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  • Committer: Package Import Robot
  • Author(s): Jeff Breidenbach
  • Date: 2014-02-03 11:10:20 UTC
  • mfrom: (1.3.1) (19.1.1 experimental)
  • Revision ID: package-import@ubuntu.com-20140203111020-igquodd7pjlp3uri
Tags: 3.03.01-1
* New upstream release, includes critical fix to PDF rendering
* Complete leptonlib transition (see bug #735509)
* Promote from experimental to unstable

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   <div id="projectname">tesseract
 
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   &#160;<span id="projectnumber">3.03</span>
 
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<a href="#nested-classes">Classes</a> &#124;
 
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<a href="#func-members">Functions</a>  </div>
 
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<div class="title">/usr/local/google/home/jbreiden/tesseract-ocr-read-only/ccstruct/statistc.h File Reference</div>  </div>
 
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</div><!--header-->
 
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<div class="contents">
 
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<div class="textblock"><code>#include &lt;stdio.h&gt;</code><br/>
 
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<code>#include &quot;<a class="el" href="a00831_source.html">host.h</a>&quot;</code><br/>
 
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<code>#include &quot;<a class="el" href="a00834_source.html">kdpair.h</a>&quot;</code><br/>
 
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<code>#include &quot;<a class="el" href="a01203_source.html">scrollview.h</a>&quot;</code><br/>
 
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</div>
 
111
<p><a href="a00798_source.html">Go to the source code of this file.</a></p>
 
112
<table class="memberdecls">
 
113
<tr><td colspan="2"><h2><a name="nested-classes"></a>
 
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Classes</h2></td></tr>
 
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<tr><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00556.html">STATS</a></td></tr>
 
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<tr><td colspan="2"><h2><a name="func-members"></a>
 
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Functions</h2></td></tr>
 
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<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00798.html#ab531cf8bc727a6e03af3a6cc10b4cd7a">choose_nth_item</a> (<a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index, float *array, <a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> <a class="el" href="a01043.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>)</td></tr>
 
119
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00798.html#a71a0ba1133f24e41c7123bc460798744">choose_nth_item</a> (<a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index, void *array, <a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> <a class="el" href="a01043.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>, size_t size, int(*compar)(const void *, const void *))</td></tr>
 
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<tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00798.html#ab483724220813ab89951f7c264dcdd26">swap_entries</a> (void *array, size_t size, <a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index1, <a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index2)</td></tr>
 
121
</table>
 
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<hr/><h2>Function Documentation</h2>
 
123
<a class="anchor" id="ab531cf8bc727a6e03af3a6cc10b4cd7a"></a><!-- doxytag: member="statistc.h::choose_nth_item" ref="ab531cf8bc727a6e03af3a6cc10b4cd7a" args="(inT32 index, float *array, inT32 count)" -->
 
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<div class="memitem">
 
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<div class="memproto">
 
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      <table class="memname">
 
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        <tr>
 
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          <td class="memname"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> <a class="el" href="a00798.html#a71a0ba1133f24e41c7123bc460798744">choose_nth_item</a> </td>
 
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          <td>(</td>
 
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          <td class="paramtype"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td>
 
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          <td class="paramname"><em>index</em>, </td>
 
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        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype">float *&#160;</td>
 
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          <td class="paramname"><em>array</em>, </td>
 
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        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td>
 
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          <td class="paramname"><em>count</em>&#160;</td>
 
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        </tr>
 
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        <tr>
 
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          <td></td>
 
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          <td>)</td>
 
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          <td></td><td></td>
 
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<div class="memdoc">
 
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<p>Definition at line <a class="el" href="a00797_source.html#l00640">640</a> of file <a class="el" href="a00797_source.html">statistc.cpp</a>.</p>
 
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<div class="fragment"><pre class="fragment">                                                              {
 
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  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> next_sample;             <span class="comment">// next one to do</span>
 
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  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> next_lesser;             <span class="comment">// space for new</span>
 
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  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> prev_greater;            <span class="comment">// last one saved</span>
 
159
  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> equal_count;             <span class="comment">// no of equal ones</span>
 
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  <span class="keywordtype">float</span> pivot;                   <span class="comment">// proposed median</span>
 
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  <span class="keywordtype">float</span> <a class="code" href="a00525.html">sample</a>;                  <span class="comment">// current sample</span>
 
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  <span class="keywordflow">if</span> (<a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> &lt;= 1)
 
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    <span class="keywordflow">return</span> 0;
 
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  <span class="keywordflow">if</span> (<a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> == 2) {
 
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    <span class="keywordflow">if</span> (array[0] &lt; array[1]) {
 
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      <span class="keywordflow">return</span> index &gt;= 1 ? 1 : 0;
 
168
    }
 
169
    <span class="keywordflow">else</span> {
 
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      <span class="keywordflow">return</span> index &gt;= 1 ? 0 : 1;
 
171
    }
 
172
  }
 
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  <span class="keywordflow">else</span> {
 
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    <span class="keywordflow">if</span> (index &lt; 0)
 
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      index = 0;                 <span class="comment">// ensure legal</span>
 
