zlib 1.2.3.6
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 19deaa5..5ce81be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,6 @@
# Check to see if we have large file support
#
set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE)
-
# We add these other definitions here because CheckTypeSize.cmake
# in CMake 2.4.x does not automatically do so and we want
# compatibility with CMake 2.4.x.
@@ -34,9 +33,7 @@
if(HAVE_STDDEF_H)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)
endif()
-
check_type_size(off64_t OFF64_T)
-
if(HAVE_OFF64_T)
add_definitions(-D_LARGEFILE64_SOURCE)
endif()
@@ -63,23 +60,6 @@
endif()
#
-# Check for mmap support
-#
-set(mmap_test_code "
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-caddr_t hello() {
- return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);
-}
-int main() { return 0; }
-")
-check_c_source_compiles("${mmap_test_code}" USE_MMAP)
-if(USE_MMAP)
- add_definitions(-DUSE_MMAP)
-endif()
-
-#
# Create the zlibdefs.h file.
# Note: we create it in CMAKE_CURRENT_SOURCE_DIR instead
# of CMAKE_CURRENT_BINARY_DIR because an empty zlibdefs.h
@@ -88,7 +68,7 @@
${CMAKE_CURRENT_SOURCE_DIR}/zlibdefs.h)
if(MSVC)
- set(CMAKE_DEBUG_POSTFIX "D")
+ set(CMAKE_DEBUG_POSTFIX "d")
add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
endif()
@@ -130,15 +110,47 @@
trees.c
uncompr.c
zutil.c
+ win32/zlib1.rc
)
+# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)
+string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([0-9A-Za-z.]+)\".*"
+ "\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})
+
+if(MINGW)
+ # This gets us DLL resource information when compiling on MinGW.
+ add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
+ COMMAND windres.exe
+ -D GCC_WINDRES
+ -I ${CMAKE_CURRENT_SOURCE_DIR}
+ -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
+ -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
+ set(ZLIB_SRCS ${ZLIB_SRCS} ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
+endif(MINGW)
+
add_library(zlib ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
-set_target_properties(zlib PROPERTIES VERSION 1.2.3.4)
+
set_target_properties(zlib PROPERTIES SOVERSION 1)
+
+if(NOT CYGWIN)
+ # This property causes shared libraries on Linux to have the full version
+ # encoded into their final filename. We disable this on Cygwin because
+ # it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
+ # seems to be the default.
+ #
+ # This has no effect with MSVC, on that platform the version info for
+ # the DLL comes from the resource file win32/zlib1.rc
+ set_target_properties(zlib PROPERTIES VERSION ${ZLIB_FULL_VERSION})
+endif()
+
if(UNIX)
- # On unix like platforms the library is almost always called libz
+ # On unix-like platforms the library is almost always called libz
set_target_properties(zlib PROPERTIES OUTPUT_NAME z)
+elseif(BUILD_SHARED_LIBS AND WIN32)
+ # Creates zlib1.dll when building shared library version
+ set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
endif()
if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
diff --git a/ChangeLog b/ChangeLog
index 6e8ff5c..87e4339 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,27 @@
ChangeLog file for zlib
+Changes in 1.2.3.6 (17 Jan 2010)
+- Avoid void * arithmetic in gzread.c and gzwrite.c
+- Make compilers happier with const char * for gz_error message
+- Avoid unused parameter warning in inflate.c
+- Avoid signed-unsigned comparison warning in inflate.c
+- Indent #pragma's for traditional C
+- Fix usage of strwinerror() in glib.c, change to gz_strwinerror()
+- Correct email address in configure for system options
+- Update make_vms.com and add make_vms.com to contrib/minizip [Zinser]
+- Update zlib.map [Brown]
+- Fix Makefile.in for Solaris 10 make of example64 and minizip64 [Trk]
+- Apply various fixes to CMakeLists.txt [Lowman]
+- Add checks on len in gzread() and gzwrite()
+- Add error message for no more room for gzungetc()
+- Remove zlib version check in gzwrite()
+- Defer compression of gzprintf() result until need to
+- Use snprintf() in gzdopen() if available
+- Remove USE_MMAP configuration determination (only used by minigzip)
+- Remove examples/pigz.c (available separately)
+- Update examples/gun.c to 1.6
+
Changes in 1.2.3.5 (8 Jan 2010)
- Add space after #if in zutil.h for some compilers
- Fix relatively harmless bug in deflate_fast() [Exarevsky]
@@ -21,6 +42,7 @@
- Replace gzio.c with a new set of routines with the same functionality
- Add gzbuffer(), gzoffset(), gzclose_r(), gzclose_w() as part of above
- Update contrib/minizip to 1.1b
+- Change gzeof() to return 0 on error instead of -1 to agree with zlib.h
Changes in 1.2.3.4 (21 Dec 2009)
- Use old school .SUFFIXES in Makefile.in for FreeBSD compatibility
diff --git a/Makefile b/Makefile
index 0941228..9b81f23 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
# Makefile for zlib
-# Copyright (C) 1995-2006 Jean-loup Gailly.
+# Copyright (C) 1995-2010 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
@@ -32,7 +32,7 @@
STATICLIB=libz.a
SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.3.5
+SHAREDLIBV=libz.so.1.2.3.6
SHAREDLIBM=libz.so.1
LIBS=$(STATICLIB) $(SHAREDLIB) $(SHAREDLIBV)
@@ -124,10 +124,10 @@
rm -f _match.s
example64.o: example.c zlib.h zconf.h zlibdefs.h
- $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
+ $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ example.c
minigzip64.o: minigzip.c zlib.h zconf.h zlibdefs.h
- $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
+ $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ minigzip.c
.SUFFIXES: .lo
diff --git a/Makefile.in b/Makefile.in
index 0941228..9b81f23 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,5 +1,5 @@
# Makefile for zlib
-# Copyright (C) 1995-2006 Jean-loup Gailly.
+# Copyright (C) 1995-2010 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
@@ -32,7 +32,7 @@
STATICLIB=libz.a
SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.3.5
+SHAREDLIBV=libz.so.1.2.3.6
SHAREDLIBM=libz.so.1
LIBS=$(STATICLIB) $(SHAREDLIB) $(SHAREDLIBV)
@@ -124,10 +124,10 @@
rm -f _match.s
example64.o: example.c zlib.h zconf.h zlibdefs.h
- $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
+ $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ example.c
minigzip64.o: minigzip.c zlib.h zconf.h zlibdefs.h
- $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
+ $(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ minigzip.c
.SUFFIXES: .lo
diff --git a/README b/README
index e3a2170..741e000 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
ZLIB DATA COMPRESSION LIBRARY
-zlib 1.2.3.5 is a general purpose data compression library. All the code is
+zlib 1.2.3.6 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
@@ -33,7 +33,7 @@
issue of Dr. Dobb's Journal; a copy of the article is available in
http://dogma.net/markn/articles/zlibtool/zlibtool.htm
-The changes made in version 1.2.3.5 are documented in the file ChangeLog.
+The changes made in version 1.2.3.6 are documented in the file ChangeLog.
Unsupported third party contributions are provided in directory "contrib".
diff --git a/as400/zlib.inc b/as400/zlib.inc
index 38c47ac..7ecea98 100644
--- a/as400/zlib.inc
+++ b/as400/zlib.inc
@@ -1,7 +1,7 @@
* ZLIB.INC - Interface to the general purpose compression library
*
* ILE RPG400 version by Patrick Monnerat, DATASPHERE.
- * Version 1.2.3.5
+ * Version 1.2.3.6
*
*
* WARNING:
@@ -22,8 +22,8 @@
*
* Versioning information.
*
- D ZLIB_VERSION C '1.2.3.5'
- D ZLIB_VERNUM C X'1235'
+ D ZLIB_VERSION C '1.2.3.6'
+ D ZLIB_VERNUM C X'1236'
*
* Other equates.
*
diff --git a/configure b/configure
index b87dddc..261efa9 100755
--- a/configure
+++ b/configure
@@ -78,6 +78,9 @@
CC="$cc"
SFLAGS="${CFLAGS-"-O3"} -fPIC"
CFLAGS="${CFLAGS-"-O3"}"
+ if test "${ZLIBGCCWARN}" = "YES"; then
+ CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
+ fi
if test -z "$uname"; then
uname=`(uname -s || echo unknown) 2>/dev/null`
fi
@@ -154,8 +157,8 @@
SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
CFLAGS=${CFLAGS-"-O2"}
LDSHARED=${LDSHARED-"ld"} ;;
- SunStudio\ 9*) SFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
- CFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xtarget=ultra3 -xarch=v9b"}
+ SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
+ CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
UNIX_System_V\ 4.2.0)
SFLAGS=${CFLAGS-"-KPIC -O"}
@@ -173,7 +176,7 @@
SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
LDSHARED=${LDSHARED-"xlc -G"} ;;
- # send working options for other systems to support@gzip.org
+ # send working options for other systems to zlib@gzip.org
*) SFLAGS=${CFLAGS-"-O"}
CFLAGS=${CFLAGS-"-O"}
LDSHARED=${LDSHARED-"cc -shared"} ;;
@@ -488,22 +491,6 @@
SFLAGS="$SFLAGS -DNO_ERRNO_H"
fi
-cat > $test.c <<EOF
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-caddr_t hello() {
- return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);
-}
-EOF
-if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
- CFLAGS="$CFLAGS -DUSE_MMAP"
- SFLAGS="$SFLAGS -DUSE_MMAP"
- echo Checking for mmap support... Yes.
-else
- echo Checking for mmap support... No.
-fi
-
CPP=${CPP-"$CC -E"}
case $CFLAGS in
*ASMV*)
diff --git a/contrib/infback9/inftree9.c b/contrib/infback9/inftree9.c
index 9b0f46c..2d42f72 100644
--- a/contrib/infback9/inftree9.c
+++ b/contrib/infback9/inftree9.c
@@ -1,5 +1,5 @@
/* inftree9.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2008 Mark Adler
+ * Copyright (C) 1995-2010 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -9,7 +9,7 @@
#define MAXBITS 15
const char inflate9_copyright[] =
- " inflate9 1.2.3.5 Copyright 1995-2009 Mark Adler ";
+ " inflate9 1.2.3.6 Copyright 1995-2010 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@@ -64,7 +64,7 @@
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
- 133, 133, 133, 133, 144, 69, 199};
+ 133, 133, 133, 133, 144, 199, 70};
static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,
diff --git a/contrib/minizip/make_vms.com b/contrib/minizip/make_vms.com
new file mode 100644
index 0000000..548ee29
--- /dev/null
+++ b/contrib/minizip/make_vms.com
@@ -0,0 +1,25 @@
+$ if f$search("ioapi.h_orig") .eqs. "" then copy ioapi.h ioapi.h_orig
+$ open/write zdef vmsdefs.h
+$ copy sys$input: zdef
+$ deck
+#define unix
+#define fill_zlib_filefunc64_32_def_from_filefunc32 fillzffunc64from
+#define Write_Zip64EndOfCentralDirectoryLocator Write_Zip64EoDLocator
+#define Write_Zip64EndOfCentralDirectoryRecord Write_Zip64EoDRecord
+#define Write_EndOfCentralDirectoryRecord Write_EoDRecord
+$ eod
+$ close zdef
+$ copy vmsdefs.h,ioapi.h_orig ioapi.h
+$ cc/include=[--]/prefix=all ioapi.c
+$ cc/include=[--]/prefix=all miniunz.c
+$ cc/include=[--]/prefix=all unzip.c
+$ cc/include=[--]/prefix=all minizip.c
+$ cc/include=[--]/prefix=all zip.c
+$ link miniunz,unzip,ioapi,[--]libz.olb/lib
+$ link minizip,zip,ioapi,[--]libz.olb/lib
+$ mcr []minizip test minizip64_info.txt
+$ mcr []miniunz -l test.zip
+$ rename minizip64_info.txt; minizip64_info.txt_old
+$ mcr []miniunz test.zip
+$ delete test.zip;*
+$exit
diff --git a/contrib/vstudio/vc7/zlib.rc b/contrib/vstudio/vc7/zlib.rc
index 7bb4bb7..418eb7a 100644
--- a/contrib/vstudio/vc7/zlib.rc
+++ b/contrib/vstudio/vc7/zlib.rc
@@ -2,8 +2,8 @@
#define IDR_VERSION1 1
IDR_VERSION1 VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
- FILEVERSION 1,2,3,5
- PRODUCTVERSION 1,2,3,5
+ FILEVERSION 1,2,3,6
+ PRODUCTVERSION 1,2,3,6
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
FILEFLAGS 0
FILEOS VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@
BEGIN
VALUE "FileDescription", "zlib data compression library\0"
- VALUE "FileVersion", "1.2.3.5\0"
+ VALUE "FileVersion", "1.2.3.6\0"
VALUE "InternalName", "zlib\0"
VALUE "OriginalFilename", "zlib.dll\0"
VALUE "ProductName", "ZLib.DLL\0"
VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
- VALUE "LegalCopyright", "(C) 1995-2006 Jean-loup Gailly & Mark Adler\0"
+ VALUE "LegalCopyright", "(C) 1995-2010 Jean-loup Gailly & Mark Adler\0"
END
END
BLOCK "VarFileInfo"
diff --git a/deflate.c b/deflate.c
index d34e1ad..c010a89 100644
--- a/deflate.c
+++ b/deflate.c
@@ -52,7 +52,7 @@
#include "deflate.h"
const char deflate_copyright[] =
- " deflate 1.2.3.5 Copyright 1995-2010 Jean-loup Gailly and Mark Adler ";
+ " deflate 1.2.3.6 Copyright 1995-2010 Jean-loup Gailly and Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
diff --git a/examples/README.examples b/examples/README.examples
index 146919c..56a3171 100644
--- a/examples/README.examples
+++ b/examples/README.examples
@@ -34,12 +34,6 @@
and deflateSetDictionary()
- illustrates use of a gzip header extra field
-pigz.c
- parallel implementation of gzip compression
- - uses pthreads to speed up compression on multiple core machines
- - illustrates the use of deflateSetDictionary() with raw deflate
- - illustrates the use of crc32_combine()
-
zlib_how.html
painfully comprehensive description of zpipe.c (see below)
- describes in excruciating detail the use of deflate() and inflate()
diff --git a/examples/gun.c b/examples/gun.c
index bfec590..72b0882 100644
--- a/examples/gun.c
+++ b/examples/gun.c
@@ -1,7 +1,7 @@
/* gun.c -- simple gunzip to give an example of the use of inflateBack()
- * Copyright (C) 2003, 2005 Mark Adler
+ * Copyright (C) 2003, 2005, 2008, 2010 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
- Version 1.3 12 June 2005 Mark Adler */
+ Version 1.6 17 January 2010 Mark Adler */
/* Version history:
1.0 16 Feb 2003 First version for testing of inflateBack()
@@ -15,6 +15,9 @@
1.2 20 Mar 2005 Add Unix compress (LZW) decompression
Copy file attributes from input file to output file
1.3 12 Jun 2005 Add casts for error messages [Oberhumer]
+ 1.4 8 Dec 2006 LZW decompression speed improvements
+ 1.5 9 Feb 2008 Avoid warning in latest version of gcc
+ 1.6 17 Jan 2010 Avoid signed/unsigned comparison warnings
*/
/*
@@ -197,14 +200,14 @@
int outfile, z_stream *strm)
{
int last; /* last byte read by NEXT(), or -1 if EOF */
- int chunk; /* bytes left in current chunk */
+ unsigned chunk; /* bytes left in current chunk */
int left; /* bits left in rem */
unsigned rem; /* unused bits from input */
int bits; /* current bits per code */
unsigned code; /* code, table traversal index */
unsigned mask; /* mask for current bits codes */
int max; /* maximum bits per code for this stream */
- int flags; /* compress flags, then block compress flag */
+ unsigned flags; /* compress flags, then block compress flag */
unsigned end; /* last valid entry in prefix/suffix tables */
unsigned temp; /* current code */
unsigned prev; /* previous code */
@@ -212,6 +215,7 @@
unsigned stack; /* next position for reversed string */
unsigned outcnt; /* bytes in output buffer */
struct outd outd; /* output structure */
+ unsigned char *p;
/* set up output */
outd.outfile = outfile;
@@ -322,10 +326,12 @@
}
/* walk through linked list to generate output in reverse order */
+ p = match + stack;
while (code >= 256) {
- match[stack++] = suffix[code];
+ *p++ = suffix[code];
code = prefix[code];
}
+ stack = p - match;
match[stack++] = (unsigned char)code;
final = code;
@@ -349,9 +355,11 @@
}
outcnt = 0;
}
+ p = match + stack;
do {
- outbuf[outcnt++] = match[--stack];
- } while (stack);
+ outbuf[outcnt++] = *--p;
+ } while (p > match);
+ stack = 0;
/* loop for next code with final and prev as the last match, rem and
left provide the first 0..7 bits of the next code, end is the last
@@ -375,7 +383,7 @@
{
int ret, first, last;
unsigned have, flags, len;
- unsigned char *next;
+ unsigned char *next = NULL;
struct ind ind, *indp;
struct outd outd;
@@ -471,10 +479,10 @@
/* check trailer */
ret = Z_BUF_ERROR;
- if (NEXT() != (outd.crc & 0xff) ||
- NEXT() != ((outd.crc >> 8) & 0xff) ||
- NEXT() != ((outd.crc >> 16) & 0xff) ||
- NEXT() != ((outd.crc >> 24) & 0xff)) {
+ if (NEXT() != (int)(outd.crc & 0xff) ||
+ NEXT() != (int)((outd.crc >> 8) & 0xff) ||
+ NEXT() != (int)((outd.crc >> 16) & 0xff) ||
+ NEXT() != (int)((outd.crc >> 24) & 0xff)) {
/* crc error */
if (last != -1) {
strm->msg = (char *)"incorrect data check";
@@ -482,10 +490,10 @@
}
break;
}
- if (NEXT() != (outd.total & 0xff) ||
- NEXT() != ((outd.total >> 8) & 0xff) ||
- NEXT() != ((outd.total >> 16) & 0xff) ||
- NEXT() != ((outd.total >> 24) & 0xff)) {
+ if (NEXT() != (int)(outd.total & 0xff) ||
+ NEXT() != (int)((outd.total >> 8) & 0xff) ||
+ NEXT() != (int)((outd.total >> 16) & 0xff) ||
+ NEXT() != (int)((outd.total >> 24) & 0xff)) {
/* length error */
if (last != -1) {
strm->msg = (char *)"incorrect length check";
@@ -642,8 +650,8 @@
argv++;
test = 0;
if (argc && strcmp(*argv, "-h") == 0) {
- fprintf(stderr, "gun 1.3 (12 Jun 2005)\n");
- fprintf(stderr, "Copyright (c) 2005 Mark Adler\n");
+ fprintf(stderr, "gun 1.6 (17 Jan 2010)\n");
+ fprintf(stderr, "Copyright (C) 2003-2010 Mark Adler\n");
fprintf(stderr, "usage: gun [-t] [file1.gz [file2.Z ...]]\n");
return 0;
}
diff --git a/examples/pigz.c b/examples/pigz.c
deleted file mode 100644
index 42794d0..0000000
--- a/examples/pigz.c
+++ /dev/null
@@ -1,452 +0,0 @@
-/* pigz.c -- parallel implementation of gzip
- * Copyright (C) 2007 Mark Adler
- * Version 1.1 28 January 2007 Mark Adler
- */
-
-/* Version history:
- 1.0 17 Jan 2007 First version
- 1.1 28 Jan 2007 Avoid void * arithmetic (some compilers don't get that)
- Add note about requiring zlib 1.2.3
- Allow compression level 0 (no compression)
- Completely rewrite parallelism -- add a write thread
- Use deflateSetDictionary() to make use of history
- Tune argument defaults to best performance on four cores
- */
-
-/*
- pigz compresses from stdin to stdout using threads to make use of multiple
- processors and cores. The input is broken up into 128 KB chunks, and each
- is compressed separately. The CRC for each chunk is also calculated
- separately. The compressed chunks are written in order to the output,
- and the overall CRC is calculated from the CRC's of the chunks.
-
- The compressed data format generated is the gzip format using the deflate
- compression method. First a gzip header is written, followed by raw deflate
- partial streams. They are partial, in that they do not have a terminating
- block. At the end, the deflate stream is terminated with a final empty
- static block, and lastly a gzip trailer is written with the CRC and the
- number of input bytes.
-
- Each raw deflate partial stream is terminated by an empty stored block
- (using the Z_SYNC_FLUSH option of zlib), in order to end that partial
- bit stream at a byte boundary. That allows the partial streams to be
- concantenated simply as sequences of bytes. This adds a very small four
- or five byte overhead to the output for each input chunk.
-
- zlib's crc32_combine() routine allows the calcuation of the CRC of the
- entire input using the independent CRC's of the chunks. pigz requires zlib
- version 1.2.3 or later, since that is the first version that provides the
- crc32_combine() function.
