Fast SAT Solver (C++, GAlib)
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<h1>fss-satgen.cpp</h1><a href="fss-satgen_8cpp.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"> * Copyright (C) 2008 Kamil Dudka <xdudka00@stud.fit.vutbr.cz></span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * This file is part of fss (Fast SAT Solver).</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * fss is free software: you can redistribute it and/or modify</span>
<a name="l00007"></a>00007 <span class="comment"> * it under the terms of the GNU General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment"> * the Free Software Foundation, either version 3 of the License, or</span>
<a name="l00009"></a>00009 <span class="comment"> * any later version.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * fss is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00014"></a>00014 <span class="comment"> * GNU General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> * along with fss. If not, see <http://www.gnu.org/licenses/>.</span>
<a name="l00018"></a>00018 <span class="comment"> */</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <unistd.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <sys/time.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <time.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <iostream></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <vector></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <string></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <sstream></span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="keyword">using namespace </span>std;
<a name="l00031"></a>00031
<a name="l00032"></a><a class="code" href="classRandGenerator.html">00032</a> <span class="keyword">class </span><a class="code" href="classRandGenerator.html">RandGenerator</a> {
<a name="l00033"></a>00033 <span class="keyword">public</span>:
<a name="l00034"></a>00034 <span class="comment">// Initialize random generator seed</span>
<a name="l00035"></a><a class="code" href="classRandGenerator.html#920e4e6282efdbfccb9b8582cfd32f75">00035</a> <a class="code" href="classRandGenerator.html#920e4e6282efdbfccb9b8582cfd32f75">RandGenerator</a>() {
<a name="l00036"></a>00036 <span class="comment">// Get system clock</span>
<a name="l00037"></a>00037 <span class="keyword">struct </span>timeval tv;
<a name="l00038"></a>00038 <span class="keywordflow">if</span> (0 != gettimeofday(&tv, NULL))
<a name="l00039"></a>00039 <span class="comment">// Failed to read system time</span>
<a name="l00040"></a>00040 <span class="keywordflow">throw</span> std::bad_alloc();
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">// Convert to microseconds</span>
<a name="l00043"></a>00043 <span class="keywordtype">int</span> clk = tv.tv_usec;
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="comment">// Initialize seed</span>
<a name="l00046"></a>00046 this->seed = clk * getpid();
<a name="l00047"></a>00047 <span class="preprocessor">#if 0//ndef NDEBUG</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span> std::cerr << <span class="stringliteral">"RandGenerator::RandGenerator(): seed="</span> << seed << std::endl;
<a name="l00049"></a>00049 <span class="preprocessor">#endif // NDEBUG</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span> }
<a name="l00051"></a>00051 <span class="comment">// Return random number in interval <0,1)</span>
<a name="l00052"></a><a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">00052</a> <span class="keywordtype">float</span> <a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>() {
<a name="l00053"></a>00053 <span class="keywordtype">float</span> rnd = rand_r(&seed);
<a name="l00054"></a>00054 <span class="keywordflow">return</span> rnd/RAND_MAX;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056 <span class="comment">// Return random float in interval <min,max)</span>
<a name="l00057"></a><a class="code" href="classRandGenerator.html#b5a0baeb0865a28d8250476261a44c1f">00057</a> <span class="keywordtype">float</span> <a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>(<span class="keywordtype">float</span> min, <span class="keywordtype">float</span> max) {
<a name="l00058"></a>00058 <span class="keywordtype">float</span> rnd = this-><a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>();
<a name="l00059"></a>00059 rnd *= max-min;
<a name="l00060"></a>00060 rnd += min;
<a name="l00061"></a>00061 <span class="keywordflow">return</span> rnd;
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063 <span class="comment">// Return random int in interval <min,max)</span>
<a name="l00064"></a><a class="code" href="classRandGenerator.html#a9d0d3096f6694b5bf263907d9812ba3">00064</a> <span class="keywordtype">int</span> <a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>(<span class="keywordtype">int</span> min, <span class="keywordtype">int</span> max) {
<a name="l00065"></a>00065 <span class="keywordtype">float</span> rnd = this-><a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>(
<a name="l00066"></a>00066 static_cast<float>(min),
<a name="l00067"></a>00067 static_cast<float>(max)
<a name="l00068"></a>00068 );
<a name="l00069"></a>00069 <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(rnd);
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071 <span class="keyword">private</span>:
<a name="l00072"></a>00072 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> seed;
<a name="l00073"></a>00073 };
<a name="l00074"></a>00074
<a name="l00079"></a><a class="code" href="fss-satgen_8cpp.html#0ddf1224851353fc92bfbff6f499fa97">00079</a> <span class="keywordtype">int</span> <a class="code" href="fss-satgen_8cpp.html#0ddf1224851353fc92bfbff6f499fa97">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[]) {
