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1 office 1 /**
2 * @file strdup.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * @section DESCRIPTION
30 *
31 * Allocate memory for a string and copy it there.
32 */
33  
34 #ifndef BADVPN_STRDUP_H
35 #define BADVPN_STRDUP_H
36  
37 #include <string.h>
38 #include <stdlib.h>
39 #include <limits.h>
40  
41 #include <misc/debug.h>
42  
43 /**
44 * Allocate and copy a null-terminated string.
45 */
46 static char * b_strdup (const char *str)
47 {
48 ASSERT(str)
49  
50 size_t len = strlen(str);
51  
52 char *s = (char *)malloc(len + 1);
53 if (!s) {
54 return NULL;
55 }
56  
57 memcpy(s, str, len + 1);
58  
59 return s;
60 }
61  
62 /**
63 * Allocate memory for a null-terminated string and use the
64 * given data as its contents. A null terminator is appended
65 * after the specified data.
66 */
67 static char * b_strdup_bin (const char *str, size_t len)
68 {
69 ASSERT(str)
70  
71 if (len == SIZE_MAX) {
72 return NULL;
73 }
74  
75 char *s = (char *)malloc(len + 1);
76 if (!s) {
77 return NULL;
78 }
79  
80 memcpy(s, str, len);
81 s[len] = '\0';
82  
83 return s;
84 }
85  
86 #endif