zlib 1.1.1

ChangeLog

@@ -1,7 +1,15 @@
 
 		ChangeLog file for zlib
 
-Changes in 1.1 (24 Feb 98)
+Changes in 1.1.1 (27 Feb 98)
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+  compression ratio on some files. This also allows inlining _tr_tally for
+  matches in deflate_slow.
+- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
+
+Changes in 1.1.0 (24 Feb 98)
 - do not return STREAM_END prematurely in inflate (John Bowler)
 - revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
 - compile with -DFASTEST to get compression code optimized for speed only

INDEX

@@ -13,6 +13,7 @@ descrip.mms		makefile for Vax/VMS
 zlib.3			mini man page for zlib (volunteers to write full
 			man pages from zlib.h welcome. write to jloup@gzip.org)
 
+msdos/Makefile.w32      makefile for Microsoft Visual C++ 32-bit
 msdos/Makefile.b32	makefile for Borland C++   32-bit
 msdos/Makefile.bor	makefile for Borland C/C++ 16-bit
 msdos/Makefile.dj2	makefile for DJGPP 2.x

Makefile

@@ -23,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.1.0
+VER=1.1.1
 LIBS=libz.a
 SHAREDLIB=libz.so
 

Makefile.in

@@ -23,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.1.0
+VER=1.1.1
 LIBS=libz.a
 SHAREDLIB=libz.so
 

README

@@ -1,4 +1,4 @@
-zlib 1.1.0 is a general purpose data compression library.  All the code
+zlib 1.1.1 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 
 ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
@@ -25,15 +25,14 @@ Mark Nelson wrote an article about zlib for the Jan. 1997 issue of
 Dr. Dobb's Journal; a copy of the article is available in
 http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.1.0 are documented in the file ChangeLog.
+The changes made in version 1.1.1 are documented in the file ChangeLog.
-The main changes since 1.0.9 are:
+The main changes since 1.1.0 are:
 
-- do not return STREAM_END prematurely in inflate (John Bowler)
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
-- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
+- remove block truncation heuristic which had very marginal effect for zlib
-- compile with -DFASTEST to get compression code optimized for speed only
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
-- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
+  compression ratio on some files. This also allows inlining _tr_tally for
-- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
+  matches in deflate_slow.
-  on Sun but significant on HP)
 
 
 Unsupported third party contributions are provided in directory "contrib".

deflate.c

@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.1.0 Copyright 1995-1998 Jean-loup Gailly ";
+   " deflate 1.1.1 Copyright 1995-1998 Jean-loup Gailly ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -1294,8 +1294,8 @@ local block_state deflate_slow(s, flush)
 
             check_match(s, s->strstart-1, s->prev_match, s->prev_length);
 
-            bflush = _tr_tally(s, s->strstart -1 - s->prev_match,
+            _tr_tally_dist(s, s->strstart -1 - s->prev_match,
-			       s->prev_length - MIN_MATCH);
+			   s->prev_length - MIN_MATCH, bflush);
 
             /* Insert in hash table all strings up to the end of the match.
              * strstart-1 and strstart are already inserted. If there is not
@@ -1322,7 +1322,7 @@ local block_state deflate_slow(s, flush)
              */
             Tracevv((stderr,"%c", s->window[s->strstart-1]));
 	    _tr_tally_lit(s, s->window[s->strstart-1], bflush);
-            if (bflush) {
+	    if (bflush) {
                 FLUSH_BLOCK_ONLY(s, 0);
             }
             s->strstart++;

deflate.h

@@ -310,9 +310,9 @@ void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
     flush = (s->last_lit == s->lit_bufsize-1); \
   }
 #else
-# define _tr_tally_lit(s, c, flush) _tr_tally(s, 0, c, flush)
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
 # define _tr_tally_dist(s, distance, length, flush) \
-              _tr_tally(s, distance, length, flush) 
+              flush = _tr_tally(s, distance, length) 
 #endif
 
