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
|
/* safe-atoi.c -- checked string-to-int conversion.
Copyright (C) 2007-2019 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>.
*/
/* config.h must be included first. */
#include <config.h>
/* system headers. */
#include <errno.h>
#include <limits.h>
#include <stdlib.h>
/* gnulib headers. */
#include "quotearg.h"
/* find headers. */
#include "system.h"
#include "die.h"
#include "safe-atoi.h"
int
safe_atoi (const char *s, enum quoting_style style)
{
long lval;
char *end;
errno = 0;
lval = strtol (s, &end, 10);
if ( (LONG_MAX == lval) || (LONG_MIN == lval) )
{
/* max/min possible value, or an error. */
if (errno == ERANGE)
{
/* too big, or too small. */
die (EXIT_FAILURE, errno, "%s", s);
}
else
{
/* not a valid number */
die (EXIT_FAILURE, errno, "%s", s);
}
/* Otherwise, we do a range check against INT_MAX and INT_MIN
* below.
*/
}
if (lval > INT_MAX || lval < INT_MIN)
{
/* The number was in range for long, but not int. */
errno = ERANGE;
die (EXIT_FAILURE, errno, "%s", s);
}
else if (*end)
{
die (EXIT_FAILURE, errno, _("Unexpected suffix %s on %s"),
quotearg_n_style (0, style, end),
quotearg_n_style (1, style, s));
}
else if (end == s)
{
die (EXIT_FAILURE, errno, _("Expected an integer: %s"),
quotearg_n_style (0, style, s));
}
return (int)lval;
}
|
