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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.2.2/src/Calculator.h')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.2.2/src/Calculator.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.2.2/src/Calculator.h b/Build/source/texk/dvisvgm/dvisvgm-1.2.2/src/Calculator.h new file mode 100644 index 00000000000..36bb39d679c --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-1.2.2/src/Calculator.h @@ -0,0 +1,57 @@ +/************************************************************************* +** Calculator.h ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2013 Martin Gieseking <martin.gieseking@uos.de> ** +** ** +** This program is free software; you can redistribute it and/or ** +** modify it under the terms of the GNU General Public License as ** +** published by the Free Software Foundation; either version 3 of ** +** the License, or (at your option) any later version. ** +** ** +** This program is distributed in the hope that it will be useful, but ** +** WITHOUT ANY WARRANTY; without even the implied warranty of ** +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** +** GNU General Public License for more details. ** +** ** +** You should have received a copy of the GNU General Public License ** +** along with this program; if not, see <http://www.gnu.org/licenses/>. ** +*************************************************************************/ + +#ifndef CALCULATOR_H +#define CALCULATOR_H + +#include <istream> +#include <map> +#include <string> +#include "MessageException.h" + + +struct CalculatorException : public MessageException +{ + CalculatorException (const std::string &msg) : MessageException(msg) {} +}; + +class Calculator +{ + public: + Calculator () : _numValue(0) {} + double eval (std::istream &is); + double eval (const std::string &expr); + void setVariable (const std::string &name, double value) {_variables[name] = value;} + double getVariable (const std::string &name) const; + + protected: + double expr (std::istream &is, bool skip); + double term (std::istream &is, bool skip); + double prim (std::istream &is, bool skip); + char lex (std::istream &is); + char lookAhead (std::istream &is); + + private: + std::map<std::string,double> _variables; + double _numValue; + std::string _strValue; +}; + +#endif |