Paradiseo-eo sources added
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trunk/paradiseo-eo/doc/html/eo_how_many_8h-source.html
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<title>EO: eoHowMany.h Source File</title>
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<a class="el" href="dir_000000.html">src</a> / <a class="el" href="dir_000011.html">utils</a></div>
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<h1>eoHowMany.h</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-</span>
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00002
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00003 <span class="comment">//-----------------------------------------------------------------------------</span>
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00004 <span class="comment">// eoHowMany_h.h</span>
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00005 <span class="comment">// Base class for choosing a number of guys to apply something from a popsize</span>
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00006 <span class="comment">// (c) Marc Schoenauer, 2000</span>
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00007 <span class="comment">/*</span>
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00008 <span class="comment"> This library is free software; you can redistribute it and/or</span>
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00009 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>
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00010 <span class="comment"> License as published by the Free Software Foundation; either</span>
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00011 <span class="comment"> version 2 of the License, or (at your option) any later version.</span>
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00012 <span class="comment"></span>
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00013 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
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00014 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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00015 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
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00016 <span class="comment"> Lesser General Public License for more details.</span>
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00017 <span class="comment"></span>
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00018 <span class="comment"> You should have received a copy of the GNU Lesser General Public</span>
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00019 <span class="comment"> License along with this library; if not, write to the Free Software</span>
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00020 <span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
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00021 <span class="comment"></span>
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00022 <span class="comment"> Contact: todos@geneura.ugr.es, http://geneura.ugr.es</span>
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00023 <span class="comment"> */</span>
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00024 <span class="comment">//-----------------------------------------------------------------------------</span>
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00025
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00026 <span class="preprocessor">#ifndef eoHowMany_h</span>
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00027 <span class="preprocessor"></span><span class="preprocessor">#define eoHowMany_h</span>
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00028 <span class="preprocessor"></span>
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00067 <span class="preprocessor">#include <sstream></span>
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00068
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<a name="l00069"></a><a class="code" href="classeo_how_many.html">00069</a> <span class="keyword">class </span><a class="code" href="classeo_how_many.html">eoHowMany</a> : <span class="keyword">public</span> <a class="code" href="classeo_persistent.html">eoPersistent</a>
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00070 {
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00071 <span class="keyword">public</span>:
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<a name="l00076"></a><a class="code" href="classeo_how_many.html#a0">00076</a> <a class="code" href="classeo_how_many.html#a0">eoHowMany</a>(<span class="keywordtype">double</span> _rate = 0.0, <span class="keywordtype">bool</span> _interpret_as_rate = <span class="keyword">true</span>):
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00077 rate(_rate), combien(0)
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00078 {
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00079 <span class="keywordflow">if</span> (_interpret_as_rate)
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00080 {
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00081 <span class="keywordflow">if</span> (_rate<0)
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00082 {
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00083 rate = 1.0+_rate;
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00084 <span class="keywordflow">if</span> (rate < 0) <span class="comment">// was < -1</span>
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00085 <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"rate<-1 in eoHowMany!"</span>);
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00086 }
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00087 }
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00088 <span class="keywordflow">else</span>
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00089 {
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00090 rate = 0.0; <span class="comment">// just in case, but shoud be unused</span>
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00091 combien = int(_rate); <span class="comment">// negative values are allowed here</span>
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00092 <span class="keywordflow">if</span> (combien != _rate)
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00093 std::cerr << <span class="stringliteral">"Warning: Number was rounded in eoHowMany"</span>;
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00094 }
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00095 }
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00096
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<a name="l00099"></a><a class="code" href="classeo_how_many.html#a1">00099</a> <a class="code" href="classeo_how_many.html#a0">eoHowMany</a>(<span class="keywordtype">int</span> _combien) : rate(0.0), combien(_combien) {}
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00100
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<a name="l00103"></a><a class="code" href="classeo_how_many.html#a2">00103</a> <a class="code" href="classeo_how_many.html#a0">eoHowMany</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> _combien) : rate(0.0), combien(_combien) {}
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00104
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<a name="l00106"></a><a class="code" href="classeo_how_many.html#a3">00106</a> <span class="keyword">virtual</span> <a class="code" href="classeo_how_many.html#a3">~eoHowMany</a>() {}
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00107
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<a name="l00114"></a><a class="code" href="classeo_how_many.html#a4">00114</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classeo_how_many.html#a4">operator()</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> _size)