-
- pigz uses the POSIX pthread library for thread control and communication.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <unistd.h>
-#include "zlib.h"
-
-#define local static
-
-/* exit with error */
-local void bail(char *msg)
-{
- fprintf(stderr, "pigz abort: %s\n", msg);
- exit(1);
-}
-
-/* read up to len bytes into buf, repeating read() calls as needed */
-local size_t readn(int desc, unsigned char *buf, size_t len)
-{
- ssize_t ret;
- size_t got;
-
- got = 0;
- while (len) {
- ret = read(desc, buf, len);
- if (ret < 0)
- bail("read error");
- if (ret == 0)
- break;
- buf += ret;
- len -= ret;
- got += ret;
- }
- return got;
-}
-
-/* write len bytes, repeating write() calls as needed */
-local void writen(int desc, unsigned char *buf, size_t len)
-{
- ssize_t ret;
-
- while (len) {
- ret = write(desc, buf, len);
- if (ret < 1)
- bail("write error");
- buf += ret;
- len -= ret;
- }
-}
-
-/* a flag variable for communication between two threads */
-struct flag {
- int value; /* value of flag */
- pthread_mutex_t lock; /* lock for checking and changing flag */
- pthread_cond_t cond; /* condition for signaling on flag change */
-};
-
-/* initialize a flag for use, starting with value val */
-local void flag_init(struct flag *me, int val)
-{
- me->value = val;
- pthread_mutex_init(&(me->lock), NULL);
- pthread_cond_init(&(me->cond), NULL);
-}
-
-/* set the flag to val, signal another process that may be waiting for it */
-local void flag_set(struct flag *me, int val)
-{
- pthread_mutex_lock(&(me->lock));
- me->value = val;
- pthread_cond_signal(&(me->cond));
- pthread_mutex_unlock(&(me->lock));
-}
-
-/* if it isn't already, wait for some other thread to set the flag to val */
-local void flag_wait(struct flag *me, int val)
-{
- pthread_mutex_lock(&(me->lock));
- while (me->value != val)
- pthread_cond_wait(&(me->cond), &(me->lock));
- pthread_mutex_unlock(&(me->lock));
-}
-
-/* if flag is equal to val, wait for some other thread to change it */
-local void flag_wait_not(struct flag *me, int val)
-{
- pthread_mutex_lock(&(me->lock));
- while (me->value == val)
- pthread_cond_wait(&(me->cond), &(me->lock));
- pthread_mutex_unlock(&(me->lock));
-}
-
-/* clean up the flag when done with it */
-local void flag_done(struct flag *me)
-{
- pthread_cond_destroy(&(me->cond));
- pthread_mutex_destroy(&(me->lock));
-}
-
-/* a unit of work to feed to compress_thread() -- it is assumed that the out
- buffer is large enough to hold the maximum size len bytes could deflate to,
- plus five bytes for the final sync marker */
-struct work {
- size_t len; /* length of input */
- unsigned long crc; /* crc of input */
- unsigned char *buf; /* input */
- unsigned char *out; /* space for output (guaranteed big enough) */
- z_stream strm; /* pre-initialized z_stream */
- struct flag busy; /* busy flag indicating work unit in use */
- pthread_t comp; /* this compression thread */
-};
-
-/* busy flag values */
-#define IDLE 0 /* compress and writing done -- can start compress */
-#define COMP 1 /* compress -- input and output buffers in use */
-#define WRITE 2 /* compress done, writing output -- can read input */
-
-/* read-only globals (set by main/read thread before others started) */
-local int ind; /* input file descriptor */
-local int outd; /* output file descriptor */
-local int level; /* compression level */
-local int procs; /* number of compression threads (>= 2) */
-local size_t size; /* uncompressed input size per thread (>= 32K) */
-local struct work *jobs; /* work units: jobs[0..procs-1] */
-
-/* next and previous jobs[] indices */
-#define NEXT(n) ((n) == procs - 1 ? 0 : (n) + 1)
-#define PREV(n) ((n) == 0 ? procs - 1 : (n) - 1)
-
-/* sliding dictionary size for deflate */
-#define DICT 32768U
-
-/* largest power of 2 that fits in an unsigned int -- used to limit requests
- to zlib functions that use unsigned int lengths */
-#define MAX ((((unsigned)-1) >> 1) + 1)
-
-/* compress thread: compress the input in the provided work unit and compute
- its crc -- assume that the amount of space at job->out is guaranteed to be
- enough for the compressed output, as determined by the maximum expansion
- of deflate compression -- use the input in the previous work unit (if there
- is one) to set the deflate dictionary for better compression */
-local void *compress_thread(void *arg)
-{
- size_t len; /* input length for this work unit */
- unsigned long crc; /* crc of input data */
- struct work *prev; /* previous work unit */
- struct work *job = arg; /* work unit for this thread */
- z_stream *strm = &(job->strm); /* zlib stream for this work unit */
-
- /* reset state for a new compressed stream */
- (void)deflateReset(strm);
-
- /* initialize input, output, and crc */
- strm->next_in = job->buf;
- strm->next_out = job->out;
- len = job->len;
- crc = crc32(0L, Z_NULL, 0);
-
- /* set dictionary if this isn't the first work unit, and if we will be
- compressing something (the read thread assures that the dictionary
- data in the previous work unit is still there) */
- prev = jobs + PREV(job - jobs);
- if (prev->buf != NULL && len != 0)
- deflateSetDictionary(strm, prev->buf + (size - DICT), DICT);
-
- /* run MAX-sized amounts of input through deflate and crc32 -- this loop
- is needed for those cases where the integer type is smaller than the
- size_t type, or when len is close to the limit of the size_t type */
- while (len > MAX) {
- strm->avail_in = MAX;
- strm->avail_out = (unsigned)-1;
- crc = crc32(crc, strm->next_in, strm->avail_in);
- (void)deflate(strm, Z_NO_FLUSH);
- len -= MAX;
- }
-
- /* run last piece through deflate and crc32, follow with a sync marker */
- if (len) {
- strm->avail_in = len;
- strm->avail_out = (unsigned)-1;
- crc = crc32(crc, strm->next_in, strm->avail_in);
- (void)deflate(strm, Z_SYNC_FLUSH);
- }
-
- /* don't need to Z_FINISH, since we'd delete the last two bytes anyway */
-
- /* return result */
- job->crc = crc;
- return NULL;
-}
-
-/* put a 4-byte integer into a byte array in LSB order */
-#define PUT4(a,b) (*(a)=(b),(a)[1]=(b)>>8,(a)[2]=(b)>>16,(a)[3]=(b)>>24)
-
-/* write thread: wait for compression threads to complete, write output in
- order, also write gzip header and trailer around the compressed data */
-local void *write_thread(void *arg)
-{
- int n; /* compress thread index */
- size_t len; /* length of input processed */
- unsigned long tot; /* total uncompressed size (overflow ok) */
- unsigned long crc; /* CRC-32 of uncompressed data */
- unsigned char wrap[10]; /* gzip header or trailer */
-
- /* write simple gzip header */
- memcpy(wrap, "\037\213\10\0\0\0\0\0\0\3", 10);
- wrap[8] = level == 9 ? 2 : (level == 1 ? 4 : 0);
- writen(outd, wrap, 10);
-
- /* process output of compress threads until end of input */
- tot = 0;
- crc = crc32(0L, Z_NULL, 0);
- n = 0;
- do {
- /* wait for compress thread to start, then wait to complete */
- flag_wait(&(jobs[n].busy), COMP);
- pthread_join(jobs[n].comp, NULL);
-
- /* now that compress is done, allow read thread to use input buffer */
- flag_set(&(jobs[n].busy), WRITE);
-
- /* write compressed data and update length and crc */
- writen(outd, jobs[n].out, jobs[n].strm.next_out - jobs[n].out);
- len = jobs[n].len;
- tot += len;
- crc = crc32_combine(crc, jobs[n].crc, len);
-
- /* release this work unit and go to the next work unit */
- flag_set(&(jobs[n].busy), IDLE);
- n = NEXT(n);
-
- /* an input buffer less than size in length indicates end of input */
- } while (len == size);
-
- /* write final static block and gzip trailer (crc and len mod 2^32) */
- wrap[0] = 3; wrap[1] = 0;
- PUT4(wrap + 2, crc);
- PUT4(wrap + 6, tot);
- writen(outd, wrap, 10);
- return NULL;
-}
-
-/* one-time initialization of a work unit -- this is where we set the deflate
- compression level and request raw deflate, and also where we set the size
- of the output buffer to guarantee enough space for a worst-case deflate
- ending with a Z_SYNC_FLUSH */
-local void job_init(struct work *job)
-{
- int ret; /* deflateInit2() return value */
-
- job->buf = malloc(size);
- job->out = malloc(size + (size >> 11) + 10);
- job->strm.zfree = Z_NULL;
- job->strm.zalloc = Z_NULL;
- job->strm.opaque = Z_NULL;
- ret = deflateInit2(&(job->strm), level, Z_DEFLATED, -15, 8,
- Z_DEFAULT_STRATEGY);
- if (job->buf == NULL || job->out == NULL || ret != Z_OK)
- bail("not enough memory");
-}
-
-/* compress ind to outd in the gzip format, using multiple threads for the
- compression and crc calculation and another thread for writing the output --
- the read thread is the main thread */
-local void read_thread(void)
-{
- int n; /* general index */
- size_t got; /* amount read */
- pthread_attr_t attr; /* thread attributes (left at defaults) */
- pthread_t write; /* write thread */
-
- /* set defaults (not all pthread implementations default to joinable) */
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
-
- /* allocate and set up work list (individual work units will be initialized
- as needed, in case the input is short), assure that allocation size
- arithmetic does not overflow */
- if (size + (size >> 11) + 10 < (size >> 11) + 10 ||
- (ssize_t)(size + (size >> 11) + 10) < 0 ||
- ((size_t)0 - 1) / procs <= sizeof(struct work) ||
- (jobs = malloc(procs * sizeof(struct work))) == NULL)
- bail("not enough memory");
- for (n = 0; n < procs; n++) {
- jobs[n].buf = NULL;
- flag_init(&(jobs[n].busy), IDLE);
- }
-
- /* start write thread */
- pthread_create(&write, &attr, write_thread, NULL);
-
- /* read from input and start compress threads (write thread will pick up
- the output of the compress threads) */
- n = 0;
- do {
- /* initialize this work unit if it's the first time it's used */
- if (jobs[n].buf == NULL)
- job_init(jobs + n);
-
- /* read input data, but wait for last compress on this work unit to be
- done, and wait for the dictionary to be used by the last compress on
- the next work unit */
- flag_wait_not(&(jobs[n].busy), COMP);
- flag_wait_not(&(jobs[NEXT(n)].busy), COMP);
- got = readn(ind, jobs[n].buf, size);
-
- /* start compress thread, but wait for write to be done first */
- flag_wait(&(jobs[n].busy), IDLE);
- jobs[n].len = got;
- pthread_create(&(jobs[n].comp), &attr, compress_thread, jobs + n);
-
- /* mark work unit so write thread knows compress was started */
- flag_set(&(jobs[n].busy), COMP);
-
- /* go to the next work unit */
- n = NEXT(n);
-
- /* do until end of input, indicated by a read less than size */
- } while (got == size);
-
- /* wait for the write thread to complete -- the write thread will join with
- all of the compress threads, so this waits for all of the threads to
- complete */
- pthread_join(write, NULL);
-
- /* free up all requested resources and return */
- for (n = procs - 1; n >= 0; n--) {
- flag_done(&(jobs[n].busy));
- (void)deflateEnd(&(jobs[n].strm));
- free(jobs[n].out);
- free(jobs[n].buf);
- }
- free(jobs);
- pthread_attr_destroy(&attr);
-}
-
-/* Process arguments for level, size, and procs, compress from stdin to
- stdout in the gzip format. Note that procs must be at least two in
- order to provide a dictionary in one work unit for the other work
- unit, and that size must be at least 32K to store a full dictionary. */
-int main(int argc, char **argv)
-{
- int n; /* general index */
- int get; /* command line parameters to get */
- char *arg; /* command line argument */
-
- /* set defaults -- 32 processes and 128K buffers was found to provide
- good utilization of four cores (about 97%) and balanced the overall
- execution time impact of more threads against more dictionary
- processing for a fixed amount of memory -- the memory usage for these
- settings and full use of all work units (at least 4 MB of input) is
- 16.2 MB
- */
- level = Z_DEFAULT_COMPRESSION;
- procs = 32;
- size = 131072UL;
-
- /* process command-line arguments */
- get = 0;
- for (n = 1; n < argc; n++) {
- arg = argv[n];
- if (*arg == '-') {
- while (*++arg)
- if (*arg >= '0' && *arg <= '9') /* compression level */
- level = *arg - '0';
- else if (*arg == 'b') /* chunk size in K */
- get |= 1;
- else if (*arg == 'p') /* number of processes */
- get |= 2;
- else if (*arg == 'h') { /* help */
- fputs("usage: pigz [-0..9] [-b blocksizeinK]", stderr);
- fputs(" [-p processes] < foo > foo.gz\n", stderr);
- return 0;
- }
- else
- bail("invalid option");
- }
- else if (get & 1) {
- if (get & 2)
- bail("you need to separate the -b and -p options");
- size = (size_t)(atol(arg)) << 10; /* chunk size */
- if (size < DICT)
- bail("invalid option");
- get = 0;
- }
- else if (get & 2) {
- procs = atoi(arg); /* processes */
- if (procs < 2)
- bail("invalid option");
- get = 0;
- }
- else
- bail("invalid option (you need to pipe input and output)");
- }
- if (get)
- bail("missing option argument");
-
- /* do parallel compression from stdin to stdout (the read thread starts up
- the write thread and the compression threads, and they all join before
- the read thread returns) */
- ind = 0;
- outd = 1;
- read_thread();
-
- /* done */
- return 0;
-}
diff --git a/gzguts.h b/gzguts.h
index 429c21b..8b7914d 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -15,10 +15,12 @@
#define ZLIB_INTERNAL
#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
#include "zlib.h"
+#ifdef STDC
+# include <string.h>
+# include <stdlib.h>
+#endif
+#include <fcntl.h>
#ifdef NO_DEFLATE /* for compatibility with old definition */
# define NO_GZCOMPRESS
@@ -42,7 +44,8 @@
/* get errno and strerror definition */
#if defined UNDER_CE && defined NO_ERRNO_H
-# define zstrerror(errnum) strwinerror((DWORD)errnum)
+# include <windows.h>
+# define zstrerror() gz_strwinerror((DWORD)GetLastError())
#else
# ifdef STDC
# include <errno.h>
@@ -54,7 +57,7 @@
/* MVS fdopen() */
#ifdef __MVS__
-# pragma map (fdopen , "\174\174FDOPEN")
+ #pragma map (fdopen , "\174\174FDOPEN")
FILE *fdopen(int, const char *);
#endif
@@ -106,4 +109,7 @@
typedef gz_state FAR *gz_statep;
/* shared functions */
-ZEXTERN void ZEXPORT gz_error OF((gz_statep, int, char *));
+ZEXTERN void ZEXPORT gz_error OF((gz_statep, int, const char *));
+#if defined UNDER_CE && defined NO_ERRNO_H
+ZEXTERN char ZEXPORT *gz_strwinerror OF((DWORD error));
+#endif
diff --git a/gzio.c b/gzio.c
index f9afc10..72b6287 100644
--- a/gzio.c
+++ b/gzio.c
@@ -95,7 +95,7 @@
#endif /* UNDER_CE && NO_ERRNO_H */
#ifdef __MVS__
-# pragma map (fdopen , "\174\174FDOPEN")
+ #pragma map (fdopen , "\174\174FDOPEN")
FILE *fdopen(int, const char *);
#endif
diff --git a/gzlib.c b/gzlib.c
index bcef6c2..c9a82dc 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -18,21 +18,17 @@
local gzFile gz_open OF((const char *, int, const char *, int));
#if defined UNDER_CE && defined NO_ERRNO_H
-local char *strwinerror OF((DWORD error));
-# include <windows.h>
+/* Map the Windows error number in ERROR to a locale-dependent error message
+ string and return a pointer to it. Typically, the values for ERROR come
+ from GetLastError.
-/* Map the Windows error number in ERROR to a locale-dependent error
- message string and return a pointer to it. Typically, the values
- for ERROR come from GetLastError.
+ The string pointed to shall not be modified by the application, but may be
+ overwritten by a subsequent call to gz_strwinerror
- The string pointed to shall not be modified by the application,
- but may be overwritten by a subsequent call to strwinerror
-
- The strwinerror function does not change the current setting
- of GetLastError. */
-
-local char *strwinerror (error)
+ The gz_strwinerror function does not change the current setting of
+ GetLastError. */
+char ZEXPORT *gz_strwinerror (error)
DWORD error;
{
static char buf[1024];
@@ -82,18 +78,18 @@
state->have = 0; /* no output data available */
state->eof = 0; /* not at end of file */
}
- state->seek = 0; /* no seek request pending */
- gz_error(state, Z_OK, NULL); /* clear error */
- state->pos = 0; /* no uncompressed data yet */
- state->strm.avail_in = 0; /* no input data yet */
+ state->seek = 0; /* no seek request pending */
+ gz_error(state, Z_OK, NULL); /* clear error */
+ state->pos = 0; /* no uncompressed data yet */
+ state->strm.avail_in = 0; /* no input data yet */
}
/* Open a gzip file either by name or file descriptor. */
-local gzFile gz_open(path, fd, mode, use64)
+local gzFile gz_open(path, fd, mode, large)
const char *path;
int fd;
const char *mode;
- int use64;
+ int large;
{
gz_statep state;
@@ -156,9 +152,13 @@
/* open the file with the appropriate mode (or just use fd) */
state->fd = fd != -1 ? fd :
open(path,
+ (large ?
#ifdef O_LARGEFILE
- (use64 ? O_LARGEFILE : 0) |
+ O_LARGEFILE
+#else
+ 0
#endif
+ : 0) |
#ifdef O_BINARY
O_BINARY |
#endif
@@ -214,13 +214,16 @@
int fd;
const char *mode;
{
- char path[46]; /* allow up to 128-bit integers, so don't worry --
- the sprintf() is safe */
+ char path[46]; /* identifier for error messages */
if (fd < 0)
return NULL;
- sprintf(path, "<fd:%d>", fd); /* for error messages */
- return gz_open(path, fd, mode, 1);
+#ifdef NO_snprintf
+ sprintf(path, "<fd:%d>", fd); /* big enough for 128-bit integers */
+#else
+ snprintf(path, sizeof(path), "<fd:%d>", fd);
+#endif
+ return gz_open(path, fd, mode, 0);
}
/* -- see zlib.h -- */
@@ -325,7 +328,7 @@
return -1;
}
- /* if reading, skip what's in output buffer (one less gz_getc() check) */
+ /* if reading, skip what's in output buffer (one less gzgetc() check) */
if (state->mode == GZ_READ) {
n = state->have > offset ? (unsigned)offset : state->have;
state->have -= n;
@@ -422,10 +425,10 @@
/* get internal structure and check integrity */
if (file == NULL)
- return -1;
+ return 0;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
- return -1;
+ return 0;
/* return end-of-file state */
return state->mode == GZ_READ ? (state->eof && state->have == 0) : 0;
@@ -470,15 +473,15 @@
}
/* Create an error message in allocated memory and set state->err and
- state->msg accordingly. Free any previous error message already there. Do
+ state->msg accordingly. Free any previous error message already there. Do
not try to free or allocate space if the error is Z_MEM_ERROR (out of
- memory). Simply save the error message as a static string. If there is
- an allocation failure constructing the error message, then convert the
- error to out of memory. */
+ memory). Simply save the error message as a static string. If there is an
+ allocation failure constructing the error message, then convert the error to
+ out of memory. */
void ZEXPORT gz_error(state, err, msg)
gz_statep state;
int err;
- char *msg;
+ const char *msg;
{
/* free previously allocated message and clear */
if (state->msg != NULL) {
@@ -494,14 +497,14 @@
/* for an out of memory error, save as static string */
if (err == Z_MEM_ERROR) {
- state->msg = msg;
+ state->msg = (char *)msg;
return;
}
/* construct error message with path */
if ((state->msg = malloc(strlen(state->path) + strlen(msg) + 3)) == NULL) {
state->err = Z_MEM_ERROR;
- state->msg = "out of memory";
+ state->msg = (char *)"out of memory";
return;
}
strcpy(state->msg, state->path);
diff --git a/gzread.c b/gzread.c
index 836c57c..74bdc7b 100644
--- a/gzread.c
+++ b/gzread.c
@@ -69,8 +69,8 @@
(strm->avail_in == 0 ? -1 : \
(strm->avail_in--, *(strm->next_in)++)))
-/* Get a four-byte little-endian integer and return 0 on success and the
- value in *ret. Otherwise -1 is returned and *ret is not modified. */
+/* Get a four-byte little-endian integer and return 0 on success and the value
+ in *ret. Otherwise -1 is returned and *ret is not modified. */
local int gz_next4(state, ret)
gz_statep state;
unsigned long *ret;
@@ -93,7 +93,7 @@
/* Look for gzip header, set up for inflate or copy. state->have must be zero.
If this is the first time in, allocate required memory. state->how will be
left unchanged if there is no more input data available, will be set to 1 if
- there is no gzip header and direct copying will be performned, or it will be
+ there is no gzip header and direct copying will be performed, or it will be
set to 2 for decompression, and the gzip header will be skipped so that the
next available input data is the raw deflate stream. If direct copying,
then leftover input data from the input buffer will be copied to the output
@@ -190,6 +190,8 @@
NEXT();
NEXT();
}
+ /* an unexpected end of file is not checked for here -- it will be
+ noticed on the first request for uncompressed data */
/* set up for decompression */
inflateReset(strm);
@@ -206,7 +208,7 @@
/* doing raw i/o, save start of raw data for seeking, copy any leftover
input to output -- this assumes that the output buffer is larger than
- the input buffer */
+ the input buffer, which also assures space for gzungetc() */
state->raw = state->pos;
state->next = state->out;
if (strm->avail_in) {
@@ -220,10 +222,10 @@
/* Decompress from input to the provided next_out and avail_out in the state.
