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zlib upgrade
- From: daniel dot neri at sigicom dot se (Daniel Néri)
- To: ecos-patches at sources dot redhat dot com
- Date: Thu, 13 Nov 2003 20:01:43 +0100
- Subject: zlib upgrade
- Cancel-lock: sha1:+V8Mta89qIA8W/WYmHYW+RtrVNc=
- Organization: Sigicom AB, Stockholm, Sweden
Hello,
Here's a patch that brings our zlib to version 1.1.4.
Regards,
--Daniel
Index: services/compress/zlib/current/ChangeLog
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/ChangeLog,v
retrieving revision 1.1.1.2
retrieving revision 1.2
diff -p -U5 -r1.1.1.2 -r1.2
--- services/compress/zlib/current/ChangeLog 2003/09/09 07:29:03 1.1.1.2
+++ services/compress/zlib/current/ChangeLog 2003/11/13 18:44:35 1.2
@@ -1,5 +1,10 @@
+2003-11-13 Daniel Néri <daniel.neri@sigicom.se>
+
+ * Upgrade to zlib 1.1.4 and additional fix for inflate bug on
+ machines with 16-bit pointers.
+
2003-09-08 Thomas Koeller <thomas.koeller@baslerweb.com>
* cdl/compress_zlib.cdl : Displayed package name was wrong.
2002-10-10 Andrew Lunn <andrew.lunn@ascom.ch>
Index: services/compress/zlib/current/include/zconf.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/include/zconf.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/include/zconf.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/include/zconf.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
Index: services/compress/zlib/current/include/zlib.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/include/zlib.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/include/zlib.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/include/zlib.h 2003/11/13 18:03:24 1.2
@@ -1,9 +1,9 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.1.3, July 9th, 1998
+ version 1.1.4, March 11th, 2002
- Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
+ Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
@@ -35,11 +35,11 @@
#ifdef __cplusplus
extern "C" {
#endif
-#define ZLIB_VERSION "1.1.3"
+#define ZLIB_VERSION "1.1.4"
/*
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
@@ -635,11 +635,10 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef
Z_STREAM_ERROR if the level parameter is invalid.
*/
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
@@ -851,10 +850,11 @@ ZEXTERN uLong ZEXPORT crc32 OF((uLong
while (read_buffer(buffer, length) != EOF) {
crc = crc32(crc, buffer, length);
}
if (crc != original_crc) error();
*/
+
/* various hacks, don't look :) */
/* deflateInit and inflateInit are macros to allow checking the zlib version
* and the compiler's view of z_stream:
Index: services/compress/zlib/current/src/ChangeLog
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/ChangeLog,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/ChangeLog 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/ChangeLog 2003/11/13 18:03:24 1.2
@@ -1,8 +1,18 @@
ChangeLog file for zlib
+Changes in 1.1.4 (11 March 2002)
+- ZFREE was repeated on same allocation on some error conditions.
+ This creates a security problem described in
+ http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+ less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+ of 256 bytes. (A complete fix will be available in 1.1.5).
+
Changes in 1.1.3 (9 July 1998)
- fix "an inflate input buffer bug that shows up on rare but persistent
occasions" (Mark)
- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
- fix gzseek(..., SEEK_SET) in write mode
Index: services/compress/zlib/current/src/FAQ
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/FAQ,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/FAQ 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/FAQ 2003/11/13 18:03:24 1.2
@@ -1,72 +1,100 @@
Frequently Asked Questions about zlib
If your question is not there, please check the zlib home page
-http://www.cdrom.com/pub/infozip/zlib/ which may have more recent information.
+http://www.zlib.org which may have more recent information.
+The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
-1) I need a Windows DLL
-2) I need a Visual Basic interface to zlib
-3) compress() returns Z_BUF_ERROR
-4) deflate or inflate returns Z_BUF_ERROR
-5) Where is the zlib documentation (man pages, etc...)?
-6) Why don't you use GNU autoconf, libtool, etc...?
-7) There is a bug in zlib.
-8) I get "undefined reference to gzputc"
+ 1. Is zlib Y2K-compliant?
+ Yes. zlib doesn't handle dates.
+ 2. Where can I get a Windows DLL version?
-1) I need a Windows DLL
+ The zlib sources can be compiled without change to produce a DLL. If you
+ want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions
+ about the zlib DLL should be sent to Gilles Vollant (info@winimage.com).
