xref: /libuv/src/strtok.c (revision 2a31fe85)
1 /* Copyright libuv project contributors. All rights reserved.
2  *
3  * Permission is hereby granted, free of charge, to any person obtaining a copy
4  * of this software and associated documentation files (the "Software"), to
5  * deal in the Software without restriction, including without limitation the
6  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7  * sell copies of the Software, and to permit persons to whom the Software is
8  * furnished to do so, subject to the following conditions:
9  *
10  * The above copyright notice and this permission notice shall be included in
11  * all copies or substantial portions of the Software.
12  *
13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19  * IN THE SOFTWARE.
20  */
21 
22 #include <stdlib.h>
23 #include "strtok.h"
24 
uv__strtok(char * str,const char * sep,char ** itr)25 char* uv__strtok(char* str, const char* sep, char** itr) {
26   const char* sep_itr;
27   char* tmp;
28   char* start;
29 
30   if (str == NULL)
31     start = tmp = *itr;
32   else
33     start = tmp = str;
34 
35   if (tmp == NULL)
36     return NULL;
37 
38   while (*tmp != '\0') {
39     sep_itr = sep;
40     while (*sep_itr != '\0') {
41       if (*tmp == *sep_itr) {
42         *itr = tmp + 1;
43         *tmp = '\0';
44         return start;
45       }
46       sep_itr++;
47     }
48     tmp++;
49   }
50   *itr = NULL;
51   return start;
52 }
53