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zlib 1.2.1.1

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pull/2/head v1.2.1.1
Mark Adler 13 years ago
parent 7a33a861d1
commit f0e76a6634
14 changed files with 107 additions and 66 deletions
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  1. 7
      ChangeLog
  2. 88
      FAQ
  3. 2
      Makefile
  4. 2
      Makefile.in
  5. 6
      README
  6. 6
      as400/zlib.inc
  7. 4
      contrib/infback9/inftree9.c
  8. 8
      contrib/puff/puff.c
  9. 2
      deflate.c
  10. 16
      inftrees.c
  11. 10
      qnx/package.qpg
  12. 8
      win32/zlib1.rc
  13. 6
      zlib.3
  14. 8
      zlib.h

7
ChangeLog
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@ -1,6 +1,13 @@
ChangeLog file for zlib
Changes in 1.2.1.1 (9 January 2004)
- Updated email address in README
- Several FAQ updates
- Fixed a big fat bug in inftrees.c that prevented decoding valid
dynamic blocks with only literals and no distance codes.
- Add a note to puff.c on no distance codes case.
Changes in 1.2.1 (17 November 2003)
- Remove a tab in contrib/gzappend/gzappend.c
- Update some interfaces in contrib for new zlib functions

88
FAQ
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@ -21,18 +21,18 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
3. Where can I get a Visual Basic interface to zlib?
See
* http://www.winimage.com/zLibDll/
* http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
* contrib/visual-basic.txt in the zlib distribution
* win32/DLL_FAQ.txt in the zlib distribution
4. compress() returns Z_BUF_ERROR
4. compress() 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").
5. deflate() or inflate() returns Z_BUF_ERROR
5. deflate() or inflate() returns Z_BUF_ERROR.
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
@ -47,8 +47,8 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
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.
please contact us (zlib@gzip.org). Examples of zlib usage are in the files
example.c and minigzip.c.
7. Why don't you use GNU autoconf or libtool or ...?
@ -77,7 +77,8 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
11. Can zlib handle .zip archives?
See the directory contrib/minizip in the zlib distribution.
Not by itself, no. See the directory contrib/minizip in the zlib
distribution.
12. Can zlib handle .Z files?
@ -92,6 +93,8 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
14. How do I install a shared zlib library on Unix?
After the above, then:
make install
However, many flavors of Unix come with a shared zlib already installed.
@ -99,12 +102,31 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
trying to install it, you may want to check if it's already there! If you
can #include <zlib.h>, it's there. The -lz option will probably link to it.
15. I have a question about OttoPDF
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.
site: Joel Hainley, jhainley@myndkryme.com.
16. Can zlib decode Flate data in an Adobe PDF file?
Yes. See http://www.fastio.com/ (ClibPDF), or http://www.pdflib.com/ .
To modify PDF forms, see http://sourceforge.net/projects/acroformtool/ .
17. Why am I getting this "register_frame_info not found" error on Solaris?
After installing zlib 1.1.4 on Solaris 2.6, running applications using zlib
generates an error such as:
ld.so.1: rpm: fatal: relocation error: file /usr/local/lib/libz.so:
symbol __register_frame_info: referenced symbol not found
The symbol __register_frame_info is not part of zlib, it is generated by
the C compiler (cc or gcc). You must recompile applications using zlib
which have this problem. This problem is specific to Solaris. See
http://www.sunfreeware.com for Solaris versions of zlib and applications
using zlib.
16. Why does gzip give an error on a file I make with compress/deflate?
18. Why does gzip give an error on a file I make with compress/deflate?
The compress and deflate functions produce data in the zlib format, which
is different and incompatible with the gzip format. The gz* functions in
@ -112,7 +134,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
formats use the same compressed data format internally, but have different
headers and trailers around the compressed data.
17. Ok, so why are there two different formats?
19. Ok, so why are there two different formats?
The gzip format was designed to retain the directory information about
a single file, such as the name and last modification date. The zlib
@ -120,7 +142,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
channel applications, and has a much more compact header and trailer and
uses a faster integrity check than gzip.
18. Well that's nice, but how do I make a gzip file in memory?
20. Well that's nice, but how do I make a gzip file in memory?
You can request that deflate write the gzip format instead of the zlib
format using deflateInit2(). You can also request that inflate decode
@ -133,7 +155,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
function and roll your own gzip encoding and decoding. Read the gzip
RFC 1952 for details of the header and trailer format.
19. Is zlib thread-safe?
21. Is zlib thread-safe?
Yes. However any library routines that zlib uses and any application-
provided memory allocation routines must also be thread-safe. zlib's gz*
@ -144,15 +166,15 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
Of course, you should only operate on any given zlib or gzip stream from a
single thread at a time.
20. Can I use zlib in my commercial application?
22. Can I use zlib in my commercial application?
Yes. Please read the license in zlib.h.
21. Is zlib under the GNU license?
23. Is zlib under the GNU license?
No. Please read the license in zlib.h.
22. The license says that altered source versions must be "plainly marked". So
24. The license says that altered source versions must be "plainly marked". So
what exactly do I need to do to meet that requirement?
