http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=Bzip2 2026-05-03T07:38:18Z Revision history for this page on the wiki MediaWiki 1.19.2 http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=48394&oldid=prev 2024-04-12T10:37:55Z

<p>‎<span dir="auto"><span class="autocomment">Software: </span> XAD</span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 10:37, 12 April 2024</td> </tr><tr><td colspan="2" class="diff-lineno">Line 37:</td> <td colspan="2" class="diff-lineno">Line 37:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://sourceware.org/bzip2/ bzip2 and libbzip2]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://sourceware.org/bzip2/ bzip2 and libbzip2]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* {{XAD}}</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr> </table>

Polluks http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=47355&oldid=prev 2023-12-28T05:14:38Z

<p>Change telparia.com samples link to template</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 05:14, 28 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno">Line 39:</td> <td colspan="2" class="diff-lineno">Line 39:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* <del class="diffchange diffchange-inline">https://telparia.com/fileFormatSamples/</del>archive/bz2<del class="diffchange diffchange-inline">/</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* <ins class="diffchange diffchange-inline">{{DexvertSamples|</ins>archive/bz2<ins class="diffchange diffchange-inline">}}</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td></tr> </table>

Dexvertbot http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=46455&oldid=prev 2023-12-16T20:36:56Z

<p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 20:36, 16 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno">Line 16:</td> <td colspan="2" class="diff-lineno">Line 16:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>The first three bytes are ASCII &quot;{{magic|BZh}}&quot;. (For signature &quot;{{magic|BZ0}}&quot;, refer to the original [[bzip]] format.) 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Its possible values range from &lt;code&gt;0x31&lt;/code&gt; to &lt;code&gt;0x39&lt;/code&gt; (ASCII &quot;&lt;code&gt;<del class="diffchange diffchange-inline">0</del>&lt;/code&gt;&quot; to &quot;&lt;code&gt;9&lt;/code&gt;&quot;).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The byte at offset 3 is a code for the block size. Its possible values range from &lt;code&gt;0x31&lt;/code&gt; to &lt;code&gt;0x39&lt;/code&gt; (ASCII &quot;&lt;code&gt;<ins class="diffchange diffchange-inline">1</ins>&lt;/code&gt;&quot; to &quot;&lt;code&gt;9&lt;/code&gt;&quot;).</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>The bytes at offset 4-9 are derived from the digits of the mathematical constant π ([[Binary-coded decimal|BCD]]-encoded).</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>The bytes at offset 4-9 are derived from the digits of the mathematical constant π ([[Binary-coded decimal|BCD]]-encoded).</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 35:</td> <td colspan="2" class="diff-lineno">Line 35:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [<del class="diffchange diffchange-inline">http</del>://sourceware.org/bzip2/ bzip2 and libbzip2]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [<ins class="diffchange diffchange-inline">https</ins>://sourceware.org/bzip2/ bzip2 and libbzip2]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2" class="diff-lineno">Line 47:</td> <td colspan="2" class="diff-lineno">Line 47:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [<del class="diffchange diffchange-inline">http</del>://sourceware.org/bzip2/ bzip2 and libbzip2 website]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [<ins class="diffchange diffchange-inline">https</ins>://sourceware.org/bzip2/ bzip2 and libbzip2 website]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://github.com/corkami/pics/blob/master/binary/BZ2.png Chart of format details]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://github.com/corkami/pics/blob/master/binary/BZ2.png Chart of format details]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] (LWN article from August 9, 2018)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] (LWN article from August 9, 2018)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [{{ForensicsWikiURL|bzip2}} ForensicsWiki entry] (also includes more details on the headers)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [{{ForensicsWikiURL|bzip2}} ForensicsWiki entry] (also includes more details on the headers)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.bzip.org/ bzip.org]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.bzip.org/ bzip.org]</div></td></tr> </table>

Jsummers http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=46454&oldid=prev 2023-12-16T19:19:39Z

