doc/devhelp/libxml2-hash.html

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  35         <th width="100%" align="center">libxml2 Reference Manual</th>
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  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 &lt;bjorn.reese@systematic.dk&gt; </p>
  44     <div class="refsynopsisdiv">
  45       <h2>Synopsis</h2>
  46       <pre class="synopsis">#define <a href="#XML_CAST_FPTR">XML_CAST_FPTR</a>(fptr);
  47 typedef struct _xmlHashTable <a href="#xmlHashTable">xmlHashTable</a>;
  48 typedef <a href="libxml2-hash.html#xmlHashTable">xmlHashTable</a> * <a href="#xmlHashTablePtr">xmlHashTablePtr</a>;
  49 void    <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);
  50 void    <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);
  51 typedef 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);
  53 int     <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);
  54 int     <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);
  55 void *  <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);
  56 void *  <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);
  57 void    <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);
  58 typedef void <a href="#xmlHashScanner">xmlHashScanner</a>                       (void * payload, <br/>                                   void * data, <br/>                                      <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name);
  59 typedef 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);
  61 void    <a href="#xmlHashFree">xmlHashFree</a>                  (<a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> table, <br/>                                    <a href="libxml2-hash.html#xmlHashDeallocator">xmlHashDeallocator</a> f);
  62 void *  <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);
  63 void *  <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);
  64 int     <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);
  65 int     <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);
  66 int     <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);
  68 void    <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);
  69 int     <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);
  70 void *  <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);
  71 void *  <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);
  72 int     <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);
  73 typedef void * <a href="#xmlHashCopier">xmlHashCopier</a>                       (void * payload, <br/>                                   <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name);
  74 int     <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);
  75 int     <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);
  76 int     <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 **)(&amp;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 {
  90 The 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>