1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2011 Erwan Velu - All Rights Reserved
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * -----------------------------------------------------------------------
27 */
28
29 #include <string.h>
30 #include <stdlib.h>
31
strreplace(const char * string,const char * string_to_replace,const char * string_to_insert)32 char *strreplace(const char *string, const char *string_to_replace,
33 const char *string_to_insert)
34 {
35 char *token = NULL;
36 char *out = NULL;
37
38 size_t slen, srlen, silen;
39
40 token = strstr(string, string_to_replace);
41 if (!token)
42 return strdup(string);
43
44 slen = strlen(string);
45 srlen = strlen(string_to_replace);
46 silen = strlen(string_to_insert);
47
48 out = malloc(slen - srlen + silen + 1);
49 if (!out)
50 return NULL;
51
52 memcpy(out, string, token - string);
53 memcpy(out + (token - string), string_to_insert, silen);
54 memcpy(out + (token - string) + silen, token + srlen,
55 slen - srlen - (token - string) + 1);
56
57 return out;
58 }
59