If the end of the compressed data is reached, then verify the gzip trailer
- check value and length (modulo 2^32). state->have and state->next are
- set to point to the just decompressed data, and the crc is updated. If the
+ check value and length (modulo 2^32). state->have and state->next are set
+ to point to the just decompressed data, and the crc is updated. If the
trailer is verified, state->how is reset to zero to look for the next gzip
- stream or raw data, once state->have is depleted. Returns 0 on success, -1
+ stream or raw data, once state->have is depleted. Returns 0 on success, -1
on failure. Failures may include invalid compressed data or a failed gzip
trailer verification. */
local int gz_decomp(state)
@@ -372,6 +374,17 @@
if (state->mode != GZ_READ || state->err != Z_OK)
return -1;
+ /* since an int is returned, make sure len fits in one, otherwise return
+ with an error (this avoids the flaw in the interface) */
+ if ((int)len < 0) {
+ gz_error(state, Z_BUF_ERROR, "requested length does not fit in int");
+ return -1;
+ }
+
+ /* if len is zero, avoid unnecessary operations */
+ if (len == 0)
+ return 0;
+
/* process a skip request */
if (state->seek) {
state->seek = 0;
@@ -381,8 +394,7 @@
/* get len bytes to buf, or less than len if at the end */
got = 0;
- while (len) {
-
+ do {
/* first just try copying data from the output buffer */
if (state->have) {
n = state->have > len ? len : state->have;
@@ -402,6 +414,8 @@
if (gz_make(state) == -1)
return -1;
continue; /* no progress yet -- go back to memcpy() above */
+ /* the copy above assures that we will leave with space in the
+ output buffer, allowing at least one gzungetc() to succeed */
}
/* large len -- read directly into user buffer */
@@ -422,13 +436,13 @@
/* update progress */
len -= n;
- buf += n;
+ buf = (char *)buf + n;
got += n;
state->pos += n;
- }
+ } while (len);
- /* return number of bytes read into user buffer */
- return (int)got; /* len had better fit in int -- interface flaw */
+ /* return number of bytes read into user buffer (will fit in int) */
+ return (int)got;
}
/* -- see zlib.h -- */
@@ -448,7 +462,7 @@
if (state->mode != GZ_READ || state->err != Z_OK)
return -1;
- /* try output buffer */
+ /* try output buffer (no need to check for skip request) */
if (state->have) {
state->have--;
state->pos++;
@@ -496,9 +510,11 @@
return c;
}
- /* if no room, give up (must have already done a gz_ungetc()) */
- if (state->have == (state->size << 1))
+ /* if no room, give up (must have already done a gzungetc()) */
+ if (state->have == (state->size << 1)) {
+ gz_error(state, Z_BUF_ERROR, "out of room to push characters");
return -1;
+ }
/* slide output data if needed and insert byte before existing data */
if (state->next == state->out) {
diff --git a/gzwrite.c b/gzwrite.c
index 65a13c3..c7c033a 100644
--- a/gzwrite.c
+++ b/gzwrite.c
@@ -20,15 +20,6 @@
int ret;
z_streamp strm = &(state->strm);
- /* check version of zlib -- need 1.2.1 or later for gzip deflate() */
-#ifdef ZLIB_VERNUM
- if (ZLIB_VERNUM < 0x1210)
-#endif
- {
- gz_error(state, Z_VERSION_ERROR, "need zlib 1.2.1 or later");
- return -1;
- }
-
/* allocate input and output buffers */
state->in = malloc(state->want);
state->out = malloc(state->want);
@@ -169,6 +160,17 @@
if (state->mode != GZ_WRITE || state->err != Z_OK)
return -1;
+ /* since an int is returned, make sure len fits in one, otherwise return
+ with an error (this avoids the flaw in the interface) */
+ if ((int)len < 0) {
+ gz_error(state, Z_BUF_ERROR, "requested length does not fit in int");
+ return -1;
+ }
+
+ /* if len is zero, avoid unnecessary operations */
+ if (len == 0)
+ return 0;
+
/* allocate memory if this is the first time through */
if (state->size == 0 && gz_init(state) == -1)
return -1;
@@ -183,7 +185,7 @@
/* for small len, copy to input buffer, otherwise compress directly */
if (len < state->size) {
/* copy to input buffer, compress when full */
- while (len) {
+ do {
if (strm->avail_in == 0)
strm->next_in = state->in;
n = state->size - strm->avail_in;
@@ -192,11 +194,11 @@
memcpy(strm->next_in + strm->avail_in, buf, n);
strm->avail_in += n;
state->pos += n;
- buf += n;
+ buf = (char *)buf + n;
len -= n;
if (len && gz_comp(state, Z_NO_FLUSH) == -1)
return -1;
- }
+ } while (len);
}
else {
/* consume whatever's left in the input buffer */
@@ -211,7 +213,7 @@
return -1;
}
- /* input was all buffered or compressed */
+ /* input was all buffered or compressed (put will fit in int) */
return (int)put;
}
@@ -332,12 +334,10 @@
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
return 0;
- /* write out result of printf() */
+ /* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state->in;
state->pos += len;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
return len;
}
@@ -408,12 +408,10 @@
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
return 0;
- /* write out result of printf() */
+ /* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state->in;
state->pos += len;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
return len;
}
diff --git a/inflate.c b/inflate.c
index e7f3cdd..40c0ec8 100644
--- a/inflate.c
+++ b/inflate.c
@@ -154,7 +154,7 @@
/* set number of window bits, free window if different */
if (windowBits && (windowBits < 8 || windowBits > 15))
return Z_STREAM_ERROR;
- if (state->wbits != windowBits && state->window != Z_NULL) {
+ if (state->wbits != (unsigned)windowBits && state->window != Z_NULL) {
ZFREE(strm, state->window);
state->window = Z_NULL;
}
@@ -1458,8 +1458,8 @@
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
-#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
state->sane = !subvert;
+#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
return Z_OK;
#else
state->sane = 1;
diff --git a/inftrees.c b/inftrees.c
index 21f4dfb..ae89d97 100644
--- a/inftrees.c
+++ b/inftrees.c
@@ -9,7 +9,7 @@
#define MAXBITS 15
const char inflate_copyright[] =
- " inflate 1.2.3.5 Copyright 1995-2010 Mark Adler ";
+ " inflate 1.2.3.6 Copyright 1995-2010 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 @@
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, 69, 199};
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 70};
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
diff --git a/make_vms.com b/make_vms.com
index e3e8740..fc5fd0c 100644
--- a/make_vms.com
+++ b/make_vms.com
@@ -11,15 +11,18 @@
$! Version history
$! 0.01 20060120 First version to receive a number
$! 0.02 20061008 Adapt to new Makefile.in
+$! 0.03 20091224 Add support for large file check
+$! 0.04 20100110 Add new gzclose, gzlib, gzread, gzwrite
$!
$ on error then goto err_exit
$!
-$!
-$! Just some general constants...
-$!
$ true = 1
$ false = 0
$ tmpnam = "temp_" + f$getjpi("","pid")
+$ tt = tmpnam + ".txt"
+$ tc = tmpnam + ".c"
+$ th = tmpnam + ".h"
+$ define/nolog tconfig 'th'
$ its_decc = false
$ its_vaxc = false
$ its_gnuc = false
@@ -27,17 +30,25 @@
$!
$! Setup variables holding "config" information
$!
-$ Make = ""
+$ Make = ""
$ name = "Zlib"
$ version = "?.?.?"
$ v_string = "ZLIB_VERSION"
$ v_file = "zlib.h"
-$ ccopt = ""
-$ lopts = ""
+$ ccopt = ""
+$ lopts = ""
$ dnsrl = ""
+$ aconf_in_file = "config.hin"
+$ conf_check_string = ""
$ linkonly = false
$ optfile = name + ".opt"
-$ axp = f$getsyi("HW_MODEL").ge.1024
+$ libdefs = ""
+$ axp = f$getsyi("HW_MODEL").ge.1024 .and. f$getsyi("HW_MODEL").lt.4096
+$!
+$ whoami = f$parse(f$enviornment("Procedure"),,,,"NO_CONCEAL")
+$ mydef = F$parse(whoami,,,"DEVICE")
+$ mydir = f$parse(whoami,,,"DIRECTORY") - "]["
+$ myproc = f$parse(whoami,,,"Name") + f$parse(whoami,,,"type")
$!
$! Check for MMK/MMS
$!
@@ -47,11 +58,16 @@
$!
$ gosub find_version
$!
+$ open/write topt tmp.opt
+$ open/write optf 'optfile'
+$!
$ gosub check_opts
$!
$! Look for the compiler used
$!
$ gosub check_compiler
+$ close topt
+$!
$ if its_decc
$ then
$ ccopt = "/prefix=all" + ccopt
@@ -71,6 +87,49 @@
$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
$ endif
$!
+$! Build a fake configure input header
+$!
+$ open/write conf_hin config.hin
+$ write conf_hin "#undef _LARGEFILE64_SOURCE"
+$ close conf_hin
+$!
+$!
+$ i = 0
+$FIND_ACONF:
+$ fname = f$element(i,"#",aconf_in_file)
+$ if fname .eqs. "#" then goto AMISS_ERR
+$ if f$search(fname) .eqs. ""
+$ then
+$ i = i + 1
+$ goto find_aconf
+$ endif
+$ open/read/err=aconf_err aconf_in 'fname'
+$ open/write aconf zlibdefs.h
+$ACONF_LOOP:
+$ read/end_of_file=aconf_exit aconf_in line
+$ work = f$edit(line, "compress,trim")
+$ if f$extract(0,6,work) .nes. "#undef"
+$ then
+$ write aconf line
+$ else
+$ cdef = f$element(1," ",work)
+$ gosub check_config
+$ endif
+$ goto aconf_loop
+$ACONF_EXIT:
+$ write aconf "#define VMS 1"
+$ write aconf "#include <unistd.h>"
+$ write aconf "#include <unixio.h>"
+$ write aconf "#ifdef _LARGEFILE"
+$ write aconf "#define off64_t __off64_t"
+$ write aconf "#define fopen64 fopen"
+$ write aconf "#define fseeko64 fseeko"
+$ write aconf "#define lseek64 lseek"
+$ write aconf "#define ftello64 ftell"
+$ write aconf "#endif"
+$ close aconf_in
+$ close aconf
+$ delete 'th';*
$! Build the thing plain or with mms
$!
$ write sys$output "Compiling Zlib sources ..."
@@ -86,15 +145,15 @@
$ CALL MAKE deflate.OBJ "CC ''CCOPT' deflate" -
deflate.c deflate.h zutil.h zlib.h zconf.h zlibdefs.h
$ CALL MAKE gzclose.OBJ "CC ''CCOPT' gzclose" -
- gzclose.c zlib.h zconf.h zlibdefs.h gzguts.h
+ gzclose.c zutil.h zlib.h zconf.h zlibdefs.h
$ CALL MAKE gzio.OBJ "CC ''CCOPT' gzio" -
gzio.c zutil.h zlib.h zconf.h zlibdefs.h
$ CALL MAKE gzlib.OBJ "CC ''CCOPT' gzlib" -
- gzlib.c zlib.h zconf.h zlibdefs.h gzguts.h
+ gzlib.c zutil.h zlib.h zconf.h zlibdefs.h
$ CALL MAKE gzread.OBJ "CC ''CCOPT' gzread" -
- gzread.c zlib.h zconf.h zlibdefs.h gzguts.h
+ gzread.c zutil.h zlib.h zconf.h zlibdefs.h
$ CALL MAKE gzwrite.OBJ "CC ''CCOPT' gzwrite" -
- gzwrite.c zlib.h zconf.h zlibdefs.h gzguts.h
+ gzwrite.c zutil.h zlib.h zconf.h zlibdefs.h
$ CALL MAKE infback.OBJ "CC ''CCOPT' infback" -
infback.c zutil.h inftrees.h inflate.h inffast.h inffixed.h
$ CALL MAKE inffast.OBJ "CC ''CCOPT' inffast" -
@@ -153,6 +212,14 @@
$ERR_EXIT:
$ set message/facil/ident/sever/text
$ close/nolog optf
+$ close/nolog topt
+$ close/nolog conf_hin
+$ close/nolog aconf_in
+$ close/nolog aconf
+$ close/nolog out
+$ close/nolog min
+$ close/nolog mod
+$ close/nolog h_in
$ write sys$output "Exiting..."
$ exit 2
$!
@@ -200,61 +267,72 @@
$!
$! Check command line options and set symbols accordingly
$!
+$!------------------------------------------------------------------------------
+$! Version history
+$! 0.01 20041206 First version to receive a number
+$! 0.02 20060126 Add new "HELP" target
$ CHECK_OPTS:
$ i = 1
$ OPT_LOOP:
$ if i .lt. 9
$ then
$ cparm = f$edit(p'i',"upcase")
-$ if cparm .eqs. "DEBUG"
+$!
+$! Check if parameter actually contains something
+$!
+$ if f$edit(cparm,"trim") .nes. ""
$ then
-$ ccopt = ccopt + "/noopt/deb"
-$ lopts = lopts + "/deb"
-$ endif
-$ if f$locate("CCOPT=",cparm) .lt. f$length(cparm)
-$ then
-$ start = f$locate("=",cparm) + 1
-$ len = f$length(cparm) - start
-$ ccopt = ccopt + f$extract(start,len,cparm)
-$ if f$locate("AS_IS",f$edit(ccopt,"UPCASE")) .lt. f$length(ccopt) -
- then s_case = true
-$ endif
-$ if cparm .eqs. "LINK" then linkonly = true
-$ if f$locate("LOPTS=",cparm) .lt. f$length(cparm)
-$ then
-$ start = f$locate("=",cparm) + 1
-$ len = f$length(cparm) - start
-$ lopts = lopts + f$extract(start,len,cparm)
-$ endif
-$ if f$locate("CC=",cparm) .lt. f$length(cparm)
-$ then
-$ start = f$locate("=",cparm) + 1
-$ len = f$length(cparm) - start
-$ cc_com = f$extract(start,len,cparm)
- if (cc_com .nes. "DECC") .and. -
- (cc_com .nes. "VAXC") .and. -
- (cc_com .nes. "GNUC")
+$ if cparm .eqs. "DEBUG"
$ then
-$ write sys$output "Unsupported compiler choice ''cc_com' ignored"
-$ write sys$output "Use DECC, VAXC, or GNUC instead"
-$ else
-$ if cc_com .eqs. "DECC" then its_decc = true
-$ if cc_com .eqs. "VAXC" then its_vaxc = true
-$ if cc_com .eqs. "GNUC" then its_gnuc = true
+$ ccopt = ccopt + "/noopt/deb"
+$ lopts = lopts + "/deb"
$ endif
-$ endif
-$ if f$locate("MAKE=",cparm) .lt. f$length(cparm)
-$ then
-$ start = f$locate("=",cparm) + 1
-$ len = f$length(cparm) - start
-$ mmks = f$extract(start,len,cparm)
-$ if (mmks .eqs. "MMK") .or. (mmks .eqs. "MMS")
+$ if f$locate("CCOPT=",cparm) .lt. f$length(cparm)
$ then
-$ make = mmks
-$ else
-$ write sys$output "Unsupported make choice ''mmks' ignored"
-$ write sys$output "Use MMK or MMS instead"
+$ start = f$locate("=",cparm) + 1
+$ len = f$length(cparm) - start
+$ ccopt = ccopt + f$extract(start,len,cparm)
+$ if f$locate("AS_IS",f$edit(ccopt,"UPCASE")) .lt. f$length(ccopt) -
+ then s_case = true
$ endif
+$ if cparm .eqs. "LINK" then linkonly = true
+$ if f$locate("LOPTS=",cparm) .lt. f$length(cparm)
+$ then
+$ start = f$locate("=",cparm) + 1
+$ len = f$length(cparm) - start
+$ lopts = lopts + f$extract(start,len,cparm)
+$ endif
+$ if f$locate("CC=",cparm) .lt. f$length(cparm)
+$ then
+$ start = f$locate("=",cparm) + 1
+$ len = f$length(cparm) - start
+$ cc_com = f$extract(start,len,cparm)
+ if (cc_com .nes. "DECC") .and. -
+ (cc_com .nes. "VAXC") .and. -
+ (cc_com .nes. "GNUC")
+$ then
+$ write sys$output "Unsupported compiler choice ''cc_com' ignored"
+$ write sys$output "Use DECC, VAXC, or GNUC instead"
+$ else
+$ if cc_com .eqs. "DECC" then its_decc = true
+$ if cc_com .eqs. "VAXC" then its_vaxc = true
+$ if cc_com .eqs. "GNUC" then its_gnuc = true
+$ endif
+$ endif
+$ if f$locate("MAKE=",cparm) .lt. f$length(cparm)
+$ then
+$ start = f$locate("=",cparm) + 1
+$ len = f$length(cparm) - start
+$ mmks = f$extract(start,len,cparm)
+$ if (mmks .eqs. "MMK") .or. (mmks .eqs. "MMS")
+$ then
+$ make = mmks
+$ else
+$ write sys$output "Unsupported make choice ''mmks' ignored"
+$ write sys$output "Use MMK or MMS instead"
+$ endif
+$ endif
+$ if cparm .eqs. "HELP" then gosub bhelp
$ endif
$ i = i + 1
$ goto opt_loop
@@ -267,6 +345,8 @@
$! Version history
$! 0.01 20040223 First version to receive a number
$! 0.02 20040229 Save/set value of decc$no_rooted_search_lists
+$! 0.03 20060202 Extend handling of GNU C
+$! 0.04 20090402 Compaq -> hp
$CHECK_COMPILER:
$ if (.not. (its_decc .or. its_vaxc .or. its_gnuc))
$ then
@@ -282,15 +362,21 @@
$ else
$ if its_decc
$ then
-$ write sys$output "CC compiler check ... Compaq C"
+$ write sys$output "CC compiler check ... hp C"
$ if f$trnlnm("decc$no_rooted_search_lists") .nes. ""
$ then
$ dnrsl = f$trnlnm("decc$no_rooted_search_lists")
$ endif
-$ define decc$no_rooted_search_lists 1
+$ define/nolog decc$no_rooted_search_lists 1
$ else
$ if its_vaxc then write sys$output "CC compiler check ... VAX C"
-$ if its_gnuc then write sys$output "CC compiler check ... GNU C"
+$ if its_gnuc
+$ then
+$ write sys$output "CC compiler check ... GNU C"
+$ if f$trnlnm(topt) then write topt "gnu_cc:[000000]gcclib.olb/lib"
+$ if f$trnlnm(optf) then write optf "gnu_cc:[000000]gcclib.olb/lib"
+$ cc = "gcc"
+$ endif
$ if f$trnlnm(topt) then write topt "sys$share:vaxcrtl.exe/share"
$ if f$trnlnm(optf) then write optf "sys$share:vaxcrtl.exe/share"
$ endif
@@ -310,7 +396,8 @@
# written by Martin P.J. Zinser
# <zinser@zinser.no-ip.info or zinser@sysdev.deutsche-boerse.com>
-OBJS = adler32.obj, compress.obj, crc32.obj, gzio.obj, uncompr.obj, infback.obj\
+OBJS = adler32.obj, compress.obj, crc32.obj, gzclose.obj, gzio.obj, gzlib.obj\
+ gzread.obj, gzwrite.obj, uncompr.obj, infback.obj\
deflate.obj, trees.obj, zutil.obj, inflate.obj, \
inftrees.obj, inffast.obj
@@ -342,7 +429,11 @@
crc32.obj : crc32.c zutil.h zlib.h zconf.h zlibdefs.h
deflate.obj : deflate.c deflate.h zutil.h zlib.h zconf.h zlibdefs.h
example.obj : example.c zlib.h zconf.h zlibdefs.h
+gzclose.obj : gzclose.c zutil.h zlib.h zconf.h zlibdefs.h
gzio.obj : gzio.c zutil.h zlib.h zconf.h zlibdefs.h
+gzlib.obj : gzlib.c zutil.h zlib.h zconf.h zlibdefs.h
+gzread.obj : gzread.c zutil.h zlib.h zconf.h zlibdefs.h
+gzwrite.obj : gzwrite.c zutil.h zlib.h zconf.h zlibdefs.h
inffast.obj : inffast.c zutil.h zlib.h zconf.h zlibdefs.h inftrees.h inffast.h
inflate.obj : inflate.c zutil.h zlib.h zconf.h zlibdefs.h
inftrees.obj : inftrees.c zutil.h zlib.h zconf.h zlibdefs.h inftrees.h
@@ -416,6 +507,169 @@
$ return
$!------------------------------------------------------------------------------
$!
+$CHECK_CONFIG:
+$!
+$ in_ldef = f$locate(cdef,libdefs)
+$ if (in_ldef .lt. f$length(libdefs))
+$ then
+$ write aconf "#define ''cdef' 1"
+$ libdefs = f$extract(0,in_ldef,libdefs) + -
+ f$extract(in_ldef + f$length(cdef) + 1, -
+ f$length(libdefs) - in_ldef - f$length(cdef) - 1, -
+ libdefs)
+$ else
+$ if (f$type('cdef') .eqs. "INTEGER")
+$ then
+$ write aconf "#define ''cdef' ", 'cdef'
+$ else
+$ if (f$type('cdef') .eqs. "STRING")
+$ then
+$ write aconf "#define ''cdef' ", """", '''cdef'', """"
+$ else
+$ gosub check_cc_def
+$ endif
+$ endif
+$ endif
+$ return
+$!------------------------------------------------------------------------------
+$!
+$! Check if this is a define relating to the properties of the C/C++
+$! compiler
+$!
+$ CHECK_CC_DEF:
+$ if (cdef .eqs. "_LARGEFILE64_SOURCE")
+$ then
+$ copy sys$input: 'tc'
+$ deck
+#include "tconfig"
+#define _LARGEFILE
+#include <stdio.h>
+
+int main(){
+FILE *fp;
+ fp = fopen("temp.txt","r");
+ fseeko(fp,1,SEEK_SET);
+ fclose(fp);
+}
+
+$ eod
+$ test_inv = false
+$ comm_h = false
+$ gosub cc_prop_check
+$ return
+$ endif
+$ write aconf "/* ", line, " */"
+$ return
+$!------------------------------------------------------------------------------
+$!
+$! Check for properties of C/C++ compiler
+$!