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    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (index &gt;= <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>)
 
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      index = <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> - 1;
 
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    equal_count = (<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>) (rand() % <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>);
 
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    pivot = array[equal_count];
 
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                                 <span class="comment">// fill gap</span>
 
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    array[equal_count] = array[0];
 
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    next_lesser = 0;
 
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    prev_greater = <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>;
 
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    equal_count = 1;
 
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    <span class="keywordflow">for</span> (next_sample = 1; next_sample &lt; prev_greater;) {
 
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      sample = array[next_sample];
 
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      <span class="keywordflow">if</span> (sample &lt; pivot) {
 
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                                 <span class="comment">// shuffle</span>
 
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        array[next_lesser++] = sample;
 
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        next_sample++;
 
191
      }
 
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      <span class="keywordflow">else</span> <span class="keywordflow">if</span> (sample &gt; pivot) {
 
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        prev_greater--;
 
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                                 <span class="comment">// juggle</span>
 
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        array[next_sample] = array[prev_greater];
 
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        array[prev_greater] = sample;
 
197
      }
 
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      <span class="keywordflow">else</span> {
 
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        equal_count++;
 
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        next_sample++;
 
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      }
 
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    }
 
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    <span class="keywordflow">for</span> (next_sample = next_lesser; next_sample &lt; prev_greater;)
 
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      array[next_sample++] = pivot;
 
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    <span class="keywordflow">if</span> (index &lt; next_lesser)
 
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      <span class="keywordflow">return</span> <a class="code" href="a00797.html#ab531cf8bc727a6e03af3a6cc10b4cd7a">choose_nth_item</a> (index, array, next_lesser);
 
207
    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (index &lt; prev_greater)
 
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      <span class="keywordflow">return</span> next_lesser;        <span class="comment">// in equal bracket</span>
 
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    <span class="keywordflow">else</span>
 
210
      <span class="keywordflow">return</span> <a class="code" href="a00797.html#ab531cf8bc727a6e03af3a6cc10b4cd7a">choose_nth_item</a> (index - prev_greater,
 
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        array + prev_greater,
 
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        <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> - prev_greater) + prev_greater;
 
213
  }
 
214
}
 
215
</pre></div>
 
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</div>
 
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</div>
 
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<a class="anchor" id="a71a0ba1133f24e41c7123bc460798744"></a><!-- doxytag: member="statistc.h::choose_nth_item" ref="a71a0ba1133f24e41c7123bc460798744" args="(inT32 index, void *array, inT32 count, size_t size, int(*compar)(const void *, const void *))" -->
 
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<div class="memitem">
 
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<div class="memproto">
 
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      <table class="memname">
 
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        <tr>
 
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          <td class="memname"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> <a class="el" href="a00798.html#a71a0ba1133f24e41c7123bc460798744">choose_nth_item</a> </td>
 
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          <td>(</td>
 
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          <td class="paramtype"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td>
 
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          <td class="paramname"><em>index</em>, </td>
 
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        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype">void *&#160;</td>
 
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          <td class="paramname"><em>array</em>, </td>
 
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        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td>
 
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          <td class="paramname"><em>count</em>, </td>
 
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        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype">size_t&#160;</td>
 
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          <td class="paramname"><em>size</em>, </td>
 
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        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype">int(*)(const void *, const void *)&#160;</td>
 
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          <td class="paramname"><em>compar</em>&#160;</td>
 
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        </tr>
 
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        <tr>
 
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          <td></td>
 
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          <td>)</td>
 
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          <td></td><td></td>
 
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        </tr>
 
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</div>
 
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<div class="memdoc">
 
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<p>Definition at line <a class="el" href="a00797_source.html#l00707">707</a> of file <a class="el" href="a00797_source.html">statistc.cpp</a>.</p>
 
262
<div class="fragment"><pre class="fragment">                                                               {
 
263
  <span class="keywordtype">int</span> result;                    <span class="comment">// of compar</span>
 
264
  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> next_sample;             <span class="comment">// next one to do</span>
 
265
  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> next_lesser;             <span class="comment">// space for new</span>
 
266
  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> prev_greater;            <span class="comment">// last one saved</span>
 
267
  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> equal_count;             <span class="comment">// no of equal ones</span>
 
268
  <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> pivot;                   <span class="comment">// proposed median</span>
 
269
 
 
270
  <span class="keywordflow">if</span> (<a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> &lt;= 1)
 
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    <span class="keywordflow">return</span> 0;
 
272
  <span class="keywordflow">if</span> (<a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> == 2) {
 
273
    <span class="keywordflow">if</span> (compar (array, (<span class="keywordtype">char</span> *) array + size) &lt; 0) {
 
274
      <span class="keywordflow">return</span> index &gt;= 1 ? 1 : 0;
 
275
    }
 
276
    <span class="keywordflow">else</span> {
 
277
      <span class="keywordflow">return</span> index &gt;= 1 ? 0 : 1;
 
278
    }
 
279
  }
 
280
  <span class="keywordflow">if</span> (index &lt; 0)
 
281
    index = 0;                   <span class="comment">// ensure legal</span>
 
282
  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (index &gt;= <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>)
 
