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<?xml version="1.0" encoding="UTF-8"?>
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    <title>dict: string dictionnary</title>
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    <h2>
      <span class="refentrytitle">dict</span>
    </h2>
    <p>dict - string dictionnary</p>
    <p>dictionary of reusable strings, just used to avoid allocation and freeing operations. </p>
    <p>Author(s): Daniel Veillard </p>
    <div class="refsynopsisdiv">
      <h2>Synopsis</h2>
      <pre class="synopsis">typedef struct _xmlDict <a href="#xmlDict">xmlDict</a>;
typedef <a href="libxml2-dict.html#xmlDict">xmlDict</a> * <a href="#xmlDictPtr">xmlDictPtr</a>;
int	<a href="#xmlDictReference">xmlDictReference</a>		(<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
void	<a href="#xmlDictCleanup">xmlDictCleanup</a>			(void);
int	<a href="#xmlDictSize">xmlDictSize</a>			(<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
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);
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);
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);
<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>	<a href="#xmlDictCreateSub">xmlDictCreateSub</a>	(<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> sub);
void	<a href="#xmlDictFree">xmlDictFree</a>			(<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
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);
<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>	<a href="#xmlDictCreate">xmlDictCreate</a>		(void);
</pre>
    </div>
    <div class="refsect1" lang="en">
      <h2>Description</h2>
    </div>
    <div class="refsect1" lang="en">
      <h2>Details</h2>
      <div class="refsect2" lang="en">
        <div class="refsect2" lang="en"><h3><a name="xmlDict">Structure </a>xmlDict</h3><pre class="programlisting">struct _xmlDict {
The content of this structure is not made public by the API.
} xmlDict;
</pre><p/>
</div>
        <hr/>
        <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;
</pre><p/>
</div>
        <hr/>
        <div class="refsect2" lang="en"><h3><a name="xmlDictCleanup"/>xmlDictCleanup ()</h3><pre class="programlisting">void	xmlDictCleanup			(void)<br/>
</pre><p>Free the dictionary mutex.</p>
</div>
        <hr/>
        <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/>
</pre><p>Create a new dictionary</p>
<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>
        <hr/>
        <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/>
</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>
<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>
        <hr/>
        <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/>
</pre><p>Check if the @name exists in the dictionnary @dict.</p>
<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>
        <hr/>
        <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/>
</pre><p>Free the hash @dict and its contents. The userdata is deallocated with @f if provided.</p>
<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>
        <hr/>
        <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/>
</pre><p>Add the @name to the dictionnary @dict if not present.</p>
<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>
        <hr/>
        <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/>
</pre><p>check if a string is owned by the disctionary</p>
<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>
        <hr/>
        <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/>
</pre><p>Add the QName @prefix:@name to the hash @dict if not present.</p>
<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>
        <hr/>
        <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/>
</pre><p>Increment the <a href="libxml2-SAX.html#reference">reference</a> counter of a dictionary</p>
<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>
        <hr/>
        <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/>
</pre><p>Query the number of elements installed in the hash @dict.</p>
<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>
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