 #endif

inftrees.c

@@ -7,7 +7,7 @@
 #include "inftrees.h"
 
 const char inflate_copyright[] =
-   " inflate 1.1.0 Copyright 1995-1998 Mark Adler ";
+   " inflate 1.1.1 Copyright 1995-1998 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot

msdos/Makefile.w32

@@ -0,0 +1,97 @@
+# Makefile for zlib
+# Microsoft 32-bit Visual C++ 4.0 or later (may work on earlier versions)
+
+# To use, do "nmake /f makefile.w32"
+
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to CFLAGS below: 
+#   -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Microsoft Visual C++ 4.0 and later -------------
+MODEL=
+CFLAGS=-Ox -GA3s -nologo -W3
+CC=cl
+LD=link
+LDFLAGS=
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+  trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+  trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+  infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+  infutil$(O)+inffast$(O)
+
+all:  zlib.lib example.exe minigzip.exe
+
+adler32.obj: adler32.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
+   infcodes.h infutil.h
+  $(CC) -c $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
+   infcodes.h inffast.h
+  $(CC) -c $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+  $(CC) -c $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+  $(CC) -c $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+  $(CC) -c $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+  $(CC) -c $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+zlib.lib: $(OBJ1) $(OBJ2)
+  if exist zlib.lib del zlib.lib
+  lib /OUT:zlib.lib $(OBJ1) $(OBJ2)
+
+example.exe: example.obj zlib.lib
+  $(LD) $(LDFLAGS) example.obj zlib.lib /OUT:example.exe /SUBSYSTEM:CONSOLE
+
+minigzip.exe: minigzip.obj zlib.lib
+  $(LD) $(LDFLAGS) minigzip.obj zlib.lib /OUT:minigzip.exe /SUBSYSTEM:CONSOLE
+
+test: example.exe minigzip.exe
+  example
+  echo hello world | minigzip | minigzip -d 
+
+#clean:
+#  del *.obj
+#  del *.exe

msdos/zlib.def

@@ -8,7 +8,7 @@ SUBSYSTEM	WINDOWS
 
 STUB		'WINSTUB.EXE'
 
-VERSION		1.1
+VERSION		1.11
 
 CODE		 EXECUTE READ
 

msdos/zlib.rc

@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,1,0,0
+  FILEVERSION	 1,1,1,0
-  PRODUCTVERSION 1,1,0,0
+  PRODUCTVERSION 1,1,1,0
   FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
   FILEFLAGS	0
   FILEOS	VOS_DOS_WINDOWS32
@@ -17,7 +17,7 @@ BEGIN
 
     BEGIN
       VALUE "FileDescription", "zlib data compression library\0"
-      VALUE "FileVersion",	"1.1.0\0"
+      VALUE "FileVersion",	"1.1.1\0"
       VALUE "InternalName",	"zlib\0"
       VALUE "OriginalFilename",	"zlib.dll\0"
       VALUE "ProductName",	"ZLib.DLL\0"

trees.c

@@ -1042,8 +1042,9 @@ int _tr_tally (s, dist, lc)
         s->dyn_dtree[d_code(dist)].Freq++;
     }
 
+#ifdef TRUNCATE_BLOCK
     /* Try to guess if it is profitable to stop the current block here */
-    if (s->level > 2 && (s->last_lit & 0xfff) == 0) {
+    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
         /* Compute an upper bound for the compressed length */
         ulg out_length = (ulg)s->last_lit*8L;
         ulg in_length = (ulg)((long)s->strstart - s->block_start);
@@ -1058,6 +1059,7 @@ int _tr_tally (s, dist, lc)
                100L - out_length*100L/in_length));
         if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
     }
+#endif
     return (s->last_lit == s->lit_bufsize-1);
     /* We avoid equality with lit_bufsize because of wraparound at 64K
      * on 16 bit machines and because stored blocks are restricted to

zlib.3

@@ -1,4 +1,4 @@
-.TH ZLIB 3 "24 February 1998"
+.TH ZLIB 3 "27 February 1998"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -81,7 +81,7 @@ These documents are also available in other formats from:
 .IP
 ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 .SH AUTHORS
-Version 1.1.0
+Version 1.1.1
 Copyright (C) 1995-1998 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP

zlib.h

@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.1.0, Feb 24th, 1998
+  version 1.1.1, Feb 27th, 1998
 
   Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
 
@@ -37,7 +37,7 @@ extern "C" {
 
 #include "zconf.h"
 
-#define ZLIB_VERSION "1.1.0"
+#define ZLIB_VERSION "1.1.1"
 
 /* 
      The 'zlib' compression library provides in-memory compression and