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  35         <th width="100%" align="center">libxml2 Reference Manual</th>
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  38     <h2>
  39       <span class="refentrytitle">dict</span>
  40     </h2>
  41     <p>dict - string dictionnary</p>
  42     <p>dictionary of reusable strings, just used to avoid allocation and freeing operations. </p>
  43     <p>Author(s): Daniel Veillard </p>
  44     <div class="refsynopsisdiv">
  45       <h2>Synopsis</h2>
  46       <pre class="synopsis">typedef struct _xmlDict <a href="#xmlDict">xmlDict</a>;
  47 typedef <a href="libxml2-dict.html#xmlDict">xmlDict</a> * <a href="#xmlDictPtr">xmlDictPtr</a>;
  48 int     <a href="#xmlDictReference">xmlDictReference</a>                (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
  49 void    <a href="#xmlDictCleanup">xmlDictCleanup</a>                    (void);
  50 int     <a href="#xmlDictSize">xmlDictSize</a>                  (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
  51 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *    <a href="#xmlDictExists">xmlDictExists</a>              (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/>                                        int len);
  52 int     <a href="#xmlDictOwns">xmlDictOwns</a>                  (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * str);
  53 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *    <a href="#xmlDictQLookup">xmlDictQLookup</a>            (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/>                                      const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name);
  54 int     <a href="#xmlInitializeDict">xmlInitializeDict</a>              (void);
  55 <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>   <a href="#xmlDictCreateSub">xmlDictCreateSub</a>        (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> sub);
  56 void    <a href="#xmlDictFree">xmlDictFree</a>                  (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
  57 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *    <a href="#xmlDictLookup">xmlDictLookup</a>              (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/>                                        int len);
  58 <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>   <a href="#xmlDictCreate">xmlDictCreate</a>              (void);
  59 </pre>
  60     </div>
  61     <div class="refsect1" lang="en">
  62       <h2>Description</h2>
  63     </div>
  64     <div class="refsect1" lang="en">
  65       <h2>Details</h2>
  66       <div class="refsect2" lang="en">
  67         <div class="refsect2" lang="en"><h3><a name="xmlDict">Structure </a>xmlDict</h3><pre class="programlisting">struct _xmlDict {
  68 The content of this structure is not made public by the API.
  69 } xmlDict;
  70 </pre><p/>
  71 </div>
  72         <hr/>
  73         <div class="refsect2" lang="en"><h3><a name="xmlDictPtr">Typedef </a>xmlDictPtr</h3><pre class="programlisting"><a href="libxml2-dict.html#xmlDict">xmlDict</a> * xmlDictPtr;
  74 </pre><p/>
  75 </div>
  76         <hr/>
  77         <div class="refsect2" lang="en"><h3><a name="xmlDictCleanup"/>xmlDictCleanup ()</h3><pre class="programlisting">void    xmlDictCleanup                  (void)<br/>
  78 </pre><p>Free the dictionary mutex. Do not call unless sure the library is not in use anymore !</p>
  79 </div>
  80         <hr/>
  81         <div class="refsect2" lang="en"><h3><a name="xmlDictCreate"/>xmlDictCreate ()</h3><pre class="programlisting"><a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>     xmlDictCreate           (void)<br/>
  82 </pre><p>Create a new dictionary</p>
  83 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created dictionnary, or NULL if an error occured.</td></tr></tbody></table></div></div>
  84         <hr/>
  85         <div class="refsect2" lang="en"><h3><a name="xmlDictCreateSub"/>xmlDictCreateSub ()</h3><pre class="programlisting"><a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>       xmlDictCreateSub        (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> sub)<br/>
  86 </pre><p>Create a new dictionary, inheriting strings from the read-only dictionnary @sub. On lookup, strings are first searched in the new dictionnary, then in @sub, and if not found are created in the new dictionnary.</p>
  87 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>sub</tt></i>:</span></td><td>an existing dictionnary</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created dictionnary, or NULL if an error occured.</td></tr></tbody></table></div></div>
  88         <hr/>
  89         <div class="refsect2" lang="en"><h3><a name="xmlDictExists"/>xmlDictExists ()</h3><pre class="programlisting">const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *      xmlDictExists           (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/>                                        int len)<br/>
  90 </pre><p>Check if the @name exists in the dictionnary @dict.</p>
  91 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</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>len</tt></i>:</span></td><td>the length of the name, if -1 it is recomputed</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the internal copy of the name or NULL if not found.</td></tr></tbody></table></div></div>
  92         <hr/>
  93         <div class="refsect2" lang="en"><h3><a name="xmlDictFree"/>xmlDictFree ()</h3><pre class="programlisting">void  xmlDictFree                     (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict)<br/>
  94 </pre><p>Free the hash @dict and its contents. The userdata is deallocated with @f if provided.</p>
  95 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</td></tr></tbody></table></div></div>
  96         <hr/>
  97         <div class="refsect2" lang="en"><h3><a name="xmlDictLookup"/>xmlDictLookup ()</h3><pre class="programlisting">const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *      xmlDictLookup           (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/>                                        int len)<br/>
  98 </pre><p>Add the @name to the dictionnary @dict if not present.</p>
  99 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</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>len</tt></i>:</span></td><td>the length of the name, if -1 it is recomputed</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the internal copy of the name or NULL in case of internal error</td></tr></tbody></table></div></div>
 100         <hr/>
 101         <div class="refsect2" lang="en"><h3><a name="xmlDictOwns"/>xmlDictOwns ()</h3><pre class="programlisting">int   xmlDictOwns                     (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * str)<br/>
 102 </pre><p>check if a string is owned by the disctionary</p>
 103 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</td></tr><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the string</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if true, 0 if false and -1 in case of error -1 in case of error</td></tr></tbody></table></div></div>
 104         <hr/>
 105         <div class="refsect2" lang="en"><h3><a name="xmlDictQLookup"/>xmlDictQLookup ()</h3><pre class="programlisting">const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *    xmlDictQLookup          (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/>                                       const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * prefix, <br/>                                      const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name)<br/>
 106 </pre><p>Add the QName @prefix:@name to the hash @dict if not present.</p>
 107 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</td></tr><tr><td><span class="term"><i><tt>prefix</tt></i>:</span></td><td>the prefix</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the name</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the internal copy of the QName or NULL in case of internal error</td></tr></tbody></table></div></div>
 108         <hr/>
 109         <div class="refsect2" lang="en"><h3><a name="xmlDictReference"/>xmlDictReference ()</h3><pre class="programlisting">int xmlDictReference                (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict)<br/>
 110 </pre><p>Increment the <a href="libxml2-SAX.html#reference">reference</a> counter of a dictionary</p>
 111 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of error</td></tr></tbody></table></div></div>
 112         <hr/>
 113         <div class="refsect2" lang="en"><h3><a name="xmlDictSize"/>xmlDictSize ()</h3><pre class="programlisting">int   xmlDictSize                     (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict)<br/>
 114 </pre><p>Query the number of elements installed in the hash @dict.</p>
 115 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>the dictionnary</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of elements in the dictionnary or -1 in case of error</td></tr></tbody></table></div></div>
 116         <hr/>
 117         <div class="refsect2" lang="en"><h3><a name="xmlInitializeDict"/>xmlInitializeDict ()</h3><pre class="programlisting">int       xmlInitializeDict               (void)<br/>
 118 </pre><p>Do the dictionary mutex initialization. this function is not thread safe, initialization should preferably be done once at startup</p>
 119 <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if initialization was already done, and 1 if that call led to the initialization</td></tr></tbody></table></div></div>
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