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>
27 #include <stdlib.h>
28
29 #ifdef HAVE_STRNLEN
30 static inline
bt_strnlen(const char * str,size_t max)31 size_t bt_strnlen(const char *str, size_t max)
32 {
33 return strnlen(str, max);
34 }
35 #else
36 static inline
bt_strnlen(const char * str,size_t max)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
bt_strndup(const char * s,size_t n)56 char *bt_strndup(const char *s, size_t n)
57 {
58 return strndup(s, n);
59 }
60 #else
61 static inline
bt_strndup(const char * s,size_t n)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
90 #endif /* _BABELTRACE_COMPAT_STRING_H */
91