1.2.0.7
+Version 1.2.0.8
 Copyright (C) 1995-2003 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP

zlib.h

 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.2.0.7, September 21st, 2003
+  version 1.2.0.8, November 4th, 2003
 
   Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
 
@@ -37,8 +37,8 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.2.0.7"
-#define ZLIB_VERNUM 0x1207
+#define ZLIB_VERSION "1.2.0.8"
+#define ZLIB_VERNUM 0x1208
 
 /*
      The 'zlib' compression library provides in-memory compression and
@@ -174,7 +174,7 @@ typedef z_stream FAR *z_streamp;
 #define Z_BINARY   0
 #define Z_ASCII    1
 #define Z_UNKNOWN  2
-/* Possible values of the data_type field */
+/* Possible values of the data_type field (though see inflate()) */
 
 #define Z_DEFLATED   8
 /* The deflate compression method (the only one supported in this version) */
@@ -373,12 +373,15 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
 
     The Z_BLOCK option assists in appending to or combining deflate streams.
   Also to assist in this, on return inflate() will set strm->data_type to the
-  number of unused bits in the last byte taken from strm->next_in, plus eight
+  number of unused bits in the last byte taken from strm->next_in, plus 64
   if inflate() is currently decoding the last block in the deflate stream,
-  plus 16 if inflate() returned immediately after decoding an end-of-block
-  code or decoding the complete header up just before the first byte of the
+  plus 128 if inflate() returned immediately after decoding an end-of-block
+  code or decoding the complete header up to just before the first byte of the
   deflate stream. The end-of-block will not be indicated until all of the
-  uncompressed data from that block has been written to strm->next_out.
+  uncompressed data from that block has been written to strm->next_out.  The
+  number of unused bits may in general be greater than seven, except when
+  bit 7 of data_type is set, in which case the number of unused bits will be
+  less than eight.
 
     inflate() should normally be called until it returns Z_STREAM_END or an
   error. However if all decompression is to be performed in a single step
@@ -598,6 +601,22 @@ ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
    for deflation in a single pass, and so would be called before deflate().
 */
 
+ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
+                                     int bits,
+                                     int value));
+/*
+     deflatePrime() inserts bits in the deflate output stream.  The intent
+  is that this function is used to start off the deflate output with the
+  bits leftover from a previous deflate stream when appending to it.  As such,
+  this function can only be used for raw deflate, and must be used before the
+  first deflate() call after a deflateInit2() or deflateReset().  bits must be
+  less than or equal to 16, and that many of the least significant bits of
+  value will be inserted in the output.
+
+      deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
 /*
 ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
                                      int  windowBits));