blob: ab2a1d409906e481441902f26c0dbbe3337064d9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/******************************************************************************
*
* $Id$
*
*
* Copyright (C) 1997-1999 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.
*
* All output generated with Doxygen is not covered by this license.
*
*/
#include <stdlib.h>
#include "cppvalue.h"
#include "constexp.h"
CPPValue parseOctal()
{
long val = 0;
for (const char *p = strToken.data(); *p != 0; p++)
{
if (*p >= '0' && *p <= '7') val = val * 8 + *p - '0';
}
return CPPValue(val);
}
CPPValue parseDecimal()
{
long val = 0;
for (const char *p = strToken.data(); *p != 0; p++)
{
if (*p >= '0' && *p <= '9') val = val * 10 + *p - '0';
}
return CPPValue(val);
}
CPPValue parseHexadecimal()
{
long val = 0;
for (const char *p = strToken.data(); *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;
}
return CPPValue(val);
}
CPPValue parseCharacter() // does not work for '\n' and the alike
{
if (strToken[1]=='\\')
{
switch(strToken[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': return parseOctal();
case 'x':
case 'X': return parseHexadecimal();
default: printf("Invalid escape sequence %s found!\n",strToken.data());
return CPPValue(0L);
}
}
return CPPValue((long)strToken[1]);
}
CPPValue parseFloat()
{
return CPPValue(atof(strToken));
}
|
