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9a7f65a3 JI |
1 | #ifndef _BABELTRACE_COMPAT_STRING_H |
2 | #define _BABELTRACE_COMPAT_STRING_H | |
3 | ||
4 | /* | |
5 | * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
23 | * SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <string.h> | |
832a0779 | 27 | #include <stdlib.h> |
9a7f65a3 | 28 | |
832a0779 MJ |
29 | #ifdef HAVE_STRNLEN |
30 | static inline | |
31 | size_t bt_strnlen(const char *str, size_t max) | |
32 | { | |
33 | return strnlen(str, max); | |
34 | } | |
35 | #else | |
36 | static inline | |
37 | size_t bt_strnlen(const char *str, size_t max) | |
38 | { | |
39 | size_t ret; | |
40 | const char *end; | |
41 | ||
42 | end = memchr(str, 0, max); | |
43 | ||
44 | if (end) { | |
45 | ret = (size_t) (end - str); | |
46 | } else { | |
47 | ret = max; | |
48 | } | |
49 | ||
50 | return ret; | |
51 | } | |
52 | #endif /* HAVE_STRNLEN */ | |
53 | ||
54 | #ifdef HAVE_STRNDUP | |
55 | static inline | |
56 | char *bt_strndup(const char *s, size_t n) | |
57 | { | |
58 | return strndup(s, n); | |
59 | } | |
60 | #else | |
61 | static inline | |
62 | char *bt_strndup(const char *s, size_t n) | |
63 | { | |
64 | char *ret; | |
65 | size_t navail; | |
66 | ||
67 | if (!s) { | |
68 | ret = NULL; | |
69 | goto end; | |
70 | } | |
71 | ||
72 | /* min() */ | |
73 | navail = strlen(s) + 1; | |
74 | if ((n + 1) < navail) { | |
75 | navail = n + 1; | |
76 | } | |
77 | ||
78 | ret = malloc(navail); | |
79 | if (!ret) { | |
80 | goto end; | |
81 | } | |
82 | ||
83 | memcpy(ret, s, navail); | |
84 | ret[navail - 1] = '\0'; | |
85 | end: | |
86 | return ret; | |
87 | } | |
88 | #endif /* HAVE_STRNDUP */ | |
89 | ||
9a7f65a3 | 90 | #endif /* _BABELTRACE_COMPAT_STRING_H */ |