1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "curl_setup.h"
26
27 #ifndef HAVE_STRTOK_R
28 #include <stddef.h>
29
30 #include "strtok.h"
31
32 char *
Curl_strtok_r(char * ptr,const char * sep,char ** end)33 Curl_strtok_r(char *ptr, const char *sep, char **end)
34 {
35 if(!ptr)
36 /* we got NULL input so then we get our last position instead */
37 ptr = *end;
38
39 /* pass all letters that are including in the separator string */
40 while(*ptr && strchr(sep, *ptr))
41 ++ptr;
42
43 if(*ptr) {
44 /* so this is where the next piece of string starts */
45 char *start = ptr;
46
47 /* set the end pointer to the first byte after the start */
48 *end = start + 1;
49
50 /* scan through the string to find where it ends, it ends on a
51 null byte or a character that exists in the separator string */
52 while(**end && !strchr(sep, **end))
53 ++*end;
54
55 if(**end) {
56 /* the end is not a null byte */
57 **end = '\0'; /* null-terminate it! */
58 ++*end; /* advance the last pointer to beyond the null byte */
59 }
60
61 return start; /* return the position where the string starts */
62 }
63
64 /* we ended up on a null byte, there are no more strings to find! */
65 return NULL;
66 }
67
68 #endif /* this was only compiled if strtok_r wasn't present */
69