You need to change the ZLIB_VERSION and ZLIB_VERNUM #defines in zlib.h. In
@ -175,24 +197,24 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
ZLIB_VERSION and ZLIB_VERNUM and note the origin and nature of the changes
in zlib.h as you would for a full source distribution.
23. Will zlib work on a big-endian or little-endian architecture, and can I
25. Will zlib work on a big-endian or little-endian architecture, and can I
exchange compressed data between them?
Yes and yes.
24. Will zlib work on a 64-bit machine?
26. Will zlib work on a 64-bit machine?
It should. It has been tested on 64-bit machines, and has no dependence
on any data types being limited to 32-bits in length. If you have any
difficulties, please provide a complete problem report to zlib@gzip.org
25. Will zlib decompress data from the PKWare Data Compression Library?
27. Will zlib decompress data from the PKWare Data Compression Library?
No. The PKWare DCL uses a completely different compressed data format
than does PKZIP and zlib. However, you can look in zlib's contrib/blast
directory for a possible solution to your problem.
26. Can I access data randomly in a compressed stream?
28. Can I access data randomly in a compressed stream?
No, not without some preparation. If when compressing you periodically
use Z_FULL_FLUSH, carefully write all the pending data at those points,
@ -200,27 +222,27 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
at those points. You have to be careful to not use Z_FULL_FLUSH too
often, since it can significantly degrade compression.
27. Does zlib work on MVS, OS/390, CICS, etc.?
29. Does zlib work on MVS, OS/390, CICS, etc.?
We don't know for sure. We have heard occasional reports of success on
these systems. If you do use it on one of these, please provide us with
a report, instructions, and patches that we can reference when we get
these questions. Thanks.
28. Is there some simpler, easier to read version of inflate I can look at
30. Is there some simpler, easier to read version of inflate I can look at
to understand the deflate format?
First off, you should read RFC 1951. Second, yes. Look in zlib's
contrib/puff directory.
29. Does zlib infringe on any patents?
31. Does zlib infringe on any patents?
As far as we know, no. In fact, that was originally the whole point behind
zlib. Look here for some more information:
http://www.gzip.org/#faq11
30. Can zlib work with greater than 4 GB of data?
32. Can zlib work with greater than 4 GB of data?
Yes. inflate() and deflate() will process any amount of data correctly.
Each call of inflate() or deflate() is limited to input and output chunks
@ -238,7 +260,7 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
only if the compiler's "long" type is 32 bits. If the compiler's "long"
type is 64 bits, then the limit is 16 exabytes.
31. Does zlib have any security vulnerabilities?
33. Does zlib have any security vulnerabilities?
The only one that we are aware of is potentially in gzprintf(). If zlib
is compiled to use sprintf() or vsprintf(), then there is no protection
@ -258,35 +280,35 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
Note that you should be using the most recent version of zlib. Versions
1.1.3 and before were subject to a double-free vulnerability.
32. Is there a Java version of zlib?
34. Is there a Java version of zlib?
Probably what you want is to use zlib in Java. zlib is already included
as part of the Java SDK in the java.util.zip package. If you really want
a version of zlib written in the Java language, look on the zlib home
page for links: http://www.zlib.org/
33. I get this or that compiler or source-code scanner warning when I crank it
up to maximally-pendantic. Can't you guys write proper code?
35. I get this or that compiler or source-code scanner warning when I crank it
up to maximally-pedantic. Can't you guys write proper code?
Many years ago, we gave up attempting to avoid warnings on every compiler
in the universe. It just got to be a waste of time, and some compilers
were downright silly. So now, we simply make sure that the code always
works.
34. Will zlib read the (insert any ancient or arcane format here) compressed
36. Will zlib read the (insert any ancient or arcane format here) compressed
data format?
Probably not. Look in the comp.compression FAQ for pointers to various
formats and associated software.
35. How can I encrypt/decrypt zip files with zlib?
37. How can I encrypt/decrypt zip files with zlib?
zlib doesn't support encryption. The original PKZIP encryption is very weak
and can be broken with freely available programs. To get strong encryption,
use gpg ( http://www.gnupg.org/ ) which already includes zlib compression.
use GnuPG, http://www.gnupg.org/ , which already includes zlib compression.
For PKZIP compatible "encryption", look at http://www.info-zip.org/
36. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
38. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
"gzip" is the gzip format, and "deflate" is the zlib format. They should
probably have called the second one "zlib" instead to avoid confusion
@ -302,14 +324,14 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
Bottom line: use the gzip format for HTTP 1.1 encoding.
37. Does zlib support the new "Deflate64" format introduced by PKWare?
39. Does zlib support the new "Deflate64" format introduced by PKWare?
No. PKWare has apparently decided to keep that format proprietary, since
they have not documented it as they have previous compression formats.
In any case, the compression improvements are so modest compared to other
more modern approaches, that it's not worth the effort to implement.
38. Can you please sign these lengthy legal documents and fax them back to us
40. Can you please sign these lengthy legal documents and fax them back to us
so that we can use your software in our product?
No. Go away. Shoo.

