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<h1>itkStructHashFunction.h</h1><a href="itkStructHashFunction_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*=========================================================================</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Program: Insight Segmentation & Registration Toolkit</span>
<a name="l00004"></a>00004 <span class="comment"> Module: $RCSfile: itkStructHashFunction.h,v $</span>
<a name="l00005"></a>00005 <span class="comment"> Language: C++</span>
<a name="l00006"></a>00006 <span class="comment"> Date: $Date: 2009-01-27 19:30:16 $</span>
<a name="l00007"></a>00007 <span class="comment"> Version: $Revision: 1.6 $</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> Copyright (c) Insight Software Consortium. All rights reserved.</span>
<a name="l00010"></a>00010 <span class="comment"> See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment"> This software is distributed WITHOUT ANY WARRANTY; without even </span>
<a name="l00013"></a>00013 <span class="comment"> the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR </span>
<a name="l00014"></a>00014 <span class="comment"> PURPOSE. See the above copyright notices for more information.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">=========================================================================*/</span>
<a name="l00017"></a>00017 <span class="preprocessor">#ifndef __itkStructHashFunction_h</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define __itkStructHashFunction_h</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020 <span class="keyword">namespace </span>itk
<a name="l00021"></a>00021 {
<a name="l00022"></a>00022
<a name="l00035"></a>00035 <span class="keyword">template</span>< <span class="keyword">class</span> TInput >
<a name="l00036"></a><a class="code" href="classitk_1_1StructHashFunction.html">00036</a> <span class="keyword">class </span><a class="code" href="classitk_1_1StructHashFunction.html" title="Generic hash function for an arbitrary struct (or class).">StructHashFunction</a>
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 <span class="keyword">public</span>:
<a name="l00039"></a>00039
<a name="l00041"></a><a class="code" href="classitk_1_1StructHashFunction.html#cb77ac2b17990a2274f65c8ce77f7b1d">00041</a> <span class="keyword">typedef</span> <a class="code" href="classitk_1_1StructHashFunction.html" title="Generic hash function for an arbitrary struct (or class).">StructHashFunction</a> <a class="code" href="classitk_1_1StructHashFunction.html" title="Generic hash function for an arbitrary struct (or class).">Self</a>;
<a name="l00042"></a>00042
<a name="l00044"></a><a class="code" href="classitk_1_1StructHashFunction.html#f2ad53caf2f3f6fb6d6e7f301c3cec18">00044</a> <span class="keyword">typedef</span> TInput <a class="code" href="classitk_1_1StructHashFunction.html#f2ad53caf2f3f6fb6d6e7f301c3cec18">InputType</a>;
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classitk_1_1StructHashFunction.html#c0ee8f1ae08a58f324a0333552579951">operator()</a>( <span class="keyword">const</span> <a class="code" href="classitk_1_1StructHashFunction.html#f2ad53caf2f3f6fb6d6e7f301c3cec18">InputType</a>& key ) <span class="keyword">const</span>;
<a name="l00047"></a>00047
<a name="l00048"></a>00048 };
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="keyword">template</span>< <span class="keyword">class</span> TInput >
<a name="l00051"></a>00051 <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>
<a name="l00052"></a>00052 <a class="code" href="classitk_1_1StructHashFunction.html#c0ee8f1ae08a58f324a0333552579951">StructHashFunction< TInput ></a>
<a name="l00053"></a><a class="code" href="classitk_1_1StructHashFunction.html#c0ee8f1ae08a58f324a0333552579951">00053</a> <a class="code" href="classitk_1_1StructHashFunction.html#c0ee8f1ae08a58f324a0333552579951">::operator()</a>( <span class="keyword">const</span> InputType& key )<span class="keyword"> const</span>
<a name="l00054"></a>00054 <span class="keyword"></span>{
<a name="l00055"></a>00055 ::size_t len = <span class="keyword">sizeof</span>( InputType );
<a name="l00056"></a>00056 <span class="keyword">const</span> <span class="keywordtype">char</span>* p = <span class="keyword">reinterpret_cast<</span> <span class="keyword">const </span><span class="keywordtype">char</span>* <span class="keyword">></span>( &key );
<a name="l00057"></a>00057 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="structitk_1_1hash.html">hash</a> = 0;
<a name="l00058"></a>00058 <span class="keywordflow">while</span>( len-- )
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060 hash = hash * 65 + *p++;
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062 hash += (hash >> 5);
<a name="l00063"></a>00063 <span class="keywordflow">return</span> hash;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="preprocessor">#endif // ndef itkStructHashFunction_h</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span>
</pre></div></div>
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