<p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 19:19, 16 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno">Line 12:</td> <td colspan="2" class="diff-lineno">Line 12:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Identification ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Identification ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2">&#160;</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>A bzip2 file starts with the byte pattern {{magic|42 5a 68 ?? 31 41 59 26 53 59}}.</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>A bzip2 file starts with the byte pattern {{magic|42 5a 68 ?? 31 41 59 26 53 59}}.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2" class="diff-lineno">Line 31:</td> <td colspan="2" class="diff-lineno">Line 30:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>&#160; 2e e4 8a 70 a1</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>&#160; 2e e4 8a 70 a1</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>&#160; 17 72 45 38 50</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>&#160; 17 72 45 38 50</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== Specifications ==</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [https://github.com/dsnet/compress/blob/master/doc/bzip2-format.pdf Unofficial specification by Joe Tsai]</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 41:</td> <td colspan="2" class="diff-lineno">Line 43:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Burrows–Wheeler transform]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Burrows–Wheeler transform]]</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [[bzip]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [[bzip]] <ins class="diffchange diffchange-inline">(predecessor)</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://sourceware.org/bzip2/ bzip2 and libbzip2 website]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://sourceware.org/bzip2/ bzip2 and libbzip2 website]</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [https://<del class="diffchange diffchange-inline">twitter</del>.com/<del class="diffchange diffchange-inline">angealbertini</del>/<del class="diffchange diffchange-inline">status</del>/<del class="diffchange diffchange-inline">537704386080694274</del>/<del class="diffchange diffchange-inline">photo</del>/<del class="diffchange diffchange-inline">1 </del>Chart of format details]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [https://<ins class="diffchange diffchange-inline">github</ins>.com/<ins class="diffchange diffchange-inline">corkami</ins>/<ins class="diffchange diffchange-inline">pics</ins>/<ins class="diffchange diffchange-inline">blob</ins>/<ins class="diffchange diffchange-inline">master</ins>/<ins class="diffchange diffchange-inline">binary/BZ2.png </ins>Chart of format details]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] (LWN article from August 9, 2018)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] (LWN article from August 9, 2018)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [{{ForensicsWikiURL|bzip2}} ForensicsWiki entry] (also includes more details on the headers)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [{{ForensicsWikiURL|bzip2}} ForensicsWiki entry] (also includes more details on the headers)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.bzip.org/ bzip.org]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.bzip.org/ bzip.org]</div></td></tr> </table>

Jsummers http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=46453&oldid=prev 2023-12-16T19:10:13Z

<p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 19:10, 16 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno">Line 6:</td> <td colspan="2" class="diff-lineno">Line 6:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|mimetypes={{mimetype|application/x-bzip2}}</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|mimetypes={{mimetype|application/x-bzip2}}</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|pronom={{PRONOM|x-fmt/268}}</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|pronom={{PRONOM|x-fmt/268}}</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">|wikidata={{wikidata|Q27866052}}</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|released=1997</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>|released=1997</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>'''bzip2''' is a data compression algorithm and compressed file format.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>'''bzip2''' is a data compression algorithm and compressed file format<ins class="diffchange diffchange-inline">. 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color:black; font-size: smaller;"><div>== Software ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [http://<del class="diffchange diffchange-inline">bzip</del>.org/ bzip2 and libbzip2]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [http://<ins class="diffchange diffchange-inline">sourceware</ins>.org<ins class="diffchange diffchange-inline">/bzip2</ins>/ bzip2 and libbzip2]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* https://telparia.com/fileFormatSamples/archive/bz2/<del class="diffchange diffchange-inline">sm.tar.bz2</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* https://telparia.com/fileFormatSamples/archive/bz2/</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 44:</td> <td colspan="2" class="diff-lineno">Line 45:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [http://sourceware.org/bzip2/ bzip2 and libbzip2 website]</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] (LWN article from August 9, 2018)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] (LWN article from August 9, 2018)</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [<del class="diffchange diffchange-inline">https://web.archive.org/web/20190809161013/http://www.forensicswiki.org/wiki/Bzip2 </del>ForensicsWiki entry] (also includes more details on the headers)</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [<ins class="diffchange diffchange-inline">{{ForensicsWikiURL|bzip2}} </ins>ForensicsWiki entry] (also includes more details on the headers)</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* [http://www.bzip.org/ bzip.org]</ins></div></td></tr> </table>

Jsummers http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=46452&oldid=prev 2023-12-16T19:06:37Z

<p>‎<span dir="auto"><span class="autocomment">Identification</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 19:06, 16 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno">Line 12:</td> <td colspan="2" class="diff-lineno">Line 12:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Identification ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Identification ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">Files begin </del>with magic <del class="diffchange diffchange-inline">number &quot;BZ&quot; (bytes </del>42 <del class="diffchange diffchange-inline">5A). Then either an &quot;h&quot; (0x68; [[Huffman coding]]) or &quot;0&quot; (0x30; deprecated original version), then the block size, in 100kb units (TODO: clarify this)</del>.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">A bzip2 file starts </ins>with <ins class="diffchange diffchange-inline">the byte pattern {{</ins>magic<ins class="diffchange diffchange-inline">|</ins>42 <ins class="diffchange diffchange-inline">5a 68 ?? 31 41 59 26 53 59}}</ins>.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">Each compressed block starts with a </del>magic <del class="diffchange diffchange-inline">number 0x314159265359 </del>(<del class="diffchange diffchange-inline">yes</del>, <del class="diffchange diffchange-inline">that is </del>the <del class="diffchange diffchange-inline">start of decimal π</del>, but <del class="diffchange diffchange-inline">in hex</del>.<del class="diffchange diffchange-inline">) </del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">The first three bytes are ASCII &quot;{{</ins>magic<ins class="diffchange diffchange-inline">|BZh}}&quot;. </ins>(<ins class="diffchange diffchange-inline">For signature &quot;{{magic|BZ0}}&quot;</ins>, <ins class="diffchange diffchange-inline">refer to </ins>the <ins class="diffchange diffchange-inline">original [[bzip]] format.) The &quot;&lt;code&gt;h&lt;/code&gt;&quot; has been said to stand for &quot;Huffman coding&quot;</ins>, but <ins class="diffchange diffchange-inline">confirmation is needed</ins>.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The end of file marker uses magic number <del class="diffchange diffchange-inline">0x177245385090 </del>(square root of π, <del class="diffchange diffchange-inline">in the same </del>.<del class="diffchange diffchange-inline">.. interesting ... format.)</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">The byte at offset 3 is a code for the block size. Its possible values range from &lt;code&gt;0x31&lt;/code&gt; to &lt;code&gt;0x39&lt;/code&gt; (ASCII &quot;&lt;code&gt;0&lt;/code&gt;&quot; to &quot;&lt;code&gt;9&lt;/code&gt;&quot;).</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">The bytes at offset 4-9 are derived from the digits of the mathematical constant π ([[Binary-coded decimal|BCD]]-encoded).</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The end<ins class="diffchange diffchange-inline">-</ins>of<ins class="diffchange diffchange-inline">-</ins>file marker uses magic number (<ins class="diffchange diffchange-inline">hex) {{magic|17 72 45 38 50 90}}, derived from the </ins>square root of π<ins class="diffchange diffchange-inline">. However</ins>, <ins class="diffchange diffchange-inline">it is not byte-aligned</ins>. <ins class="diffchange diffchange-inline">The result is that one of the following byte sequences appears beginning 10 bytes from the end of the file:</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> b9 22 9c 28 48</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> dc 91 4e 14 24</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> ee 48 a7 0a 12</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> 77 24 53 85 09</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> bb 92 29 c2 84</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> 5d c9 14 e1 42</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> 2e e4 8a 70 a1</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> 17 72 45 38 50</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr> </table>