<a name="l00080"></a>00080 <span class="keywordflow">if</span> (argc<3) {
<a name="l00081"></a>00081 std::cerr << <span class="stringliteral">"Usage: fss-satgen VARCOUNT FORMSCOUNT"</span> << std::endl;
<a name="l00082"></a>00082 <span class="keywordflow">return</span> -1;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keyword">const</span> <span class="keywordtype">int</span> VARCOUNT = atoi(argv[1]);
<a name="l00086"></a>00086 <span class="keyword">const</span> <span class="keywordtype">int</span> FORMSCOUNT = atoi(argv[2]);
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (0==VARCOUNT || 0==FORMSCOUNT) {
<a name="l00088"></a>00088 std::cerr << <span class="stringliteral">"Usage: fss-satgen VARCOUNT FORMSCOUNT"</span> << std::endl;
<a name="l00089"></a>00089 <span class="keywordflow">return</span> -1;
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="comment">// Random numbers generator</span>
<a name="l00093"></a>00093 <a class="code" href="classRandGenerator.html">RandGenerator</a> rnd;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="comment">// Variable names</span>
<a name="l00096"></a>00096 vector<string> varNames(VARCOUNT);
<a name="l00097"></a>00097 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i<VARCOUNT; i++) {
<a name="l00098"></a>00098 ostringstream stream;
<a name="l00099"></a>00099 stream << <span class="stringliteral">"a"</span> << i;
<a name="l00100"></a>00100 varNames[i] = stream.str();
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">// Binary operators</span>
<a name="l00104"></a>00104 vector<string> binopSet;
<a name="l00105"></a>00105 binopSet.push_back(<span class="stringliteral">"AND"</span>);
<a name="l00106"></a>00106 binopSet.push_back(<span class="stringliteral">"OR"</span>);
<a name="l00107"></a>00107 binopSet.push_back(<span class="stringliteral">"XOR"</span>);
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="comment">// FA control state</span>
<a name="l00110"></a>00110 <span class="keyword">enum</span> EState {
<a name="l00111"></a>00111 S_EXPR,
<a name="l00112"></a>00112 S_BINOP
<a name="l00113"></a>00113 } state = S_EXPR;
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">// count of opened parenthesis</span>
<a name="l00116"></a>00116 <span class="keywordtype">int</span> lParCount = 0;
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">// Generator main loop</span>
<a name="l00119"></a>00119 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> fCount=0; fCount<FORMSCOUNT;) {
<a name="l00120"></a>00120 <span class="keywordflow">switch</span> (state) {
<a name="l00121"></a>00121 <span class="keywordflow">case</span> S_EXPR:
<a name="l00122"></a>00122 <span class="comment">// Unary NOT</span>
<a name="l00123"></a>00123 <span class="keywordflow">if</span> (rnd.<a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>() < 0.3) {
<a name="l00124"></a>00124 std::cout << <span class="stringliteral">"~"</span> << std::flush;
<a name="l00125"></a>00125 <span class="keywordflow">break</span>;
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 <span class="comment">// Open a pair of brackets</span>
<a name="l00128"></a>00128 <span class="keywordflow">if</span> (rnd.<a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>(0.1f*lParCount, 1.0f) < 0.5) {
<a name="l00129"></a>00129 std::cout << <span class="stringliteral">"("</span> << std::flush;
<a name="l00130"></a>00130 lParCount++;
<a name="l00131"></a>00131 <span class="keywordflow">break</span>;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 <span class="comment">// Random variable</span>
<a name="l00134"></a>00134 std::cout << varNames[rnd.<a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>(0, VARCOUNT)] << std::flush;
<a name="l00135"></a>00135 state = S_BINOP;
<a name="l00136"></a>00136 <span class="keywordflow">break</span>;
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">case</span> S_BINOP:
<a name="l00139"></a>00139 <span class="keywordflow">if</span> (rnd.<a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>() < 0.1) {
<a name="l00140"></a>00140 <span class="comment">// Close formula</span>
<a name="l00141"></a>00141 <span class="keywordflow">for</span>(; lParCount; lParCount--)
<a name="l00142"></a>00142 std::cout << <span class="stringliteral">")"</span>;
<a name="l00143"></a>00143 std::cout << <span class="stringliteral">";"</span> << std::endl;
<a name="l00144"></a>00144 fCount++;
<a name="l00145"></a>00145 state = S_EXPR;
<a name="l00146"></a>00146 <span class="keywordflow">break</span>;
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (rnd.<a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>() < 0.05*lParCount) {
<a name="l00149"></a>00149 <span class="comment">// Close a pair of brackets</span>
<a name="l00150"></a>00150 std::cout << <span class="stringliteral">")"</span> << std::flush;
<a name="l00151"></a>00151 lParCount--;
<a name="l00152"></a>00152 <span class="keywordflow">break</span>;
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154 <span class="comment">// Random binary operator</span>
<a name="l00155"></a>00155 std::cout << <span class="stringliteral">" "</span> << binopSet[rnd.<a class="code" href="classRandGenerator.html#7c46a91465df2ba39ecef6d04301502f">getRand</a>(0, binopSet.size())] << <span class="stringliteral">" "</span> << std::flush;
<a name="l00156"></a>00156 state = S_EXPR;
<a name="l00157"></a>00157 <span class="keywordflow">break</span>;
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 <span class="comment">// new line at end of file generated</span>
<a name="l00161"></a>00161 std::cout << std::endl;
<a name="l00162"></a>00162 }
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