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<h1>dox/Common/vtkInformationInternals.h</h1><a href="a02049.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: Visualization Toolkit</span>
<a name="l00004"></a>00004 <span class="comment"> Module: $RCSfile: vtkInformationInternals.h,v $</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen</span>
<a name="l00007"></a>00007 <span class="comment"> All rights reserved.</span>
<a name="l00008"></a>00008 <span class="comment"> See Copyright.txt or http://www.kitware.com/Copyright.htm for details.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"> This software is distributed WITHOUT ANY WARRANTY; without even</span>
<a name="l00011"></a>00011 <span class="comment"> the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR</span>
<a name="l00012"></a>00012 <span class="comment"> PURPOSE. See the above copyright notice for more information.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment">=========================================================================*/</span>
<a name="l00023"></a>00023 <span class="preprocessor">#ifndef __vtkInformationInternals_h</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define __vtkInformationInternals_h</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="a02051.html">vtkInformationKey.h</a>"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="a02080.html">vtkObjectBase.h</a>"</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#include <assert.h></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="comment">// Note: assumes long is at least 32 bits.</span>
<a name="l00033"></a><a class="code" href="a02049.html#bc6126af1d45847bc59afa0aa3216b04f82e9e9c71698a01e404a795e9e58d09">00033</a> <span class="keyword">enum</span> { <a class="code" href="a02049.html#bc6126af1d45847bc59afa0aa3216b04f82e9e9c71698a01e404a795e9e58d09">_stl_num_primes</a> = 16 };
<a name="l00034"></a><a class="code" href="a02049.html#01079f4f2932df0d672328ffacdce9e7">00034</a> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> <a class="code" href="a02049.html#01079f4f2932df0d672328ffacdce9e7">_stl_prime_list</a>[<a class="code" href="a02049.html#bc6126af1d45847bc59afa0aa3216b04f82e9e9c71698a01e404a795e9e58d09">_stl_num_primes</a>] =
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 5u, 11u, 23u, 31u, 41u,
<a name="l00037"></a>00037 53u, 97u, 193u, 389u, 769u,
<a name="l00038"></a>00038 1543u, 3079u, 6151u, 12289u, 24593u,
<a name="l00039"></a>00039 49157u
<a name="l00040"></a>00040 };
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">// use a mod hash or a bit hash</span>
<a name="l00043"></a><a class="code" href="a02049.html#d799f7a145129ab8bcfdfba070ed71d5">00043</a> <span class="preprocessor">#define USE_MOD 1</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00046"></a><a class="code" href="a00884.html">00046</a> <span class="keyword">class </span><a class="code" href="a00884.html" title="internal structure for vtkInformation">vtkInformationInternals</a>
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 <span class="keyword">public</span>:
<a name="l00049"></a>00049 <span class="comment">// Vector to store ordered key/value pairs for efficient lookup with</span>
<a name="l00050"></a>00050 <span class="comment">// a binary search. Typically not many pairs are stored so linear</span>
<a name="l00051"></a>00051 <span class="comment">// insertion time is okay.</span>
<a name="l00052"></a><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">00052</a> <a class="code" href="a00886.html" title="Superclass for vtkInformation keys.">vtkInformationKey</a>** <a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a>;
<a name="l00053"></a><a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">00053</a> <a class="code" href="a01085.html" title="abstract base class for most VTK objects">vtkObjectBase</a>** <a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">Values</a>;
<a name="l00054"></a><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">00054</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> <a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>;
<a name="l00055"></a><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">00055</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> <a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a>;
<a name="l00056"></a>00056
<a name="l00057"></a><a class="code" href="a00884.html#2af3eb44fbc55118b4748a15751d959a">00057</a> <a class="code" href="a00884.html#2af3eb44fbc55118b4748a15751d959a">vtkInformationInternals</a>()
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 this-><a class="code" href="a00884.html#12b4ef239f824c1abcca6c9357153c6b">ComputeHashKey</a>(33);
<a name="l00060"></a>00060 this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a> = <span class="keyword">new</span> <a class="code" href="a00886.html" title="Superclass for vtkInformation keys.">vtkInformationKey</a>* [this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>];
<a name="l00061"></a>00061 this-><a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">Values</a> = <span class="keyword">new</span> <a class="code" href="a01085.html" title="abstract base class for most VTK objects">vtkObjectBase</a>* [this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>];
<a name="l00062"></a>00062 <span class="keywordtype">int</span> i;
<a name="l00063"></a>00063 <span class="keywordflow">for</span> (i = 0; i < this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>; ++i)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a>[i] = 0;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a><a class="code" href="a00884.html#87c8af9dfdb862ebd2dae9ff58bd7fb8">00069</a> <a class="code" href="a00884.html#2af3eb44fbc55118b4748a15751d959a">vtkInformationInternals</a>(<span class="keywordtype">int</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210e3d5e7c015dff08d8daf72a0102e1444">size</a>)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 assert(size < 65000 && <span class="stringliteral">"information cannot grow to more than 65000 entries"</span>);
