/packages/paszlib/readme.txt
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- _____________________________________________________________________________
- PASZLIB 1.0 May 11th, 1998
- Based on the zlib 1.1.2, a general purpose data compression library.
- Copyright (C) 1998,1999,2000 by NOMSSI NZALI Jacques H. C.
- [kn&n DES] See "Legal issues" for conditions of distribution and use.
- _____________________________________________________________________________
- Introduction
- ============
- 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
- (providing more output space) before each call.
- The default memory requirements for deflate are 256K plus a few kilobytes
- for small objects. The default memory requirements for inflate are 32K
- plus a few kilobytes for small objects.
- Change Log
- ==========
- March 24th 2000 - minizip code by Gilles Vollant ported to Pascal.
- z_stream.msg defined as string[255] to avoid problems
- with Delphi 2+ dynamic string handling.
- changes to silence Delphi 5 compiler warning. If you
- have Delphi 5, defines Delphi5 in zconf.inc
-
- May 7th 1999 - Some changes for FPC
- deflateCopy() has new parameters
- trees.pas - record constant definition
- June 17th 1998 - Applied official 1.1.2 patch.
- Memcheck turned off by default.
- zutil.pas patch for Delphi 1 memory allocation corrected.
- dzlib.txt file added.
- compress2() is now exported
- June 25th 1998 - fixed a conversion bug: in inftrees.pas, ZFREE(z, v) was
- missing in line 574;
- File list
- =========
- Here is a road map to the files in the Paszlib distribution.
- readme.txt Introduction, Documentation
- dzlib.txt Changes to Delphi sources for Paszlib stream classes
- include file
- zconf.inc Configuration declarations.
- Pascal source code files:
- adler.pas compute the Adler-32 checksum of a data stream
- crc.pas compute the CRC-32 of a data stream
- gzio.pas IO on .gz files
- infblock.pas interpret and process block types to last block
- infcodes.pas process literals and length/distance pairs
- inffast.pas process literals and length/distance pairs fast
- inftrees.pas generate Huffman trees for efficient decoding
- infutil.pas types and macros common to blocks and codes
- strutils.pas string utilities
- trees.pas output deflated data using Huffman coding
- zcompres.pas compress a memory buffer
- zdeflate.pas compress data using the deflation algorithm
- zinflate.pas zlib interface to inflate modules
- zlib.pas zlib data structures. read the comments there!
- zuncompr.pas decompress a memory buffer
- zutil.pas
- minizip/ziputils.pas data structure and IO on .zip file
- minizip/unzip.pas
- minizip/zip.pas
-
- Test applications
- example.pas usage example of the zlib compression library
- minigzip.pas simulate gzip using the zlib compression library
- minizip/miniunz.pas simulates unzip using the zlib compression library
- minizip/minizip.pas simulates zip using the zlib compression library
- Legal issues
- ============
- Copyright (C) 1998,1999,2000 by Jacques Nomssi Nzali
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the author 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.
- Archive Locations:
- ==================
- Check the Paszlib home page with links
- http://www.tu-chemnitz.de/~nomssi/paszlib.html
- The data format used by the zlib library is described by RFCs (Request for
- Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
- (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
- These documents are also available in other formats from
- ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html.
- ____________________________________________________________________________
- Jacques Nomssi Nzali <mailto:nomssi@physik.tu-chemnitz.de> March 24th, 2000