Jsummers http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=38375&oldid=prev 2020-10-26T01:20:01Z

<p>add details from ForensicsWiki entry</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 01:20, 26 October 2020</td> </tr><tr><td colspan="2" class="diff-lineno">Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Identification ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Identification ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">Files begin with bytes &lt;code&gt;42 5A 68 ?? 31 41 59 26 53 59&lt;/code&gt;.</del></div></td><td colspan="2">&#160;</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">Note that part of the signature is a </del>[[<del class="diffchange diffchange-inline">Binary-coded decimal|BCD</del>]] <del class="diffchange diffchange-inline">representation of </del>the <del class="diffchange diffchange-inline">digits </del>of π.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Files begin with magic number &quot;BZ&quot; (bytes 42 5A). Then either an &quot;h&quot; (0x68; </ins>[[<ins class="diffchange diffchange-inline">Huffman coding</ins>]]<ins class="diffchange diffchange-inline">) or &quot;0&quot; (0x30; deprecated original version), then </ins>the <ins class="diffchange diffchange-inline">block size, in 100kb units (TODO: clarify this).</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Each compressed block starts with a magic number 0x314159265359 (yes, that is the start </ins>of <ins class="diffchange diffchange-inline">decimal </ins>π<ins class="diffchange diffchange-inline">, but in hex.) </ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">The end of file marker uses magic number 0x177245385090 (square root of π, in the same ... interesting ... format</ins>.<ins class="diffchange diffchange-inline">)</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 29:</td> <td colspan="2" class="diff-lineno">Line 32:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [https://lwn.net/Articles/762264/ bzip.org changes hands] <ins class="diffchange diffchange-inline">(LWN article from August 9, 2018)</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* [https://web.archive.org/web/20190809161013/http://www.forensicswiki.org/wiki/Bzip2 ForensicsWiki entry] (also includes more details on the headers)</ins></div></td></tr> </table>

JesseW http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=36391&oldid=prev 2020-07-26T20:02:21Z

<p>Added sample file</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 20:02, 26 July 2020</td> </tr><tr><td colspan="2" class="diff-lineno">Line 18:</td> <td colspan="2" class="diff-lineno">Line 18:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://bzip.org/ bzip2 and libbzip2]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://bzip.org/ bzip2 and libbzip2]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[7-Zip]]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== Sample files ==</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* https://telparia.com/fileFormatSamples/archive/bz2/sm.tar.bz2</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== See also ==</div></td></tr> </table>

Sembiance http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=30420&oldid=prev 2018-10-09T13:12:15Z

<p>‎<span dir="auto"><span class="autocomment">Links</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:12, 9 October 2018</td> </tr><tr><td colspan="2" class="diff-lineno">Line 26:</td> <td colspan="2" class="diff-lineno">Line 26:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [https://lwn.net/Articles/762264/ bzip.org changes hands]</ins></div></td></tr> </table>

Dan Tobias http://fileformats.archiveteam.org/index.php?title=Bzip2&diff=19780&oldid=prev 2014-11-29T16:19:42Z

<p>‎<span dir="auto"><span class="autocomment">Links</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 16:19, 29 November 2014</td> </tr><tr><td colspan="2" class="diff-lineno">Line 25:</td> <td colspan="2" class="diff-lineno">Line 25:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [[Wikipedia:Bzip2|Wikipedia article]]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [https://twitter.com/angealbertini/status/537704386080694274/photo/1 Chart of format details]</ins></div></td></tr> </table>

Jsummers