+$! Version history
+$! 0.01 20031020 First version to receive a number
+$! 0.02 20031022 Added logic for defines with value
+$! 0.03 20040309 Make sure local config file gets not deleted
+$! 0.04 20041230 Also write include for configure run
+$! 0.05 20050103 Add processing of "comment defines"
+$CC_PROP_CHECK:
+$ cc_prop = true
+$ is_need = false
+$ is_need = (f$extract(0,4,cdef) .eqs. "NEED") .or. (test_inv .eq. true)
+$ if f$search(th) .eqs. "" then create 'th'
+$ set message/nofac/noident/nosever/notext
+$ on error then continue
+$ cc 'tmpnam'
+$ if .not. ($status) then cc_prop = false
+$ on error then continue
+$! The headers might lie about the capabilities of the RTL
+$ link 'tmpnam',tmp.opt/opt
+$ if .not. ($status) then cc_prop = false
+$ set message/fac/ident/sever/text
+$ on error then goto err_exit
+$ delete/nolog 'tmpnam'.*;*/exclude='th'
+$ if (cc_prop .and. .not. is_need) .or. -
+ (.not. cc_prop .and. is_need)
+$ then
+$ write sys$output "Checking for ''cdef'... yes"
+$ if f$type('cdef_val'_yes) .nes. ""
+$ then
+$ if f$type('cdef_val'_yes) .eqs. "INTEGER" -
+ then call write_config f$fao("#define !AS !UL",cdef,'cdef_val'_yes)
+$ if f$type('cdef_val'_yes) .eqs. "STRING" -
+ then call write_config f$fao("#define !AS !AS",cdef,'cdef_val'_yes)
+$ else
+$ call write_config f$fao("#define !AS 1",cdef)
+$ endif
+$ if (cdef .eqs. "HAVE_FSEEKO") .or. (cdef .eqs. "_LARGE_FILES") .or. -
+ (cdef .eqs. "_LARGEFILE64_SOURCE") then -
+ call write_config f$string("#define _LARGEFILE 1")
+$ else
+$ write sys$output "Checking for ''cdef'... no"
+$ if (comm_h)
+$ then
+ call write_config f$fao("/* !AS */",line)
+$ else
+$ if f$type('cdef_val'_no) .nes. ""
+$ then
+$ if f$type('cdef_val'_no) .eqs. "INTEGER" -
+ then call write_config f$fao("#define !AS !UL",cdef,'cdef_val'_no)
+$ if f$type('cdef_val'_no) .eqs. "STRING" -
+ then call write_config f$fao("#define !AS !AS",cdef,'cdef_val'_no)
+$ else
+$ call write_config f$fao("#undef !AS",cdef)
+$ endif
+$ endif
+$ endif
+$ return
+$!------------------------------------------------------------------------------
+$!
+$! Check for properties of C/C++ compiler with multiple result values
+$!
+$! Version history
+$! 0.01 20040127 First version
+$! 0.02 20050103 Reconcile changes from cc_prop up to version 0.05
+$CC_MPROP_CHECK:
+$ cc_prop = true
+$ i = 1
+$ idel = 1
+$ MT_LOOP:
+$ if f$type(result_'i') .eqs. "STRING"
+$ then
+$ set message/nofac/noident/nosever/notext
+$ on error then continue
+$ cc 'tmpnam'_'i'
+$ if .not. ($status) then cc_prop = false
+$ on error then continue
+$! The headers might lie about the capabilities of the RTL
+$ link 'tmpnam'_'i',tmp.opt/opt
+$ if .not. ($status) then cc_prop = false
+$ set message/fac/ident/sever/text
+$ on error then goto err_exit
+$ delete/nolog 'tmpnam'_'i'.*;*
+$ if (cc_prop)
+$ then
+$ write sys$output "Checking for ''cdef'... ", mdef_'i'
+$ if f$type(mdef_'i') .eqs. "INTEGER" -
+ then call write_config f$fao("#define !AS !UL",cdef,mdef_'i')
+$ if f$type('cdef_val'_yes) .eqs. "STRING" -
+ then call write_config f$fao("#define !AS !AS",cdef,mdef_'i')
+$ goto msym_clean
+$ else
+$ i = i + 1
+$ goto mt_loop
+$ endif
+$ endif
+$ write sys$output "Checking for ''cdef'... no"
+$ call write_config f$fao("#undef !AS",cdef)
+$ MSYM_CLEAN:
+$ if (idel .le. msym_max)
+$ then
+$ delete/sym mdef_'idel'
+$ idel = idel + 1
+$ goto msym_clean
+$ endif
+$ return
+$!------------------------------------------------------------------------------
+$!
$! Analyze Object files for OpenVMS AXP to extract Procedure and Data
$! information to build a symbol vector for a shareable image
$! All the "brains" of this logic was suggested by Hartmut Becker
@@ -533,3 +787,16 @@
$ if V then set verify
$ endsubroutine
$!------------------------------------------------------------------------------
+$!
+$! Write configuration to both permanent and temporary config file
+$!
+$! Version history
+$! 0.01 20031029 First version to receive a number
+$!
+$WRITE_CONFIG: SUBROUTINE
+$ write aconf 'p1'
+$ open/append confh 'th'
+$ write confh 'p1'
+$ close confh
+$ENDSUBROUTINE
+$!------------------------------------------------------------------------------
diff --git a/old/zlib.html b/old/zlib.html
deleted file mode 100644
index 8c1b190..0000000
--- a/old/zlib.html
+++ /dev/null
@@ -1,971 +0,0 @@
-<html>
-<head>
- <title>
- zlib general purpose compression library version 1.1.4
- </title>
-</head>
-<body bgcolor="White" text="Black" vlink="Red" alink="Navy" link="Red">
-<!-- background="zlibbg.gif" -->
-
-<h1> zlib 1.1.4 Manual </h1>
-<hr>
-<a name="Contents"><h2>Contents</h2>
-<ol type="I">
-<li> <a href="#Prologue">Prologue</a>
-<li> <a href="#Introduction">Introduction</a>
-<li> <a href="#Utility functions">Utility functions</a>
-<li> <a href="#Basic functions">Basic functions</a>
-<li> <a href="#Advanced functions">Advanced functions</a>
-<li> <a href="#Constants">Constants</a>
-<li> <a href="#struct z_stream_s">struct z_stream_s</a>
-<li> <a href="#Checksum functions">Checksum functions</a>
-<li> <a href="#Misc">Misc</a>
-</ol>
-<hr>
-<a name="Prologue"><h2> Prologue </h2>
- 'zlib' general purpose compression library version 1.1.4, March 11th, 2002
- <p>
- Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
- <p>
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
- <p>
- 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:
- <ol>
- <li> 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.
- <li> Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- <li> This notice may not be removed or altered from any source distribution.
- </ol>
-
- <dl>
- <dt>Jean-loup Gailly
- <dd><a href="mailto:jloup@gzip.org">jloup@gzip.org</a>
- <dt>Mark Adler
- <dd><a href="mailto:madler@alumni.caltech.edu">madler@alumni.caltech.edu</a>
- </dl>
-
- The data format used by the zlib library is described by RFCs (Request for
- Comments) 1950 to 1952 in the files
- <a href="ftp://ds.internic.net/rfc/rfc1950.txt">
- ftp://ds.internic.net/rfc/rfc1950.txt </a>
- (zlib format),
- <a href="ftp://ds.internic.net/rfc/rfc1951.txt">
- rfc1951.txt </a>
- (<a href="#deflate">deflate</a> format) and
- <a href="ftp://ds.internic.net/rfc/rfc1952.txt">
- rfc1952.txt </a>
- (gzip format).
- <p>
- This manual is converted from zlib.h by
- <a href="mailto:piaip@csie.ntu.edu.tw"> piaip </a>
- <p>
- Visit <a href="http://ftp.cdrom.com/pub/infozip/zlib/">
- http://ftp.cdrom.com/pub/infozip/zlib/</a>
- for the official zlib web page.
- <p>
-
-<hr>
-<a name="Introduction"><h2> Introduction </h2>
- The 'zlib' compression library provides in-memory compression and
- decompression functions, including integrity checks of the uncompressed
- data. This version of the library supports only one compression method
- (deflation) but other algorithms will be added later and will have the same
- stream interface.
- <p>
-
- Compression can be done in a single step if the buffers are large
- enough (for example if an input file is mmap'ed), or can be done by
- repeated calls of the compression function. In the latter case, the
- application must provide more input and/or consume the output
- (providing more output space) before each call.
- <p>
-
- The library also supports reading and writing files in gzip (.gz) format
- with an interface similar to that of stdio.
- <p>
-
- The library does not install any signal handler. The decoder checks
- the consistency of the compressed data, so the library should never
- crash even in case of corrupted input.
- <p>
-
-<hr>
-<a name="Utility functions"><h2> Utility functions </h2>
- The following utility functions are implemented on top of the
- <a href="#Basic functions">basic stream-oriented functions</a>.
- To simplify the interface, some
- default options are assumed (compression level and memory usage,
- standard memory allocation functions). The source code of these
- utility functions can easily be modified if you need special options.
-<h3> Function list </h3>
-<ul>
-<li> int <a href="#compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
-<li> int <a href="#compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);
-<li> int <a href="#uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
-<li> typedef voidp gzFile;
-<li> gzFile <a href="#gzopen">gzopen</a> (const char *path, const char *mode);
-<li> gzFile <a href="#gzdopen">gzdopen</a> (int fd, const char *mode);
-<li> int <a href="#gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);
-<li> int <a href="#gzread">gzread</a> (gzFile file, voidp buf, unsigned len);
-<li> int <a href="#gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);
-<li> int VA <a href="#gzprintf">gzprintf</a> (gzFile file, const char *format, ...);
-<li> int <a href="#gzputs">gzputs</a> (gzFile file, const char *s);
-<li> char * <a href="#gzgets">gzgets</a> (gzFile file, char *buf, int len);
-<li> int <a href="#gzputc">gzputc</a> (gzFile file, int c);
-<li> int <a href="#gzgetc">gzgetc</a> (gzFile file);
-<li> int <a href="#gzflush">gzflush</a> (gzFile file, int flush);
-<li> z_off_t <a href="#gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);
-<li> z_off_t <a href="#gztell">gztell</a> (gzFile file);
-<li> int <a href="#gzrewind">gzrewind</a> (gzFile file);
-<li> int <a href="#gzeof">gzeof</a> (gzFile file);
-<li> int <a href="#gzclose">gzclose</a> (gzFile file);
-<li> const char * <a href="#gzerror">gzerror</a> (gzFile file, int *errnum);
-</ul>
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> int <a name="compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
-<dd>
- 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 12 bytes. Upon exit, destLen is the actual size of the
- compressed buffer.<p>
- This function can be used to <a href="#compress">compress</a> a whole file at once if the
- input file is mmap'ed.<p>
- <a href="#compress">compress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
- buffer.<p>
-
-<font color="Blue"><dt> int <a name="compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);</font>
-<dd>
- Compresses the source buffer into the destination buffer. The level
- parameter has the same meaning as in <a href="#deflateInit">deflateInit</a>. 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.
- <p>
-
- <a href="#compress2">compress2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output buffer,
- <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the level parameter is invalid.
- <p>
-
-<font color="Blue"><dt> int <a name="uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
-<dd>
- Decompresses 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 large enough to hold the
- entire uncompressed data. (The size of the uncompressed data must have
- been saved previously by the compressor and transmitted to the decompressor
- by some mechanism outside the scope of this compression library.)
- Upon exit, destLen is the actual size of the compressed buffer. <p>
- This function can be used to decompress a whole file at once if the
- input file is mmap'ed.
- <p>
-
- <a href="#uncompress">uncompress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
- buffer, or <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was corrupted.
- <p>
-
-<dt> typedef voidp gzFile;
-<dd> <p>
-
-<font color="Blue"><dt> gzFile <a name="gzopen">gzopen</a> (const char *path, const char *mode);</font>
-<dd>
- Opens a gzip (.gz) file for reading or writing. The mode parameter
- is as in fopen ("rb" or "wb") but can also include a compression level
- ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
- Huffman only compression as in "wb1h". (See the description
- of <a href="#deflateInit2">deflateInit2</a> for more information about the strategy parameter.)
- <p>
-
- <a href="#gzopen">gzopen</a> can be used to read a file which is not in gzip format ; in this
- case <a href="#gzread">gzread</a> will directly read from the file without decompression.
- <p>
-
- <a href="#gzopen">gzopen</a> returns NULL if the file could not be opened or if there was
- insufficient memory to allocate the (de)compression <a href="#state">state</a> ; errno
- can be checked to distinguish the two cases (if errno is zero, the
- zlib error is <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a>).
- <p>
-
-<font color="Blue"><dt> gzFile <a name="gzdopen">gzdopen</a> (int fd, const char *mode);</font>
-<dd>
- <a href="#gzdopen">gzdopen</a>() associates a gzFile with the file descriptor fd. File
- descriptors are obtained from calls like open, dup, creat, pipe or
- fileno (in the file has been previously opened with fopen).
- The mode parameter is as in <a href="#gzopen">gzopen</a>.
- <p>
- The next call of <a href="#gzclose">gzclose</a> on the returned gzFile will also close the
- file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
- descriptor fd. If you want to keep fd open, use <a href="#gzdopen">gzdopen</a>(dup(fd), mode).
- <p>
- <a href="#gzdopen">gzdopen</a> returns NULL if there was insufficient memory to allocate
- the (de)compression <a href="#state">state</a>.
- <p>
-
-<font color="Blue"><dt> int <a name="gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);</font>
-<dd>
- Dynamically update the compression level or strategy. See the description
- of <a href="#deflateInit2">deflateInit2</a> for the meaning of these parameters.
- <p>
- <a href="#gzsetparams">gzsetparams</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the file was not
- opened for writing.
- <p>
-
-<font color="Blue"><dt> int <a name="gzread">gzread</a> (gzFile file, voidp buf, unsigned len);</font>
-<dd>
- Reads the given number of uncompressed bytes from the compressed file.
- If the input file was not in gzip format, <a href="#gzread">gzread</a> copies the given number
- of bytes into the buffer.
- <p>
- <a href="#gzread">gzread</a> returns the number of uncompressed bytes actually read (0 for
- end of file, -1 for error).
- <p>
-
-<font color="Blue"><dt> int <a name="gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);</font>
-<dd>
- Writes the given number of uncompressed bytes into the compressed file.
- <a href="#gzwrite">gzwrite</a> returns the number of uncompressed bytes actually written
- (0 in case of error).
- <p>
-
-<font color="Blue"><dt> int VA <a name="gzprintf">gzprintf</a> (gzFile file, const char *format, ...);</font>
-<dd>
- Converts, formats, and writes the args to the compressed file under
- control of the format string, as in fprintf. <a href="#gzprintf">gzprintf</a> returns the number of
- uncompressed bytes actually written (0 in case of error).
- <p>
-
-<font color="Blue"><dt> int <a name="gzputs">gzputs</a> (gzFile file, const char *s);</font>
-<dd>
- Writes the given null-terminated string to the compressed file, excluding
- the terminating null character.
- <p>
- <a href="#gzputs">gzputs</a> returns the number of characters written, or -1 in case of error.
- <p>
-
-<font color="Blue"><dt> char * <a name="gzgets">gzgets</a> (gzFile file, char *buf, int len);</font>
-<dd>
- Reads bytes from the compressed file until len-1 characters are read, or
- a newline character is read and transferred to buf, or an end-of-file
- condition is encountered. The string is then terminated with a null
- character.
- <p>
- <a href="#gzgets">gzgets</a> returns buf, or <a href="#Z_NULL">Z_NULL</a> in case of error.
- <p>
-
-<font color="Blue"><dt> int <a name="gzputc">gzputc</a> (gzFile file, int c);</font>
-<dd>
- Writes c, converted to an unsigned char, into the compressed file.
- <a href="#gzputc">gzputc</a> returns the value that was written, or -1 in case of error.
- <p>
-
-<font color="Blue"><dt> int <a name="gzgetc">gzgetc</a> (gzFile file);</font>
-<dd>
- Reads one byte from the compressed file. <a href="#gzgetc">gzgetc</a> returns this byte
- or -1 in case of end of file or error.
- <p>
-
-<font color="Blue"><dt> int <a name="gzflush">gzflush</a> (gzFile file, int flush);</font>
-<dd>
- Flushes all pending output into the compressed file. The parameter
- flush is as in the <a href="#deflate">deflate</a>() function. The return value is the zlib
- error number (see function <a href="#gzerror">gzerror</a> below). <a href="#gzflush">gzflush</a> returns <a href="#Z_OK">Z_OK</a> if
- the flush parameter is <a href="#Z_FINISH">Z_FINISH</a> and all output could be flushed.
- <p>
- <a href="#gzflush">gzflush</a> should be called only when strictly necessary because it can
- degrade compression.
- <p>
-
-<font color="Blue"><dt> z_off_t <a name="gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);</font>
-<dd>
- Sets the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
- given compressed file. The offset represents a number of bytes in the
- uncompressed data stream. The whence parameter is defined as in lseek(2);
- the value SEEK_END is not supported.
- <p>
- If the file is opened for reading, this function is emulated but can be
- extremely slow. If the file is opened for writing, only forward seeks are
- supported ; <a href="#gzseek">gzseek</a> then compresses a sequence of zeroes up to the new
- starting position.
- <p>
- <a href="#gzseek">gzseek</a> returns the resulting offset location as measured in bytes from
- the beginning of the uncompressed stream, or -1 in case of error, in
- particular if the file is opened for writing and the new starting position
- would be before the current position.
- <p>
-
-<font color="Blue"><dt> int <a name="gzrewind">gzrewind</a> (gzFile file);</font>
-<dd>
- Rewinds the given file. This function is supported only for reading.
- <p>
- <a href="#gzrewind">gzrewind</a>(file) is equivalent to (int)<a href="#gzseek">gzseek</a>(file, 0L, SEEK_SET)
- <p>
-
-<font color="Blue"><dt> z_off_t <a name="gztell">gztell</a> (gzFile file);</font>
-<dd>
- Returns the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
- given compressed file. This position represents a number of bytes in the
- uncompressed data stream.
- <p>
-
- <a href="#gztell">gztell</a>(file) is equivalent to <a href="#gzseek">gzseek</a>(file, 0L, SEEK_CUR)
- <p>
-
-<font color="Blue"><dt> int <a name="gzeof">gzeof</a> (gzFile file);</font>
-<dd>
- Returns 1 when EOF has previously been detected reading the given
- input stream, otherwise zero.
- <p>
-
-<font color="Blue"><dt> int <a name="gzclose">gzclose</a> (gzFile file);</font>
-<dd>
- Flushes all pending output if necessary, closes the compressed file
- and deallocates all the (de)compression <a href="#state">state</a>. The return value is the zlib
- error number (see function <a href="#gzerror">gzerror</a> below).
- <p>
-
-<font color="Blue"><dt> const char * <a name="gzerror">gzerror</a> (gzFile file, int *errnum);</font>
-<dd>
- Returns the error message for the last error which occurred on the
- given compressed file. errnum is set to zlib error number. If an
- error occurred in the file system and not in the compression library,
- errnum is set to <a href="#Z_ERRNO">Z_ERRNO</a> and the application may consult errno
- to get the exact error code.
- <p>
-</dl>
-<hr>
-<a name="Basic functions"><h2> Basic functions </h2>
-<h3> Function list </h3>
-<ul>
-<li> const char * <a href="#zlibVersion">zlibVersion</a> (void);
-<li> int <a href="#deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);
-<li> int <a href="#deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
-<li> int <a href="#deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
-<li> int <a href="#inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
-</ul>
-
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> const char * <a name="zlibVersion">zlibVersion</a> (void);</font>
-<dd> The application can compare <a href="#zlibVersion">zlibVersion</a> and ZLIB_VERSION for consistency.
- If the first character differs, the library code actually used is
- not compatible with the zlib.h header file used by the application.
- This check is automatically made by <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a>.
- <p>
-
-<font color="Blue"><dt> int <a name="deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);</font>
-<dd>
- Initializes the internal stream <a href="#state">state</a> for compression. The fields
- <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by the caller.
- If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#deflateInit">deflateInit</a> updates them to
- use default allocation functions.
- <p>
-
- The compression level must be <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a>, or between 0 and 9:
- 1 gives best speed, 9 gives best compression, 0 gives no compression at
- all (the input data is simply copied a block at a time).
- <p>
-
- <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> requests a default compromise between speed and
- compression (currently equivalent to level 6).
- <p>
-
- <a href="#deflateInit">deflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if level is not a valid compression level,
- <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version (<a href="#zlib_version">zlib_version</a>) is incompatible
- with the version assumed by the caller (ZLIB_VERSION).
- <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit">deflateInit</a> does not
- perform any compression: this will be done by <a href="#deflate">deflate</a>().
- <p>
-
-<font color="Blue"><dt> int <a name="deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
-<dd>
- <a href="#deflate">deflate</a> compresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may introduce some
- output latency (reading input without producing any output) except when
- forced to flush.<p>
-
- The detailed semantics are as follows. <a href="#deflate">deflate</a> performs one or both of the
- following actions:
-
- <ul>
- <li> Compress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> are updated and
- processing will resume at this point for the next call of <a href="#deflate">deflate</a>().
-
- <li>
- Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a>
- accordingly. This action is forced if the parameter flush is non zero.
- Forcing flush frequently degrades the compression ratio, so this parameter
- should be set only when necessary (in interactive applications).
- Some output may be provided even if flush is not set.
- </ul> <p>
-
- Before the call of <a href="#deflate">deflate</a>(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> accordingly ; <a href="#avail_out">avail_out</a>
- should never be zero before the call. The application can consume the
- compressed output when it wants, for example when the output buffer is full
- (<a href="#avail_out">avail_out</a> == 0), or after each call of <a href="#deflate">deflate</a>(). If <a href="#deflate">deflate</a> returns <a href="#Z_OK">Z_OK</a>
- and with zero <a href="#avail_out">avail_out</a>, it must be called again after making room in the
- output buffer because there might be more output pending.