- The zlib sources can be compiled without change to produce a DLL.
- If you want a precompiled DLL, see http://www.winimage.com/zLibDll
+ 3. Where can I get a Visual Basic interface to zlib?
+ See
+ * http://www.winimage.com/zLibDll/cmp-z-it.zip
+ * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
+ * contrib/visual-basic.txt in the zlib distribution
-2) I need a Visual Basic interface to zlib
+ 4. compress() returns Z_BUF_ERROR
- See http://www.tcfb.com/dowseware/cmp-z-it.zip
- http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
- and contrib/visual-basic.txt
+ Make sure that before the call of compress, the length of the compressed
+ buffer is equal to the total size of the compressed buffer and not
+ zero. For Visual Basic, check that this parameter is passed by reference
+ ("as any"), not by value ("as long").
-3) compress() returns Z_BUF_ERROR
+ 5. deflate() or inflate() returns Z_BUF_ERROR
- Make sure that before the call of compress, the length of the
- compressed buffer is equal to the total size of the compressed buffer
- and not zero. For Visual Basic, check that this parameter is passed
- by reference ("as any"), not by value ("as long").
+ Before making the call, make sure that avail_in and avail_out are not
+ zero. When setting the parameter flush equal to Z_FINISH, also make sure
+ that avail_out is big enough to allow processing all pending input.
+ 6. Where's the zlib documentation (man pages, etc.)?
-4) deflate or inflate returns Z_BUF_ERROR
+ It's in zlib.h for the moment, and Francis S. Lin has converted it to a
+ web page zlib.html. Volunteers to transform this to Unix-style man pages,
+ please contact Jean-loup Gailly (jloup@gzip.org). Examples of zlib usage
+ are in the files example.c and minigzip.c.
- Make sure that before the call avail_in and avail_out are not zero.
+ 7. Why don't you use GNU autoconf or libtool or ...?
+ Because we would like to keep zlib as a very small and simple
+ package. zlib is rather portable and doesn't need much configuration.
-5) Where is the zlib documentation (man pages, etc...)?
+ 8. I found a bug in zlib.
- It's in zlib.h for the moment. Volunteers to transform this
- to man pages, please contact jloup@gzip.org. Examples of zlib usage
- are in the files example.c and minigzip.c.
+ Most of the time, such problems are due to an incorrect usage of
+ zlib. Please try to reproduce the problem with a small program and send
+ the corresponding source to us at zlib@gzip.org . Do not send
+ multi-megabyte data files without prior agreement.
+ 9. Why do I get "undefined reference to gzputc"?
-6) Why don't you use GNU autoconf, libtool, etc...?
+ If "make test" produces something like
- Because we would like to keep zlib as a very small and simple package.
- zlib is rather portable and doesn't need much configuration.
+ example.o(.text+0x154): undefined reference to `gzputc'
+
+ check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
+ /usr/X11R6/lib. Remove any old versions, then do "make install".
+10. I need a Delphi interface to zlib.
-7) There is a bug in zlib.
+ See the directories contrib/delphi and contrib/delphi2 in the zlib
+ distribution.
- Most of the time, such problems are due to an incorrect usage
- of zlib. Please try to reproduce the problem with a small
- program and send us the corresponding source at zlib@quest.jpl.nasa.gov
- Do not send multi-megabyte data files without prior agreement.
+11. Can zlib handle .zip archives?
+ See the directory contrib/minizip in the zlib distribution.
-8) I get "undefined reference to gzputc"
+12. Can zlib handle .Z files?
- If "make test" produces something like
- example.o(.text+0x174):
- check that you don't have old files libz.* in /usr/lib, /usr/local/lib
- or /usr/X11R6/lib. Remove old versions then do "make install".
+ No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt
+ the code of uncompress on your own.
+13. How can I make a Unix shared library?
+
+ make clean
+ ./configure -s
+ make
+
+14. Why does "make test" fail on Mac OS X?
+
+ Mac OS X already includes zlib as a shared library, and so -lz links the
+ shared library instead of the one that the "make" compiled. For zlib
+ 1.1.3, the two are incompatible due to different compile-time
+ options. Simply change the -lz in the Makefile to libz.a, and it will use
+ the compiled library instead of the shared one and the "make test" will
+ succeed.
