1<?xml version="1.0" encoding="UTF-8"?> 2<html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 5 <title>hash: Chained hash tables</title> 6 <meta name="generator" content="Libxml2 devhelp stylesheet"/> 7 <link rel="start" href="index.html" title="libxml2 Reference Manual"/> 8 <link rel="up" href="general.html" title="API"/> 9 <link rel="stylesheet" href="style.css" type="text/css"/> 10 <link rel="chapter" href="general.html" title="API"/> 11 </head> 12 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13 <table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"> 14 <tr valign="middle"> 15 <td> 16 <a accesskey="p" href="libxml2-globals.html"> 17 <img src="left.png" width="24" height="24" border="0" alt="Prev"/> 18 </a> 19 </td> 20 <td> 21 <a accesskey="u" href="general.html"> 22 <img src="up.png" width="24" height="24" border="0" alt="Up"/> 23 </a> 24 </td> 25 <td> 26 <a accesskey="h" href="index.html"> 27 <img src="home.png" width="24" height="24" border="0" alt="Home"/> 28 </a> 29 </td> 30 <td> 31 <a accesskey="n" href="libxml2-list.html"> 32 <img src="right.png" width="24" height="24" border="0" alt="Next"/> 33 </a> 34 </td> 35 <th width="100%" align="center">libxml2 Reference Manual</th> 36 </tr> 37 </table> 38 <h2> 39 <span class="refentrytitle">hash</span> 40 </h2> 41 <p>hash - Chained hash tables</p> 42 <p>This module implements the hash table support used in various places in the library. </p> 43 <p>Author(s): Bjorn Reese <bjorn.reese@systematic.dk> </p> 44 <div class="refsynopsisdiv"> 45 <h2>Synopsis</h2> 46 <pre class="synopsis">#define <a href="#XML_CAST_FPTR">XML_CAST_FPTR</a>(fptr); 47typedef struct _xmlHashTable <a href="#xmlHashTable">xmlHashTable</a>; 48typedef <a href="libxml2-hash.html#xmlHashTable">xmlHashTable</a> * <a href="#xmlHashTablePtr">xmlHashTablePtr</a>; 49void <a href="#xmlHashScanFull">xmlHashScanFull</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashScannerFull">xmlHashScannerFull</a> f, <br/> void * data); 50void <a href="#xmlHashScan">xmlHashScan</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashScanner">xmlHashScanner</a> f, <br/> void * data); 51typedef void <a href="#xmlHashScannerFull">xmlHashScannerFull</a> (void * payload, <br/> void * data, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3); 52<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> <a href="#xmlHashCreateDict">xmlHashCreateDict</a> (int size, <br/> <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict); 53int <a href="#xmlHashAddEntry">xmlHashAddEntry</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> void * userdata); 54int <a href="#xmlHashUpdateEntry">xmlHashUpdateEntry</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> void * userdata, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 55void * <a href="#xmlHashQLookup3">xmlHashQLookup3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix3, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3); 56void * <a href="#xmlHashQLookup2">xmlHashQLookup2</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2); 57void <a href="#xmlHashScan3">xmlHashScan3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> <a href="libxml2-hash.html#xmlHashScanner">xmlHashScanner</a> f, <br/> void * data); 58typedef void <a href="#xmlHashScanner">xmlHashScanner</a> (void * payload, <br/> void * data, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name); 59typedef void <a href="#xmlHashDeallocator">xmlHashDeallocator</a> (void * payload, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name); 60<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> <a href="#xmlHashCreate">xmlHashCreate</a> (int size); 61void <a href="#xmlHashFree">xmlHashFree</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 62void * <a href="#xmlHashLookup">xmlHashLookup</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name); 63void * <a href="#xmlHashQLookup">xmlHashQLookup</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name); 64int <a href="#xmlHashUpdateEntry2">xmlHashUpdateEntry2</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> void * userdata, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 65int <a href="#xmlHashRemoveEntry2">xmlHashRemoveEntry2</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 66int <a href="#xmlHashRemoveEntry3">xmlHashRemoveEntry3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 67<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> <a href="#xmlHashCopy">xmlHashCopy</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashCopier">xmlHashCopier</a> f); 68void <a href="#xmlHashScanFull3">xmlHashScanFull3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> <a href="libxml2-hash.html#xmlHashScannerFull">xmlHashScannerFull</a> f, <br/> void * data); 69int <a href="#xmlHashUpdateEntry3">xmlHashUpdateEntry3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> void * userdata, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 70void * <a href="#xmlHashLookup3">xmlHashLookup3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3); 