<a name="l00072"></a>00072 this-><a class="code" href="a00884.html#12b4ef239f824c1abcca6c9357153c6b">ComputeHashKey</a>(size);
<a name="l00073"></a>00073 this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a> = <span class="keyword">new</span> <a class="code" href="a00886.html" title="Superclass for vtkInformation keys.">vtkInformationKey</a>* [this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>];
<a name="l00074"></a>00074 this-><a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">Values</a> = <span class="keyword">new</span> <a class="code" href="a01085.html" title="abstract base class for most VTK objects">vtkObjectBase</a>* [this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>];
<a name="l00075"></a>00075 <span class="keywordtype">int</span> i;
<a name="l00076"></a>00076 <span class="keywordflow">for</span> (i = 0; i < this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>; ++i)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a>[i] = 0;
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00082"></a><a class="code" href="a00884.html#0b520a0c05ae5caf642b920f2d457448">00082</a> <a class="code" href="a00884.html#0b520a0c05ae5caf642b920f2d457448">~vtkInformationInternals</a>()
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> i;
<a name="l00085"></a>00085 <span class="keywordflow">for</span> (i = 0; i < this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a>; ++i)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <a class="code" href="a01085.html" title="abstract base class for most VTK objects">vtkObjectBase</a> *<a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d2106bf5e5151797630e91167caab3f22b9a">value</a> = this-><a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">Values</a>[i];
<a name="l00088"></a>00088 <span class="keywordflow">if</span> (this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a>[i] && value)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a>[i] = 0;
<a name="l00091"></a>00091 this-><a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">Values</a>[i] = 0;
<a name="l00092"></a>00092 value-><a class="code" href="a01085.html#2f77b7beccf178c43570367c50c41567">UnRegister</a>(0);
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 <span class="keyword">delete</span> [] this-><a class="code" href="a00884.html#d293000ef32a1079ea5e5996ae6ffae9">Keys</a>;
<a name="l00096"></a>00096 <span class="keyword">delete</span> [] this-><a class="code" href="a00884.html#4d8290fcc64b66ee83291c30713b9c58">Values</a>;
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098
<a name="l00099"></a><a class="code" href="a00884.html#12b4ef239f824c1abcca6c9357153c6b">00099</a> <span class="keywordtype">void</span> <a class="code" href="a00884.html#12b4ef239f824c1abcca6c9357153c6b">ComputeHashKey</a>(<span class="keywordtype">int</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210e3d5e7c015dff08d8daf72a0102e1444">size</a>)
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101 <span class="comment">// finds the best hash key for the target table size</span>
<a name="l00102"></a>00102 <span class="comment">// and then adjust table size to fit the hash size</span>
<a name="l00103"></a>00103 <span class="preprocessor">#if USE_MOD</span>
<a name="l00104"></a>00104 <span class="preprocessor"></span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> i = 1;
<a name="l00105"></a>00105 <span class="keywordflow">while</span>(i < <a class="code" href="a02049.html#bc6126af1d45847bc59afa0aa3216b04f82e9e9c71698a01e404a795e9e58d09">_stl_num_primes</a> && <a class="code" href="a02049.html#01079f4f2932df0d672328ffacdce9e7">_stl_prime_list</a>[i] + 1 <= size)
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 i++;
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109 this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> = <a class="code" href="a02049.html#01079f4f2932df0d672328ffacdce9e7">_stl_prime_list</a>[i-1];
<a name="l00110"></a>00110 this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a> = this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> + 1;
<a name="l00111"></a>00111 <span class="preprocessor">#else</span>
<a name="l00112"></a>00112 <span class="preprocessor"></span> this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> = 1;
<a name="l00113"></a>00113 <span class="keywordflow">while</span> (this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> + 1 <= size)
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115 this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> *= 2;
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117 this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> = this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a>/2-1;
<a name="l00118"></a>00118 this-><a class="code" href="a00884.html#8767d9a306b789cd21fb52542a38578d">TableSize</a> = this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a> + 2;
<a name="l00119"></a>00119 <span class="preprocessor">#endif </span>
<a name="l00120"></a>00120 <span class="preprocessor"></span> }
<a name="l00121"></a>00121
<a name="l00122"></a><a class="code" href="a00884.html#5404cd778c7e5f5ca88b86dc30ad0e6d">00122</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> <a class="code" href="a00884.html#5404cd778c7e5f5ca88b86dc30ad0e6d">Hash</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> hv)
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="preprocessor">#if USE_MOD</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span> <span class="keywordflow">return</span> hv % this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a>;
<a name="l00126"></a>00126 <span class="preprocessor">#else </span>
<a name="l00127"></a>00127 <span class="preprocessor"></span> <span class="keywordflow">return</span> (hv >> 2 & this-><a class="code" href="a00884.html#2702f96d8d2acbcdc0ce6446b30831a1">HashKey</a>);
<a name="l00128"></a>00128 <span class="preprocessor">#endif</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span> }
<a name="l00130"></a>00130 };
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="preprocessor">#endif</span>
</pre></div></div>
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