blob: 9d53c6e5c7105f57534b9b27833b68f505d5ee94 (
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
|
#define _GNU_SOURCE
#include "kerncompat.h"
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#if BTRFS_FLAT_INCLUDES
#else
#endif /* BTRFS_FLAT_INCLUDES */
/*
* This function should be only used when parsing command arg, it won't return
* error to its caller and rather exit directly just like usage().
*/
u64 arg_strtou64(const char *str)
{
u64 value;
char *ptr_parse_end = NULL;
value = strtoull(str, &ptr_parse_end, 0);
if (ptr_parse_end && *ptr_parse_end != '\0') {
fprintf(stderr, "ERROR: %s is not a valid numeric value.\n",
str);
exit(1);
}
/*
* if we pass a negative number to strtoull, it will return an
* unexpected number to us, so let's do the check ourselves.
*/
if (str[0] == '-') {
fprintf(stderr, "ERROR: %s: negative value is invalid.\n",
str);
exit(1);
}
if (value == ULLONG_MAX) {
fprintf(stderr, "ERROR: %s is too large.\n", str);
exit(1);
}
return value;
}
|
