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bzip2-dev - a block-sorting file compressor
Published by David Abrahams
- Overview
This is a Zero Install feed. This software cannot be run as an application directly. It is a library for other programs to use.
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- Full name
- Description
bzip2 is a freely available, patent free (see below), high-quality data compressor. It typically compresses files to within 10% to 15% of the best available techniques (the PPM family of statistical compressors), whilst being around twice as fast at compression and six times faster at decompression. The current version is 1.0.6, released 20 Sept 2010. Version 1.0.6 removes a potential security vulnerability, CVE-2010-0405, so all users are recommended to upgrade immediately. Why would I want to use it? • Because it compresses well. So it packs more stuff into your overfull disk drives, distribution CDs, backup tapes, USB sticks, etc. And/or it reduces your customer download times, long distance network traffic, etc. It's not the world's fastest compressor, but it's still fast enough to be very useful. • Because it's open-source (BSD-style license), and, as far as I know, patent- free. (To the best of my knowledge. I can't afford to do a full patent search, so I can't guarantee this. Caveat emptor). So you can use it for whatever you like. Naturally, the source code is part of the distribution. • Because it supports (limited) recovery from media errors. If you are trying to restore compressed data from a backup tape or disk, and that data contains some errors, bzip2 may still be able to decompress those parts of the file which are undamaged. • Because you already know how to use it. bzip2's command line flags are similar to those of GNU Gzip, so if you know how to use gzip, you know how to use bzip2. • Because it's very portable. It should run on any 32 or 64-bit machine with an ANSI C compiler. The distribution should compile unmodified on Unix and Win32 systems. Earlier versions have been ported with little difficulty to a large number of weird and wonderful systems. The code is organised as a library with a programming interface. The bzip2 program itself is a client of the library. You can use the library in your own programs, to directly read and write .bz2 files, or even just to compress data in memory using the bzip2 algorithms.
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- Available versions
The list below is just for information; Zero Install will automatically select one of these versions for you.
Version Released Stability Platform Download 1.0.5 2008-03-20 stable Windows-i386 Download (36170 bytes) 1.0.6 2010-09-20 testing Windows-src Download (782025 bytes) 1.0.6 2010-09-20 testing Source code Download (782025 bytes) Non-Zero Install packages provided distributions can also provide this interface:
Distribution Package name Debian libbz2-dev RPM libbz2-devel Cygwin libbz2-dev Ports bzip2 MacPorts bzip2 - Required libraries
This feed does not list any additional requirements.