| 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 |
Parent Directory
| 
Revision Log