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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.
*
*/
#include <stdlib.h>
#include "cppvalue.h"
#include "constexp.h"
CPPValue parseOctal(const std::string& token)
{
long val = 0;
for (const char *p = token.c_str(); *p != 0; p++)
{
if (*p >= '0' && *p <= '7') val = val * 8 + *p - '0';
}
return CPPValue(val);
}
CPPValue parseDecimal(const std::string& token)
{
long val = 0;
for (const char *p = token.c_str(); *p != 0; p++)
{
if (*p >= '0' && *p <= '9') val = val * 10 + *p - '0';
}
return CPPValue(val);
}
CPPValue parseHexadecimal(const std::string& token)
{
long val = 0;
for (const char *p = token.c_str(); *p != 0; p++)
{
if (*p >= '0' && *p <= '9') val = val * 16 + *p - '0';
else if (*p >= 'a' && *p <= 'f') val = val * 16 + *p - 'a' + 10;
else if (*p >= 'A' && *p <= 'F') val = val * 16 + *p - 'A' + 10;
}
//printf("parseHexadecimal %s->%x\n",token.data(),val);
return CPPValue(val);
}
CPPValue parseCharacter(const std::string& token) // does not work for '\n' and the alike
{
if (token[1]=='\\')
{
switch(token[2])
{
case 'n': return CPPValue((long)'\n');
case 't': return CPPValue((long)'\t');
case 'v': return CPPValue((long)'\v');
case 'b': return CPPValue((long)'\b');
case 'r': return CPPValue((long)'\r');
case 'f': return CPPValue((long)'\f');
case 'a': return CPPValue((long)'\a');
case '\\': return CPPValue((long)'\\');
case '?': return CPPValue((long)'\?');
case '\'': return CPPValue((long)'\'');
case '"': return CPPValue((long)'"');
case '0': // fall through
case '1': // fall through
case '2': // fall through
case '3': // fall through
case '4': // fall through
case '5': // fall through
case '6': // fall through
case '7': // fall through
return parseOctal(token);
case 'x':
case 'X': return parseHexadecimal(token);
default: printf("Invalid escape sequence %s found!\n",token.data());
return CPPValue(0L);
}
}
return CPPValue((long)token[1]);
}
CPPValue parseFloat(const std::string& token)
{
return CPPValue(std::stod(token));
}
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