71void * <a href="#xmlHashLookup2">xmlHashLookup2</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2); 72int <a href="#xmlHashRemoveEntry">xmlHashRemoveEntry</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f); 73typedef void * <a href="#xmlHashCopier">xmlHashCopier</a> (void * payload, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name); 74int <a href="#xmlHashAddEntry2">xmlHashAddEntry2</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> void * userdata); 75int <a href="#xmlHashAddEntry3">xmlHashAddEntry3</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> void * userdata); 76int <a href="#xmlHashSize">xmlHashSize</a> (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table); 77</pre> 78 </div> 79 <div class="refsect1" lang="en"> 80 <h2>Description</h2> 81 </div> 82 <div class="refsect1" lang="en"> 83 <h2>Details</h2> 84 <div class="refsect2" lang="en"> 85 <div class="refsect2" lang="en"><h3><a name="XML_CAST_FPTR">Macro </a>XML_CAST_FPTR</h3><pre class="programlisting">#define <a href="#XML_CAST_FPTR">XML_CAST_FPTR</a>(fptr); 86</pre><p>Macro to do a casting from an object pointer to a function pointer without encountering a warning from gcc #define XML_CAST_FPTR(fptr) (*(void **)(&fptr)) This macro violated ISO C aliasing rules (gcc4 on s390 broke) so it is disabled now</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>fptr</tt></i>:</span></td><td>pointer to a function</td></tr></tbody></table></div> 87</div> 88 <hr/> 89 <div class="refsect2" lang="en"><h3><a name="xmlHashTable">Structure </a>xmlHashTable</h3><pre class="programlisting">struct _xmlHashTable { 90The content of this structure is not made public by the API. 91} xmlHashTable; 92</pre><p/> 93</div> 94 <hr/> 95 <div class="refsect2" lang="en"><h3><a name="xmlHashTablePtr">Typedef </a>xmlHashTablePtr</h3><pre class="programlisting"><a href="libxml2-hash.html#xmlHashTable">xmlHashTable</a> * xmlHashTablePtr; 96</pre><p/> 97</div> 98 <hr/> 99 <div class="refsect2" lang="en"><h3><a name="xmlHashCopier"/>Function type xmlHashCopier</h3><pre class="programlisting">void * xmlHashCopier (void * payload, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name)<br/> 100</pre><p>Callback to copy data from a hash.</p> 101<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>payload</tt></i>:</span></td><td>the data in the hash</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name associated</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a copy of the data or NULL in case of error.</td></tr></tbody></table></div></div> 102 <hr/> 103 <div class="refsect2" lang="en"><h3><a name="xmlHashDeallocator"/>Function type xmlHashDeallocator</h3><pre class="programlisting">void xmlHashDeallocator (void * payload, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name)<br/> 104</pre><p>Callback to free data from a hash.</p> 105<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>payload</tt></i>:</span></td><td>the data in the hash</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name associated</td></tr></tbody></table></div></div> 106 <hr/> 107 <div class="refsect2" lang="en"><h3><a name="xmlHashScanner"/>Function type xmlHashScanner</h3><pre class="programlisting">void xmlHashScanner (void * payload, <br/> void * data, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name)<br/> 108</pre><p>Callback when scanning data in a hash with the simple scanner.</p> 109<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>payload</tt></i>:</span></td><td>the data in the hash</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>extra scannner data</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name associated</td></tr></tbody></table></div></div> 110 <hr/> 111 <div class="refsect2" lang="en"><h3><a name="xmlHashScannerFull"/>Function type xmlHashScannerFull</h3><pre class="programlisting">void xmlHashScannerFull (void * payload, <br/> void * data, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3)<br/> 112</pre><p>Callback when scanning data in a hash with the full scanner.</p> 113<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>payload</tt></i>:</span></td><td>the data in the hash</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>extra scannner data</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name associated</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>the second name associated</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>the third name associated</td></tr></tbody></table></div></div> 114 <hr/> 115 <div class="refsect2" lang="en"><h3><a name="xmlHashAddEntry"/>xmlHashAddEntry ()</h3><pre class="programlisting">int xmlHashAddEntry (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> void * userdata)<br/> 116</pre><p>Add the @userdata to the hash @table. This can later be retrieved by using the @name. Duplicate names generate errors.