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00115 {
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00116 <span class="keywordflow">if</span> (combien == 0)
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00117 {
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00118 <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> int) (rate * _size);
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00119 }
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00120 <span class="keywordflow">if</span> (combien < 0)
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00121 {
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00122 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> combloc = -combien;
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00123 <span class="keywordflow">if</span> (_size<combloc)
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00124 <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Negative result in eoHowMany"</span>);
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00125 <span class="keywordflow">return</span> _size-combloc;
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00126 }
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00127 <span class="keywordflow">return</span> unsigned(combien);
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00128 }
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00129
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<a name="l00130"></a><a class="code" href="classeo_how_many.html#a5">00130</a> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classeo_how_many.html#a5">printOn</a>(std::ostream& _os)<span class="keyword"> const</span>
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00131 <span class="keyword"> </span>{
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00132 <span class="keywordflow">if</span> (combien == 0)
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00133 _os << 100*rate << <span class="stringliteral">"% "</span>;
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00134 <span class="keywordflow">else</span>
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00135 _os << combien << <span class="stringliteral">" "</span>;
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00136 <span class="keywordflow">return</span>;
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00137
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00138 }
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00139
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<a name="l00140"></a><a class="code" href="classeo_how_many.html#a6">00140</a> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classeo_how_many.html#a6">readFrom</a>(std::istream& _is)
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00141 {
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00142 std::string value;
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00143 _is >> value;
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00144 <a class="code" href="classeo_how_many.html#a6">readFrom</a>(value);
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00145 <span class="keywordflow">return</span>;
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00146 }
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00147
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00148 <span class="keywordtype">void</span> <a class="code" href="classeo_how_many.html#a6">readFrom</a>(std::string _value)
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00149 {
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00150 <span class="comment">// check for %</span>
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00151 <span class="keywordtype">bool</span> interpret_as_rate = <span class="keyword">false</span>; <span class="comment">// == no %</span>
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00152 size_t pos = _value.find(<span class="charliteral">'%'</span>);
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00153 <span class="keywordflow">if</span> (pos < _value.size()) <span class="comment">// found a %</span>
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00154 {
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00155 interpret_as_rate = <span class="keyword">true</span>;
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00156 _value.resize(pos); <span class="comment">// get rid of %</span>
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00157 }
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00158
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00159 std::istringstream is(_value);
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00160 is >> rate;
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00161 <span class="comment">// now store</span>
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00162 <span class="keywordflow">if</span> (interpret_as_rate)
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00163 {
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00164 combien = 0;
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00165 rate /= 100.0;
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00166 }
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00167 <span class="keywordflow">else</span>
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00168 combien = int(rate); <span class="comment">// and rate will not be used</span>
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00169
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00170 <span class="comment">// minimal check</span>
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00171 <span class="keywordflow">if</span> ( rate < 0.0 )
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00172 <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Negative rate read in eoHowMany::readFrom"</span>);
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00173 }
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00174
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<a name="l00176"></a><a class="code" href="classeo_how_many.html#a8">00176</a> <a class="code" href="classeo_how_many.html">eoHowMany</a> <a class="code" href="classeo_how_many.html#a8">operator-</a>()
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00177 {
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00178 <span class="keywordflow">if</span> (!combien) <span class="comment">// only rate is used</span>
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00179 rate = 1.0-rate;
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00180 <span class="keywordflow">else</span>
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00181 combien = -combien;
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00182 <span class="keywordflow">return</span> (*this);
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00183 }
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00184
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00185 <span class="keyword">private</span> :
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00186 <span class="keywordtype">double</span> rate;
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00187 <span class="keywordtype">int</span> combien;
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00188 };
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00189
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00190
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00191
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00192 <span class="preprocessor">#endif</span>
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Oct 19 05:06:36 2006 for EO by
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