+
+15. I have a question about OttoPDF
+
+ We are not the authors of OttoPDF. The real author is on the OttoPDF web
+ site Joel Hainley jhainley@myndkryme.com.
Index: services/compress/zlib/current/src/Makefile
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/Makefile,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/Makefile 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/Makefile 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
# Makefile for zlib
-# Copyright (C) 1995-1998 Jean-loup Gailly.
+# Copyright (C) 1995-2002 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
# ./configure; make test
# The call of configure is optional if you don't have special requirements
@@ -22,11 +22,11 @@ CFLAGS=-O
LDFLAGS=-L. -lz
LDSHARED=$(CC)
CPP=$(CC) -E
-VER=1.1.3
+VER=1.1.4
LIBS=libz.a
SHAREDLIB=libz.so
AR=ar rc
RANLIB=ranlib
@@ -45,11 +45,12 @@ OBJA =
# to use the asm code: make OBJA=match.o
TEST_OBJS = example.o minigzip.o
DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
- algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+ algorithm.txt zlib.3 zlib.html \
+ msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
contrib/asm[56]86/*.S contrib/iostream/*.cpp \
contrib/iostream/*.h contrib/iostream2/*.h contrib/iostream2/*.cpp \
Index: services/compress/zlib/current/src/Makefile.in
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/Makefile.in,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/Makefile.in 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/Makefile.in 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
# Makefile for zlib
-# Copyright (C) 1995-1998 Jean-loup Gailly.
+# Copyright (C) 1995-2002 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
# ./configure; make test
# The call of configure is optional if you don't have special requirements
@@ -22,11 +22,11 @@ CFLAGS=-O
LDFLAGS=-L. -lz
LDSHARED=$(CC)
CPP=$(CC) -E
-VER=1.1.3
+VER=1.1.4
LIBS=libz.a
SHAREDLIB=libz.so
AR=ar rc
RANLIB=ranlib
@@ -45,11 +45,12 @@ OBJA =
# to use the asm code: make OBJA=match.o
TEST_OBJS = example.o minigzip.o
DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
- algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+ algorithm.txt zlib.3 zlib.html \
+ msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
contrib/asm[56]86/*.S contrib/iostream/*.cpp \
contrib/iostream/*.h contrib/iostream2/*.h contrib/iostream2/*.cpp \
Index: services/compress/zlib/current/src/README
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/README,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/README 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/README 2003/11/13 18:03:24 1.2
@@ -1,9 +1,9 @@
-zlib 1.1.3 is a general purpose data compression library. All the code
+zlib 1.1.4 is a general purpose data compression library. All the code
is thread safe. The data format used by the zlib library
is described by RFCs (Request for Comments) 1950 to 1952 in the files
-ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
+http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
format) and rfc1952.txt (gzip format). These documents are also available in
other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
All functions of the compression library are documented in the file zlib.h
(volunteer to write man pages welcome, contact jloup@gzip.org). A usage
@@ -12,55 +12,54 @@ the library is working correctly. Anothe
minigzip.c. The compression library itself is composed of all source files
except example.c and minigzip.c.
To compile all files and run the test program, follow the instructions
given at the top of Makefile. In short "make test; make install"
-should work for most machines. For Unix: "configure; make test; make install"
+should work for most machines. For Unix: "./configure; make test; make install"
For MSDOS, use one of the special makefiles such as Makefile.msc.
For VMS, use Make_vms.com or descrip.mms.
-Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov>, or to
+Questions about zlib should be sent to <zlib@gzip.org>, or to
Gilles Vollant <info@winimage.com> for the Windows DLL version.
-The zlib home page is http://www.cdrom.com/pub/infozip/zlib/
-The official zlib ftp site is ftp://ftp.cdrom.com/pub/infozip/zlib/
-Before reporting a problem, please check those sites to verify that
+The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/
+Before reporting a problem, please check this site to verify that
you have the latest version of zlib; otherwise get the latest version and
check whether the problem still exists or not.
-Mark Nelson <markn@tiny.com> wrote an article about zlib for the Jan. 1997
+PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html
+before asking for help.
+
+Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
issue of Dr. Dobb's Journal; a copy of the article is available in
-http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
-The changes made in version 1.1.3 are documented in the file ChangeLog.