</p> 117<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>userdata</tt></i>:</span></td><td>a pointer to the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 the addition succeeded and -1 in case of error.</td></tr></tbody></table></div></div> 118 <hr/> 119 <div class="refsect2" lang="en"><h3><a name="xmlHashAddEntry2"/>xmlHashAddEntry2 ()</h3><pre class="programlisting">int xmlHashAddEntry2 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> void * userdata)<br/> 120</pre><p>Add the @userdata to the hash @table. This can later be retrieved by using the (@name, @name2) tuple. Duplicate tuples generate errors.</p> 121<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>userdata</tt></i>:</span></td><td>a pointer to the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 the addition succeeded and -1 in case of error.</td></tr></tbody></table></div></div> 122 <hr/> 123 <div class="refsect2" lang="en"><h3><a name="xmlHashAddEntry3"/>xmlHashAddEntry3 ()</h3><pre class="programlisting">int xmlHashAddEntry3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> void * userdata)<br/> 124</pre><p>Add the @userdata to the hash @table. This can later be retrieved by using the tuple (@name, @name2, @name3). Duplicate entries generate errors.</p> 125<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata</td></tr><tr><td><span class="term"><i><tt>userdata</tt></i>:</span></td><td>a pointer to the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 the addition succeeded and -1 in case of error.</td></tr></tbody></table></div></div> 126 <hr/> 127 <div class="refsect2" lang="en"><h3><a name="xmlHashCopy"/>xmlHashCopy ()</h3><pre class="programlisting"><a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> xmlHashCopy (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashCopier">xmlHashCopier</a> f)<br/> 128</pre><p>Scan the hash @table and applied @f to each value.</p> 129<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the copier function for items in the hash</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new table or NULL in case of error.</td></tr></tbody></table></div></div> 130 <hr/> 131 <div class="refsect2" lang="en"><h3><a name="xmlHashCreate"/>xmlHashCreate ()</h3><pre class="programlisting"><a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> xmlHashCreate (int size)<br/> 132</pre><p>Create a new xmlHashTablePtr.</p> 133<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>the size of the hash table</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object, or NULL if an error occured.</td></tr></tbody></table></div></div> 134 <hr/> 135 <div class="refsect2" lang="en"><h3><a name="xmlHashCreateDict"/>xmlHashCreateDict ()</h3><pre class="programlisting"><a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> xmlHashCreateDict (int size, <br/> <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict)<br/> 136</pre><p>Create a new <a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> which will use @dict as the internal dictionary</p> 137<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>size</tt></i>:</span></td><td>the size of the hash table</td></tr><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>a dictionary to use for the hash</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object, or NULL if an error occured.</td></tr></tbody></table></div></div> 138 <hr/> 139 <div class="refsect2" lang="en"><h3><a name="xmlHashFree"/>xmlHashFree ()</h3><pre class="programlisting">void xmlHashFree (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 140</pre><p>Free the hash @table and its contents. The userdata is deallocated with @f if provided.</p> 141<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for items in the hash</td></tr></tbody></table></div></div> 142 <hr/> 143 <div class="refsect2" lang="en"><h3><a name="xmlHashLookup"/>xmlHashLookup ()</h3><pre class="programlisting">void * xmlHashLookup (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name)<br/> 144</pre><p>Find the userdata specified by the @name.</p> 145<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the pointer to the userdata</td></tr></tbody></table></div></div> 146 <hr/> 147 <div class="refsect2" lang="en"><h3><a name="xmlHashLookup2"/>xmlHashLookup2 ()</h3><pre class="programlisting">void * xmlHashLookup2 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2)<br/> 148</pre><p>Find the userdata specified by the (@name, @name2) tuple.</p> 149<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the pointer to the userdata</td></tr></tbody></table></div></div> 150 <hr/> 151 <div class="refsect2" lang="en"><h3><a name="xmlHashLookup3"/>xmlHashLookup3 ()</h3><pre class="programlisting">void * xmlHashLookup3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3)<br/> 152</pre><p>Find the userdata specified by the (@name, @name2, @name3) tuple.</p> 153<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the a pointer to the userdata</td></tr></tbody></table></div></div> 154 <hr/> 155 <div class="refsect2" lang="en"><h3><a name="xmlHashQLookup"/>xmlHashQLookup ()</h3><pre class="programlisting">void * xmlHashQLookup (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name)<br/> 156</pre><p>Find the userdata specified by the QName @prefix:@name/@name.