libxml2-dict.html
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>dict: string dictionary</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-debugXML.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-encoding.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">dict</span> 40 </h2> 41 <p>dict - string dictionary</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 size_t <a href="#xmlDictGetUsage">xmlDictGetUsage</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict); 49 int <a href="#xmlDictReference">xmlDictReference</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict); 50 void <a href="#xmlDictCleanup">xmlDictCleanup</a> (void); 51 int <a href="#xmlDictSize">xmlDictSize</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict); 52 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); 53 size_t <a href="#xmlDictSetLimit">xmlDictSetLimit</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict, <br/> size_t limit); 54 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); 55 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); 56 int <a href="#xmlInitializeDict">xmlInitializeDict</a> (void); 57 <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> <a href="#xmlDictCreateSub">xmlDictCreateSub</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> sub); 58 void <a href="#xmlDictFree">xmlDictFree</a> (<a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict); 59 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); 60 <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> <a href="#xmlDictCreate">xmlDictCreate</a> (void); 61 </pre> 62 </div> 63 <div class="refsect1" lang="en"> 64 <h2>Description</h2> 65 </div> 66 <div class="refsect1" lang="en"> 67 <h2>Details</h2> 68 <div class="refsect2" lang="en"> 69 <div class="refsect2" lang="en"><h3><a name="xmlDict">Structure </a>xmlDict</h3><pre class="programlisting">struct _xmlDict { 70 The content of this structure is not made public by the API. 71 } xmlDict; 72 </pre><p/> 73 </div> 74 <hr/> 75 <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; 76 </pre><p/> 77 </div> 78 <hr/> 79 <div class="refsect2" lang="en"><h3><a name="xmlDictCleanup"/>xmlDictCleanup ()</h3><pre class="programlisting">void xmlDictCleanup (void)<br/> 80 </pre><p>Free the dictionary mutex. Do not call unless sure the library is not in use anymore !</p> 81 </div> 82 <hr/> 83 <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/> 84 </pre><p>Create a new dictionary</p> 85 <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 occured.</td></tr></tbody></table></div></div> 86 <hr/> 87 <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/> 88 </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> 89 <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 occured.</td></tr></tbody></table></div></div> 90 <hr/> 91 <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/> 92 </pre><p>Check if the @name exists in the dictionary @dict.</p> 93 <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> 94 <hr/> 95 <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/> 96 </pre><p>Free the hash @dict and its contents. The userdata is deallocated with @f if provided.</p> 97 <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> 98 <hr/> 99 <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/> 100 </pre><p>Get how much memory is used by a dictionary for strings Added in 2.9.0</p> 101 <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> 102 <hr/> 103 <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/> 104 </pre><p>Add the @name to the dictionary @dict if not present.</p> 105 <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> 106 <hr/> 107 <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/> 108 </pre><p>check if a string is owned by the disctionary</p> 109 <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> 110 <hr/> 111 <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/> 112 </pre><p>Add the QName @prefix:@name to the hash @dict if not present.</p> 113 <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> 114 <hr/> 115 <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/> 116 </pre><p>Increment the <a href="libxml2-SAX.html#reference">reference</a> counter of a dictionary</p> 117 <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> 118 <hr/> 119 <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/> 120 </pre><p>Set a size limit for the dictionary Added in 2.9.0</p> 121 <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> 122 <hr/> 123 <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/> 124 </pre><p>Query the number of elements installed in the hash @dict.</p> 125 <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> 126 <hr/> 127 <div class="refsect2" lang="en"><h3><a name="xmlInitializeDict"/>xmlInitializeDict ()</h3><pre class="programlisting">int xmlInitializeDict (void)<br/> 128 </pre><p>Do the dictionary mutex initialization. this function is deprecated</p> 129 <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> 130 <hr/> 131 </div> 132 </div> 133 </body> 134 </html>