-The main changes since 1.1.2 are:
+The changes made in version 1.1.4 are documented in the file ChangeLog.
+The only changes made since 1.1.3 are bug corrections:
-- fix "an inflate input buffer bug that shows up on rare but persistent
- occasions" (Mark)
-- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
-- fix gzseek(..., SEEK_SET) in write mode
-- fix crc check after a gzeek (Frank Faubert)
-- fix miniunzip when the last entry in a zip file is itself a zip file
- (J Lillge)
-- add contrib/asm586 and contrib/asm686 (Brian Raiter)
- See http://www.muppetlabs.com/~breadbox/software/assembly.html
-- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
-- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
-- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
-- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
-- added a FAQ file
+- ZFREE was repeated on same allocation on some error conditions.
+ This creates a security problem described in
+ http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+ less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+ of 256 bytes. (A complete fix will be available in 1.1.5).
+
+The beta version 1.1.5beta includes many more changes. A new official
+version 1.1.5 will be released as soon as extensive testing has been
+completed on it.
-plus many changes for portability.
Unsupported third party contributions are provided in directory "contrib".
-A Java implementation of zlib is available in the Java Development Kit 1.1
+A Java implementation of zlib is available in the Java Development Kit
http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
-See the zlib home page http://www.cdrom.com/pub/infozip/zlib/ for details.
+See the zlib home page http://www.zlib.org for details.
A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
-is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
-ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
+is in the CPAN (Comprehensive Perl Archive Network) sites
+http://www.cpan.org/modules/by-module/Compress/
A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
is available in Python 1.5 and later versions, see
http://www.python.org/doc/lib/module-zlib.html
@@ -115,11 +114,11 @@ Acknowledgments:
people who reported problems and suggested various improvements in zlib;
they are too numerous to cite here.
Copyright notice:
- (C) 1995-1998 Jean-loup Gailly and Mark Adler
+ (C) 1995-2002 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Index: services/compress/zlib/current/src/adler32.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/adler32.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/adler32.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/adler32.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
Index: services/compress/zlib/current/src/compress.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/compress.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/compress.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/compress.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* compress.c -- compress a memory buffer
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
Index: services/compress/zlib/current/src/deflate.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/deflate.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/deflate.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/deflate.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/*
* ALGORITHM
@@ -50,11 +50,11 @@
/* @(#) $Id$ */
#include "deflate.h"
const char deflate_copyright[] =
- " deflate 1.1.3 Copyright 1995-1998 Jean-loup Gailly ";
+ " deflate 1.1.4 Copyright 1995-2002 Jean-loup Gailly ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
include such an acknowledgment, I would appreciate that you keep this
copyright string in the executable of your product.
@@ -240,11 +240,11 @@ int ZEXPORT deflateInit2_(strm, level, m
if (windowBits < 0) { /* undocumented feature: suppress zlib header */
noheader = 1;
windowBits = -windowBits;
}
if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
- windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+ windowBits < 9 || windowBits > 15 || level < 0 || level > 9 ||
strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
return Z_STREAM_ERROR;
}
s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
if (s == Z_NULL) return Z_MEM_ERROR;
Index: services/compress/zlib/current/src/deflate.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/deflate.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/deflate.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/deflate.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* deflate.h -- internal compression state
- * Copyright (C) 1995-1998 Jean-loup Gailly
+ * Copyright (C) 1995-2002 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/example.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/example.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/example.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/example.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
Index: services/compress/zlib/current/src/gzio.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/gzio.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/gzio.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/gzio.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* gzio.c -- IO on .gz files
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Compile this file with -DNO_DEFLATE to avoid the compression code.