- <p>
-
- If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, all pending output is
- flushed to the output buffer and the output is aligned on a byte boundary, so
- that the decompressor can get all input data available so far. (In particular
- <a href="#avail_in">avail_in</a> is zero after the call if enough output space has been provided
- before the call.) Flushing may degrade compression for some compression
- algorithms and so it should be used only when necessary.
- <p>
-
- If flush is set to <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>, all output is flushed as with
- <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, and the compression <a href="#state">state</a> is reset so that decompression can
- restart from this point if previous compressed data has been damaged or if
- random access is desired. Using <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a> too often can seriously degrade
- the compression.
- <p>
-
- If <a href="#deflate">deflate</a> returns with <a href="#avail_out">avail_out</a> == 0, this function must be called again
- with the same value of the flush parameter and more output space (updated
- <a href="#avail_out">avail_out</a>), until the flush is complete (<a href="#deflate">deflate</a> returns with non-zero
- <a href="#avail_out">avail_out</a>).
- <p>
-
- If the parameter flush is set to <a href="#Z_FINISH">Z_FINISH</a>, pending input is processed,
- pending output is flushed and <a href="#deflate">deflate</a> returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> if there
- was enough output space ; if <a href="#deflate">deflate</a> returns with <a href="#Z_OK">Z_OK</a>, this function must be
- called again with <a href="#Z_FINISH">Z_FINISH</a> and more output space (updated <a href="#avail_out">avail_out</a>) but no
- more input data, until it returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> or an error. After
- <a href="#deflate">deflate</a> has returned <a href="#Z_STREAM_END">Z_STREAM_END</a>, the only possible operations on the
- stream are <a href="#deflateReset">deflateReset</a> or <a href="#deflateEnd">deflateEnd</a>.
- <p>
-
- <a href="#Z_FINISH">Z_FINISH</a> can be used immediately after <a href="#deflateInit">deflateInit</a> if all the compression
- is to be done in a single step. In this case, <a href="#avail_out">avail_out</a> must be at least
- 0.1% larger than <a href="#avail_in">avail_in</a> plus 12 bytes. If <a href="#deflate">deflate</a> does not return
- <a href="#Z_STREAM_END">Z_STREAM_END</a>, then it must be called again as described above.
- <p>
-
- <a href="#deflate">deflate</a>() sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all input read
- so far (that is, <a href="#total_in">total_in</a> bytes).
- <p>
-
- <a href="#deflate">deflate</a>() may update <a href="#data_type">data_type</a> if it can make a good guess about
- the input data type (<a href="#Z_ASCII">Z_ASCII</a> or <a href="#Z_BINARY">Z_BINARY</a>). In doubt, the data is considered
- binary. This field is only for information purposes and does not affect
- the compression algorithm in any manner.
- <p>
-
- <a href="#deflate">deflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input
- processed or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if all input has been
- consumed and all output has been produced (only when flush is set to
- <a href="#Z_FINISH">Z_FINISH</a>), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a> was inconsistent (for example
- if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible
- (for example <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> was zero).
- <p>
-
-<font color="Blue"><dt> int <a name="deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
- <p>
-
- <a href="#deflateEnd">deflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the
- stream <a href="#state">state</a> was inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the stream was freed
- prematurely (some input or output was discarded). In the error case,
- <a href="#msg">msg</a> may be set but then points to a static string (which must not be
- deallocated).
- <p>
-
-<font color="Blue"><dt> int <a name="inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- Initializes the internal stream <a href="#state">state</a> for decompression. The fields
- <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
- the caller. If <a href="#next_in">next_in</a> is not <a href="#Z_NULL">Z_NULL</a> and <a href="#avail_in">avail_in</a> is large enough (the exact
- value depends on the compression method), <a href="#inflateInit">inflateInit</a> determines the
- compression method from the zlib header and allocates all data structures
- accordingly ; otherwise the allocation will be deferred to the first call of
- <a href="#inflate">inflate</a>. If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#inflateInit">inflateInit</a> updates them to
- use default allocation functions.
- <p>
-
- <a href="#inflateInit">inflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version is incompatible with the
- version assumed by the caller. <a href="#msg">msg</a> is set to null if there is no error
- message. <a href="#inflateInit">inflateInit</a> does not perform any decompression apart from reading
- the zlib header if present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and
- <a href="#avail_in">avail_in</a> may be modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)
- <p>
-
-<font color="Blue"><dt> int <a name="inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
-<dd>
- <a href="#inflate">inflate</a> decompresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may some
- introduce some output latency (reading input without producing any output)
- except when forced to flush.
- <p>
-
- The detailed semantics are as follows. <a href="#inflate">inflate</a> performs one or both of the
- following actions:
-
- <ul>
- <li> Decompress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), <a href="#next_in">next_in</a> is updated and processing
- will resume at this point for the next call of <a href="#inflate">inflate</a>().
-
- <li> Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and
- <a href="#avail_out">avail_out</a> accordingly. <a href="#inflate">inflate</a>() provides as much output as possible,
- until there is no more input data or no more space in the output buffer
- (see below about the flush parameter).
- </ul> <p>
-
- Before the call of <a href="#inflate">inflate</a>(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating the next_* and avail_* values accordingly.
- The application can consume the uncompressed output when it wants, for
- example when the output buffer is full (<a href="#avail_out">avail_out</a> == 0), or after each
- call of <a href="#inflate">inflate</a>(). If <a href="#inflate">inflate</a> returns <a href="#Z_OK">Z_OK</a> and with zero <a href="#avail_out">avail_out</a>, it
- must be called again after making room in the output buffer because there
- might be more output pending.
- <p>
-
- If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, <a href="#inflate">inflate</a> flushes as much
- output as possible to the output buffer. The flushing behavior of <a href="#inflate">inflate</a> is
- not specified for values of the flush parameter other than <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>
- and <a href="#Z_FINISH">Z_FINISH</a>, but the current implementation actually flushes as much output
- as possible anyway.
- <p>
-
- <a href="#inflate">inflate</a>() should normally be called until it returns <a href="#Z_STREAM_END">Z_STREAM_END</a> or an
- error. However if all decompression is to be performed in a single step
- (a single call of <a href="#inflate">inflate</a>), the parameter flush should be set to
- <a href="#Z_FINISH">Z_FINISH</a>. In this case all pending input is processed and all pending
- output is flushed ; <a href="#avail_out">avail_out</a> must be large enough to hold all the
- uncompressed data. (The size of the uncompressed data may have been saved
- by the compressor for this purpose.) The next operation on this stream must
- be <a href="#inflateEnd">inflateEnd</a> to deallocate the decompression <a href="#state">state</a>. The use of <a href="#Z_FINISH">Z_FINISH</a>
- is never required, but can be used to inform <a href="#inflate">inflate</a> that a faster routine
- may be used for the single <a href="#inflate">inflate</a>() call.
- <p>
-
- If a preset dictionary is needed at this point (see <a href="#inflateSetDictionary">inflateSetDictionary</a>
- below), <a href="#inflate">inflate</a> sets strm-<a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of the
- dictionary chosen by the compressor and returns <a href="#Z_NEED_DICT">Z_NEED_DICT</a> ; otherwise
- it sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all output produced
- so far (that is, <a href="#total_out">total_out</a> bytes) and returns <a href="#Z_OK">Z_OK</a>, <a href="#Z_STREAM_END">Z_STREAM_END</a> or
- an error code as described below. At the end of the stream, <a href="#inflate">inflate</a>()
- checks that its computed <a href="#adler32">adler32</a> checksum is equal to that saved by the
- compressor and returns <a href="#Z_STREAM_END">Z_STREAM_END</a> only if the checksum is correct.
- <p>
-
- <a href="#inflate">inflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input processed
- or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if the end of the compressed data has
- been reached and all uncompressed output has been produced, <a href="#Z_NEED_DICT">Z_NEED_DICT</a> if a
- preset dictionary is needed at this point, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was
- corrupted (input stream not conforming to the zlib format or incorrect
- <a href="#adler32">adler32</a> checksum), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent
- (for example if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible or if there was not
- enough room in the output buffer when <a href="#Z_FINISH">Z_FINISH</a> is used. In the <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a>
- case, the application may then call <a href="#inflateSync">inflateSync</a> to look for a good
- compression block.
- <p>
-
-<font color="Blue"><dt> int <a name="inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
- <p>
-
- <a href="#inflateEnd">inflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a>
- was inconsistent. In the error case, <a href="#msg">msg</a> may be set but then points to a
- static string (which must not be deallocated).
-</dl>
-<hr>
-<a name="Advanced functions"><h2> Advanced functions </h2>
- The following functions are needed only in some special applications.
-<h3> Function list </h3>
-<ul>
-<li> int <a href="#deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm,
-<li> int <a href="#deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
-<li> int <a href="#deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);
-<li> int <a href="#deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);
-<li> int <a href="#inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);
-<li> int <a href="#inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
-<li> int <a href="#inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
-
-</ul>
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> int <a name="deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int method, int windowBits, int memLevel, int strategy);</font>
-
-<dd> This is another version of <a href="#deflateInit">deflateInit</a> with more compression options. The
- fields <a href="#next_in">next_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
- the caller.<p>
-
- The method parameter is the compression method. It must be <a href="#Z_DEFLATED">Z_DEFLATED</a> in
- this version of the library.<p>
-
- The windowBits parameter is the base two logarithm of the window size
- (the size of the history buffer). It should be in the range 8..15 for this
- version of the library. Larger values of this parameter result in better
- compression at the expense of memory usage. The default value is 15 if
- <a href="#deflateInit">deflateInit</a> is used instead.<p>
-
- The memLevel parameter specifies how much memory should be allocated
- for the internal compression <a href="#state">state</a>. memLevel=1 uses minimum memory but
- is slow and reduces compression ratio ; memLevel=9 uses maximum memory
- for optimal speed. The default value is 8. See zconf.h for total memory
- usage as a function of windowBits and memLevel.<p>
-
- The strategy parameter is used to tune the compression algorithm. Use the
- value <a href="#Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> for normal data, <a href="#Z_FILTERED">Z_FILTERED</a> for data produced by a
- filter (or predictor), or <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> to force Huffman encoding only (no
- string match). Filtered data consists mostly of small values with a
- somewhat random distribution. In this case, the compression algorithm is
- tuned to <a href="#compress">compress</a> them better. The effect of <a href="#Z_FILTERED">Z_FILTERED</a> is to force more
- Huffman coding and less string matching ; it is somewhat intermediate
- between Z_DEFAULT and <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a>. The strategy parameter only affects
- the compression ratio but not the correctness of the compressed output even
- if it is not set appropriately.<p>
-
- <a href="#deflateInit2">deflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as an invalid
- method). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit2">deflateInit2</a> does
- not perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
-
-<font color="Blue"><dt> int <a name="deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
-<dd>
- Initializes the compression dictionary from the given byte sequence
- without producing any compressed output. This function must be called
- immediately after <a href="#deflateInit">deflateInit</a>, <a href="#deflateInit2">deflateInit2</a> or <a href="#deflateReset">deflateReset</a>, before any
- call of <a href="#deflate">deflate</a>. The compressor and decompressor must use exactly the same
- dictionary (see <a href="#inflateSetDictionary">inflateSetDictionary</a>).<p>
-
- The dictionary should consist of strings (byte sequences) that are likely
- to be encountered later in the data to be compressed, with the most commonly
- used strings preferably put towards the end of the dictionary. Using a
- dictionary is most useful when the data to be compressed is short and can be
- predicted with good accuracy ; the data can then be compressed better than
- with the default empty dictionary.<p>
-
- Depending on the size of the compression data structures selected by
- <a href="#deflateInit">deflateInit</a> or <a href="#deflateInit2">deflateInit2</a>, a part of the dictionary may in effect be
- discarded, for example if the dictionary is larger than the window size in
- <a href="#deflate">deflate</a> or deflate2. Thus the strings most likely to be useful should be
- put at the end of the dictionary, not at the front.<p>
-
- Upon return of this function, strm-> <a href="#adler">adler</a> is set to the Adler32 value
- of the dictionary ; the decompressor may later use this value to determine
- which dictionary has been used by the compressor. (The Adler32 value
- applies to the whole dictionary even if only a subset of the dictionary is
- actually used by the compressor.)<p>
-
- <a href="#deflateSetDictionary">deflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
- parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
- inconsistent (for example if <a href="#deflate">deflate</a> has already been called for this stream
- or if the compression method is bsort). <a href="#deflateSetDictionary">deflateSetDictionary</a> does not
- perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
-
-<font color="Blue"><dt> int <a name="deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);</font>
-<dd>
- Sets the destination stream as a complete copy of the source stream.<p>
-
- This function can be useful when several compression strategies will be
- tried, for example when there are several ways of pre-processing the input
- data with a filter. The streams that will be discarded should then be freed
- by calling <a href="#deflateEnd">deflateEnd</a>. Note that <a href="#deflateCopy">deflateCopy</a> duplicates the internal
- compression <a href="#state">state</a> which can be quite large, so this strategy is slow and
- can consume lots of memory.<p>
-
- <a href="#deflateCopy">deflateCopy</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source stream <a href="#state">state</a> was inconsistent
- (such as <a href="#zalloc">zalloc</a> being NULL). <a href="#msg">msg</a> is left unchanged in both source and
- destination.<p>
-
-<font color="Blue"><dt> int <a name="deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd> This function is equivalent to <a href="#deflateEnd">deflateEnd</a> followed by <a href="#deflateInit">deflateInit</a>,
- but does not free and reallocate all the internal compression <a href="#state">state</a>.
- The stream will keep the same compression level and any other attributes
- that may have been set by <a href="#deflateInit2">deflateInit2</a>.<p>
-
- <a href="#deflateReset">deflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
- stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).<p>
-
-<font color="Blue"><dt> int <a name="deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);</font>
-<dd>
- Dynamically update the compression level and compression strategy. The
- interpretation of level and strategy is as in <a href="#deflateInit2">deflateInit2</a>. This can be
- used to switch between compression and straight copy of the input data, or
- to switch to a different kind of input data requiring a different
- strategy. If the compression level is changed, the input available so far
- is compressed with the old level (and may be flushed); the new level will
- take effect only at the next call of <a href="#deflate">deflate</a>().<p>
-
- Before the call of <a href="#deflateParams">deflateParams</a>, the stream <a href="#state">state</a> must be set as for
- a call of <a href="#deflate">deflate</a>(), since the currently available input may have to
- be compressed and flushed. In particular, strm-> <a href="#avail_out">avail_out</a> must be
- non-zero.<p>
-
- <a href="#deflateParams">deflateParams</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
- stream <a href="#state">state</a> was inconsistent or if a parameter was invalid, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
- if strm->avail_out was zero.<p>
-
-<font color="Blue"><dt> int <a name="inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);</font>
-
-<dd> This is another version of <a href="#inflateInit">inflateInit</a> with an extra parameter. The
- fields <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized
- before by the caller.<p>
-
- The windowBits parameter is the base two logarithm of the maximum window
- size (the size of the history buffer). It should be in the range 8..15 for
- this version of the library. The default value is 15 if <a href="#inflateInit">inflateInit</a> is used
- instead. If a compressed stream with a larger window size is given as
- input, <a href="#inflate">inflate</a>() will return with the error code <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> instead of
- trying to allocate a larger window.<p>
-
- <a href="#inflateInit2">inflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as a negative
- memLevel). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#inflateInit2">inflateInit2</a>
- does not perform any decompression apart from reading the zlib header if
- present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> may be
- modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)<p>
-
-<font color="Blue"><dt> int <a name="inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
-<dd>
- Initializes the decompression dictionary from the given uncompressed byte
- sequence. This function must be called immediately after a call of <a href="#inflate">inflate</a>
- if this call returned <a href="#Z_NEED_DICT">Z_NEED_DICT</a>. The dictionary chosen by the compressor
- can be determined from the Adler32 value returned by this call of
- <a href="#inflate">inflate</a>. The compressor and decompressor must use exactly the same
- dictionary (see <a href="#deflateSetDictionary">deflateSetDictionary</a>).<p>
-
- <a href="#inflateSetDictionary">inflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
- parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
- inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the given dictionary doesn't match the
- expected one (incorrect Adler32 value). <a href="#inflateSetDictionary">inflateSetDictionary</a> does not
- perform any decompression: this will be done by subsequent calls of
- <a href="#inflate">inflate</a>().<p>
-
-<font color="Blue"><dt> int <a name="inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-
-<dd> Skips invalid compressed data until a full flush point (see above the
- description of <a href="#deflate">deflate</a> with <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>) can be found, or until all
- available input is skipped. No output is provided.<p>
-
- <a href="#inflateSync">inflateSync</a> returns <a href="#Z_OK">Z_OK</a> if a full flush point has been found, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
- if no more input was provided, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if no flush point has been found,
- or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent. In the success
- case, the application may save the current current value of <a href="#total_in">total_in</a> which
- indicates where valid compressed data was found. In the error case, the
- application may repeatedly call <a href="#inflateSync">inflateSync</a>, providing more input each time,
- until success or end of the input data.<p>
-
-<font color="Blue"><dt> int <a name="inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- This function is equivalent to <a href="#inflateEnd">inflateEnd</a> followed by <a href="#inflateInit">inflateInit</a>,
- but does not free and reallocate all the internal decompression <a href="#state">state</a>.
- The stream will keep attributes that may have been set by <a href="#inflateInit2">inflateInit2</a>.
- <p>
-
- <a href="#inflateReset">inflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
- stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).
- <p>
-</dl>
-
-<hr>
-<a name="Checksum functions"><h2> Checksum functions </h2>
- These functions are not related to compression but are exported
- anyway because they might be useful in applications using the
- compression library.
-<h3> Function list </h3>
-<ul>
-<li> uLong <a href="#adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);
-<li> uLong <a href="#crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);
-</ul>
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> uLong <a name="adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);</font>
-<dd>
- Update a running Adler-32 checksum with the bytes buf[0..len-1] and
- return the updated checksum. If buf is NULL, this function returns
- the required initial value for the checksum.
- <p>
- An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
- much faster. Usage example:
- <pre>
-
- uLong <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
-
- while (read_buffer(buffer, length) != EOF) {
- <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(<a href="#adler">adler</a>, buffer, length);
- }
- if (<a href="#adler">adler</a> != original_adler) error();
- </pre>
-
-<font color="Blue"><dt> uLong <a name="crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);</font>
-<dd>
- Update a running crc with the bytes buf[0..len-1] and return the updated
- crc. If buf is NULL, this function returns the required initial value
- for the crc. Pre- and post-conditioning (one's complement) is performed
- within this function so it shouldn't be done by the application.
- Usage example:
- <pre>
-
- uLong crc = <a href="#crc32">crc32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
-
- while (read_buffer(buffer, length) != EOF) {
- crc = <a href="#crc32">crc32</a>(crc, buffer, length);
- }
- if (crc != original_crc) error();
- </pre>
-</dl>
-<hr>
-<a name="struct z_stream_s"><h2> struct z_stream_s </h2>
-<font color="Blue">
-<a name="z_stream_s">
-<pre>
-typedef struct z_stream_s {
- Bytef *<a name="next_in">next_in</a>; /* next input byte */
- uInt <a name="avail_in">avail_in</a>; /* number of bytes available at <a href="#next_in">next_in</a> */
- uLong <a name="total_in">total_in</a>; /* total nb of input bytes read so far */
-
- Bytef *<a name="next_out">next_out</a>; /* next output byte should be put there */
- uInt <a name="avail_out">avail_out</a>; /* remaining free space at <a href="#next_out">next_out</a> */
- uLong <a name="total_out">total_out</a>; /* total nb of bytes output so far */
-
- char *<a name="msg">msg</a>; /* last error message, NULL if no error */
- struct internal_state FAR *<a name="state">state</a>; /* not visible by applications */
-
- alloc_func <a name="zalloc">zalloc</a>; /* used to allocate the internal <a href="#state">state</a> */
- free_func <a name="zfree">zfree</a>; /* used to free the internal <a href="#state">state</a> */
- voidpf <a name="opaque">opaque</a>; /* private data object passed to <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> */
-
- int <a name="data_type">data_type</a>; /* best guess about the data type: ascii or binary */
- uLong <a name="adler">adler</a>; /* <a href="#adler32">adler32</a> value of the uncompressed data */
- uLong <a name="reserved">reserved</a>; /* <a href="#reserved">reserved</a> for future use */
-} <a href="#z_stream_s">z_stream</a> ;
-
-typedef <a href="#z_stream_s">z_stream</a> FAR * <a name="z_streamp">z_streamp</a>; ÿ
-</pre>
-</font>
- The application must update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> when <a href="#avail_in">avail_in</a> has
- dropped to zero. It must update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> when <a href="#avail_out">avail_out</a>
- has dropped to zero. The application must initialize <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and
- <a href="#opaque">opaque</a> before calling the init function. All other fields are set by the
- compression library and must not be updated by the application. <p>
-
- The <a href="#opaque">opaque</a> value provided by the application will be passed as the first
- parameter for calls of <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a>. This can be useful for custom
- memory management. The compression library attaches no meaning to the
- <a href="#opaque">opaque</a> value. <p>
-
- <a href="#zalloc">zalloc</a> must return <a href="#Z_NULL">Z_NULL</a> if there is not enough memory for the object.
