aboutsummaryrefslogtreecommitdiff
path: root/libbb/safe_strtol.c
blob: ecc1667db823be8af5d59c9b1c1cdec03f234480 (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
/* vi: set sw=4 ts=4: */
/*
 * Utility routines.
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include "libbb.h"

#ifdef L_safe_strtoi
int safe_strtoi(char *arg, int* value)
{
	int error;
	long lvalue = *value;
	error = safe_strtol(arg, &lvalue);
	*value = (int) lvalue;
	return error;
}
#endif

#ifdef L_safe_strtod
int safe_strtod(char *arg, double* value)
{
	char *endptr;
	int errno_save = errno;

	assert(arg!=NULL);
	errno = 0;
	*value = strtod(arg, &endptr);
	if (errno != 0 || *endptr!='\0' || endptr==arg) {
		return 1;
	}
	errno = errno_save;
	return 0;
}
#endif

#ifdef L_safe_strtol
int safe_strtol(char *arg, long* value)
{
	char *endptr;
	int errno_save = errno;

	assert(arg!=NULL);
	errno = 0;
	*value = strtol(arg, &endptr, 0);
	if (errno != 0 || *endptr!='\0' || endptr==arg) {
		return 1;
	}
	errno = errno_save;
	return 0;
}
#endif

#ifdef L_safe_strtoul
int safe_strtoul(char *arg, unsigned long* value)
{
	char *endptr;
	int errno_save = errno;

	assert(arg!=NULL);
	errno = 0;
	*value = strtoul(arg, &endptr, 0);
	if (errno != 0 || *endptr!='\0' || endptr==arg) {
		return 1;
	}
	errno = errno_save;
	return 0;
}
#endif