README - third_party/github.com/madler/zlib - Git at Google

 zlib 1.0.1 is a general purpose data compression library.  All the code
 is reentrant (thread safe).  The data format used by the zlib library
 is described in the files zlib-3.3.doc, deflate-1.3.doc and
 gzip-4.3.doc, available in various formats from
 ftp://swrinde.nde.swri.edu/pub/png/documents/zlib/

 All functions of the compression library are documented in the file
 zlib.h. A usage example of the library is given in the file example.c
 which also tests that the library is working correctly. Another
 example is given in the file minigzip.c. The compression library itself
 is composed of all source files except example.c and minigzip.c.

 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 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,
 if this fails, to the addresses given below in the Copyright section.

 The changes made in version 1.0.1 are documented in the file ChangeLog.
 Version number 1.0 was skipped to avoid confusion with version 0.99
 which had some references to 1.0 already. The main changes since 0.99 are:

 - fix array overlay in deflate.c which sometimes caused bad compressed data
 - fix inflate bug with empty stored block
 - fix MSDOS medium model which was broken in 0.99
 - fix deflateParams() which could generated bad compressed data.
 - added an INDEX file
 - new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
   Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
 - several portability improvements

 Notes for some targets:

 - For Turbo C the small model is supported only with reduced performance to
   avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3

 - For 64-bit Iris, deflate.c must be compiled without any optimization.
   With -O, one libpng test fails. The test works in 32 bit mode (with
   the -32 compiler flag).

 - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1
   it works when compiled with cc.

 - zlib doesn't work on HP-UX 9.05 with one cc compiler (the one not
   accepting the -O option). It works with the other cc compiler.

 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*


 Acknowledgments:

   The deflate format used by zlib was defined by Phil Katz. The deflate
   and zlib specifications were written by Peter Deutsch. Thanks to all the
   people who reported problems and suggested various improvements in zlib;
   they are too numerous to cite here.

 Copyright notice:

  (C) 1995-1996 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.

   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:

   1. 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.
   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.

   Jean-loup Gailly        Mark Adler
   gzip@prep.ai.mit.edu    madler@alumni.caltech.edu

 If you use the zlib library in a product, we would appreciate *not*
 receiving lengthy legal documents to sign. The sources are provided
 for free but without warranty of any kind.  The library has been
 entirely written by Jean-loup Gailly and Mark Adler; it does not
 include third-party code.

 If you redistribute modified sources, we would appreciate that you include
 in the file ChangeLog history information documenting your changes.
	zlib 1.0.1 is a general purpose data compression library. All the code
	is reentrant (thread safe). The data format used by the zlib library
	is described in the files zlib-3.3.doc, deflate-1.3.doc and
	gzip-4.3.doc, available in various formats from
	ftp://swrinde.nde.swri.edu/pub/png/documents/zlib/

	All functions of the compression library are documented in the file
	zlib.h. A usage example of the library is given in the file example.c
	which also tests that the library is working correctly. Another
	example is given in the file minigzip.c. The compression library itself
	is composed of all source files except example.c and minigzip.c.

	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 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,
	if this fails, to the addresses given below in the Copyright section.

	The changes made in version 1.0.1 are documented in the file ChangeLog.
	Version number 1.0 was skipped to avoid confusion with version 0.99
	which had some references to 1.0 already. The main changes since 0.99 are:

	- fix array overlay in deflate.c which sometimes caused bad compressed data
	- fix inflate bug with empty stored block
	- fix MSDOS medium model which was broken in 0.99
	- fix deflateParams() which could generated bad compressed data.
	- added an INDEX file
	- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
	Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
	- several portability improvements

	Notes for some targets:

	- For Turbo C the small model is supported only with reduced performance to
	avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3

	- For 64-bit Iris, deflate.c must be compiled without any optimization.
	With -O, one libpng test fails. The test works in 32 bit mode (with
	the -32 compiler flag).

	- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1
	it works when compiled with cc.

	- zlib doesn't work on HP-UX 9.05 with one cc compiler (the one not
	accepting the -O option). It works with the other cc compiler.

	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*


	Acknowledgments:

	The deflate format used by zlib was defined by Phil Katz. The deflate
	and zlib specifications were written by Peter Deutsch. Thanks to all the
	people who reported problems and suggested various improvements in zlib;
	they are too numerous to cite here.

	Copyright notice:

	(C) 1995-1996 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.

	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:

	1. 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.
	2. Altered source versions must be plainly marked as such, and must not be
	misrepresented as being the original software.
	3. This notice may not be removed or altered from any source distribution.

	Jean-loup Gailly Mark Adler
	gzip@prep.ai.mit.edu madler@alumni.caltech.edu

	If you use the zlib library in a product, we would appreciate not
	receiving lengthy legal documents to sign. The sources are provided
	for free but without warranty of any kind. The library has been
	entirely written by Jean-loup Gailly and Mark Adler; it does not
	include third-party code.

	If you redistribute modified sources, we would appreciate that you include
	in the file ChangeLog history information documenting your changes.