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paziu
n00b
n00b


Joined: 24 Nov 2006
Posts: 66
Location: N.Carolina

PostPosted: Fri Jul 29, 2011 7:12 pm    Post subject: kgb_archiver - file compression utility Reply with quote

Hello,

I thought somebody might be interested in this 'less popular', quite interesting compression utility - kgb_archiver v1
It is not the 'fastest' compression tool, but the results show an advantage over many others...

©2005-2006 Tomasz Pawlak
based on PAQ6 by Matt Mahoney
mod by Slawek
GPLv2

http://sourceforge.net/projects/kgbarchiver/

the 'POSIX' version does not seem to compile on my x86_64 (gcc 4.4.5) same with +1y old 32 bit (gcc 4.4.3) ( SOLVED : UPDATE on the bottom of the post )
but it does compile on the ancient (gcc 3.2.3) and less ancient (gcc 4.1.2)

here are the test results ( using default compression methods ) done against native tar archive of linux-2.6.36-gentoo-r1 kernel tree ( almost 400MiB )

results (in bytes):

Code:

416307200 linux-2.6.36-gentoo-r1.tar        ( native tar )

174037960 linux-2.6.36-gentoo-r1.tar.zoo    ( zoo - Amiga days )

 93470624 linux-2.6.36-gentoo-r1.tar.arj    ( arj - also Amiga days )

 91861450 linux-2.6.36-gentoo-r1.tgz        ( tar cvzf - gzip )

 71948500 linux-2.6.36-gentoo-r1.tbz        ( tar cvjf - bzip2 )

 69702430 linux-2.6.36-gentoo-r1.tar.rar    ( rar against tar )

 67923680 linux-2.6.36-gentoo-r1.tar.uha    ( UHARC.exe in wine )
 
 61335369 linux-2.6.36-gentoo-r1.tar.7z     ( 7zip on tar )



now KGB:

 51288739 linux-2.6.36-gentoo-r1.tar.kgb    ( standard [-3] kgb compression - on tar )

 43897953 linux-2.6.36-gentoo-r1.tar.9.kgb  ( max [-9] compression - uses 1.6 GB RAM - whopping 2h 40m on a 4GHz i5 CPU - worth only if 'size REALLY matters' :) || benchmarking




this is the link for both binaries - compiled with gcc 3.2.3 and 4.1.2 on kernel 2.4.21 and 2.6.22 x86
Quote:
http://www.mediafire.com/file/9yb8u4sxx3xrr9r/kgb_arch_v1_precompiled.tgz



paziu

ps: it would be really nice to see it compiling on 64bit... :wink:

UPDATE:

add an include to the POSIX 1.x source from sourceforge:

Code:
#include <cstring>


to successfully compile under newer c++ compilers ( x86 and x86_64 )
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Silent-Hunter
Tux's lil' helper
Tux's lil' helper


Joined: 07 Jul 2013
Posts: 82

PostPosted: Sat Jan 11, 2014 2:37 am    Post subject: Reply with quote

OK, I added the include but it now complains about a different problem:

Code:
g++ -O3 -o kgb kgb_arch_posix_by_slawek.cpp
kgb_arch_posix_by_slawek.cpp: In instantiation of ‘Hashtable<T>::Hashtable(U32) [with T = Counter; U32 = long unsigned int]’:
kgb_arch_posix_by_slawek.cpp:1362:55:   required from here
kgb_arch_posix_by_slawek.cpp:1127:3: error: cast from ‘char*’ to ‘int’ loses precision [-fpermissive]


So I did this:

Code:
g++ -O3 -fpermissive -o kgb kgb_arch_posix_by_slawek.cpp
kgb_arch_posix_by_slawek.cpp: In instantiation of ‘Hashtable<T>::Hashtable(U32) [with T = Counter; U32 = long unsigned int]’:
kgb_arch_posix_by_slawek.cpp:1362:55:   required from here
kgb_arch_posix_by_slawek.cpp:1127:3: warning: cast from ‘char*’ to ‘int’ loses precision [-fpermissive]


And now it compiled, but it does this:

Code:
./kgb
kgb: kgb_arch_posix_by_slawek.cpp:612: ProgramChecker::ProgramChecker(): Assertion `sizeof(U32)==4' failed.
Aborted


I am on:

Code:
Linux TERMINAL-BMRF-9 3.10.17-gentoo #1 SMP Mon Nov 4 02:40:40 EST 2013 x86_64 Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz GenuineIntel GNU/Linux
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