]>
Commit | Line | Data |
---|---|---|
7d85c434 WN |
1 | /* |
2 | * linux/tools/lib/string.c | |
3 | * | |
4 | * Copied from linux/lib/string.c, where it is: | |
5 | * | |
6 | * Copyright (C) 1991, 1992 Linus Torvalds | |
7 | * | |
8 | * More specifically, the first copied function was strtobool, which | |
9 | * was introduced by: | |
10 | * | |
11 | * d0f1fed29e6e ("Add a strtobool function matching semantics of existing in kernel equivalents") | |
12 | * Author: Jonathan Cameron <jic23@cam.ac.uk> | |
13 | */ | |
14 | ||
4ddd3274 ACM |
15 | #include <stdlib.h> |
16 | #include <string.h> | |
7d85c434 | 17 | #include <errno.h> |
4ddd3274 ACM |
18 | #include <linux/string.h> |
19 | ||
20 | /** | |
21 | * memdup - duplicate region of memory | |
22 | * | |
23 | * @src: memory region to duplicate | |
24 | * @len: memory region length | |
25 | */ | |
26 | void *memdup(const void *src, size_t len) | |
27 | { | |
28 | void *p = malloc(len); | |
29 | ||
30 | if (p) | |
31 | memcpy(p, src, len); | |
32 | ||
33 | return p; | |
34 | } | |
7d85c434 WN |
35 | |
36 | /** | |
37 | * strtobool - convert common user inputs into boolean values | |
38 | * @s: input string | |
39 | * @res: result | |
40 | * | |
41 | * This routine returns 0 iff the first character is one of 'Yy1Nn0'. | |
42 | * Otherwise it will return -EINVAL. Value pointed to by res is | |
43 | * updated upon finding a match. | |
44 | */ | |
45 | int strtobool(const char *s, bool *res) | |
46 | { | |
47 | switch (s[0]) { | |
48 | case 'y': | |
49 | case 'Y': | |
50 | case '1': | |
51 | *res = true; | |
52 | break; | |
53 | case 'n': | |
54 | case 'N': | |
55 | case '0': | |
56 | *res = false; | |
57 | break; | |
58 | default: | |
59 | return -EINVAL; | |
60 | } | |
61 | return 0; | |
62 | } |