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Lzip is a lossless data compressor based on the LZMA algorithm, with very safe integrity checking and a user interface similar to the one of gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses better than bzip2, which makes it well suited for software distribution and data archiving.

Lziprecover is a data recovery tool for lzip compressed files able to repair slightly damaged files, recover badly damaged files from two or more copies, and extract undamaged members from multi-member files.

2010-09-16 Antonio Diaz Diaz

* Version 1.11 released.

* Added new option `-0' which produces a compression speed and ratio comparable to those of `gzip -9'.

* fast_encoder.h fast_encoder.cc: New files.

* main.cc: Match length limit set by options -1 to -8 has been reduced to extend range of use towards gzip. Lower numbers now compress less but faster. (-1 now takes 43% less time for only 20% larger compressed size).

* encoder.cc: Compression of option -9 has been slightly increased.

* lziprecover.cc: Added new option "--merge" which tries to produce a correct file merging the good parts of two or more damaged copies.

* lziprecover.cc: Added new option "--repair" for repairing a 1-byte error in single-member files.

* decoder.cc (decode_member): Detect file errors earlier to improve efficiency of lziprecover's new repair capability.

This change also prevents (harmless) access to uninitialized memory when decompressing a corrupt file.

* lziprecover.cc: Added new option "--force".

* lziprecover.cc: Added new option "--output".

* lziprecover.cc: Added new option "--split" to select the until now only operation of splitting multimember files.

* lziprecover.cc: If no operation is specified, warn the user and do nothing.

* main.cc: Fixed warning about fchown's return value being ignored.

* decoder.cc: "-tvvvv" now also shows compression ratio.

* main.cc: Set stdin/stdout in binary mode on MSVC and OS2.

* New examples have been added to the manual.

* testsuite: "test1" renamed to "test.txt"

* Matchfinder types HC4 (4 bytes hash-chain) and HT4 (4 bytes hash-table) have been tested and found no better than the current BT4.