src/lib/vampimg/ZLib/readme.txt

   1 _____________________________________________________________________________
   2
   3 PASZLIB 1.0                                                   May 11th, 1998
   4
   5 Based on the zlib 1.1.2, a general purpose data compression library.
   6
   7 Copyright (C) 1998,1999,2000 by NOMSSI NZALI Jacques H. C.
   8 [kn&n DES]         See "Legal issues" for conditions of distribution and use.
   9 _____________________________________________________________________________
  10
  11
  12 Introduction
  13 ============
  14
  15 The 'zlib' compression library provides in-memory compression and
  16 decompression functions, including integrity checks of the uncompressed
  17 data.  This version of the library supports only one compression method
  18 (deflation) but other algorithms will be added later and will have the same
  19 stream interface.
  20
  21 Compression can be done in a single step if the buffers are large
  22 enough (for example if an input file is mmap'ed), or can be done by
  23 repeated calls of the compression function.  In the latter case, the
  24 application must provide more input and/or consume the output
  25 (providing more output space) before each call.
  26
  27 The default memory requirements for deflate are 256K plus a few kilobytes
  28 for small objects. The default memory requirements for inflate are 32K
  29 plus a few kilobytes for small objects.
  30
  31 Change Log
  32 ==========
  33
  34 March 24th 2000 - minizip code by Gilles Vollant ported to Pascal.
  35                   z_stream.msg defined as string[255] to avoid problems
  36                   with Delphi 2+ dynamic string handling.
  37                   changes to silence Delphi 5 compiler warning. If you
  38                   have Delphi 5, defines Delphi5 in zconf.inc
  39
  40 May 7th 1999    - Some changes for FPC
  41                   deflateCopy() has new parameters
  42                   trees.pas - record constant definition
  43 June 17th 1998  - Applied official 1.1.2 patch.
  44             Memcheck turned off by default.
  45                   zutil.pas patch for Delphi 1 memory allocation corrected.
  46                   dzlib.txt file added.
  47                   compress2() is now exported
  48
  49 June 25th 1998 -  fixed a conversion bug: in inftrees.pas, ZFREE(z, v) was
  50                   missing in line 574;
  51
  52 File list
  53 =========
  54
  55 Here is a road map to the files in the Paszlib distribution.
  56
  57 readme.txt      Introduction, Documentation
  58 dzlib.txt       Changes to Delphi sources for Paszlib stream classes
  59
  60 include file
  61
  62 zconf.inc       Configuration declarations.
  63
  64 Pascal source code files:
  65
  66 adler.pas      compute the Adler-32 checksum of a data stream
  67 crc.pas        compute the CRC-32 of a data stream
  68 gzio.pas       IO on .gz files
  69 infblock.pas   interpret and process block types to last block
  70 infcodes.pas   process literals and length/distance pairs
  71 inffast.pas    process literals and length/distance pairs fast
  72 inftrees.pas   generate Huffman trees for efficient decoding
  73 infutil.pas    types and macros common to blocks and codes
  74 strutils.pas   string utilities
  75 trees.pas      output deflated data using Huffman coding
  76 zcompres.pas   compress a memory buffer
  77 zdeflate.pas   compress data using the deflation algorithm
  78 zinflate.pas   zlib interface to inflate modules
  79 zlib.pas       zlib data structures. read the comments there!
  80 zuncompr.pas   decompress a memory buffer
  81 zutil.pas
  82
  83 minizip/ziputils.pas data structure and IO on .zip file
  84 minizip/unzip.pas
  85 minizip/zip.pas
  86
  87 Test applications
  88
  89 example.pas    usage example of the zlib compression library
  90 minigzip.pas   simulate gzip using the zlib compression library
  91 minizip/miniunz.pas  simulates unzip using the zlib compression library
  92 minizip/minizip.pas  simulates zip using the zlib compression library
  93
  94 Legal issues
  95 ============
  96
  97 Copyright (C) 1998,1999,2000 by Jacques Nomssi Nzali
  98
  99   This software is provided 'as-is', without any express or implied
 100   warranty.  In no event will the author be held liable for any damages
 101   arising from the use of this software.
 102
 103   Permission is granted to anyone to use this software for any purpose,
 104   including commercial applications, and to alter it and redistribute it
 105   freely, subject to the following restrictions:
 106
 107   1. The origin of this software must not be misrepresented; you must not
 108      claim that you wrote the original software. If you use this software
 109      in a product, an acknowledgment in the product documentation would be
 110      appreciated but is not required.
 111   2. Altered source versions must be plainly marked as such, and must not be
 112      misrepresented as being the original software.
 113   3. This notice may not be removed or altered from any source distribution.
 114
 115
 116 Archive Locations:
 117 ==================
 118
 119 Check the Paszlib home page with links
 120
 121       http://www.tu-chemnitz.de/~nomssi/paszlib.html
 122
 123 The data format used by the zlib library is described by RFCs (Request for
 124 Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
 125 (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
 126 These documents are also available in other formats from
 127 ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html.
 128 ____________________________________________________________________________
 129 Jacques Nomssi Nzali <mailto:nomssi@physik.tu-chemnitz.de> March 24th, 2000