- If zlib is used in a multi-threaded application, <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be
- thread safe. <p>
-
- On 16-bit systems, the functions <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be able to allocate
- exactly 65536 bytes, but will not be required to allocate more than this
- if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
- pointers returned by <a href="#zalloc">zalloc</a> for objects of exactly 65536 bytes *must*
- have their offset normalized to zero. The default allocation function
- provided by this library ensures this (see zutil.c). To reduce memory
- requirements and avoid any allocation of 64K objects, at the expense of
- compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
- <p>
-
- The fields <a href="#total_in">total_in</a> and <a href="#total_out">total_out</a> can be used for statistics or
- progress reports. After compression, <a href="#total_in">total_in</a> holds the total size of
- the uncompressed data and may be saved for use in the decompressor
- (particularly if the decompressor wants to decompress everything in
- a single step). <p>
-
-<hr>
-<a name="Constants"><h2> Constants </h2>
-<font color="Blue">
-<pre>
-#define <a name="Z_NO_FLUSH">Z_NO_FLUSH</a> 0
-#define <a name="Z_PARTIAL_FLUSH">Z_PARTIAL_FLUSH</a> 1
- /* will be removed, use <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> instead */
-#define <a name="Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> 2
-#define <a name="Z_FULL_FLUSH">Z_FULL_FLUSH</a> 3
-#define <a name="Z_FINISH">Z_FINISH</a> 4
-/* Allowed flush values ; see <a href="#deflate">deflate</a>() below for details */
-
-#define <a name="Z_OK">Z_OK</a> 0
-#define <a name="Z_STREAM_END">Z_STREAM_END</a> 1
-#define <a name="Z_NEED_DICT">Z_NEED_DICT</a> 2
-#define <a name="Z_ERRNO">Z_ERRNO</a> (-1)
-#define <a name="Z_STREAM_ERROR">Z_STREAM_ERROR</a> (-2)
-#define <a name="Z_DATA_ERROR">Z_DATA_ERROR</a> (-3)
-#define <a name="Z_MEM_ERROR">Z_MEM_ERROR</a> (-4)
-#define <a name="Z_BUF_ERROR">Z_BUF_ERROR</a> (-5)
-#define <a name="Z_VERSION_ERROR">Z_VERSION_ERROR</a> (-6)
-/* Return codes for the compression/decompression functions. Negative
- * values are errors, positive values are used for special but normal events.
- */
-
-#define <a name="Z_NO_COMPRESSION">Z_NO_COMPRESSION</a> 0
-#define <a name="Z_BEST_SPEED">Z_BEST_SPEED</a> 1
-#define <a name="Z_BEST_COMPRESSION">Z_BEST_COMPRESSION</a> 9
-#define <a name="Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> (-1)
-/* compression levels */
-
-#define <a name="Z_FILTERED">Z_FILTERED</a> 1
-#define <a name="Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> 2
-#define <a name="Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> 0
-/* compression strategy ; see <a href="#deflateInit2">deflateInit2</a>() below for details */
-
-#define <a name="Z_BINARY">Z_BINARY</a> 0
-#define <a name="Z_ASCII">Z_ASCII</a> 1
-#define <a name="Z_UNKNOWN">Z_UNKNOWN</a> 2
-/* Possible values of the <a href="#data_type">data_type</a> field */
-
-#define <a name="Z_DEFLATED">Z_DEFLATED</a> 8
-/* The <a href="#deflate">deflate</a> compression method (the only one supported in this version) */
-
-#define <a name="Z_NULL">Z_NULL</a> 0 /* for initializing <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a>, <a href="#opaque">opaque</a> */
-
-#define <a name="zlib_version">zlib_version</a> <a href="#zlibVersion">zlibVersion</a>()
-/* for compatibility with versions less than 1.0.2 */
-</pre>
-</font>
-
-<hr>
-<a name="Misc"><h2> Misc </h2>
- <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a> are macros to allow checking the zlib version
- and the compiler's view of <a href="#z_stream_s">z_stream</a>.
- <p>
- Other functions:
- <dl>
- <font color="Blue"><dt> const char * <a name="zError">zError</a> (int err);</font>
- <font color="Blue"><dt> int <a name="inflateSyncPoint">inflateSyncPoint</a> (<a href="#z_streamp">z_streamp</a> z);</font>
- <font color="Blue"><dt> const uLongf * <a name="get_crc_table">get_crc_table</a> (void);</font>
- </dl>
- <hr>
- <font size="-1">
- Last update: Wed Oct 13 20:42:34 1999<br>
- piapi@csie.ntu.edu.tw
- </font>
-
-</body>
-</html>
diff --git a/qnx/package.qpg b/qnx/package.qpg
index a4872b0..384bcf2 100644
--- a/qnx/package.qpg
+++ b/qnx/package.qpg
@@ -25,10 +25,10 @@
<QPG:Files>
<QPG:Add file="../zconf.h" install="/opt/include/" user="root:sys" permission="644"/>
<QPG:Add file="../zlib.h" install="/opt/include/" user="root:sys" permission="644"/>
- <QPG:Add file="../libz.so.1.2.3.5" install="/opt/lib/" user="root:bin" permission="644"/>
- <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.3.5"/>
- <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.3.5"/>
- <QPG:Add file="../libz.so.1.2.3.5" install="/opt/lib/" component="slib"/>
+ <QPG:Add file="../libz.so.1.2.3.6" install="/opt/lib/" user="root:bin" permission="644"/>
+ <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.3.6"/>
+ <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.3.6"/>
+ <QPG:Add file="../libz.so.1.2.3.6" install="/opt/lib/" component="slib"/>
</QPG:Files>
<QPG:PackageFilter>
@@ -63,7 +63,7 @@
</QPM:ProductDescription>
<QPM:ReleaseDescription>
- <QPM:ReleaseVersion>1.2.3.5</QPM:ReleaseVersion>
+ <QPM:ReleaseVersion>1.2.3.6</QPM:ReleaseVersion>
<QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
<QPM:ReleaseStability>Stable</QPM:ReleaseStability>
<QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
diff --git a/uncompr.c b/uncompr.c
index b59e3d0..ad98be3 100644
--- a/uncompr.c
+++ b/uncompr.c
@@ -1,5 +1,5 @@
/* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2003, 2010 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -16,8 +16,6 @@
been saved previously by the compressor and transmitted to the decompressor
by some mechanism outside the scope of this compression library.)
Upon exit, destLen is the actual size of the compressed buffer.
- This function can be used to decompress a whole file at once if the
- input file is mmap'ed.
uncompress 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
diff --git a/zconf.h b/zconf.h
index 5a2d1ef..0661898 100644
--- a/zconf.h
+++ b/zconf.h
@@ -382,19 +382,19 @@
/* MVS linker does not support external names larger than 8 bytes */
#if defined(__MVS__)
-# pragma map(deflateInit_,"DEIN")
-# pragma map(deflateInit2_,"DEIN2")
-# pragma map(deflateEnd,"DEEND")
-# pragma map(deflateBound,"DEBND")
-# pragma map(inflateInit_,"ININ")
-# pragma map(inflateInit2_,"ININ2")
-# pragma map(inflateEnd,"INEND")
-# pragma map(inflateSync,"INSY")
-# pragma map(inflateSetDictionary,"INSEDI")
-# pragma map(compressBound,"CMBND")
-# pragma map(inflate_table,"INTABL")
-# pragma map(inflate_fast,"INFA")
-# pragma map(inflate_copyright,"INCOPY")
+ #pragma map(deflateInit_,"DEIN")
+ #pragma map(deflateInit2_,"DEIN2")
+ #pragma map(deflateEnd,"DEEND")
+ #pragma map(deflateBound,"DEBND")
+ #pragma map(inflateInit_,"ININ")
+ #pragma map(inflateInit2_,"ININ2")
+ #pragma map(inflateEnd,"INEND")
+ #pragma map(inflateSync,"INSY")
+ #pragma map(inflateSetDictionary,"INSEDI")
+ #pragma map(compressBound,"CMBND")
+ #pragma map(inflate_table,"INTABL")
+ #pragma map(inflate_fast,"INFA")
+ #pragma map(inflate_copyright,"INCOPY")
#endif
#endif /* ZCONF_H */
diff --git a/zlib.3 b/zlib.3
index db44e9d..802db88 100644
--- a/zlib.3
+++ b/zlib.3
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "8 January 2010"
+.TH ZLIB 3 "17 January 2010"
.SH NAME
zlib \- compression/decompression library
.SH SYNOPSIS
@@ -17,7 +17,6 @@
and will have the same stream interface.
.LP
Compression can be done in a single step if the buffers are large enough
-(for example if an input file is mmap'ed),
or can be done by repeated calls of the compression function.
In the latter case,
the application must provide more input and/or consume the output
@@ -133,8 +132,8 @@
Send questions and/or comments to zlib@gzip.org,
or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
.SH AUTHORS
-Version 1.2.3.5
-Copyright (C) 1995-2009 Jean-loup Gailly (jloup@gzip.org)
+Version 1.2.3.6
+Copyright (C) 1995-2010 Jean-loup Gailly (jloup@gzip.org)
and Mark Adler (madler@alumni.caltech.edu).
.LP
This software is provided "as-is,"
diff --git a/zlib.h b/zlib.h
index 11d6902..a751b30 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,5 +1,5 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.2.3.5, Jan 8th, 2010
+ version 1.2.3.6, Jan 17th, 2010
Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler
@@ -37,44 +37,43 @@
extern "C" {
#endif
-#define ZLIB_VERSION "1.2.3.5"
-#define ZLIB_VERNUM 0x1235
+#define ZLIB_VERSION "1.2.3.6"
+#define ZLIB_VERNUM 0x1236
#define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2
#define ZLIB_VER_REVISION 3
/*
- The 'zlib' compression library provides in-memory compression and
- decompression functions, including integrity checks of the uncompressed
- data. This version of the library supports only one compression method
- (deflation) but other algorithms will be added later and will have the same
- stream interface.
+ The 'zlib' compression library provides in-memory compression and
+ decompression functions, including integrity checks of the uncompressed data.
+ This version of the library supports only one compression method (deflation)
+ but other algorithms will be added later and will have the same stream
+ interface.
- Compression can be done in a single step if the buffers are large
- enough (for example if an input file is mmap'ed), or can be done by
- repeated calls of the compression function. In the latter case, the
- application must provide more input and/or consume the output
+ Compression can be done in a single step if the buffers are large enough,
+ or can be done by repeated calls of the compression function. In the latter
+ case, the application must provide more input and/or consume the output
(providing more output space) before each call.
- The compressed data format used by default by the in-memory functions is
+ The compressed data format used by default by the in-memory functions is
the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
around a deflate stream, which is itself documented in RFC 1951.
- The library also supports reading and writing files in gzip (.gz) format
+ The library also supports reading and writing files in gzip (.gz) format
with an interface similar to that of stdio using the functions that start
with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
- This library can optionally read and write gzip streams in memory as well.
+ This library can optionally read and write gzip streams in memory as well.
- The zlib format was designed to be compact and fast for use in memory
+ The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single-
file compression on file systems, has a larger header than zlib to maintain
directory information, and uses a different, slower check method than zlib.
- The library does not install any signal handler. The decoder checks
- the consistency of the compressed data, so the library should never
- crash even in case of corrupted input.
+ The library does not install any signal handler. The decoder checks
+ the consistency of the compressed data, so the library should never crash
+ even in case of corrupted input.
*/
typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
@@ -129,35 +128,34 @@
typedef gz_header FAR *gz_headerp;
/*
- The application must update next_in and avail_in when avail_in has
- dropped to zero. It must update next_out and avail_out when avail_out
- has dropped to zero. The application must initialize zalloc, zfree and
- opaque before calling the init function. All other fields are set by the
- compression library and must not be updated by the application.
+ The application must update next_in and avail_in when avail_in has dropped
+ to zero. It must update next_out and avail_out when avail_out has dropped
+ to zero. The application must initialize zalloc, zfree and opaque before
+ calling the init function. All other fields are set by the compression
+ library and must not be updated by the application.
- The opaque value provided by the application will be passed as the first
- parameter for calls of zalloc and zfree. This can be useful for custom
- memory management. The compression library attaches no meaning to the
+ The opaque value provided by the application will be passed as the first
+ parameter for calls of zalloc and zfree. This can be useful for custom
+ memory management. The compression library attaches no meaning to the
opaque value.
- zalloc must return Z_NULL if there is not enough memory for the object.
+ zalloc must return Z_NULL if there is not enough memory for the object.
If zlib is used in a multi-threaded application, zalloc and zfree must be
thread safe.
- On 16-bit systems, the functions zalloc and zfree must be able to allocate
- exactly 65536 bytes, but will not be required to allocate more than this
- if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
- pointers returned by zalloc for objects of exactly 65536 bytes *must*
- have their offset normalized to zero. The default allocation function
- provided by this library ensures this (see zutil.c). To reduce memory
- requirements and avoid any allocation of 64K objects, at the expense of
- compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+ On 16-bit systems, the functions zalloc and zfree must be able to allocate
+ exactly 65536 bytes, but will not be required to allocate more than this if
+ the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers
+ returned by zalloc for objects of exactly 65536 bytes *must* have their
+ offset normalized to zero. The default allocation function provided by this
+ library ensures this (see zutil.c). To reduce memory requirements and avoid
+ any allocation of 64K objects, at the expense of compression ratio, compile
+ the library with -DMAX_WBITS=14 (see zconf.h).
- The fields total_in and total_out can be used for statistics or
- progress reports. After compression, total_in holds the total size of
- the uncompressed data and may be saved for use in the decompressor
- (particularly if the decompressor wants to decompress everything in
- a single step).
+ The fields total_in and total_out can be used for statistics or progress
+ reports. After compression, total_in holds the total size of the
+ uncompressed data and may be saved for use in the decompressor (particularly
+ if the decompressor wants to decompress everything in a single step).
*/
/* constants */
@@ -180,8 +178,8 @@
#define Z_MEM_ERROR (-4)
#define Z_BUF_ERROR (-5)
#define Z_VERSION_ERROR (-6)
-/* Return codes for the compression/decompression functions. Negative
- * values are errors, positive values are used for special but normal events.
+/* Return codes for the compression/decompression functions. Negative values
+ * are errors, positive values are used for special but normal events.
*/
#define Z_NO_COMPRESSION 0
@@ -215,63 +213,63 @@
ZEXTERN const char * ZEXPORT zlibVersion OF((void));
/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
- If the first character differs, the library code actually used is
- not compatible with the zlib.h header file used by the application.
- This check is automatically made by deflateInit and inflateInit.
+ If the first character differs, the library code actually used is not
+ compatible with the zlib.h header file used by the application. This check
+ is automatically made by deflateInit and inflateInit.
*/
/*
ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
- Initializes the internal stream state for compression. The fields
- zalloc, zfree and opaque must be initialized before by the caller.
- If zalloc and zfree are set to Z_NULL, deflateInit updates them to
- use default allocation functions.
+ Initializes the internal stream state for compression. The fields
+ zalloc, zfree and opaque must be initialized before by the caller. If
+ zalloc and zfree are set to Z_NULL, deflateInit updates them to use default
+ allocation functions.
The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
- 1 gives best speed, 9 gives best compression, 0 gives no compression at
- all (the input data is simply copied a block at a time).
- Z_DEFAULT_COMPRESSION requests a default compromise between speed and
- compression (currently equivalent to level 6).
+ 1 gives best speed, 9 gives best compression, 0 gives no compression at all
+ (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION
+ requests a default compromise between speed and compression (currently
+ equivalent to level 6).
deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_STREAM_ERROR if level is not a valid compression level,
Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
- with the version assumed by the caller (ZLIB_VERSION).
- msg is set to null if there is no error message. deflateInit does not
- perform any compression: this will be done by deflate().
+ with the version assumed by the caller (ZLIB_VERSION). msg is set to null
+ if there is no error message. deflateInit does not perform any compression:
+ this will be done by deflate().
*/
ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
/*
deflate compresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may introduce some
- output latency (reading input without producing any output) except when
+ buffer becomes empty or the output buffer becomes full. It may introduce
+ some output latency (reading input without producing any output) except when
forced to flush.
- The detailed semantics are as follows. deflate performs one or both of the
+ The detailed semantics are as follows. deflate performs one or both of the
following actions:
- Compress more input starting at next_in and update next_in and avail_in
- accordingly. If not all input can be processed (because there is not
+ accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in and avail_in are updated and
processing will resume at this point for the next call of deflate().
- Provide more output starting at next_out and update next_out and avail_out
- accordingly. This action is forced if the parameter flush is non zero.
+ accordingly. This action is forced if the parameter flush is non zero.
Forcing flush frequently degrades the compression ratio, so this parameter
- should be set only when necessary (in interactive applications).
- Some output may be provided even if flush is not set.
+ should be set only when necessary (in interactive applications). Some
+ output may be provided even if flush is not set.
- Before the call of deflate(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating avail_in or avail_out accordingly; avail_out
- should never be zero before the call. The application can consume the
- compressed output when it wants, for example when the output buffer is full
- (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
- and with zero avail_out, it must be called again after making room in the
- output buffer because there might be more output pending.
+ Before the call of deflate(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming more
+ output, and updating avail_in or avail_out accordingly; avail_out should
+ never be zero before the call. The application can consume the compressed
+ output when it wants, for example when the output buffer is full (avail_out
+ == 0), or after each call of deflate(). If deflate returns Z_OK and with
+ zero avail_out, it must be called again after making room in the output
+ buffer because there might be more output pending.
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumulate before producing output, in order to
@@ -279,12 +277,13 @@
If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
flushed to the output buffer and the output is aligned on a byte boundary, so
- that the decompressor can get all input data available so far. (In particular
- avail_in is zero after the call if enough output space has been provided
- before the call.) Flushing may degrade compression for some compression
- algorithms and so it should be used only when necessary. This completes the
- current deflate block and follows it with an empty stored block that is three
- bits plus filler bits to the next byte, followed by four bytes (00 00 ff ff).
+ that the decompressor can get all input data available so far. (In
+ particular avail_in is zero after the call if enough output space has been
+ provided before the call.) Flushing may degrade compression for some
+ compression algorithms and so it should be used only when necessary. This
+ completes the current deflate block and follows it with an empty stored block
+ that is three bits plus filler bits to the next byte, followed by four bytes
+ (00 00 ff ff).
If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the
output buffer, but the output is not aligned to a byte boundary. All of the
@@ -306,43 +305,43 @@
If flush is set to Z_FULL_FLUSH, all output is flushed as with
Z_SYNC_FLUSH, and the compression state is reset so that decompression can
restart from this point if previous compressed data has been damaged or if
- random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
+ random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
compression.
If deflate returns with avail_out == 0, this function must be called again
with the same value of the flush parameter and more output space (updated
avail_out), until the flush is complete (deflate returns with non-zero
- avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
+ avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
avail_out is greater than six to avoid repeated flush markers due to
avail_out == 0 on return.
If the parameter flush is set to Z_FINISH, pending input is processed,
- pending output is flushed and deflate returns with Z_STREAM_END if there
- was enough output space; if deflate returns with Z_OK, this function must be
+ pending output is flushed and deflate returns with Z_STREAM_END if there was
+ enough output space; if deflate returns with Z_OK, this function must be
called again with Z_FINISH and more output space (updated avail_out) but no
- more input data, until it returns with Z_STREAM_END or an error. After
- deflate has returned Z_STREAM_END, the only possible operations on the
- stream are deflateReset or deflateEnd.
+ more input data, until it returns with Z_STREAM_END or an error. After
+ deflate has returned Z_STREAM_END, the only possible operations on the stream
+ are deflateReset or deflateEnd.
Z_FINISH can be used immediately after deflateInit if all the compression
- is to be done in a single step. In this case, avail_out must be at least
- the value returned by deflateBound (see below). If deflate does not return
+ is to be done in a single step. In this case, avail_out must be at least the
+ value returned by deflateBound (see below). If deflate does not return
Z_STREAM_END, then it must be called again as described above.
deflate() sets strm->adler to the adler32 checksum of all input read
so far (that is, total_in bytes).
deflate() may update strm->data_type if it can make a good guess about
- the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
- binary. This field is only for information purposes and does not affect
- the compression algorithm in any manner.
+ the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
+ binary. This field is only for information purposes and does not affect the
+ compression algorithm in any manner.
deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible
- (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
+ (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
fatal, and deflate() can be called again with more input and more output
space to continue compressing.
*/
@@ -351,13 +350,13 @@
ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
/*
All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
+ This function discards any unprocessed input and does not flush any pending
+ output.
deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
stream state was inconsistent, Z_DATA_ERROR if the stream was freed
- prematurely (some input or output was discarded). In the error case,
- msg may be set but then points to a static string (which must not be
+ prematurely (some input or output was discarded). In the error case, msg
+ may be set but then points to a static string (which must not be
deallocated).
*/
@@ -365,10 +364,10 @@
/*
ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
- Initializes the internal stream state for decompression. The fields
+ Initializes the internal stream state for decompression. The fields
next_in, avail_in, zalloc, zfree and opaque must be initialized before by
- the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
- value depends on the compression method), inflateInit determines the
+ the caller. If next_in is not Z_NULL and avail_in is large enough (the
+ exact value depends on the compression method), inflateInit determines the
compression method from the zlib header and allocates all data structures
accordingly; otherwise the allocation will be deferred to the first call of
inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
@@ -378,66 +377,66 @@
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller, or Z_STREAM_ERROR if the parameters are
invalid, such as a null pointer to the structure. msg is set to null if
- there is no error message. inflateInit does not perform any decompression
+ there is no error message. inflateInit does not perform any decompression
apart from possibly reading the zlib header if present: actual decompression
will be done by inflate(). (So next_in and avail_in may be modified, but
- next_out and avail_out are unused and unchanged.) The current
- implementation of inflateInit() does not process any header information --
- that is deferred until inflate() is called.
+ next_out and avail_out are unused and unchanged.) The current implementation
+ of inflateInit() does not process any header information -- that is deferred
+ until inflate() is called.
*/
ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
/*
inflate decompresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may introduce
+ buffer becomes empty or the output buffer becomes full. It may introduce
some output latency (reading input without producing any output) except when
forced to flush.