*/
Index: services/compress/zlib/current/src/infblock.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/infblock.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/infblock.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/infblock.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* infblock.c -- interpret and process block types to last block
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infblock.h"
@@ -317,25 +317,25 @@ int r;
s->hufts, z);
if (t != Z_OK)
{
if (t == (uInt)Z_DATA_ERROR)
{
- ZFREE(z, s->sub.trees.blens);
- s->mode = BAD;
+ ZFREE(z, s->sub.trees.blens);
+ s->mode = BAD;
}
r = t;
LEAVE
}
- ZFREE(z, s->sub.trees.blens);
Tracev((stderr, "inflate: trees ok\n"));
if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
s->sub.decode.codes = c;
}
+ ZFREE(z, s->sub.trees.blens);
s->mode = CODES;
case CODES:
UPDATE
if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
return inflate_flush(s, z, r);
Index: services/compress/zlib/current/src/infblock.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/infblock.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/infblock.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/infblock.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* infblock.h -- header to use infblock.c
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/infcodes.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/infcodes.c,v
retrieving revision 1.1.1.1
retrieving revision 1.3
diff -p -U5 -r1.1.1.1 -r1.3
--- services/compress/zlib/current/src/infcodes.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/infcodes.c 2003/11/13 18:06:13 1.3
@@ -1,7 +1,7 @@
/* infcodes.c -- process literals and length/distance pairs
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
@@ -194,19 +194,13 @@ int r;
c->sub.copy.dist += (uInt)b & inflate_mask[j];
DUMPBITS(j)
Tracevv((stderr, "inflate: distance %u\n", c->sub.copy.dist));
c->mode = COPY;
case COPY: /* o: copying bytes in window, waiting for space */
-#ifndef __TURBOC__ /* Turbo C bug for following expression */
- f = (uInt)(q - s->window) < c->sub.copy.dist ?
- s->end - (c->sub.copy.dist - (q - s->window)) :
- q - c->sub.copy.dist;
-#else
f = q - c->sub.copy.dist;
- if ((uInt)(q - s->window) < c->sub.copy.dist)
- f = s->end - (c->sub.copy.dist - (uInt)(q - s->window));
-#endif
+ while (f < s->window || f >= s->end) /* get pointer in window */
+ f += s->end - s->window;
while (c->len)
{
NEEDOUT
OUTBYTE(*f++)
if (f == s->end)
Index: services/compress/zlib/current/src/infcodes.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/infcodes.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/infcodes.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/infcodes.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* infcodes.h -- header to use infcodes.c
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/inffast.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/inffast.c,v
retrieving revision 1.1.1.1
retrieving revision 1.3
diff -p -U5 -r1.1.1.1 -r1.3
--- services/compress/zlib/current/src/inffast.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/inffast.c 2003/11/13 18:06:13 1.3
@@ -1,7 +1,7 @@
/* inffast.c -- process literals and length/distance pairs fast
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
@@ -91,32 +91,45 @@ z_streamp z;
DUMPBITS(e)
Tracevv((stderr, "inflate: * distance %u\n", d));
/* do the copy */
m -= c;
- if ((uInt)(q - s->window) >= d) /* offset before dest */
- { /* just copy */
- r = q - d;
- *q++ = *r++; c--; /* minimum count is three, */
- *q++ = *r++; c--; /* so unroll loop a little */
- }
- else /* else offset after destination */
+ r = q - d;
+ if ((uInt)(q - s->window) < d) /* wrap if needed */
{
- e = d - (uInt)(q - s->window); /* bytes from offset to end */
- r = s->end - e; /* pointer to offset */
- if (c > e) /* if source crosses, */
+ do {
+ r += s->end - s->window; /* force pointer in window */
+ } while (r < s->window || r >= s->end);
+ e = s->end - r;
+ if (c > e)
{
- c -= e; /* copy to end of window */
+ c -= e; /* wrapped copy */
do {
- *q++ = *r++;
+ *q++ = *r++;
} while (--e);
- r = s->window; /* copy rest from start of window */
+ r = s->window;
+ do {
+ *q++ = *r++;
+ } while (--c);
}
+ else /* normal copy */
+ {
+ *q++ = *r++; c--;
+ *q++ = *r++; c--;
+ do {
+ *q++ = *r++;
+ } while (--c);
+ }
+ }
+ else /* normal copy */
+ {
+ *q++ = *r++; c--;
+ *q++ = *r++; c--;
+ do {
+ *q++ = *r++;
+ } while (--c);
}
- do { /* copy all or what's left */
- *q++ = *r++;
- } while (--c);
break;
}
else if ((e & 64) == 0)
{
t += t->base;
Index: services/compress/zlib/current/src/inffast.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/inffast.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/inffast.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/inffast.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* inffast.h -- header to use inffast.c
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/inflate.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/inflate.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/inflate.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/inflate.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* inflate.c -- zlib interface to inflate modules
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infblock.h"
Index: services/compress/zlib/current/src/inftrees.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/inftrees.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/inftrees.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/inftrees.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
@@ -9,11 +9,11 @@
#if !defined(BUILDFIXED) && !defined(STDC)
# define BUILDFIXED /* non ANSI compilers may not accept inffixed.h */
#endif
const char inflate_copyright[] =
- " inflate 1.1.3 Copyright 1995-1998 Mark Adler ";
+ " inflate 1.1.4 Copyright 1995-2002 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
include such an acknowledgment, I would appreciate that you keep this
copyright string in the executable of your product.
