zlib 1.0.8

ChangeLog

@@ -1,6 +1,32 @@
 
 		ChangeLog file for zlib
 
+Changes in 1.0.8 (27 Jan 1998)
+- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
+- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
+- added compress2() to allow setting the compression level
+- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
+- use constant arrays for the static trees in trees.c instead of computing
+  them at run time (thanks to Ken Raeburn for this suggestion). To create
+  trees.h, compile with GEN_TREES_H and run "make test".
+- check return code of example in "make test" and display result
+- pass minigzip command line options to file_compress
+- simplifying code of inflateSync to avoid gcc 2.8 bug
+
+- support CC="gcc -Wall" in configure -s (QingLong)
+- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
+- fix test for shared library support to avoid compiler warnings
+- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
+- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
+- do not use fdopen for Metrowerks on Mac (Brad Pettit))
+- add checks for gzputc and gzputc in example.c
+- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
+- use const for the CRC table (Ken Raeburn)
+- fixed "make uninstall" for shared libraries
+- use Tracev instead of Trace in infblock.c
+- in example.c use correct compressed length for test_sync
+- suppress +vnocompatwarnings in configure for HPUX (not always supported)
+
 Changes in 1.0.7 (20 Jan 1998)
 - fix gzseek which was broken in write mode
 - return error for gzseek to negative absolute position
@@ -81,7 +107,6 @@ Changes in 1.0.6 (19 Jan 1998)
 - in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
 - Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
 - check for unistd.h in configure (for off_t)
-- use Tracev instead of Trace in infblock.c
 - remove useless check parameter in inflate_blocks_free
 - avoid useless assignment of s->check to itself in inflate_blocks_new
 - do not flush twice in gzclose (thanks to Ken Raeburn)

Makefile

@@ -5,6 +5,7 @@
 # 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 install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
 #    make install
@@ -22,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0.7
+VER=1.0.8
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -51,8 +52,13 @@ all: example minigzip
 
 test: all
 	@LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
-	./example ; \
-	echo hello world | ./minigzip | ./minigzip -d
+	echo hello world | ./minigzip | ./minigzip -d || \
+	  echo '		*** minigzip test FAILED ***' ; \
+	if ./example; then \
+	  echo '		*** zlib test OK ***'; \
+	else \
+	  echo '		*** zlib test FAILED ***'; \
+	fi
 
 libz.a: $(OBJS)
 	$(AR) $@ $(OBJS)
@@ -88,12 +94,16 @@ install: $(LIBS)
 # ldconfig is for Linux
 
 uninstall:
-	cd $(exec_prefix)/lib; rm -f $(LIBS); \
-	if test -f $(SHAREDLIB); then \
-	 v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p'<$(prefix)/include/zlib.h`;\
-	 rm -f $(SHAREDLIB).$$v $(SHAREDLIB); \
+	cd $(prefix)/include; \
+	v=$(VER); \
+	if test -f zlib.h; then \
+	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
+          rm -f zlib.h zconf.h; \
+	fi; \
+	cd $(exec_prefix)/lib; rm -f libz.a; \
+	if test -f $(SHAREDLIB).$$v; then \
+	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
 	fi
-	cdz $(prefix)/include; rm -f zlib.h zconf.h
 
 clean:
 	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
@@ -141,6 +151,6 @@ inflate.o: zutil.h zlib.h zconf.h infblock.h
 inftrees.o: zutil.h zlib.h zconf.h inftrees.h
 infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
 minigzip.o:  zlib.h zconf.h 
-trees.o: deflate.h zutil.h zlib.h zconf.h 
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
 uncompr.o: zlib.h zconf.h
 zutil.o: zutil.h zlib.h zconf.h  

Makefile.in

@@ -5,6 +5,7 @@
 # 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 install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
 #    make install
@@ -22,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.0.7
+VER=1.0.8
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -51,8 +52,13 @@ all: example minigzip
 
 test: all
 	@LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
-	./example ; \
-	echo hello world | ./minigzip | ./minigzip -d
+	echo hello world | ./minigzip | ./minigzip -d || \
+	  echo '		*** minigzip test FAILED ***' ; \
+	if ./example; then \
+	  echo '		*** zlib test OK ***'; \
+	else \
+	  echo '		*** zlib test FAILED ***'; \
+	fi
 
 libz.a: $(OBJS)
 	$(AR) $@ $(OBJS)
@@ -88,12 +94,16 @@ install: $(LIBS)
 # ldconfig is for Linux
 
