Compact (Gene Olson)
From Just Solve the File Format Problem
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It uses [[LZW]] compression. It is essentially an improved version of [[Compress (Unix)|compress]], with an incompatible format. The recommended filename suffix is a capitalized '''.W'''. | It uses [[LZW]] compression. It is essentially an improved version of [[Compress (Unix)|compress]], with an incompatible format. The recommended filename suffix is a capitalized '''.W'''. | ||
| − | It is not related to the older [[Compact (Unix)|compact]] format that uses adaptive Huffman coding. | + | It is not related to the older [[Compact (Unix)|compact]] format that uses [[adaptive Huffman coding]]. |
| − | == | + | == Identification == |
There is a big-endian format, which starts with bytes {{magic|c5 a3}}, and a little-endian format, which starts with {{magic|a3 c5}}. | There is a big-endian format, which starts with bytes {{magic|c5 a3}}, and a little-endian format, which starts with {{magic|a3 c5}}. | ||
Revision as of 17:21, 10 January 2021
compact is an obscure file compression utility, and associated file format, developed by Gene H. Olson. It appears to have been abandoned early on, due to patent concerns.
It uses LZW compression. It is essentially an improved version of compress, with an incompatible format. The recommended filename suffix is a capitalized .W.
It is not related to the older compact format that uses adaptive Huffman coding.
Identification
There is a big-endian format, which starts with bytes c5 a3, and a little-endian format, which starts with a3 c5.
Software
- compact_sV.tar.Z - Source distribution
