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<h2>
<span class="refentrytitle">dict</span>
</h2>
<p>dict - string dictionary</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>;
size_t <a href="#xmlDictGetUsage">xmlDictGetUsage</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
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);
size_t <a href="#xmlDictSetLimit">xmlDictSetLimit</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/> size_t limit);
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);
int <a href="#xmlInitializeDict">xmlInitializeDict</a> (void);
<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. Do not call unless sure the library is not in use anymore !</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 dictionary, or NULL if an error occurred.</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 dictionary @sub. On lookup, strings are first searched in the new dictionary, then in @sub, and if not found are created in the new dictionary.</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 dictionary</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created dictionary, or NULL if an error occurred.</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 dictionary @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 dictionary</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 dictionary</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlDictGetUsage"/>xmlDictGetUsage ()</h3><pre class="programlisting">size_t xmlDictGetUsage (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict)<br/>
</pre><p>Get how much memory is used by a dictionary for strings Added in 2.9.0</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 dictionary</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the amount of strings allocated</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 dictionary @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 dictionary</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 dictionary</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 dictionary</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 dictionary</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="xmlDictSetLimit"/>xmlDictSetLimit ()</h3><pre class="programlisting">size_t xmlDictSetLimit (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/> size_t limit)<br/>
</pre><p>Set a size limit for the dictionary Added in 2.9.0</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 dictionary</td></tr><tr><td><span class="term"><i><tt>limit</tt></i>:</span></td><td>the limit in bytes</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the previous limit of the dictionary or 0</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 dictionary</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of elements in the dictionary or -1 in case of error</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlInitializeDict"/>xmlInitializeDict ()</h3><pre class="programlisting">int xmlInitializeDict (void)<br/>
</pre><p>Do the dictionary mutex initialization. this function is deprecated</p>
<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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