 uninstall:
-	cd $(exec_prefix)/lib; rm -f $(LIBS); \
-	if test -f $(SHAREDLIB); then \
-	 v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p'<$(prefix)/include/zlib.h`;\
-	 rm -f $(SHAREDLIB).$$v $(SHAREDLIB); \
+	cd $(prefix)/include; \
+	v=$(VER); \
+	if test -f zlib.h; then \
+	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
+          rm -f zlib.h zconf.h; \
+	fi; \
+	cd $(exec_prefix)/lib; rm -f libz.a; \
+	if test -f $(SHAREDLIB).$$v; then \
+	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
 	fi
-	cdz $(prefix)/include; rm -f zlib.h zconf.h
 
 clean:
 	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
@@ -141,6 +151,6 @@ inflate.o: zutil.h zlib.h zconf.h infblock.h
 inftrees.o: zutil.h zlib.h zconf.h inftrees.h
 infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
 minigzip.o:  zlib.h zconf.h 
-trees.o: deflate.h zutil.h zlib.h zconf.h 
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
 uncompr.o: zlib.h zconf.h
 zutil.o: zutil.h zlib.h zconf.h  

README

@@ -1,15 +1,16 @@
-zlib 1.0.7 is a general purpose data compression library.  All the code
-is reentrant (thread safe).  The data format used by the zlib library
+zlib 1.0.8 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 
 ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
 format) and rfc1952.txt (gzip format). These documents are also available in
 other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 
-All functions of the compression library are documented in the file
-zlib.h. A usage example of the library is given in the file example.c
-which also tests that the library is working correctly. Another
-example is given in the file minigzip.c. The compression library itself
-is composed of all source files except example.c and minigzip.c.
+All functions of the compression library are documented in the file zlib.h
+(volunteer to write man pages welcome, contact [email protected]). A usage
+example of the library is given in the file example.c which also tests that
+the library is working correctly. Another example is given in the file
+minigzip.c. The compression library itself is composed of all source files
+except example.c and minigzip.c.
 
 To compile all files and run the test program, follow the instructions
 given at the top of Makefile. In short "make test; make install"
@@ -24,18 +25,18 @@ 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 1.0.7 are documented in the file ChangeLog.
-The main changes since 1.0.6 are:
+The changes made in version 1.0.8 are documented in the file ChangeLog.
+The main changes since 1.0.7 are:
 
-- fix gzseek which was broken in write mode
-- return error for gzseek to negative absolute position
-- fix configure for Linux (Chun-Chung Chen)
-- increase stack space for MSC (Tim Wegner)
-- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
-- define EXPORTVA for gzprintf (Gilles Vollant)
-- added mini man page zlib.3 (Rick Rodgers) [volunteers to write full
-  man pages from zlib.h most welcome. write to [email protected]]
-- for contrib/untgz, fix makedir() and improve Makefile
+- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
+- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
+- added compress2() to allow setting the compression level
+- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
+- use constant arrays for the static trees in trees.c instead of computing
+  them at run time (thanks to Ken Raeburn for this suggestion). To create
+  trees.h, compile with GEN_TREES_H and run "make test".
+- check return code of example in "make test" and display result
+- pass minigzip command line options to file_compress
 
 Unsupported third party contributions are provided in directory "contrib".
 
@@ -64,6 +65,9 @@ Notes for some targets:
   See contrib/visual-basic.txt for more information.
   I don't know how to handle structures in Visual Basic, sorry.
 
+- "make test" fails on Solaris 2.6 with gcc 2.8.0. It works with cc and
+   with gcc 2.7.2.1.
+
 - For 64-bit Irix, deflate.c must be compiled without any optimization.
   With -O, one libpng test fails. The test works in 32 bit mode (with
   the -n32 compiler flag). The compiler bug has been reported to SGI.
@@ -74,7 +78,10 @@ Notes for some targets:
 - zlib doesn't work on HP-UX 9.05 with one cc compiler (the one not
   accepting the -O option). It works with the other cc compiler.
 
-- gzdopen is not supported on RISCOS
+- For shared memory multiprocessors, the decompression code assumes that
+  writes to pointers are atomic.
+
+- gzdopen is not supported on RISCOS, BEOS and Mac
 
 - 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

compress.c

@@ -8,22 +8,22 @@
 #include "zlib.h"
 