2
Makefile
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@ -30,7 +30,7 @@ CPP=$(CC) -E
LIBS=libz.a
SHAREDLIB=libz.so
SHAREDLIBV=libz.so.1.2.1
SHAREDLIBV=libz.so.1.2.1.1
SHAREDLIBM=libz.so.1
AR=ar rc

2
Makefile.in
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@ -30,7 +30,7 @@ CPP=$(CC) -E
LIBS=libz.a
SHAREDLIB=libz.so
SHAREDLIBV=libz.so.1.2.1
SHAREDLIBV=libz.so.1.2.1.1
SHAREDLIBM=libz.so.1
AR=ar rc

6
README
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@ -1,6 +1,6 @@
ZLIB DATA COMPRESSION LIBRARY
zlib 1.2.1 is a general purpose data compression library. All the code is
zlib 1.2.1.1 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
@ -34,7 +34,7 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
issue of Dr. Dobb's Journal; a copy of the article is available in
http://dogma.net/markn/articles/zlibtool/zlibtool.htm
The changes made in version 1.2.1 are documented in the file ChangeLog.
The changes made in version 1.2.1.1 are documented in the file ChangeLog.
Unsupported third party contributions are provided in directory "contrib".
@ -46,7 +46,7 @@ A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> 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
A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
available in Python 1.5 and later versions, see
http://www.python.org/doc/lib/module-zlib.html

6
as400/zlib.inc
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@ -1,7 +1,7 @@
* ZLIB.INC - Interface to the general purpose compression library
*
* ILE RPG400 version by Patrick Monnerat, DATASPHERE.
* Version 1.2.1
* Version 1.2.1.1
*
*
* WARNING:
@ -20,8 +20,8 @@
* Constants
**************************************************************************
*
D ZLIB_VERSION C '1.2.1' Header's version
D ZLIB_VERNUM C X'1210'
D ZLIB_VERSION C '1.2.1.1' Header's version
D ZLIB_VERNUM C X'1211'
*
D Z_NO_FLUSH C 0
D Z_SYNC_FLUSH C 2

4
contrib/infback9/inftree9.c
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@ -9,7 +9,7 @@
#define MAXBITS 15
const char inflate9_copyright[] =
" inflate9 1.2.1 Copyright 1995-2003 Mark Adler ";
" inflate9 1.2.1.1 Copyright 1995-2003 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@ -64,7 +64,7 @@ unsigned short FAR *work;
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
133, 133, 133, 133, 144, 76, 66};
133, 133, 133, 133, 144, 202, 196};
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,

8
contrib/puff/puff.c
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@ -1,8 +1,8 @@
/*
* puff.c
* Copyright (C) 2002, 2003 Mark Adler
* Copyright (C) 2002-2004 Mark Adler
* For conditions of distribution and use, see copyright notice in puff.h
* version 1.7, 3 Mar 2003
* version 1.8, 9 Jan 2004
*
* puff.c is a simple inflate written to be an unambiguous way to specify the
* deflate format. It is not written for speed but rather simplicity. As a
@ -60,6 +60,7 @@
* 1.6 7 Aug 2002 - Minor format changes
* 1.7 3 Mar 2003 - Added test code for distribution
* - Added zlib-like license
* 1.8 9 Jan 2004 - Added some comments on no distance codes case
*/
#include <setjmp.h> /* for setjmp(), longjmp(), and jmp_buf */
@ -577,6 +578,9 @@ local int fixed(struct state *s)
* block is fewer bits), but it is allowed by the format. So incomplete
* literal/length codes of one symbol should also be permitted.
*
* - If there are only literal codes and no lengths, then there are no distance
* codes. This is represented by one distance code with zero bits.
*
* - The list of up to 286 length/literal lengths and up to 30 distance lengths
* are themselves compressed using Huffman codes and run-length encoding. In
* the list of code lengths, a 0 symbol means no code, a 1..15 symbol means