</p> 157<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>prefix</tt></i>:</span></td><td>the prefix of the userdata</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the pointer to the userdata</td></tr></tbody></table></div></div> 158 <hr/> 159 <div class="refsect2" lang="en"><h3><a name="xmlHashQLookup2"/>xmlHashQLookup2 ()</h3><pre class="programlisting">void * xmlHashQLookup2 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2)<br/> 160</pre><p>Find the userdata specified by the QNames tuple</p> 161<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>prefix</tt></i>:</span></td><td>the prefix of the userdata</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>prefix2</tt></i>:</span></td><td>the second prefix of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the pointer to the userdata</td></tr></tbody></table></div></div> 162 <hr/> 163 <div class="refsect2" lang="en"><h3><a name="xmlHashQLookup3"/>xmlHashQLookup3 ()</h3><pre class="programlisting">void * xmlHashQLookup3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix3, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3)<br/> 164</pre><p>Find the userdata specified by the (@name, @name2, @name3) tuple.</p> 165<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>prefix</tt></i>:</span></td><td>the prefix of the userdata</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>prefix2</tt></i>:</span></td><td>the second prefix of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>prefix3</tt></i>:</span></td><td>the third prefix of the userdata</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the a pointer to the userdata</td></tr></tbody></table></div></div> 166 <hr/> 167 <div class="refsect2" lang="en"><h3><a name="xmlHashRemoveEntry"/>xmlHashRemoveEntry ()</h3><pre class="programlisting">int xmlHashRemoveEntry (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 168</pre><p>Find the userdata specified by the @name and remove it from the hash @table. Existing userdata for this tuple will be removed and freed with @f.</p> 169<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for removed item (if any)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if the removal succeeded and -1 in case of error or not found.</td></tr></tbody></table></div></div> 170 <hr/> 171 <div class="refsect2" lang="en"><h3><a name="xmlHashRemoveEntry2"/>xmlHashRemoveEntry2 ()</h3><pre class="programlisting">int xmlHashRemoveEntry2 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 172</pre><p>Find the userdata specified by the (@name, @name2) tuple and remove it from the hash @table. Existing userdata for this tuple will be removed and freed with @f.</p> 173<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for removed item (if any)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if the removal succeeded and -1 in case of error or not found.</td></tr></tbody></table></div></div> 174 <hr/> 175 <div class="refsect2" lang="en"><h3><a name="xmlHashRemoveEntry3"/>xmlHashRemoveEntry3 ()</h3><pre class="programlisting">int xmlHashRemoveEntry3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 176</pre><p>Find the userdata specified by the (@name, @name2, @name3) tuple and remove it from the hash @table. Existing userdata for this tuple will be removed and freed with @f.</p> 177<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for removed item (if any)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if the removal succeeded and -1 in case of error or not found.</td></tr></tbody></table></div></div> 178 <hr/> 179 <div class="refsect2" lang="en"><h3><a name="xmlHashScan"/>xmlHashScan ()</h3><pre class="programlisting">void xmlHashScan (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashScanner">xmlHashScanner</a> f, <br/> void * data)<br/> 180</pre><p>Scan the hash @table and applied @f to each value.</p> 181<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the scanner function for items in the hash</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>extra data passed to f</td></tr></tbody></table></div></div> 182 <hr/> 183 <div class="refsect2" lang="en"><h3><a name="xmlHashScan3"/>xmlHashScan3 ()</h3><pre class="programlisting">void xmlHashScan3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> <a href="libxml2-hash.html#xmlHashScanner">xmlHashScanner</a> f, <br/> void * data)<br/> 184</pre><p>Scan the hash @table and applied @f to each value matching (@name, @name2, @name3) tuple. If one of the names is null, the comparison is considered to match.