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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>GcrComparable: Gcr Library Reference Manual</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#GcrComparable.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
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                  <a href="#GcrComparable.implementations" class="shortcut">Known Implementations</a></span>
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<div class="refentry">
<a name="GcrComparable"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GcrComparable.top_of_page"></a>GcrComparable</span></h2>
<p>GcrComparable — Interface for comparing objects</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GcrComparable.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
</td>
<td class="function_name">
<a class="link" href="GcrComparable.html#gcr-comparable-compare" title="gcr_comparable_compare ()">gcr_comparable_compare</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
</td>
<td class="function_name">
<a class="link" href="GcrComparable.html#gcr-comparable-memcmp" title="gcr_comparable_memcmp ()">gcr_comparable_memcmp</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GcrComparable.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="GcrComparable.html#GcrComparable-struct" title="GcrComparable">GcrComparable</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GcrComparable.html#GcrComparableIface" title="struct GcrComparableIface">GcrComparableIface</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GcrComparable.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/GTypeModule.html">GInterface</a>
    <span class="lineart">╰──</span> GcrComparable
</pre>
</div>
<div class="refsect1">
<a name="GcrComparable.prerequisites"></a><h2>Prerequisites</h2>
<p>
GcrComparable requires
 <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>.</p>
</div>
<div class="refsect1">
<a name="GcrComparable.derived-interfaces"></a><h2>Known Derived Interfaces</h2>
<p>
GcrComparable is required by
 <a class="link" href="GcrCertificate.html" title="GcrCertificate">GcrCertificate</a>.</p>
</div>
<div class="refsect1">
<a name="GcrComparable.implementations"></a><h2>Known Implementations</h2>
<p>
GcrComparable is implemented by
 <a class="link" href="GcrCertificateWidget.html#GcrCertificateRenderer">GcrCertificateRenderer</a>,  <a class="link" href="GcrPkcs11Certificate.html" title="GcrPkcs11Certificate">GcrPkcs11Certificate</a> and  <a class="link" href="GcrSimpleCertificate.html" title="GcrSimpleCertificate">GcrSimpleCertificate</a>.</p>
</div>
<div class="refsect1">
<a name="GcrComparable.description"></a><h2>Description</h2>
<p>The <a class="link" href="GcrComparable.html" title="GcrComparable"><span class="type">GcrComparable</span></a> interface is implemented by objects when they should be
comparable against one another.</p>
</div>
<div class="refsect1">
<a name="GcrComparable.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gcr-comparable-compare"></a><h3>gcr_comparable_compare ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
gcr_comparable_compare (<em class="parameter"><code><a class="link" href="GcrComparable.html" title="GcrComparable"><span class="type">GcrComparable</span></a> *self</code></em>,
                        <em class="parameter"><code><a class="link" href="GcrComparable.html" title="GcrComparable"><span class="type">GcrComparable</span></a> *other</code></em>);</pre>
<p>Compare whether two objects represent the same thing. The return value can
also be used to sort the objects.</p>
<div class="refsect3">
<a name="gcr-comparable-compare.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>The comparable object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>other</p></td>
<td class="parameter_description"><p> Another comparable object. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gcr-comparable-compare.returns"></a><h4>Returns</h4>
<p> Zero if the two objects represent the same thing, non-zero if not.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gcr-comparable-memcmp"></a><h3>gcr_comparable_memcmp ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
gcr_comparable_memcmp (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> mem1</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size1</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> mem2</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size2</code></em>);</pre>
<p>Compare two blocks of memory. The return value can be used to sort
the blocks of memory.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="gcr-comparable-memcmp.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>mem1</p></td>
<td class="parameter_description"><p> First block of memory. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size1][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size1</p></td>
<td class="parameter_description"><p>Length of first block</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mem2</p></td>
<td class="parameter_description"><p> Second block of memory. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size2][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size2</p></td>
<td class="parameter_description"><p>Length of second block</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gcr-comparable-memcmp.returns"></a><h4>Returns</h4>
<p> Zero if the blocks are identical, negative if first
less than secend, possitive otherwise.</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="GcrComparable.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GcrComparable-struct"></a><h3>GcrComparable</h3>
<pre class="programlisting">typedef struct _GcrComparable GcrComparable;</pre>
<p>The <a class="link" href="GcrComparable.html" title="GcrComparable"><span class="type">GcrComparable</span></a> interface is implemented by comparable objects.</p>
</div>
<hr>
<div class="refsect2">
<a name="GcrComparableIface"></a><h3>struct GcrComparableIface</h3>
<pre class="programlisting">struct GcrComparableIface {
	GTypeInterface parent;
	gint (*compare) (GcrComparable *self, GcrComparable *other);
};
</pre>
<p>The interface to implement for <a class="link" href="GcrComparable.html" title="GcrComparable"><span class="type">GcrComparable</span></a></p>
<div class="refsect3">
<a name="GcrComparableIface.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GTypeInterface"><span class="type">GTypeInterface</span></a> <em class="structfield"><code><a name="GcrComparableIface.parent"></a>parent</code></em>;</p></td>
<td class="struct_member_description"><p>type interface</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GcrComparableIface.compare"></a>compare</code></em> ()</p></td>
<td class="struct_member_description"><p>Compare whether tow objects represent the same thing.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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