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<center><h1>FreeType-2.5.2 API Reference</h1></center>
<center><h1>
List Processing
</h1></center>
<h2>Synopsis</h2>
<table align=center cellspacing=5 cellpadding=0 border=0>
<tr><td></td><td><a href="#FT_List">FT_List</a></td><td></td><td><a href="#FT_List_Add">FT_List_Add</a></td><td></td><td><a href="#FT_List_Iterate">FT_List_Iterate</a></td></tr>
<tr><td></td><td><a href="#FT_ListNode">FT_ListNode</a></td><td></td><td><a href="#FT_List_Insert">FT_List_Insert</a></td><td></td><td><a href="#FT_List_Destructor">FT_List_Destructor</a></td></tr>
<tr><td></td><td><a href="#FT_ListRec">FT_ListRec</a></td><td></td><td><a href="#FT_List_Remove">FT_List_Remove</a></td><td></td><td><a href="#FT_List_Finalize">FT_List_Finalize</a></td></tr>
<tr><td></td><td><a href="#FT_ListNodeRec">FT_ListNodeRec</a></td><td></td><td><a href="#FT_List_Up">FT_List_Up</a></td><td></td><td></td></tr>
<tr><td></td><td><a href="#FT_List_Find">FT_List_Find</a></td><td></td><td><a href="#FT_List_Iterator">FT_List_Iterator</a></td><td></td><td></td></tr>
</table><br><br>
<table align=center width="87%"><tr><td>
<p>This section contains various definitions related to list processing using doubly-linked nodes.</p>
</td></tr></table><br>
<table align=center width="75%"><tr><td>
<h4><a name="FT_List">FT_List</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_TYPES_H (fttypes.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListRec_* <b>FT_List</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A handle to a list record (see <a href="ft2-list_processing.html#FT_ListRec">FT_ListRec</a>).</p>
</td></tr></table><br>
</td></tr></table>
<hr width="75%">
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<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<table align=center width="75%"><tr><td>
<h4><a name="FT_ListNode">FT_ListNode</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_TYPES_H (fttypes.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListNodeRec_* <b>FT_ListNode</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Many elements and objects in FreeType are listed through an <a href="ft2-list_processing.html#FT_List">FT_List</a> record (see <a href="ft2-list_processing.html#FT_ListRec">FT_ListRec</a>). As its name suggests, an FT_ListNode is a handle to a single list element.</p>
</td></tr></table><br>
</td></tr></table>
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<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<table align=center width="75%"><tr><td>
<h4><a name="FT_ListRec">FT_ListRec</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_TYPES_H (fttypes.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListRec_
{
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> head;
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> tail;
} <b>FT_ListRec</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A structure used to hold a simple doubly-linked list. These are used in many parts of FreeType.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>head</b></td><td>
<p>The head (first element) of doubly-linked list.</p>
</td></tr>
<tr valign=top><td><b>tail</b></td><td>
<p>The tail (last element) of doubly-linked list.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
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<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<table align=center width="75%"><tr><td>
<h4><a name="FT_ListNodeRec">FT_ListNodeRec</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_TYPES_H (fttypes.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListNodeRec_
{
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> prev;
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> next;
<span class="keyword">void</span>* data;
} <b>FT_ListNodeRec</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A structure used to hold a single list element.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>prev</b></td><td>
<p>The previous element in the list. NULL if first.</p>
</td></tr>
<tr valign=top><td><b>next</b></td><td>
<p>The next element in the list. NULL if last.</p>
</td></tr>
<tr valign=top><td><b>data</b></td><td>
<p>A typeless pointer to the listed object.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Find">FT_List_Find</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> )
<b>FT_List_Find</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<span class="keyword">void</span>* data );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Find the list node for a given listed object.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A pointer to the parent list.</p>
</td></tr>
<tr valign=top><td><b>data</b></td><td>
<p>The address of the listed object.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
<p>List node. NULL if it wasn't found.</p>
</td></tr></table>
</td></tr></table>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Add">FT_List_Add</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Add</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Append an element to the end of a list.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A pointer to the parent list.</p>
</td></tr>
<tr valign=top><td><b>node</b></td><td>
<p>The node to append.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
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<td width="100%"></td>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Insert">FT_List_Insert</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Insert</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Insert an element at the head of a list.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A pointer to parent list.</p>
</td></tr>
<tr valign=top><td><b>node</b></td><td>
<p>The node to insert.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Remove">FT_List_Remove</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Remove</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Remove a node from a list. This function doesn't check whether the node is in the list!</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>node</b></td><td>
<p>The node to remove.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A pointer to the parent list.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Up">FT_List_Up</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Up</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Move a node to the head/top of a list. Used to maintain LRU lists.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A pointer to the parent list.</p>
</td></tr>
<tr valign=top><td><b>node</b></td><td>
<p>The node to move.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Iterator">FT_List_Iterator</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Error">FT_Error</a>
(*<b>FT_List_Iterator</b>)( <a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node,
<span class="keyword">void</span>* user );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>An FT_List iterator function that is called during a list parse by <a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a>.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>node</b></td><td>
<p>The current iteration list node.</p>
</td></tr>
<tr valign=top><td><b>user</b></td><td>
<p>A typeless pointer passed to <a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a>. Can be used to point to the iteration's state.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Iterate">FT_List_Iterate</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_List_Iterate</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_List_Iterator">FT_List_Iterator</a> iterator,
<span class="keyword">void</span>* user );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Parse a list and calls a given iterator function on each element. Note that parsing is stopped as soon as one of the iterator calls returns a non-zero value.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A handle to the list.</p>
</td></tr>
<tr valign=top><td><b>iterator</b></td><td>
<p>An iterator function, called on each node of the list.</p>
</td></tr>
<tr valign=top><td><b>user</b></td><td>
<p>A user-supplied field that is passed as the second argument to the iterator.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
<p>The result (a FreeType error code) of the last iterator call.</p>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Destructor">FT_List_Destructor</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_List_Destructor</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">void</span>* data,
<span class="keyword">void</span>* user );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>An <a href="ft2-list_processing.html#FT_List">FT_List</a> iterator function that is called during a list finalization by <a href="ft2-list_processing.html#FT_List_Finalize">FT_List_Finalize</a> to destroy all elements in a given list.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>system</b></td><td>
<p>The current system object.</p>
</td></tr>
<tr valign=top><td><b>data</b></td><td>
<p>The current object to destroy.</p>
</td></tr>
<tr valign=top><td><b>user</b></td><td>
<p>A typeless pointer passed to <a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a>. It can be used to point to the iteration's state.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<table align=center width="75%"><tr><td>
<h4><a name="FT_List_Finalize">FT_List_Finalize</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_LIST_H (ftlist.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Finalize</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_List_Destructor">FT_List_Destructor</a> destroy,
<a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">void</span>* user );
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<table align=center width="87%"><tr><td>
<p>Destroy all elements in the list as well as the list itself.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>list</b></td><td>
<p>A handle to the list.</p>
</td></tr>
<tr valign=top><td><b>destroy</b></td><td>
<p>A list destructor that will be applied to each element of the list.</p>
</td></tr>
<tr valign=top><td><b>memory</b></td><td>
<p>The current memory object that handles deallocation.</p>
</td></tr>
<tr valign=top><td><b>user</b></td><td>
<p>A user-supplied field that is passed as the last argument to the destructor.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>This function expects that all nodes added by <a href="ft2-list_processing.html#FT_List_Add">FT_List_Add</a> or <a href="ft2-list_processing.html#FT_List_Insert">FT_List_Insert</a> have been dynamically allocated.</p>
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</td></tr></table>
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