2
deflate.c
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@ -52,7 +52,7 @@
#include "deflate.h"
const char deflate_copyright[] =
" deflate 1.2.1 Copyright 1995-2003 Jean-loup Gailly ";
" deflate 1.2.1.1 Copyright 1995-2003 Jean-loup Gailly ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot

16
inftrees.c
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@ -1,5 +1,5 @@
/* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2004 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@ -9,7 +9,7 @@
#define MAXBITS 15
const char inflate_copyright[] =
" inflate 1.2.1 Copyright 1995-2003 Mark Adler ";
" inflate 1.2.1.1 Copyright 1995-2004 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@ -62,7 +62,7 @@ unsigned short FAR *work;
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 76, 66};
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 202, 196};
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,
@ -114,7 +114,15 @@ unsigned short FAR *work;
for (max = MAXBITS; max >= 1; max--)
if (count[max] != 0) break;
if (root > max) root = max;
if (max == 0) return -1; /* no codes! */
if (max == 0) { /* no symbols to code at all */
this.op = (unsigned char)64; /* invalid code marker */
this.bits = (unsigned char)1;
this.val = (unsigned short)0;
*(*table)++ = this; /* make a table to force an error */
*(*table)++ = this;
*bits = 1;
return 0; /* no symbols, but wait for decoding to report error */
}
for (min = 1; min <= MAXBITS; min++)
if (count[min] != 0) break;
if (root < min) root = min;

10
qnx/package.qpg
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@ -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.1.2.1" install="/opt/lib/" user="root:bin" permission="644"/>
<QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.1"/>
<QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.1"/>
<QPG:Add file="../libz.so.1.2.1" install="/opt/lib/" component="slib"/>
<QPG:Add file="../libz.so.1.2.1.1" install="/opt/lib/" user="root:bin" permission="644"/>
<QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.1.1"/>
<QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.1.1"/>
<QPG:Add file="../libz.so.1.2.1.1" install="/opt/lib/" component="slib"/>
</QPG:Files>
<QPG:PackageFilter>
@ -63,7 +63,7 @@
</QPM:ProductDescription>
<QPM:ReleaseDescription>
<QPM:ReleaseVersion>1.2.1</QPM:ReleaseVersion>
<QPM:ReleaseVersion>1.2.1.1</QPM:ReleaseVersion>
<QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
<QPM:ReleaseStability>Stable</QPM:ReleaseStability>
<QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>

8
win32/zlib1.rc
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@ -5,8 +5,8 @@ VS_VERSION_INFO VERSIONINFO
#else
VS_VERSION_INFO VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
#endif
FILEVERSION 1,2,1,0
PRODUCTVERSION 1,2,1,0
FILEVERSION 1,2,1,1
PRODUCTVERSION 1,2,1,1
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
#ifdef _DEBUG
FILEFLAGS 1
@ -23,12 +23,12 @@ BEGIN
//language ID = U.S. English, char set = Windows, Multilingual
BEGIN
VALUE "FileDescription", "zlib data compression library\0"
VALUE "FileVersion", "1.2.1\0"
VALUE "FileVersion", "1.2.1.1\0"
VALUE "InternalName", "zlib1.dll\0"
VALUE "LegalCopyright", "(C) 1995-2003 Jean-loup Gailly & Mark Adler\0"
VALUE "OriginalFilename", "zlib1.dll\0"
VALUE "ProductName", "zlib\0"
VALUE "ProductVersion", "1.2.1\0"
VALUE "ProductVersion", "1.2.1.1\0"
VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
END
END

6
zlib.3
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@ -1,4 +1,4 @@
.TH ZLIB 3 "17 November 2003"
.TH ZLIB 3 "9 January 2004"
.SH NAME
zlib \- compression/decompression library
.SH SYNOPSIS
@ -133,8 +133,8 @@ before asking for help.
Send questions and/or comments to zlib@gzip.org,
or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
.SH AUTHORS
Version 1.2.1
Copyright (C) 1995-2003 Jean-loup Gailly (jloup@gzip.org)
Version 1.2.1.1
Copyright (C) 1995-2004 Jean-loup Gailly (jloup@gzip.org)
and Mark Adler (madler@alumni.caltech.edu).
.LP
This software is provided "as-is,"

8
zlib.h
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@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.1, November 17th, 2003
version 1.2.1.1, January 9th, 2004
Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
Copyright (C) 1995-2004 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
@ -37,8 +37,8 @@
extern "C" {
#endif
#define ZLIB_VERSION "1.2.1"
#define ZLIB_VERNUM 0x1210
#define ZLIB_VERSION "1.2.1.1"
#define ZLIB_VERNUM 0x1211
/*
The 'zlib' compression library provides in-memory compression and

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