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
27APR_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