283
    index = <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> - 1;
 
284
  pivot = (<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>) (rand () % <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>);
 
285
  <a class="code" href="a00797.html#ab483724220813ab89951f7c264dcdd26">swap_entries</a> (array, size, pivot, 0);
 
286
  next_lesser = 0;
 
287
  prev_greater = <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>;
 
288
  equal_count = 1;
 
289
  <span class="keywordflow">for</span> (next_sample = 1; next_sample &lt; prev_greater;) {
 
290
    result =
 
291
      compar ((<span class="keywordtype">char</span> *) array + size * next_sample,
 
292
      (<span class="keywordtype">char</span> *) array + size * next_lesser);
 
293
    <span class="keywordflow">if</span> (result &lt; 0) {
 
294
      <a class="code" href="a00797.html#ab483724220813ab89951f7c264dcdd26">swap_entries</a> (array, size, next_lesser++, next_sample++);
 
295
      <span class="comment">// shuffle</span>
 
296
    }
 
297
    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (result &gt; 0) {
 
298
      prev_greater--;
 
299
      <a class="code" href="a00797.html#ab483724220813ab89951f7c264dcdd26">swap_entries</a>(array, size, prev_greater, next_sample);
 
300
    }
 
301
    <span class="keywordflow">else</span> {
 
302
      equal_count++;
 
303
      next_sample++;
 
304
    }
 
305
  }
 
306
  <span class="keywordflow">if</span> (index &lt; next_lesser)
 
307
    <span class="keywordflow">return</span> <a class="code" href="a00797.html#ab531cf8bc727a6e03af3a6cc10b4cd7a">choose_nth_item</a> (index, array, next_lesser, size, compar);
 
308
  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (index &lt; prev_greater)
 
309
    <span class="keywordflow">return</span> next_lesser;          <span class="comment">// in equal bracket</span>
 
310
  <span class="keywordflow">else</span>
 
311
    <span class="keywordflow">return</span> <a class="code" href="a00797.html#ab531cf8bc727a6e03af3a6cc10b4cd7a">choose_nth_item</a> (index - prev_greater,
 
312
      (<span class="keywordtype">char</span> *) array + size * prev_greater,
 
313
      <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a> - prev_greater, size,
 
314
      compar) + prev_greater;
 
315
}
 
316
</pre></div>
 
317
</div>
 
318
</div>
 
319
<a class="anchor" id="ab483724220813ab89951f7c264dcdd26"></a><!-- doxytag: member="statistc.h::swap_entries" ref="ab483724220813ab89951f7c264dcdd26" args="(void *array, size_t size, inT32 index1, inT32 index2)" -->
 
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<div class="memitem">
 
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<div class="memproto">
 
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      <table class="memname">
 
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        <tr>
 
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          <td class="memname">void <a class="el" href="a00798.html#ab483724220813ab89951f7c264dcdd26">swap_entries</a> </td>
 
325
          <td>(</td>
 
326
          <td class="paramtype">void *&#160;</td>
 
327
          <td class="paramname"><em>array</em>, </td>
 
328
        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype">size_t&#160;</td>
 
333
          <td class="paramname"><em>size</em>, </td>
 
334
        </tr>
 
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        <tr>
 
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          <td class="paramkey"></td>
 
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          <td></td>
 
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          <td class="paramtype"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td>
 
339
          <td class="paramname"><em>index1</em>, </td>
 
340
        </tr>
 
341
        <tr>
 
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          <td class="paramkey"></td>
 
343
          <td></td>
 
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          <td class="paramtype"><a class="el" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a>&#160;</td>
 
345
          <td class="paramname"><em>index2</em>&#160;</td>
 
346
        </tr>
 
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        <tr>
 
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          <td></td>
 
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          <td>)</td>
 
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          <td></td><td></td>
 
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        </tr>
 
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      </table>
 
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</div>
 
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<div class="memdoc">
 
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<p>Definition at line <a class="el" href="a00797_source.html#l00768">768</a> of file <a class="el" href="a00797_source.html">statistc.cpp</a>.</p>
 
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<div class="fragment"><pre class="fragment">                                {
 
358
  <span class="keywordtype">char</span> tmp;
 
359
  <span class="keywordtype">char</span> *ptr1;                    <span class="comment">// to entries</span>
 
360
  <span class="keywordtype">char</span> *ptr2;
 
361
  <span class="keywordtype">size_t</span> <a class="code" href="a01042.html#acd4ea858d7133e40518e0832ff9d94b2">count</a>;                  <span class="comment">// of bytes</span>
 
362
 
 
363
  ptr1 = <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span>*<span class="keyword">&gt;</span>(array) + index1 * size;
 
364
  ptr2 = <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span>*<span class="keyword">&gt;</span>(array) + index2 * size;
 
365
  <span class="keywordflow">for</span> (count = 0; count &lt; size; count++) {
 
366
    tmp = *ptr1;
 
367
    *ptr1++ = *ptr2;
 
368
    *ptr2++ = tmp;               <span class="comment">// tedious!</span>
 
369
  }
 
370
}
 
371
</pre></div>
 
372
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