summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvisvgm/dvisvgm-0.8.7/src/Calculator.h
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-0.8.7/src/Calculator.h')
-rw-r--r--Build/source/texk/dvisvgm/dvisvgm-0.8.7/src/Calculator.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-0.8.7/src/Calculator.h b/Build/source/texk/dvisvgm/dvisvgm-0.8.7/src/Calculator.h
new file mode 100644
index 00000000000..a8673a99c1f
--- /dev/null
+++ b/Build/source/texk/dvisvgm/dvisvgm-0.8.7/src/Calculator.h
@@ -0,0 +1,59 @@
+/*************************************************************************
+** Calculator.h **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2009 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"
+
+using std::istream;
+using std::map;
+using std::string;
+
+struct CalculatorException : public MessageException
+{
+ CalculatorException (const string &msg) : MessageException(msg) {}
+};
+
+class Calculator
+{
+ public:
+ double eval (istream &is);
+ double eval (const string &expr);
+ void setVariable (const string &name, double value) {variables[name] = value;}
+ double getVariable (const string &name) const;
+
+ protected:
+ double expr (istream &is, bool skip);
+ double term (istream &is, bool skip);
+ double prim (istream &is, bool skip);
+ char lex (istream &is);
+ char lookAhead (istream &is);
+
+ private:
+ map<string,double> variables;
+ double numValue;
+ string strValue;
+};
+
+#endif