Stolen from http://www.algonet.se/~bullsize/HDC/

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- libstdf
- liblzw

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Free STDF Resources : : liblzw
About

As support was added to libstdf to read compressed files, the request came up to read LZW compressed files. Many might be familiar with this compression algorithm via the classical UNIX programs compress and uncompress which manipulate files named with a .Z extension, or perhaps the usage of LZW in compressing GIF/TIFF image data.

Unable to locate a decent library with an API comparable to that of zlib or libbzip2, I decided to write my own from scratch. liblzw is the result.

Since the compression algorithms were ripped out of the public-domain package ncompress, liblzw has also been released into the public-domain for people to do with as they will. Just please send me bugfixes as you find them :).

One last note for those of you coming late to the party; all existing patents on the LZW algorithm have expired world-wide. So LZW is now patent free (whoopee!).

Status

The current implementation supports the open/read/close functions since that is all I require at this time for reading files in libstdf. Maybe if there's interest, more features can be added.

Download
Download 0.2 0.2
  • Avoid integer overflow for CVE-2010-0001
Download 0.1.2 0.1.2
  • Bundle testsuite
  • Fix liblzw.pc.in file as pointed out by Tester A.
Download 0.1.1 0.1.1
  • Fix buffer underflow bug CVE-2006-1168
Download 0.1 0.1
  • Proof of concept which can open/read files
Specs

You can find plenty of info on the LZW algorithm (just use Google), but for fun, here's some helpful links.