 /* ===========================================================================
-     Compresses the source buffer into the destination buffer.  sourceLen is
-   the byte length of the source buffer. Upon entry, destLen is the total
-   size of the destination buffer, which must be at least 0.1% larger than
-   sourceLen plus 8 bytes. Upon exit, destLen is the actual size of the
-   compressed buffer.
-     This function can be used to compress a whole file at once if the
-   input file is mmap'ed.
-     compress returns Z_OK if success, Z_MEM_ERROR if there was not
-   enough memory, Z_BUF_ERROR if there was not enough room in the output
-   buffer.
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in deflateInit.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least 0.1% larger than sourceLen plus
+   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+   Z_STREAM_ERROR if the level parameter is invalid.
 */
-int EXPORT compress (dest, destLen, source, sourceLen)
+int EXPORT compress2 (dest, destLen, source, sourceLen, level)
     Bytef *dest;
     uLongf *destLen;
     const Bytef *source;
     uLong sourceLen;
+    int level;
 {
     z_stream stream;
     int err;
@@ -42,7 +42,7 @@ int EXPORT compress (dest, destLen, source, sourceLen)
     stream.zfree = (free_func)0;
     stream.opaque = (voidpf)0;
 
-    err = deflateInit(&stream, Z_DEFAULT_COMPRESSION);
+    err = deflateInit(&stream, level);
     if (err != Z_OK) return err;
 
     err = deflate(&stream, Z_FINISH);
@@ -55,3 +55,14 @@ int EXPORT compress (dest, destLen, source, sourceLen)
     err = deflateEnd(&stream);
     return err;
 }
+
+/* ===========================================================================
+ */
+int EXPORT compress (dest, destLen, source, sourceLen)
+    Bytef *dest;
+    uLongf *destLen;
+    const Bytef *source;
+    uLong sourceLen;
+{
+    return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
+}

configure

@@ -29,15 +29,23 @@ case "$1" in
   -h* | --h*) echo 'syntax: configure [ --shared ]'; exit 0;;
 esac
 
-test -z "$CC" && echo Checking for gcc...
 test=ztest$$
 cat > $test.c <<EOF
-int hello() { printf("hello\n"); }
+extern int getchar();
+int hello() {return getchar();}
 EOF
-if test -z "$CC" -o "$CC" = "gcc" && (gcc -c -O3 $test.c) 2>/dev/null; then
-  CC=gcc
+
+test -z "$CC" && echo Checking for gcc...
+cc=${CC-gcc}
+cflags=${CFLAGS-"-O3"}
+case "$cc" in
+  *gcc*) gcc=1;;
+esac
+
+if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
+  CC="$cc"
   SFLAGS=${CFLAGS-"-fPIC -O3"}
-  CFLAGS=${CFLAGS-"-O3"}
+  CFLAGS="$cflags"
   case `(uname -s || echo unknown) 2>/dev/null` in
   Linux | linux) LDSHARED=${LDSHARED-"gcc -shared -Wl,-soname,libz.so.1"};;
   *)             LDSHARED=${LDSHARED-"gcc -shared"};;
@@ -65,7 +73,8 @@ else
 	     LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;
   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
 	     CFLAGS=${CFLAGS-"-O"}
-	     LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
+#	     LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
+	     LDSHARED=${LDSHARED-"ld -b"}
 	     shared_ext='.sl'
 	     SHAREDLIB='libz.sl';;
   UNIX_System_V\ 4.2.0) 
@@ -108,14 +117,14 @@ fi
 
 # udpate Makefile
 sed < Makefile.in "
-/^CC *=/s,=.*,=$CC,
-/^CFLAGS *=/s/=.*/=$CFLAGS/
+/^CC *=/s%=.*%=$CC%
+/^CFLAGS *=/s%=.*%=$CFLAGS%
 /^LDSHARED *=/s%=.*%=$LDSHARED%
-/^LIBS *=/s,=.*,=$LIBS,
-/^SHAREDLIB *=/s,=.*,=$SHAREDLIB,
-/^AR *=/s,=.*,=$AR,
-/^RANLIB *=/s,=.*,=$RANLIB,
-/^VER *=/s/=.*/=$VER/
-/^prefix *=/s,=.*,=$prefix,
-/^exec_prefix *=/s,=.*,=$exec_prefix,
+/^LIBS *=/s%=.*%=$LIBS%
+/^SHAREDLIB *=/s%=.*%=$SHAREDLIB%
+/^AR *=/s%=.*%=$AR%
+/^RANLIB *=/s%=.*%=$RANLIB%
+/^VER *=/s%=.*%=$VER%
+/^prefix *=/s%=.*%=$prefix%
+/^exec_prefix *=/s%=.*%=$exec_prefix%
 " > Makefile

contrib/README.contrib

@@ -5,8 +5,7 @@ for help about these, not the zlib authors. Thanks.
 
 
 asm386/     by Gilles Vollant <[email protected]>
-	386 asm code replacing longest_match(). This code may be slower
-        than the C code if you have a good compiler.
+	386 asm code replacing longest_match(), for Visual C++ 4.2 and ML 6.11c
 
 iostream/   by Kevin Ruland <[email protected]>
         A C++ I/O streams interface to the zlib gz* functions