- The detailed semantics are as follows. inflate performs one or both of the
+ The detailed semantics are as follows. inflate performs one or both of the
following actions:
- Decompress more input starting at next_in and update next_in and avail_in
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), next_in is updated and processing
- will resume at this point for the next call of inflate().
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), next_in is updated and processing will
+ resume at this point for the next call of inflate().
- Provide more output starting at next_out and update next_out and avail_out
- accordingly. inflate() provides as much output as possible, until there
- is no more input data or no more space in the output buffer (see below
- about the flush parameter).
+ accordingly. inflate() provides as much output as possible, until there is
+ no more input data or no more space in the output buffer (see below about
+ the flush parameter).
- Before the call of inflate(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating the next_* and avail_* values accordingly.
- The application can consume the uncompressed output when it wants, for
- example when the output buffer is full (avail_out == 0), or after each
- call of inflate(). If inflate returns Z_OK and with zero avail_out, it
- must be called again after making room in the output buffer because there
- might be more output pending.
+ Before the call of inflate(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming more
+ output, and updating the next_* and avail_* values accordingly. The
+ application can consume the uncompressed output when it wants, for example
+ when the output buffer is full (avail_out == 0), or after each call of
+ inflate(). If inflate returns Z_OK and with zero avail_out, it must be
+ called again after making room in the output buffer because there might be
+ more output pending.
The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH,
- Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much
- output as possible to the output buffer. Z_BLOCK requests that inflate() stop
- if and when it gets to the next deflate block boundary. When decoding the
- zlib or gzip format, this will cause inflate() to return immediately after
- the header and before the first block. When doing a raw inflate, inflate()
- will go ahead and process the first block, and will return when it gets to
- the end of that block, or when it runs out of data.
+ Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much
+ output as possible to the output buffer. Z_BLOCK requests that inflate()
+ stop if and when it gets to the next deflate block boundary. When decoding
+ the zlib or gzip format, this will cause inflate() to return immediately
+ after the header and before the first block. When doing a raw inflate,
+ inflate() will go ahead and process the first block, and will return when it
+ gets to the end of that block, or when it runs out of data.
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 64
- if inflate() is currently decoding the last block in the deflate stream,
- 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. 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. data_type is set as noted here every time inflate()
- returns for all flush options, and so can be used to determine the amount
- of currently consumed input in bits.
+ 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
+ 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. 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. data_type is set as noted here every time inflate() returns for all
+ flush options, and so can be used to determine the amount of currently
+ consumed input in bits.
The Z_TREES option behaves as Z_BLOCK does, but it also returns when the
end of each deflate block header is reached, before any actual data in that
@@ -447,19 +446,19 @@
immediately after reaching the end of the deflate block header.
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
- (a single call of inflate), the parameter flush should be set to
- Z_FINISH. In this case all pending input is processed and all pending
- output is flushed; avail_out must be large enough to hold all the
- uncompressed data. (The size of the uncompressed data may have been saved
- by the compressor for this purpose.) The next operation on this stream must
- be inflateEnd to deallocate the decompression state. The use of Z_FINISH
- is never required, but can be used to inform inflate that a faster approach
- may be used for the single inflate() call.
+ error. However if all decompression is to be performed in a single step (a
+ single call of inflate), the parameter flush should be set to Z_FINISH. In
+ this case all pending input is processed and all pending output is flushed;
+ avail_out must be large enough to hold all the uncompressed data. (The size
+ of the uncompressed data may have been saved by the compressor for this
+ purpose.) The next operation on this stream must be inflateEnd to deallocate
+ the decompression state. The use of Z_FINISH is never required, but can be
+ used to inform inflate that a faster approach may be used for the single
+ inflate() call.
In this implementation, inflate() always flushes as much output as
possible to the output buffer, and always uses the faster approach on the
- first call. So the only effect of the flush parameter in this implementation
+ first call. So the only effect of the flush parameter in this implementation
is on the return value of inflate(), as noted below, or when it returns early
because Z_BLOCK or Z_TREES is used.
@@ -468,7 +467,7 @@
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the adler32 checksum of all output produced so far (that is,
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
- below. At the end of the stream, inflate() checks that its computed adler32
+ below. At the end of the stream, inflate() checks that its computed adler32
checksum is equal to that saved by the compressor and returns Z_STREAM_END
only if the checksum is correct.
@@ -487,22 +486,22 @@
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory,
Z_BUF_ERROR if no progress is possible or if there was not enough room in the
- output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
+ output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
inflate() can be called again with more input and more output space to
- continue decompressing. If Z_DATA_ERROR is returned, the application may then
- call inflateSync() to look for a good compression block if a partial recovery
- of the data is desired.
+ continue decompressing. If Z_DATA_ERROR is returned, the application may
+ then call inflateSync() to look for a good compression block if a partial
+ recovery of the data is desired.
*/
ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
/*
All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
+ This function discards any unprocessed input and does not flush any pending
+ output.
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
- was inconsistent. In the error case, msg may be set but then points to a
+ was inconsistent. In the error case, msg may be set but then points to a
static string (which must not be deallocated).
*/
@@ -520,55 +519,55 @@
int memLevel,
int strategy));
- This is another version of deflateInit with more compression options. The
- fields next_in, zalloc, zfree and opaque must be initialized before by
- the caller.
+ This is another version of deflateInit with more compression options. The
+ fields next_in, zalloc, zfree and opaque must be initialized before by the
+ caller.
- The method parameter is the compression method. It must be Z_DEFLATED in
+ The method parameter is the compression method. It must be Z_DEFLATED in
this version of the library.
The windowBits parameter is the base two logarithm of the window size
- (the size of the history buffer). It should be in the range 8..15 for this
- version of the library. Larger values of this parameter result in better
- compression at the expense of memory usage. The default value is 15 if
+ (the size of the history buffer). It should be in the range 8..15 for this
+ version of the library. Larger values of this parameter result in better
+ compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead.
- windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
- determines the window size. deflate() will then generate raw deflate data
+ windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
+ determines the window size. deflate() will then generate raw deflate data
with no zlib header or trailer, and will not compute an adler32 check value.
- windowBits can also be greater than 15 for optional gzip encoding. Add
+ windowBits can also be greater than 15 for optional gzip encoding. Add
16 to windowBits to write a simple gzip header and trailer around the
- compressed data instead of a zlib wrapper. The gzip header will have no
- file name, no extra data, no comment, no modification time (set to zero),
- no header crc, and the operating system will be set to 255 (unknown). If a
+ compressed data instead of a zlib wrapper. The gzip header will have no
+ file name, no extra data, no comment, no modification time (set to zero), no
+ header crc, and the operating system will be set to 255 (unknown). If a
gzip stream is being written, strm->adler is a crc32 instead of an adler32.
The memLevel parameter specifies how much memory should be allocated
- for the internal compression state. memLevel=1 uses minimum memory but
- is slow and reduces compression ratio; memLevel=9 uses maximum memory
- for optimal speed. The default value is 8. See zconf.h for total memory
- usage as a function of windowBits and memLevel.
+ for the internal compression state. memLevel=1 uses minimum memory but is
+ slow and reduces compression ratio; memLevel=9 uses maximum memory for
+ optimal speed. The default value is 8. See zconf.h for total memory usage
+ as a function of windowBits and memLevel.
- The strategy parameter is used to tune the compression algorithm. Use the
+ The strategy parameter is used to tune the compression algorithm. Use the
value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
string match), or Z_RLE to limit match distances to one (run-length
- encoding). Filtered data consists mostly of small values with a somewhat
- random distribution. In this case, the compression algorithm is tuned to
- compress them better. The effect of Z_FILTERED is to force more Huffman
+ encoding). Filtered data consists mostly of small values with a somewhat
+ random distribution. In this case, the compression algorithm is tuned to
+ compress them better. The effect of Z_FILTERED is to force more Huffman
coding and less string matching; it is somewhat intermediate between
- Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as
- fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The
+ Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as
+ fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The
strategy parameter only affects the compression ratio but not the
correctness of the compressed output even if it is not set appropriately.
Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler
decoder for special applications.
- deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
- method). msg is set to null if there is no error message. deflateInit2 does
- not perform any compression: this will be done by deflate().
+ method). msg is set to null if there is no error message. deflateInit2
+ does not perform any compression: this will be done by deflate().
*/
ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
@@ -576,14 +575,14 @@
uInt dictLength));
/*
Initializes the compression dictionary from the given byte sequence
- without producing any compressed output. This function must be called
- immediately after deflateInit, deflateInit2 or deflateReset, before any
- call of deflate. The compressor and decompressor must use exactly the same
+ without producing any compressed output. This function must be called
+ immediately after deflateInit, deflateInit2 or deflateReset, before any call
+ of deflate. The compressor and decompressor must use exactly the same
dictionary (see inflateSetDictionary).
The dictionary should consist of strings (byte sequences) that are likely
to be encountered later in the data to be compressed, with the most commonly
- used strings preferably put towards the end of the dictionary. Using a
+ used strings preferably put towards the end of the dictionary. Using a
dictionary is most useful when the data to be compressed is short and can be
predicted with good accuracy; the data can then be compressed better than
with the default empty dictionary.
@@ -591,22 +590,22 @@
Depending on the size of the compression data structures selected by
deflateInit or deflateInit2, a part of the dictionary may in effect be
discarded, for example if the dictionary is larger than the window size
- provided in deflateInit or deflateInit2. Thus the strings most likely to be
- useful should be put at the end of the dictionary, not at the front. In
+ provided in deflateInit or deflateInit2. Thus the strings most likely to be
+ useful should be put at the end of the dictionary, not at the front. In
addition, the current implementation of deflate will use at most the window
size minus 262 bytes of the provided dictionary.
Upon return of this function, strm->adler is set to the adler32 value
of the dictionary; the decompressor may later use this value to determine
- which dictionary has been used by the compressor. (The adler32 value
+ which dictionary has been used by the compressor. (The adler32 value
applies to the whole dictionary even if only a subset of the dictionary is
actually used by the compressor.) If a raw deflate was requested, then the
adler32 value is not computed and strm->adler is not set.
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
- parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
+ parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent (for example if deflate has already been called for this stream
- or if the compression method is bsort). deflateSetDictionary does not
+ or if the compression method is bsort). deflateSetDictionary does not
perform any compression: this will be done by deflate().
*/
@@ -617,25 +616,25 @@
This function can be useful when several compression strategies will be
tried, for example when there are several ways of pre-processing the input
- data with a filter. The streams that will be discarded should then be freed
+ data with a filter. The streams that will be discarded should then be freed
by calling deflateEnd. Note that deflateCopy duplicates the internal
- compression state which can be quite large, so this strategy is slow and
- can consume lots of memory.
+ compression state which can be quite large, so this strategy is slow and can
+ consume lots of memory.
deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
- (such as zalloc being Z_NULL). msg is left unchanged in both source and
+ (such as zalloc being Z_NULL). msg is left unchanged in both source and
destination.
*/
ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
/*
This function is equivalent to deflateEnd followed by deflateInit,
- but does not free and reallocate all the internal compression state.
- The stream will keep the same compression level and any other attributes
- that may have been set by deflateInit2.
+ but does not free and reallocate all the internal compression state. The
+ stream will keep the same compression level and any other attributes that
+ may have been set by deflateInit2.
- deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+ deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL).
*/
@@ -646,18 +645,18 @@
Dynamically update the compression level and compression strategy. The
interpretation of level and strategy is as in deflateInit2. This can be
used to switch between compression and straight copy of the input data, or
- to switch to a different kind of input data requiring a different
- strategy. If the compression level is changed, the input available so far
- is compressed with the old level (and may be flushed); the new level will
- take effect only at the next call of deflate().
+ to switch to a different kind of input data requiring a different strategy.
+ If the compression level is changed, the input available so far is
+ compressed with the old level (and may be flushed); the new level will take
+ effect only at the next call of deflate().
Before the call of deflateParams, the stream state must be set as for
- a call of deflate(), since the currently available input may have to
- be compressed and flushed. In particular, strm->avail_out must be non-zero.
+ a call of deflate(), since the currently available input may have to be
+ compressed and flushed. In particular, strm->avail_out must be non-zero.
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
- stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
- if strm->avail_out was zero.
+ stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if
+ strm->avail_out was zero.
*/
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
@@ -692,21 +691,21 @@
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.
+ 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
+ deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
gz_headerp head));
/*
- deflateSetHeader() provides gzip header information for when a gzip
+ deflateSetHeader() provides gzip header information for when a gzip
stream is requested by deflateInit2(). deflateSetHeader() may be called
after deflateInit2() or deflateReset() and before the first call of
deflate(). The text, time, os, extra field, name, and comment information
@@ -719,11 +718,11 @@
1.3.x) do not support header crc's, and will report that it is a "multi-part
gzip file" and give up.
- If deflateSetHeader is not used, the default gzip header has text false,
+ If deflateSetHeader is not used, the default gzip header has text false,
the time set to zero, and os set to 255, with no extra, name, or comment
fields. The gzip header is returned to the default state by deflateReset().
- deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+ deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
@@ -731,50 +730,50 @@
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
int windowBits));
- This is another version of inflateInit with an extra parameter. The
+ This is another version of inflateInit with an extra parameter. The
fields next_in, avail_in, zalloc, zfree and opaque must be initialized
before by the caller.
The windowBits parameter is the base two logarithm of the maximum window
size (the size of the history buffer). It should be in the range 8..15 for
- this version of the library. The default value is 15 if inflateInit is used
- instead. windowBits must be greater than or equal to the windowBits value
+ this version of the library. The default value is 15 if inflateInit is used
+ instead. windowBits must be greater than or equal to the windowBits value
provided to deflateInit2() while compressing, or it must be equal to 15 if
- deflateInit2() was not used. If a compressed stream with a larger window
+ deflateInit2() was not used. If a compressed stream with a larger window
size is given as input, inflate() will return with the error code
Z_DATA_ERROR instead of trying to allocate a larger window.
windowBits can also be zero to request that inflate use the window size in
the zlib header of the compressed stream.
- windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
- determines the window size. inflate() will then process raw deflate data,
+ windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
+ determines the window size. inflate() will then process raw deflate data,
not looking for a zlib or gzip header, not generating a check value, and not
- looking for any check values for comparison at the end of the stream. This
+ looking for any check values for comparison at the end of the stream. This
is for use with other formats that use the deflate compressed data format
- such as zip. Those formats provide their own check values. If a custom
+ such as zip. Those formats provide their own check values. If a custom
format is developed using the raw deflate format for compressed data, it is
recommended that a check value such as an adler32 or a crc32 be applied to
the uncompressed data as is done in the zlib, gzip, and zip formats. For
- most applications, the zlib format should be used as is. Note that comments
+ most applications, the zlib format should be used as is. Note that comments
above on the use in deflateInit2() applies to the magnitude of windowBits.
- windowBits can also be greater than 15 for optional gzip decoding. Add
+ windowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will
- return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is
- a crc32 instead of an adler32.
+ return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a
+ crc32 instead of an adler32.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller, or Z_STREAM_ERROR if the parameters are
invalid, such as a null pointer to the structure. msg is set to null if
- there is no error message. inflateInit2 does not perform any decompression
+ there is no error message. inflateInit2 does not perform any decompression
apart from possibly reading the zlib header if present: actual decompression
will be done by inflate(). (So next_in and avail_in may be modified, but
- next_out and avail_out are unused and unchanged.) The current
- implementation of inflateInit2() does not process any header information --
- that is deferred until inflate() is called.
+ next_out and avail_out are unused and unchanged.) The current implementation
+ of inflateInit2() does not process any header information -- that is
+ deferred until inflate() is called.
*/
ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
@@ -782,8 +781,8 @@
uInt dictLength));
/*
Initializes the decompression dictionary from the given uncompressed byte
- sequence. This function must be called immediately after a call of inflate,
- if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
+ sequence. This function must be called immediately after a call of inflate,
+ if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called
@@ -792,26 +791,26 @@
dictionary that was used for compression is provided.
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
- parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
+ parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
- expected one (incorrect adler32 value). inflateSetDictionary does not
+ expected one (incorrect adler32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of
inflate().
*/
ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
/*
- Skips invalid compressed data until a full flush point (see above the
- description of deflate with Z_FULL_FLUSH) can be found, or until all
- available input is skipped. No output is provided.
+ Skips invalid compressed data until a full flush point (see above the
+ description of deflate with Z_FULL_FLUSH) can be found, or until all
+ available input is skipped. No output is provided.
- inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
- if no more input was provided, Z_DATA_ERROR if no flush point has been found,
- or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
- case, the application may save the current current value of total_in which
- indicates where valid compressed data was found. In the error case, the
- application may repeatedly call inflateSync, providing more input each time,
- until success or end of the input data.
+ inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
+ if no more input was provided, Z_DATA_ERROR if no flush point has been
+ found, or Z_STREAM_ERROR if the stream structure was inconsistent. In the
+ success case, the application may save the current current value of total_in
+ which indicates where valid compressed data was found. In the error case,
+ the application may repeatedly call inflateSync, providing more input each
+ time, until success or end of the input data.
*/
ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
@@ -826,17 +825,17 @@
inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
- (such as zalloc being Z_NULL). msg is left unchanged in both source and
+ (such as zalloc being Z_NULL). msg is left unchanged in both source and
destination.
*/
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/*
This function is equivalent to inflateEnd followed by inflateInit,
- but does not free and reallocate all the internal decompression state.
- The stream will keep attributes that may have been set by inflateInit2.
+ but does not free and reallocate all the internal decompression state. The
+ stream will keep attributes that may have been set by inflateInit2.
- inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+ inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL).
*/
@@ -844,10 +843,10 @@
int windowBits));
/*
This function is the same as inflateReset, but it also permits changing
- the wrap and window size requests. The windowBits parameter is
- interpreted the same as it is for inflateInit2.
+ the wrap and window size requests. The windowBits parameter is interpreted
+ the same as it is for inflateInit2.
- inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source
+ inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL), or if
the windowBits parameter is invalid.
*/
@@ -857,19 +856,19 @@
int value));
/*
This function inserts bits in the inflate input stream. The intent is
- that this function is used to start inflating at a bit position in the
- middle of a byte. The provided bits will be used before any bytes are used
- from next_in. This function should only be used with raw inflate, and
- should be used before the first inflate() call after inflateInit2() or
- inflateReset(). bits must be less than or equal to 16, and that many of the
- least significant bits of value will be inserted in the input.
+ that this function is used to start inflating at a bit position in the
+ middle of a byte. The provided bits will be used before any bytes are used
+ from next_in. This function should only be used with raw inflate, and
+ should be used before the first inflate() call after inflateInit2() or
+ inflateReset(). bits must be less than or equal to 16, and that many of the
+ least significant bits of value will be inserted in the input.
If bits is negative, then the input stream bit buffer is emptied. Then
- inflatePrime() can be called again to put bits in the buffer. This is used
- to clear out bits leftover after feeding inflate a block description prior
- to feeding inflate codes.
+ inflatePrime() can be called again to put bits in the buffer. This is used
+ to clear out bits leftover after feeding inflate a block description prior
+ to feeding inflate codes.
- inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+ inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
@@ -891,20 +890,20 @@
decoding of the code, or if it has completed decoding but is waiting for
more output space to write the literal or match data.
- inflateMark() is used to mark locations in the input data for random
+ inflateMark() is used to mark locations in the input data for random
access, which may be at bit positions, and to note those cases where the
output of a code may span boundaries of random access blocks. The current
location in the input stream can be determined from avail_in and data_type
as noted in the description for the Z_BLOCK flush parameter for inflate.
- inflateMark returns the value noted above or -1 << 16 if the provided
+ inflateMark returns the value noted above or -1 << 16 if the provided
source stream state was inconsistent.
*/
ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
gz_headerp head));
/*
- inflateGetHeader() requests that gzip header information be stored in the
+ inflateGetHeader() requests that gzip header information be stored in the
provided gz_header structure. inflateGetHeader() may be called after
inflateInit2() or inflateReset(), and before the first call of inflate().
As inflate() processes the gzip stream, head->done is zero until the header
@@ -914,30 +913,30 @@
used to force inflate() to return immediately after header processing is
complete and before any actual data is decompressed.
- The text, time, xflags, and os fields are filled in with the gzip header
+ The text, time, xflags, and os fields are filled in with the gzip header
contents. hcrc is set to true if there is a header CRC. (The header CRC
- was valid if done is set to one.) If extra is not Z_NULL, then extra_max
+ was valid if done is set to one.) If extra is not Z_NULL, then extra_max
contains the maximum number of bytes to write to extra. Once done is true,
extra_len contains the actual extra field length, and extra contains the
extra field, or that field truncated if extra_max is less than extra_len.
If name is not Z_NULL, then up to name_max characters are written there,
terminated with a zero unless the length is greater than name_max. If
comment is not Z_NULL, then up to comm_max characters are written there,
- terminated with a zero unless the length is greater than comm_max. When
- any of extra, name, or comment are not Z_NULL and the respective field is
- not present in the header, then that field is set to Z_NULL to signal its
+ terminated with a zero unless the length is greater than comm_max. When any
+ of extra, name, or comment are not Z_NULL and the respective field is not
+ present in the header, then that field is set to Z_NULL to signal its
absence. This allows the use of deflateSetHeader() with the returned
structure to duplicate the header. However if those fields are set to
allocated memory, then the application will need to save those pointers
elsewhere so that they can be eventually freed.
- If inflateGetHeader is not used, then the header information is simply
+ If inflateGetHeader is not used, then the header information is simply
discarded. The header is always checked for validity, including the header
CRC if present. inflateReset() will reset the process to discard the header
information. The application would need to call inflateGetHeader() again to
retrieve the header from the next gzip stream.
- inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+ inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
@@ -958,9 +957,9 @@
See inflateBack() for the usage of these routines.
inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
- the paramaters are invalid, Z_MEM_ERROR if the internal state could not
- be allocated, or Z_VERSION_ERROR if the version of the library does not
- match the version of the header file.
