文件列表:

xwrt (0, 2007-10-27)
xwrt\src (0, 2007-10-27)
xwrt\src\Common.cpp (25399, 2007-10-27)
xwrt\src\Common.h (2629, 2007-10-25)
xwrt\src\Decoder.cpp (30576, 2007-10-26)
xwrt\src\Decoder.h (1553, 2006-11-28)
xwrt\src\Encoder.cpp (59339, 2007-10-25)
xwrt\src\Encoder.h (2143, 2007-01-30)
xwrt\src\lpaq6.h (1681, 2007-10-25)
xwrt\src\lpaq6.hpp (44164, 2007-10-26)
xwrt\src\Makefile (495, 2007-10-27)
xwrt\src\MemBuffer.cpp (17870, 2007-10-26)
xwrt\src\MemBuffer.h (2302, 2007-02-16)
xwrt\src\XWRT.cpp (10151, 2007-10-26)
xwrt\src\XWRT.dsp (5043, 2007-10-27)
xwrt\src\XWRT.dsw (531, 2006-12-21)
xwrt\src\XWRT.h (4982, 2007-10-27)
xwrt\xwrt.exe (128512, 2007-10-27)
xwrt\xwrt_linux (322872, 2007-10-29)

XWRT 3.2 - XML compressor (C) 2006 Przemyslaw Skibinski (inikep@gmail.com) --------- zlib (C) 1995-2005 Jean-loup Gailly and Mark Adler LZMA (C) 1999-2006 Igor Pavlov PPMVC (C) 1997-2006 Dmitry Shkarin and Przemyslaw Skibinski lpaq6 (C) 2007 Matt Mahoney and Alexander Ratushnyak http://www.ii.uni.wroc.pl/~inikep/research/XML/XWRT32.zip 1. Introduction XWRT (XML-WRT) is a high-performance XML compressor. It transforms XML to more compressible form and uses zlib (default), LZMA, PPMVC, or lpaq6 as back-end compressor. This idea is based on well-known XML compressor - XMill. Moreover, XML-WRT creates a semi-dynamic dictionary and replaces frequently used words with shorter codes. There are additional techniques to improve compression ratio: -word alphabet can consist of start tags (like ''), urls, e-mails -special model for numbers encoding -input XML file is split into containers -there are special containers for dates, time, pages and fractional numbers -end tags ('') are replaced with a single char -end tags + EOL symbols can also be replaced with a single char -spaceless words model -very effective methods for white-space preserving -quotes modeling ('="' and '">' replaced with a single char) 2. History XWRT 3.2 (25.10.2007) -FastPAQ8 replaced with lpaq6 (compression level 10-14) XWRT 3.1 (05.06.2007) -improved support for XML files encoded in UTF-8 -dictionary is compressed using front compression -added little-endian/big-endian Unicode (UCS-2) support -non-textual files are compressed/stored without using a filter -***-bit compiler support XML-WRT 3.0 (14.09.2006) -internal PPMVC and FastPAQ8 compression XML-WRT 2.0 (14.06.2006) -internal zlib and LZMA compression -input XML file is split into containers depend on start-tags and end-tags and content under the same tag is sent to the same container -container for dates in format 1***0-02-31 and 01-MAR-1920 -container for times in format 11:30pm -container for numbers from 1900 to 2155 (years) -container for pages in format "x-y", where y-x<256, eg. "120-148", "1480-1600" -container for numbers in format "x-y", eg. "1234-0", "87-623" -container for two digits after period, eg. "102.00", "12.01" -container for numbers from 0.0 to 24.9 (one digit after period), eg. "12.0", "9.9" -urls (statring from "http:"), e-mails (x@y.z), "ü" added to dynamic dictionary XML-WRT 1.0 (27.03.2006) -first public release 3. Usage Usage: XWRT.exe [options] [file2] [file3] ... where is a XML file or a XWRT compressed file (it's auto-detected) you can also use wildcards (e.g., "*.xml") GENERAL OPTIONS (which also set default additional options): -i = Delete input files -l0 = no compression (memory usage up to 16 MB) -l1 = zlib fast (memory usage 16+1 MB) -l2 = zlib normal (default, memory usage 16+1 MB) -l3 = zlib best (memory usage 16+1 MB) -l4 = LZMA dict size *** KB (memory usage 16+9 MB for compression and 16+3 MB for decompression) -l5 = LZMA dict size 1 MB (memory usage 16+18 MB for compression and 16+3 MB for decompression) -l6 = LZMA dict size 8 MB (memory usage 16+84 MB for compression and 16+10 MB for decompression) -l7 = PPMVC model size 16 MB (memory usage 16+20 MB) -l8 = PPMVC model size 32 MB (memory usage 16+36 MB) -l9 = PPMVC model size *** MB (memory usage 16+70 MB) -l10 = lpaq6 model size 120 MB (memory usage 16+104 MB) -l11 = lpaq6 model size 214 MB (memory usage 16+1*** MB) -l12 = lpaq6 model size 406 MB (memory usage 16+390 MB) -l13 = lpaq6 model size 790 MB (memory usage 16+774 MB) -l14 = lpaq6 model size 1560 MB (memory usage 16+1542 MB) -o = Force overwrite of output files ADDITIONAL OPTIONS: -bX = Set maximum buffer size while creating dynamic dictionary to X MB -c = Turn off containers (without number and word containers) +d = Turn on usage of the static dictionary (requires wrt-eng.dic, which is available at http://www.ii.uni.wroc.pl/~inikep/research) -eX = Set maximum dictionary size to X words -fX = Set minimal word frequency to X -mX = Set maximum memory buffer size to X MB (default=8) -n = Turn off number containers -pX = Preprocess only (file_size/X) bytes in a first pass -s = Turn off spaces modeling option -t = Turn off "try shorter word" option -w = Turn off word containers 4. Licence This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation at http://www.gnu.org/licenses/gpl.txt or (at your option) any later version. This program is distributed without any warranty.

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