/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id: strtok.c,v 1.13 2004/01/29 13:56:45 bagder Exp $
 ***************************************************************************/

#include "setup.h"

#ifndef HAVE_STRTOK_R
#include <stddef.h>
#include <string.h>

#include "strtok.h"

char *
Curl_strtok_r( char *ptr, const char *sep, char **end ) {
	if ( !ptr ) {
		/* we got NULL input so then we get our last position instead */
		ptr = *end;
	}

	/* pass all letters that are including in the separator string */
	while ( *ptr && strchr( sep, *ptr ) )
		++ptr;

	if ( *ptr ) {
		/* so this is where the next piece of string starts */
		char *start = ptr;

		/* set the end pointer to the first byte after the start */
		*end = start + 1;

		/* scan through the string to find where it ends, it ends on a
		   null byte or a character that exists in the separator string */
		while ( **end && !strchr( sep, **end ) )
			++ * end;

		if ( **end ) {
			/* the end is not a null byte */
			**end = '\0'; /* zero terminate it! */
			++ * end; /* advance the last pointer to beyond the null byte */
		}

		return start; /* return the position where the string starts */
	}

	/* we ended up on a null byte, there are no more strings to find! */
	return NULL;
}

#endif /* this was only compiled if strtok_r wasn't present */
