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<div id="projectname">libaaruformat<span id="projectnumber">&#160;1.0</span>
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<div id="projectbrief">Aaru Data Preservation Suite - Format Library</div>
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<div class="headertitle"><div class="title">IndexHeader3 Struct Reference</div></div>
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<p>Index header (version 3) adding hierarchical chaining (identifier == IndexBlock3).
<a href="#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="index_8h_source.html">aaruformat/structs/index.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-pub-attribs" class="groupheader"><a id="pub-attribs" name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr class="memitem:a482f94fd93019dd2879d984bc8eecf67" id="r_a482f94fd93019dd2879d984bc8eecf67"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a482f94fd93019dd2879d984bc8eecf67">identifier</a></td></tr>
<tr class="memdesc:a482f94fd93019dd2879d984bc8eecf67"><td class="mdescLeft">&#160;</td><td class="mdescRight">Block identifier (must be BlockType::IndexBlock3). <br /></td></tr>
<tr class="memitem:af05fe8e08e929aa0eab6b74638f22b74" id="r_af05fe8e08e929aa0eab6b74638f22b74"><td class="memItemLeft" align="right" valign="top">uint64_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#af05fe8e08e929aa0eab6b74638f22b74">entries</a></td></tr>
<tr class="memdesc:af05fe8e08e929aa0eab6b74638f22b74"><td class="mdescLeft">&#160;</td><td class="mdescRight">Number of <a class="el" href="structIndexEntry.html">IndexEntry</a> records that follow in this (sub)index block. <br /></td></tr>
<tr class="memitem:a7291ac63956c468bf48aa17d24d3f7b2" id="r_a7291ac63956c468bf48aa17d24d3f7b2"><td class="memItemLeft" align="right" valign="top">uint64_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a7291ac63956c468bf48aa17d24d3f7b2">crc64</a></td></tr>
<tr class="memdesc:a7291ac63956c468bf48aa17d24d3f7b2"><td class="mdescLeft">&#160;</td><td class="mdescRight">CRC64-ECMA of the local entries array (does NOT cover subindexes or previous chains). <br /></td></tr>
<tr class="memitem:a33743c206cb10cc1d8ff2c7f9e61ddcf" id="r_a33743c206cb10cc1d8ff2c7f9e61ddcf"><td class="memItemLeft" align="right" valign="top">uint64_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a33743c206cb10cc1d8ff2c7f9e61ddcf">previous</a></td></tr>
<tr class="memdesc:a33743c206cb10cc1d8ff2c7f9e61ddcf"><td class="mdescLeft">&#160;</td><td class="mdescRight">File offset of a previous IndexBlock3 header (0 if none / root segment). <br /></td></tr>
</table>
<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Index header (version 3) adding hierarchical chaining (identifier == IndexBlock3). </p>
<p>Supports flattened hierarchical indexes: entries referencing additional IndexBlock3 subindexes. The 'previous' pointer allows chaining earlier index segments (e.g., incremental append) enabling cumulative discovery without rewriting earlier headers. </p>
<p class="definition">Definition at line <a class="el" href="index_8h_source.html#l00092">92</a> of file <a class="el" href="index_8h_source.html">index.h</a>.</p>
</div><a name="doc-variable-members" id="doc-variable-members"></a><h2 id="header-doc-variable-members" class="groupheader">Field Documentation</h2>
<a id="a7291ac63956c468bf48aa17d24d3f7b2" name="a7291ac63956c468bf48aa17d24d3f7b2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7291ac63956c468bf48aa17d24d3f7b2">&#9670;&#160;</a></span>crc64</h2>
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<td class="memname">uint64_t IndexHeader3::crc64</td>
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<p>CRC64-ECMA of the local entries array (does NOT cover subindexes or previous chains). </p>
<p class="definition">Definition at line <a class="el" href="index_8h_source.html#l00096">96</a> of file <a class="el" href="index_8h_source.html">index.h</a>.</p>
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<p class="reference">Referenced by <a class="el" href="index__v3_8c_source.html#l00408">verify_index_v3()</a>, and <a class="el" href="close_8c_source.html#l03864">write_index_block()</a>.</p>
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<a id="af05fe8e08e929aa0eab6b74638f22b74" name="af05fe8e08e929aa0eab6b74638f22b74"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af05fe8e08e929aa0eab6b74638f22b74">&#9670;&#160;</a></span>entries</h2>
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<td class="memname">uint64_t IndexHeader3::entries</td>
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<p>Number of <a class="el" href="structIndexEntry.html">IndexEntry</a> records that follow in this (sub)index block. </p>
<p class="definition">Definition at line <a class="el" href="index_8h_source.html#l00095">95</a> of file <a class="el" href="index_8h_source.html">index.h</a>.</p>
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<p class="reference">Referenced by <a class="el" href="index__v3_8c_source.html#l00247">add_subindex_entries()</a>, <a class="el" href="index__v3_8c_source.html#l00098">process_index_v3()</a>, <a class="el" href="index__v3_8c_source.html#l00408">verify_index_v3()</a>, and <a class="el" href="close_8c_source.html#l03864">write_index_block()</a>.</p>
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<a id="a482f94fd93019dd2879d984bc8eecf67" name="a482f94fd93019dd2879d984bc8eecf67"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a482f94fd93019dd2879d984bc8eecf67">&#9670;&#160;</a></span>identifier</h2>
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<td class="memname">uint32_t IndexHeader3::identifier</td>
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<p>Block identifier (must be BlockType::IndexBlock3). </p>
<p class="definition">Definition at line <a class="el" href="index_8h_source.html#l00094">94</a> of file <a class="el" href="index_8h_source.html">index.h</a>.</p>
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<p class="reference">Referenced by <a class="el" href="index__v3_8c_source.html#l00247">add_subindex_entries()</a>, <a class="el" href="index__v3_8c_source.html#l00098">process_index_v3()</a>, <a class="el" href="index__v3_8c_source.html#l00408">verify_index_v3()</a>, and <a class="el" href="close_8c_source.html#l03864">write_index_block()</a>.</p>
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<a id="a33743c206cb10cc1d8ff2c7f9e61ddcf" name="a33743c206cb10cc1d8ff2c7f9e61ddcf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a33743c206cb10cc1d8ff2c7f9e61ddcf">&#9670;&#160;</a></span>previous</h2>
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<td class="memname">uint64_t IndexHeader3::previous</td>
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<p>File offset of a previous IndexBlock3 header (0 if none / root segment). </p>
<p class="definition">Definition at line <a class="el" href="index_8h_source.html#l00097">97</a> of file <a class="el" href="index_8h_source.html">index.h</a>.</p>
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<p class="reference">Referenced by <a class="el" href="close_8c_source.html#l03864">write_index_block()</a>.</p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>include/aaruformat/structs/<a class="el" href="index_8h_source.html">index.h</a></li>
</ul>
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