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<h1>reader.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">// Math Type Library</span>
<a name="l00003"></a>00003 <span class="comment">// $Id: reader.h,v 1.6 2002/04/20 06:35:05 cparpart Exp $</span>
<a name="l00004"></a>00004 <span class="comment">// (This file contains the reader (parser) specific interface)</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// Copyright (c) 2002 by Christian Parpart <cparpart@surakware.net></span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// This library is free software; you can redistribute it and/or</span>
<a name="l00009"></a>00009 <span class="comment">// modify it under the terms of the GNU Library General Public</span>
<a name="l00010"></a>00010 <span class="comment">// License as published by the Free Software Foundation; either</span>
<a name="l00011"></a>00011 <span class="comment">// version 2 of the License, or (at your option) any later version.</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// This library is distributed in the hope that it will be useful,</span>
<a name="l00014"></a>00014 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00015"></a>00015 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00016"></a>00016 <span class="comment">// Library General Public License for more details.</span>
<a name="l00017"></a>00017 <span class="comment">// </span>
<a name="l00018"></a>00018 <span class="comment">// You should have received a copy of the GNU Library General Public License</span>
<a name="l00019"></a>00019 <span class="comment">// along with this library; see the file COPYING.LIB. If not, write to</span>
<a name="l00020"></a>00020 <span class="comment">// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,</span>
<a name="l00021"></a>00021 <span class="comment">// Boston, MA 02111-1307, USA.</span>
<a name="l00023"></a>00023 <span class="comment"></span><span class="preprocessor">#ifndef libmath_reader_h</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define libmath_reader_h</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <math++/error.h></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#include <string></span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="keyword">namespace </span>math {
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keyword">template</span><<span class="keyword">class</span>> <span class="keyword">class </span>TNode;
<a name="l00033"></a>00033
<a name="l00038"></a><a class="code" href="classmath_1_1EReadError.html">00038</a> <span class="keyword">class </span><a class="code" href="classmath_1_1EReadError.html">EReadError</a> : <span class="keyword">public</span> <a class="code" href="classmath_1_1EMath.html">EMath</a> {
<a name="l00039"></a>00039 <span class="keyword">public</span>:
<a name="l00040"></a>00040 <a class="code" href="classmath_1_1EReadError.html">EReadError</a>(<span class="keyword">const</span> std::string& AReason) : <a class="code" href="classmath_1_1EMath.html">EMath</a>(AReason) {}
<a name="l00041"></a>00041 };
<a name="l00042"></a>00042
<a name="l00048"></a>00048 <span class="keyword">template</span><<span class="keyword">class</span> T>
<a name="l00049"></a><a class="code" href="classmath_1_1TReader.html">00049</a> <span class="keyword">class </span><a class="code" href="classmath_1_1TReader.html">TReader</a> {
<a name="l00050"></a>00050 <span class="keyword">private</span>:
<a name="l00052"></a>00052 <span class="keyword">enum</span> TToken {
<a name="l00053"></a>00053 <span class="comment">/* TAKE CARE : THE VALUES ARE HARD CODED */</span>
<a name="l00054"></a>00054 tkInvalid, tkEnd,
<a name="l00055"></a>00055 tkNumber = 1000, tkSymbol,
<a name="l00056"></a>00056 tkUnEqu, tkLess, tkGreater, tkLessEqu, tkGreaterEqu,
<a name="l00057"></a>00057 tkVeryLess, tkVeryGreat,
<a name="l00058"></a>00058 tkEqu = <span class="charliteral">'='</span>, tkComma = <span class="charliteral">','</span>,
<a name="l00059"></a>00059 tkPlus = <span class="charliteral">'+'</span>, tkMinus = <span class="charliteral">'-'</span>, tkMul = <span class="charliteral">'*'</span>, tkDiv = <span class="charliteral">'/'</span>, tkPow = <span class="charliteral">'^'</span>,
<a name="l00060"></a>00060 tkRndOpen = <span class="charliteral">'('</span>, tkRndClose = <span class="charliteral">')'</span>, tkBrOpen = <span class="charliteral">'['</span>, tkBrClose = <span class="charliteral">']'</span>,
<a name="l00061"></a>00061 tkAngOpen = <span class="charliteral">'<'</span>, tkAngClose = <span class="charliteral">'>'</span>, tkSetOpen = <span class="charliteral">'{'</span>, tkSetClose = <span class="charliteral">'}'</span>
<a name="l00062"></a>00062 };
<a name="l00063"></a>00063
<a name="l00064"></a>00064 std::string FExprStr; <span class="comment">// holds the current parsed expression</span>
<a name="l00065"></a>00065 std::string::size_type FPos;<span class="comment">// holds the current read index</span>
<a name="l00066"></a>00066
<a name="l00067"></a>00067 TToken FToken; <span class="comment">// holds current parsed token id</span>
<a name="l00068"></a>00068 T FNumber; <span class="comment">// holds last read number</span>
<a name="l00069"></a>00069 std::string FSymbol; <span class="comment">// holds last read symbol</span>
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keyword">private</span>:
<a name="l00072"></a>00072 <a class="code" href="classmath_1_1TReader.html">TReader</a>(<span class="keyword">const</span> std::string& AInput);
<a name="l00073"></a>00073
<a name="l00075"></a>00075 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *equation(<span class="keywordtype">bool</span> <span class="keyword">get</span>);
<a name="l00076"></a>00076 <span class="comment">// parses an expression (really any expression, even sub equations)</span>
<a name="l00077"></a>00077 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *expr(<span class="keywordtype">bool</span> <span class="keyword">get</span>);
<a name="l00079"></a>00079 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *simpleExpr(<span class="keywordtype">bool</span> <span class="keyword">get</span>);
<a name="l00081"></a>00081 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *term(<span class="keywordtype">bool</span> <span class="keyword">get</span>);
<a name="l00083"></a>00083 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *factor(<span class="keywordtype">bool</span> <span class="keyword">get</span>);
<a name="l00085"></a>00085 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *prim(<span class="keywordtype">bool</span> <span class="keyword">get</span>);
<a name="l00086"></a>00086
<a name="l00088"></a>00088 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *createSymbol();
<a name="l00090"></a>00090 <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *param();
<a name="l00091"></a>00091
<a name="l00093"></a>00093 <span class="keywordtype">bool</span> eof() <span class="keyword">const</span>;
<a name="l00094"></a>00094
<a name="l00096"></a>00096 TToken nextToken();
<a name="l00098"></a>00098 <span class="keywordtype">bool</span> readOperator();
<a name="l00100"></a>00100 <span class="keywordtype">bool</span> readNumber();
<a name="l00102"></a>00102 <span class="keywordtype">bool</span> readSymbol();
<a name="l00103"></a>00103
<a name="l00105"></a>00105 <span class="keyword">static</span> std::string tok2str(TToken AToken);
<a name="l00107"></a>00107 <span class="keywordtype">void</span> consume(TToken AToken);
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keyword">public</span>:
<a name="l00114"></a>00114 <span class="keyword">static</span> <a class="code" href="classmath_1_1TNode.html">TNode<T></a> *<a class="code" href="classmath_1_1TReader.html#7e98ab0592d7b3af6ec2ba8ec30484b6">parse</a>(<span class="keyword">const</span> std::string& AInput, <span class="keywordtype">bool</span> AEquation = <span class="keyword">false</span>);
<a name="l00115"></a>00115 };
<a name="l00116"></a>00116
<a name="l00117"></a>00117 } <span class="comment">// namespace math</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="preprocessor">#include <math++/reader.tcc></span>
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="preprocessor">#endif</span>
</pre></div></div>
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Mandriva
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