</p> 185<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata or NULL</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata or NULL</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata or NULL</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the scanner function for items in the hash</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>extra data passed to f</td></tr></tbody></table></div></div> 186 <hr/> 187 <div class="refsect2" lang="en"><h3><a name="xmlHashScanFull"/>xmlHashScanFull ()</h3><pre class="programlisting">void xmlHashScanFull (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> <a href="libxml2-hash.html#xmlHashScannerFull">xmlHashScannerFull</a> f, <br/> void * data)<br/> 188</pre><p>Scan the hash @table and applied @f to each value.</p> 189<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the scanner function for items in the hash</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>extra data passed to f</td></tr></tbody></table></div></div> 190 <hr/> 191 <div class="refsect2" lang="en"><h3><a name="xmlHashScanFull3"/>xmlHashScanFull3 ()</h3><pre class="programlisting">void xmlHashScanFull3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> <a href="libxml2-hash.html#xmlHashScannerFull">xmlHashScannerFull</a> f, <br/> void * data)<br/> 192</pre><p>Scan the hash @table and applied @f to each value matching (@name, @name2, @name3) tuple. If one of the names is null, the comparison is considered to match.</p> 193<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata or NULL</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata or NULL</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata or NULL</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the scanner function for items in the hash</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>extra data passed to f</td></tr></tbody></table></div></div> 194 <hr/> 195 <div class="refsect2" lang="en"><h3><a name="xmlHashSize"/>xmlHashSize ()</h3><pre class="programlisting">int xmlHashSize (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table)<br/> 196</pre><p>Query the number of elements installed in the hash @table.</p> 197<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of elements in the hash table or -1 in case of error</td></tr></tbody></table></div></div> 198 <hr/> 199 <div class="refsect2" lang="en"><h3><a name="xmlHashUpdateEntry"/>xmlHashUpdateEntry ()</h3><pre class="programlisting">int xmlHashUpdateEntry (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> void * userdata, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 200</pre><p>Add the @userdata to the hash @table. This can later be retrieved by using the @name. Existing entry for this @name will be removed and freed with @f if found.</p> 201<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>userdata</tt></i>:</span></td><td>a pointer to the userdata</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for replaced item (if any)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 the addition succeeded and -1 in case of error.</td></tr></tbody></table></div></div> 202 <hr/> 203 <div class="refsect2" lang="en"><h3><a name="xmlHashUpdateEntry2"/>xmlHashUpdateEntry2 ()</h3><pre class="programlisting">int xmlHashUpdateEntry2 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> void * userdata, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 204</pre><p>Add the @userdata to the hash @table. This can later be retrieved by using the (@name, @name2) tuple. Existing entry for this tuple will be removed and freed with @f if found.</p> 205<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>userdata</tt></i>:</span></td><td>a pointer to the userdata</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for replaced item (if any)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 the addition succeeded and -1 in case of error.</td></tr></tbody></table></div></div> 206 <hr/> 207 <div class="refsect2" lang="en"><h3><a name="xmlHashUpdateEntry3"/>xmlHashUpdateEntry3 ()</h3><pre class="programlisting">int xmlHashUpdateEntry3 (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name2, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name3, <br/> void * userdata, <br/> <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f)<br/> 208</pre><p>Add the @userdata to the hash @table. This can later be retrieved by using the tuple (@name, @name2, @name3). Existing entry for this tuple will be removed and freed with @f if found.</p> 209<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>table</tt></i>:</span></td><td>the hash table</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name of the userdata</td></tr><tr><td><span class="term"><i><tt>name2</tt></i>:</span></td><td>a second name of the userdata</td></tr><tr><td><span class="term"><i><tt>name3</tt></i>:</span></td><td>a third name of the userdata</td></tr><tr><td><span class="term"><i><tt>userdata</tt></i>:</span></td><td>a pointer to the userdata</td></tr><tr><td><span class="term"><i><tt>f</tt></i>:</span></td><td>the deallocator function for replaced item (if any)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 the addition succeeded and -1 in case of error.</td></tr></tbody></table></div></div> 210 <hr/> 211 </div> 212 </div> 213 </body> 214</html> 215
