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90 lines
2.6 KiB
Plaintext
90 lines
2.6 KiB
Plaintext
/*
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* MathLexer.lpp, part of LatAnalyze 3
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*
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* Copyright (C) 2013 - 2016 Antonin Portelli
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*
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* LatAnalyze 3 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LatAnalyze 3 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LatAnalyze 3. If not, see <http://www.gnu.org/licenses/>.
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*/
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%option reentrant
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%option prefix="_math_"
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%option bison-bridge
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%option bison-locations
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%option noyywrap
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%option yylineno
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%{
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#include <LatAnalyze/MathInterpreter.hpp>
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#include "MathParser.hpp"
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using namespace std;
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using namespace Latan;
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#define YY_EXTRA_TYPE MathInterpreter::MathParserState *
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#define YY_USER_ACTION \
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yylloc->first_line = yylloc->last_line = yylineno;\
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yylloc->first_column = yylloc->last_column + 1;\
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yylloc->last_column = yylloc->first_column + yyleng - 1;
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#define YY_INPUT(buf, result, max_size) \
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{ \
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(*yyextra->stream).read(buf, max_size);\
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result = (*yyextra->stream).gcount();\
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}
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#define YY_DEBUG 0
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#if (YY_DEBUG == 1)
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#define RET(var) cout << (var) << "(" << yytext << ")" << endl; return (var)
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#define RETTOK(tok) cout << #tok << "(" << yytext << ")" << endl; return tok
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#else
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#define RET(var) return (var)
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#define RETTOK(tok) return tok
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#endif
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%}
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DIGIT [0-9]
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ALPHA [a-zA-Z_]
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FLOAT (({DIGIT}+(\.{DIGIT}*)?)|({DIGIT}*\.{DIGIT}+))([eE][+-]?{DIGIT}+)?
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SPECIAL [;,()+\-*/^={}]
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BLANK [ \t]
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%%
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{FLOAT} {
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strncpy(yylval->val_str,yytext,MAXIDLENGTH);
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RETTOK(FLOAT);
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}
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{SPECIAL} {RET(*yytext);}
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return {RETTOK(RETURN);}
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{ALPHA}({ALPHA}|{DIGIT})* {
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strncpy(yylval->val_str,yytext,MAXIDLENGTH);
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RETTOK(ID);
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}
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<*>\n {yylloc->last_column = 0;}
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<*>{BLANK}
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<*>. {yylval->val_char = yytext[0]; RETTOK(ERR);}
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%%
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void MathInterpreter::MathParserState::initScanner()
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{
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yylex_init(&scanner);
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yyset_extra(this, scanner);
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}
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void MathInterpreter::MathParserState::destroyScanner()
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{
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yylex_destroy(scanner);
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}
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