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/******************************************************************************
*
* Copyright (C) 1997-2021 by Dimitri van Heesch.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation under the terms of the GNU General Public License is hereby
* granted. No representations are made about the suitability of this software
* for any purpose. It is provided "as is" without express or implied warranty.
* See the GNU General Public License for more details.
*
* Documents produced by Doxygen are derivative works derived from the
* input used in their production; they are not affected by this license.
*
*/
#ifndef CPPVALUE_H
#define CPPVALUE_H
#include <cstdio>
#include <string>
/** A class representing a C-preprocessor value. */
class CPPValue
{
public:
enum Type { Int, Float };
explicit CPPValue(char c) : type(Int) { v.l = c; }
explicit CPPValue(long val=0) : type(Int) { v.l = val; }
explicit CPPValue(double val) : type(Float) { v.d = val; }
operator double () const { return type==Int ? static_cast<double>(v.l) : v.d; }
operator long () const { return type==Int ? v.l : static_cast<long>(v.d); }
bool isInt() const { return type == Int; }
void print() const
{
if (type==Int)
printf("(%ld)\n",v.l);
else
printf("(%f)\n",v.d);
}
private:
Type type;
union {
double d;
long l;
} v;
};
extern CPPValue parseOctal(const std::string& token);
extern CPPValue parseDecimal(const std::string& token);
extern CPPValue parseHexadecimal(const std::string& token);
extern CPPValue parseBinary(const std::string& token);
extern CPPValue parseCharacter(const std::string& token);
extern CPPValue parseFloat(const std::string& token);
#endif
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