Lzd

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Introduction

Lzd is a simplified decompressor for the lzip format with an educational purpose. Studying its source is a good first step to understand how lzip works. It is not safe to use lzd for any real work.

The source of lzd is used in the lzip manual as a reference decompressor in the description of the lzip file format. Reading the lzip manual will help you understand the source.

Lzd decompresses from standard input to standard output. Lzd will correctly decompress the concatenation of two or more compressed files. The result is the concatenation of the corresponding decompressed data. Integrity of such concatenated compressed input is also verified.

Lzd is written in C++.

The lzip file format is designed for data sharing and long-term archiving, taking into account both data integrity and decoder availability:

A nice feature of the lzip format is that a corrupt byte is easier to repair the nearer it is from the beginning of the file. Therefore, with the help of lziprecover, losing an entire archive just because of a corrupt byte near the beginning is a thing of the past.

Learn more about lzip in the Lzip Home Page.

Documentation

Lzd only includes a README file. For information about the lzip file format see the online manual of lzip below.

The manual is available in the info system of the GNU Operating System. Use info to access the top level info page. Use info lzip to access the lzip section directly.

An online manual for lzip can be found here.

Download

The latest released version of lzd can be found here. You may also subscribe to lzip-bug and receive an email every time a new version is released.

How to get help

For general discussion of bugs in lzd the mailing list lzip-bug@nongnu.org is the most appropriate forum. Please send messages as plain text. Please do not send messages encoded as HTML nor encoded as base64 MIME nor included as multiple formats. Please include a descriptive subject line. If all of the subject are "bug in lzd" it is impossible to differentiate them.

An archive of the bug report mailing list is available at http://lists.gnu.org/mailman/listinfo/lzip-bug.

How to help

To contact the author, either to report a bug or to contribute fixes or improvements, send mail to lzip-bug@nongnu.org. Please send messages as plain text. If posting patches they should be in unified diff format against the latest version. They should include a text description.

See also the lzip project page at Savannah.

Licensing

Lzd is free software distributed under a 2-clause BSD license.

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Copyright © 2017 Antonio Diaz Diaz
Lzip logo Copyright © 2013 Sonia Diaz Pacheco

You are free to copy, modify and distribute all or part of this article without limitation.

Updated: 2017-02-10