+ the paramaters are invalid, Z_MEM_ERROR if the internal state could not be
+ allocated, or Z_VERSION_ERROR if the version of the library does not match
+ the version of the header file.
*/
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
@@ -980,15 +979,15 @@
inflateBackInit() must be called first to allocate the internal state
and to initialize the state with the user-provided window buffer.
inflateBack() may then be used multiple times to inflate a complete, raw
- deflate stream with each call. inflateBackEnd() is then called to free
- the allocated state.
+ deflate stream with each call. inflateBackEnd() is then called to free the
+ allocated state.
A raw deflate stream is one with no zlib or gzip header or trailer.
This routine would normally be used in a utility that reads zip or gzip
files and writes out uncompressed files. The utility would decode the
- header and process the trailer on its own, hence this routine expects
- only the raw deflate stream to decompress. This is different from the
- normal behavior of inflate(), which expects either a zlib or gzip header and
+ header and process the trailer on its own, hence this routine expects only
+ the raw deflate stream to decompress. This is different from the normal
+ behavior of inflate(), which expects either a zlib or gzip header and
trailer around the deflate stream.
inflateBack() uses two subroutines supplied by the caller that are then
@@ -1014,7 +1013,7 @@
calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
must also be initialized, and then if strm->avail_in is not zero, input will
- initially be taken from strm->next_in[0 .. strm->avail_in - 1].
+ initially be taken from strm->next_in[0 .. strm->avail_in - 1].
The in_desc and out_desc parameters of inflateBack() is passed as the
first parameter of in() and out() respectively when they are called. These
@@ -1024,15 +1023,15 @@
On return, inflateBack() will set strm->next_in and strm->avail_in to
pass back any unused input that was provided by the last in() call. The
return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
- if in() or out() returned an error, Z_DATA_ERROR if there was a format
- error in the deflate stream (in which case strm->msg is set to indicate the
- nature of the error), or Z_STREAM_ERROR if the stream was not properly
- initialized. In the case of Z_BUF_ERROR, an input or output error can be
- distinguished using strm->next_in which will be Z_NULL only if in() returned
- an error. If strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to
- out() returning non-zero. (in() will always be called before out(), so
- strm->next_in is assured to be defined if out() returns non-zero.) Note
- that inflateBack() cannot return Z_OK.
+ if in() or out() returned an error, Z_DATA_ERROR if there was a format error
+ in the deflate stream (in which case strm->msg is set to indicate the nature
+ of the error), or Z_STREAM_ERROR if the stream was not properly initialized.
+ In the case of Z_BUF_ERROR, an input or output error can be distinguished
+ using strm->next_in which will be Z_NULL only if in() returned an error. If
+ strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning
+ non-zero. (in() will always be called before out(), so strm->next_in is
+ assured to be defined if out() returns non-zero.) Note that inflateBack()
+ cannot return Z_OK.
*/
ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
@@ -1089,22 +1088,21 @@
/*
The following utility functions are implemented on top of the
- basic stream-oriented functions. To simplify the interface, some
- default options are assumed (compression level and memory usage,
- standard memory allocation functions). The source code of these
- utility functions can easily be modified if you need special options.
+ basic stream-oriented functions. To simplify the interface, some default
+ options are assumed (compression level and memory usage, standard memory
+ allocation functions). The source code of these utility functions can
+ easily be modified if you need special options.
*/
ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen));
/*
Compresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be at least the value returned
- by compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ the byte length of the source buffer. Upon entry, destLen is the total size
+ of the destination buffer, which must be at least the value returned by
+ compressBound(sourceLen). 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.
@@ -1114,11 +1112,11 @@
const Bytef *source, uLong sourceLen,
int level));
/*
- Compresses the source buffer into the destination buffer. The level
+ 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
+ length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least the value returned by
- compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ compressBound(sourceLen). 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
@@ -1129,22 +1127,20 @@
ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
/*
compressBound() returns an upper bound on the compressed size after
- compress() or compress2() on sourceLen bytes. It would be used before
- a compress() or compress2() call to allocate the destination buffer.
+ compress() or compress2() on sourceLen bytes. It would be used before a
+ compress() or compress2() call to allocate the destination buffer.
*/
ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen));
/*
Decompresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be large enough to hold the
- entire uncompressed data. (The size of the uncompressed data must have
- been saved previously by the compressor and transmitted to the decompressor
- by some mechanism outside the scope of this compression library.)
- Upon exit, destLen is the actual size of the uncompressed buffer.
- This function can be used to decompress a whole file at once if the
- input file is mmap'ed.
+ the byte length of the source buffer. Upon entry, destLen is the total size
+ of the destination buffer, which must be large enough to hold the entire
+ uncompressed data. (The size of the uncompressed data must have been saved
+ previously by the compressor and transmitted to the decompressor by some
+ mechanism outside the scope of this compression library.) Upon exit, destLen
+ is the actual size of the uncompressed buffer.
uncompress 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
@@ -1153,10 +1149,9 @@
/*
This library supports reading and writing files in gzip (.gz) format
- with an interface similar to that of stdio using the functions that start
- with "gz". The gzip format is different from the zlib format. gzip is a
- gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
-
+ with an interface similar to that of stdio using the functions that start
+ with "gz". The gzip format is different from the zlib format. gzip is a
+ gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
*/
typedef voidp gzFile;
@@ -1164,148 +1159,174 @@
/*
ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
- Opens a gzip (.gz) file for reading or writing. The mode parameter
- is as in fopen ("rb" or "wb") but can also include a compression level
- ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
- Huffman only compression as in "wb1h", or 'R' for run-length encoding
- as in "wb1R". (See the description of deflateInit2 for more information
- about the strategy parameter.)
+ Opens a gzip (.gz) file for reading or writing. The mode parameter is as
+ in fopen ("rb" or "wb") but can also include a compression level ("wb9") or
+ a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only
+ compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F'
+ for fixed code compression as in "wb9F". (See the description of
+ deflateInit2 for more information about the strategy parameter.) Also "a"
+ can be used instead of "w" to request that the gzip stream that will be
+ written be appended to the file. "+" will result in an error, since reading
+ and writing to the same gzip file is not supported.
gzopen can be used to read a file which is not in gzip format; in this
case gzread will directly read from the file without decompression.
gzopen returns NULL if the file could not be opened or if there was
- insufficient memory to allocate the (de)compression state; errno
- can be checked to distinguish the two cases (if errno is zero, the
- zlib error is Z_MEM_ERROR). */
+ insufficient memory to allocate the (de)compression state; errno can be
+ checked to distinguish the two cases (if errno is zero, the zlib error is
+ Z_MEM_ERROR).
+*/
ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
/*
gzdopen() associates a gzFile with the file descriptor fd. File
- descriptors are obtained from calls like open, dup, creat, pipe or
- fileno (in the file has been previously opened with fopen).
- The mode parameter is as in gzopen.
- The next call of gzclose on the returned gzFile will also close the
- file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
- descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
- gzdopen returns NULL if there was insufficient memory to allocate
- the (de)compression state.
+ descriptors are obtained from calls like open, dup, creat, pipe or fileno
+ (in the file has been previously opened with fopen). The mode parameter is
+ as in gzopen.
+
+ The next call of gzclose on the returned gzFile will also close the file
+ descriptor fd, just like fclose(fdopen(fd), mode) closes the file descriptor
+ fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
+
+ gzdopen returns NULL if there was insufficient memory to allocate the
+ (de)compression state.
*/
ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
/*
- Set the internal buffer size used by this library's functions. The default
- buffer size is 8192 bytes. This function must be called after gz_open() or
- gz_dopen(), and before any other calls that read or write the file. The
- buffer memory allocation is always deferred to the first read or write. Two
- buffers are allocated, either both of the specified size when writing, or
- one of the specified size and the other twice that size when reading. A
- larger buffer size of, for example, 64K or 128K bytes will noticeably
- increase the speed of decompression (reading).
- gz_buffer() returns 0 on success, or -1 on failure, such as being called
+ Set the internal buffer size used by this library's functions. The
+ default buffer size is 8192 bytes. This function must be called after
+ gzopen() or gzdopen(), and before any other calls that read or write the
+ file. The buffer memory allocation is always deferred to the first read or
+ write. Two buffers are allocated, either both of the specified size when
+ writing, or one of the specified size and the other twice that size when
+ reading. A larger buffer size of, for example, 64K or 128K bytes will
+ noticeably increase the speed of decompression (reading).
+
+ The new buffer size also affects the maximum length for gzprintf().
+
+ gzbuffer() returns 0 on success, or -1 on failure, such as being called
too late.
*/
ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
/*
- Dynamically update the compression level or strategy. See the description
+ Dynamically update the compression level or strategy. See the description
of deflateInit2 for the meaning of these parameters.
+
gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
opened for writing.
*/
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
/*
- Reads the given number of uncompressed bytes from the compressed file.
- If the input file was not in gzip format, gzread copies the given number
- of bytes into the buffer.
- gzread returns the number of uncompressed bytes actually read (0 for
- end of file, -1 for error). */
+ Reads the given number of uncompressed bytes from the compressed file. If
+ the input file was not in gzip format, gzread copies the given number of
+ bytes into the buffer.
+
+ After reaching the end of a gzip stream in the input, gzread will continue
+ to read, looking for another gzip stream, or failing that, reading the rest
+ of the input file directly without decompression. The entire input file
+ will be read if gzread is called until it returns less than the requested
+ len.
+
+ gzread returns the number of uncompressed bytes actually read (less than
+ len for end of file, -1 for error).
+*/
ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
voidpc buf, unsigned len));
/*
Writes the given number of uncompressed bytes into the compressed file.
- gzwrite returns the number of uncompressed bytes actually written
- (0 in case of error).
+ gzwrite returns the number of uncompressed bytes actually written (0 in case
+ of error).
*/
ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
/*
Converts, formats, and writes the arguments to the compressed file under
- control of the format string, as in fprintf. gzprintf returns the number of
- uncompressed bytes actually written, or 0 in case of error. The number of
+ control of the format string, as in fprintf. gzprintf returns the number of
+ uncompressed bytes actually written, or 0 in case of error. The number of
uncompressed bytes written is limited to 8191, or one less than the buffer
- size given to gz_buffer(). The caller should assure that this limit is not
- exceeded. If it is exceeded, then gzprintf() will return an error (0) with
- nothing written. In this case, there may also be a buffer overflow with
- unpredictable consequences, which is possible only if zlib was compiled
- with the insecure functions sprintf() or vsprintf() because the secure
- snprintf() or vsnprintf() functions were not available.
+ size given to gzbuffer(). The caller should assure that this limit is not
+ exceeded. If it is exceeded, then gzprintf() will return an error (0) with
+ nothing written. In this case, there may also be a buffer overflow with
+ unpredictable consequences, which is possible only if zlib was compiled with
+ the insecure functions sprintf() or vsprintf() because the secure snprintf()
+ or vsnprintf() functions were not available. This can be checked for using
+ zlibCompileFlags().
*/
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
/*
- Writes the given null-terminated string to the compressed file, excluding
+ Writes the given null-terminated string to the compressed file, excluding
the terminating null character.
- gzputs returns the number of characters written, or -1 in case of error.
+
+ gzputs returns the number of characters written, or -1 in case of error.
*/
ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
/*
- Reads bytes from the compressed file until len-1 characters are read, or
+ Reads bytes from the compressed file until len-1 characters are read, or
a newline character is read and transferred to buf, or an end-of-file
condition is encountered. The string is then terminated with a null
character.
- gzgets returns buf, or Z_NULL in case of error.
+
+ gzgets returns buf, or Z_NULL in case of error.
*/
-ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
+ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
/*
- Writes c, converted to an unsigned char, into the compressed file.
- gzputc returns the value that was written, or -1 in case of error.
+ Writes c, converted to an unsigned char, into the compressed file. gzputc
+ returns the value that was written, or -1 in case of error.
*/
-ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
+ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
/*
- Reads one byte from the compressed file. gzgetc returns this byte
- or -1 in case of end of file or error.
+ Reads one byte from the compressed file. gzgetc returns this byte or -1
+ in case of end of file or error.
*/
-ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
+ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
/*
- Push one character back onto the stream to be read again later.
- Only one character of push-back is allowed. gzungetc() returns the
- character pushed, or -1 on failure. gzungetc() will fail if a
- character has been pushed but not read yet, or if c is -1. The pushed
- character will be discarded if the stream is repositioned with gzseek()
- or gzrewind().
+ Push one character back onto the stream to be read again later. At least
+ one character of push-back is allowed. gzungetc() returns the character
+ pushed, or -1 on failure. gzungetc() will fail if c is -1, and may fail if
+ a character has been pushed but not read yet. The pushed character will be
+ discarded if the stream is repositioned with gzseek() or gzrewind().
*/
ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
/*
- Flushes all pending output into the compressed file. The parameter
- flush is as in the deflate() function. The return value is the zlib
- error number (see function gzerror below). gzflush returns Z_OK if
- the flush parameter is Z_FINISH and all output could be flushed.
- gzflush should be called only when strictly necessary because it can
- degrade compression.
+ Flushes all pending output into the compressed file. The parameter flush
+ is as in the deflate() function. The return value is the zlib error number
+ (see function gzerror below).
+
+ If the flush parameter is Z_FINISH, the remaining data is written and the
+ gzip stream is completed in the output. If gzwrite() is called again, a new
+ gzip stream will be started in the output. gzread() is able to read such
+ concatented gzip streams.
+
+ gzflush should be called only when strictly necessary because it will
+ degrade compression if called too often.
*/
/*
ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
z_off_t offset, int whence));
- Sets the starting position for the next gzread or gzwrite on the
- given compressed file. The offset represents a number of bytes in the
- uncompressed data stream. The whence parameter is defined as in lseek(2);
+ Sets the starting position for the next gzread or gzwrite on the given
+ compressed file. The offset represents a number of bytes in the
+ uncompressed data stream. The whence parameter is defined as in lseek(2);
the value SEEK_END is not supported.
+
If the file is opened for reading, this function is emulated but can be
- extremely slow. If the file is opened for writing, only forward seeks are
+ extremely slow. If the file is opened for writing, only forward seeks are
supported; gzseek then compresses a sequence of zeroes up to the new
starting position.
- gzseek returns the resulting offset location as measured in bytes from
+ gzseek returns the resulting offset location as measured in bytes from
the beginning of the uncompressed stream, or -1 in case of error, in
particular if the file is opened for writing and the new starting position
would be before the current position.
@@ -1315,47 +1336,50 @@
/*
Rewinds the given file. This function is supported only for reading.
- gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
+ gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
*/
/*
ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
- Returns the starting position for the next gzread or gzwrite on the
- given compressed file. This position represents a number of bytes in the
- uncompressed data stream, and is zero when starting, even if appending
- or reading a gzip stream from the middle of a file using gz_dopen().
+ Returns the starting position for the next gzread or gzwrite on the given
+ compressed file. This position represents a number of bytes in the
+ uncompressed data stream, and is zero when starting, even if appending or
+ reading a gzip stream from the middle of a file using gzdopen().
- gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
+ gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
*/
/*
ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file));
- Returns the current offset in the file being read or written. This offset
+ Returns the current offset in the file being read or written. This offset
includes the count of bytes that precede the gzip stream, for example when
- appending or when using gz_dopen() for reading. When reading, the offset
+ appending or when using gzdopen() for reading. When reading, the offset
includes data that has been used to generate what has been provided as
uncompressed data so far, but does not include as yet unused buffered input.
- On error, gz_offset() returns -1.
+ On error, gzoffset() returns -1.
*/
ZEXTERN int ZEXPORT gzeof OF((gzFile file));
/*
- Returns 1 when EOF has previously been detected reading the given
- input stream, otherwise zero.
+ Returns 1 when EOF has previously been detected reading the given input
+ stream, otherwise zero.
*/
ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/*
Returns 1 if file is being read directly without decompression, otherwise
- zero.
+ zero. gzdirect() called immediately after gzopen() will always return zero,
+ since nothing has been read yet. Whether to read the file with
+ decompression or not is not determined until after the first read operation
+ (e.g. gzread(), gzgetc(), etc.).
*/
ZEXTERN int ZEXPORT gzclose OF((gzFile file));
/*
- Flushes all pending output if necessary, closes the compressed file
- and deallocates all the (de)compression state. The return value is the zlib
+ Flushes all pending output if necessary, closes the compressed file and
+ deallocates all the (de)compression state. The return value is the zlib
error number. Note that once file is closed, you cannot call gzerror with
file, since its structures have been deallocated.
*/
@@ -1363,31 +1387,31 @@
ZEXTERN int ZEXPORT gzclose_r OF((gzFile file));
ZEXTERN int ZEXPORT gzclose_w OF((gzFile file));
/*
- Same as gz_close(), but gz_close_r() is only for use when reading, and
- gz_close_w() is only for use when writing. The advantage to using these
- instead of gz_close() is that they avoid linking in zlib compression or
+ Same as gzclose(), but gzclose_r() is only for use when reading, and
+ gzclose_w() is only for use when writing. The advantage to using these
+ instead of gzclose() is that they avoid linking in zlib compression or
decompression code that is not used when only reading or only writing
- respectively. If gz_close() is used, then both compression and
- decompression code will be included the application when linking to a
- static zlib library.
+ respectively. If gzclose() is used, then both compression and decompression
+ code will be included the application when linking to a static zlib library.
*/
ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
/*
- Returns the error message for the last error which occurred on the
- given compressed file. errnum is set to zlib error number. If an
- error occurred in the file system and not in the compression library,
- errnum is set to Z_ERRNO and the application may consult errno
- to get the exact error code.
+ Returns the error message for the last error which occurred on the given
+ compressed file. errnum is set to zlib error number. If an error occurred
+ in the file system and not in the compression library, errnum is set to
+ Z_ERRNO and the application may consult errno to get the exact error code.
- The application must not modify the returned string and future calls to
- this function may invalidate the returned string.
+ The application must not modify the returned string. Future calls to
+ this function may invalidate the previously returned string. If file is
+ closed, then the string previously returned by gzerror will no longer be
+ available.
*/
ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
/*
- Clears the error and end-of-file flags for file. This is analogous to the
- clearerr() function in stdio. This is useful for continuing to read a gzip
+ Clears the error and end-of-file flags for file. This is analogous to the
+ clearerr() function in stdio. This is useful for continuing to read a gzip
file that is being written concurrently.
*/
@@ -1395,17 +1419,20 @@
/*
These functions are not related to compression but are exported
- anyway because they might be useful in applications using the
- compression library.
+ anyway because they might be useful in applications using the compression
+ library.
*/
ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
/*
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
- return the updated checksum. If buf is Z_NULL, this function returns
- the required initial value for the checksum.
- An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
- much faster. Usage example:
+ return the updated checksum. If buf is Z_NULL, this function returns the
+ required initial value for the checksum.
+
+ An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+ much faster.
+
+ Usage example:
uLong adler = adler32(0L, Z_NULL, 0);
@@ -1428,9 +1455,11 @@
ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
/*
Update a running CRC-32 with the bytes buf[0..len-1] and return the
- updated CRC-32. If buf is Z_NULL, this function returns the required initial
- value for the for the crc. Pre- and post-conditioning (one's complement) is
- performed within this function so it shouldn't be done by the application.
+ updated CRC-32. If buf is Z_NULL, this function returns the required
+ initial value for the for the crc. Pre- and post-conditioning (one's
+ complement) is performed within this function so it shouldn't be done by the
+ application.
+
Usage example:
uLong crc = crc32(0L, Z_NULL, 0);
diff --git a/zlib.map b/zlib.map
index 499213d..c99e973 100644
--- a/zlib.map
+++ b/zlib.map
@@ -14,6 +14,8 @@
zcalloc;
zcfree;
z_errmsg;
+ gz_error;
+ gzio_old;
_*;
};
@@ -51,3 +53,11 @@
inflateReset2;
inflateMark;
} ZLIB_1.2.3.3;
+
+ZLIB_1.2.3.5 {
+ gzbuffer;
+ gzoffset;
+ gzoffset64;
+ gzclose_r;
+ gzclose_w;
+} ZLIB_1.2.3.4;
diff --git a/zutil.c b/zutil.c
index d55f594..98a55a8 100644
--- a/zutil.c
+++ b/zutil.c
@@ -34,25 +34,25 @@
uLong flags;
flags = 0;
- switch (sizeof(uInt)) {
+ switch ((int)(sizeof(uInt))) {
case 2: break;
case 4: flags += 1; break;
case 8: flags += 2; break;
default: flags += 3;
}
- switch (sizeof(uLong)) {
+ switch ((int)(sizeof(uLong))) {
case 2: break;
case 4: flags += 1 << 2; break;
case 8: flags += 2 << 2; break;
default: flags += 3 << 2;
}
- switch (sizeof(voidpf)) {
+ switch ((int)(sizeof(voidpf))) {
case 2: break;
case 4: flags += 1 << 4; break;
case 8: flags += 2 << 4; break;
default: flags += 3 << 4;
}
- switch (sizeof(z_off_t)) {
+ switch ((int)(sizeof(z_off_t))) {
case 2: break;
case 4: flags += 1 << 6; break;
case 8: flags += 2 << 6; break;
diff --git a/zutil.h b/zutil.h
index 18a13cf..93d6553 100644
--- a/zutil.h
+++ b/zutil.h
@@ -116,7 +116,7 @@
#ifdef OS2
# define OS_CODE 0x06
# ifdef M_I86
- #include <malloc.h>
+# include <malloc.h>
# endif
#endif
@@ -162,9 +162,9 @@
#endif
#if defined(__BORLANDC__)
-#pragma warn -8004
-#pragma warn -8008
-#pragma warn -8066
+ #pragma warn -8004
+ #pragma warn -8008
+ #pragma warn -8066
#endif
#ifdef _LARGEFILE64_SOURCE
