/* Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifdef HAVE_STDDEF_H

#include <stddef.h>        /* for NULL */

#endif

#include "apr.h"

#include "apr_strings.h"

#define APR_WANT_STRFUNC   /* for strchr() */

#include "apr_want.h"

APR_DECLARE(char *) apr_strtok(char *str, const char *sep, char **last)

{

    char *token;

    if (!str)           /* subsequent call */

        str = *last;    /* start where we left off */

    /* skip characters in sep (will terminate at '\0') */

    while (*str && strchr(sep, *str))

        ++str;

    if (!*str)          /* no more tokens */

        return NULL;

    token = str;

    /* skip valid token characters to terminate token and

     * prepare for the next call (will terminate at '\0)

     */

    *last = token + 1;

    while (**last && !strchr(sep, **last))

        ++*last;

    if (**last) {

        **last = '\0';

        ++*last;

    }

    return token;

}