1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifdef HAVE_STDDEF_H
18 #include <stddef.h> /* for NULL */
19 #endif
20
21 #include "apr.h"
22 #include "apr_strings.h"
23
24 #define APR_WANT_STRFUNC /* for strchr() */
25 #include "apr_want.h"
26
apr_strtok(char * str,const char * sep,char ** last)27 APR_DECLARE(char *) apr_strtok(char *str, const char *sep, char **last)
28 {
29 char *token;
30
31 if (!str) /* subsequent call */
32 str = *last; /* start where we left off */
33
34 /* skip characters in sep (will terminate at '\0') */
35 while (*str && strchr(sep, *str))
36 ++str;
37
38 if (!*str) /* no more tokens */
39 return NULL;
40
41 token = str;
42
43 /* skip valid token characters to terminate token and
44 * prepare for the next call (will terminate at '\0)
45 */
46 *last = token + 1;
47 while (**last && !strchr(sep, **last))
48 ++*last;
49
50 if (**last) {
51 **last = '\0';
52 ++*last;
53 }
54
55 return token;
56 }
57