@@ -102,12 +102,11 @@ inflate_huft *hp; /* space for tre
uInt *hn; /* hufts used in space */
uIntf *v; /* working area: values in order of bit length */
/* Given a list of code lengths and a maximum table size, make a set of
tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
if the given code set is incomplete (the tables are still built in this
- case), Z_DATA_ERROR if the input is invalid (an over-subscribed set of
- lengths), or Z_MEM_ERROR if not enough memory. */
+ case), or Z_DATA_ERROR if the input is invalid. */
{
uInt a; /* counter for codes of length k */
uInt c[BMAX+1]; /* bit length count table */
uInt f; /* i repeats in table every f entries */
@@ -229,11 +228,11 @@ uIntf *v; /* working area:
}
z = 1 << j; /* table entries for j-bit table */
/* allocate new table */
if (*hn + z > MANY) /* (note: doesn't matter for fixed) */
- return Z_MEM_ERROR; /* not enough memory */
+ return Z_DATA_ERROR; /* overflow of MANY */
u[h] = q = hp + *hn;
*hn += z;
/* connect to last table, if there is one */
if (h)
Index: services/compress/zlib/current/src/inftrees.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/inftrees.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/inftrees.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/inftrees.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* inftrees.h -- header to use inftrees.c
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/infutil.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/infutil.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/infutil.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/infutil.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* inflate_util.c -- data and routines common to blocks and codes
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infblock.h"
Index: services/compress/zlib/current/src/infutil.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/infutil.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/infutil.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/infutil.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* infutil.h -- types and macros common to blocks and codes
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/maketree.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/maketree.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/maketree.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/maketree.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* maketree.c -- make inffixed.h table for decoding fixed codes
- * Copyright (C) 1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
Index: services/compress/zlib/current/src/minigzip.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/minigzip.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/minigzip.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/minigzip.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/*
* minigzip is a minimal implementation of the gzip utility. This is
Index: services/compress/zlib/current/src/trees.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/trees.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/trees.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/trees.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-1998 Jean-loup Gailly
+ * Copyright (C) 1995-2002 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/*
* ALGORITHM
Index: services/compress/zlib/current/src/uncompr.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/uncompr.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/uncompr.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/uncompr.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
Index: services/compress/zlib/current/src/zlib.3
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/zlib.3,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/zlib.3 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/zlib.3 2003/11/13 18:03:24 1.2
@@ -1,6 +1,6 @@
-.TH ZLIB 3 "9 July 1998"
+.TH ZLIB 3 "11 March 2002"
.SH NAME
zlib \- compression/decompression library
.SH SYNOPSIS
[see
.I zlib.h
@@ -79,12 +79,12 @@ rfc1952.txt (gzip format)
.LP
These documents are also available in other formats from:
.IP
ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
.SH AUTHORS
-Version 1.1.3
-Copyright (C) 1995-1998 Jean-loup Gailly (jloup@gzip.org)
+Version 1.1.4
+Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org)
and Mark Adler (madler@alumni.caltech.edu).
.LP
This software is provided "as-is,"
without any express or implied warranty.
In no event will the authors be held liable for any damages
Index: services/compress/zlib/current/src/zutil.c
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/zutil.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/zutil.c 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/zutil.c 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
Index: services/compress/zlib/current/src/zutil.h
===================================================================
RCS file: /home/dne/cvsroot/redhat/ecos/packages/services/compress/zlib/current/src/zutil.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -U5 -r1.1.1.1 -r1.2
--- services/compress/zlib/current/src/zutil.h 2003/01/27 11:16:11 1.1.1.1
+++ services/compress/zlib/current/src/zutil.h 2003/11/13 18:03:24 1.2
@@ -1,7 +1,7 @@
/* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is