[openssh.git] / openbsd-compat / strsep.c

/*	$OpenBSD: strsep.c,v 1.4 2003/06/02 20:18:38 millert Exp $	*/

/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "includes.h"

#if !defined(HAVE_STRSEP)

#include <string.h>
#include <stdio.h>

#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)strsep.c	8.1 (Berkeley) 6/4/93";
#else
static char *rcsid = "$OpenBSD: strsep.c,v 1.4 2003/06/02 20:18:38 millert Exp $";
#endif
#endif /* LIBC_SCCS and not lint */

/*
 * Get next token from string *stringp, where tokens are possibly-empty
 * strings separated by characters from delim.  
 *
 * Writes NULs into the string at *stringp to end tokens.
 * delim need not remain constant from call to call.
 * On return, *stringp points past the last NUL written (if there might
 * be further tokens), or is NULL (if there are definitely no more tokens).
 *
 * If *stringp is NULL, strsep returns NULL.
 */
char *
strsep(char **stringp, const char *delim)
{
	register char *s;
	register const char *spanp;
	register int c, sc;
	char *tok;

	if ((s = *stringp) == NULL)
		return (NULL);
	for (tok = s;;) {
		c = *s++;
		spanp = delim;
		do {
			if ((sc = *spanp++) == c) {
				if (c == 0)
					s = NULL;
				else
					s[-1] = 0;
				*stringp = s;
				return (tok);
			}
		} while (sc != 0);
	}
	/* NOTREACHED */
}

#endif /* !defined(HAVE_STRSEP) */
Commit	Line	Data
3e67f7df	1	/* $OpenBSD: strsep.c,v 1.4 2003/06/02 20:18:38 millert Exp $ */
229f64ee	2
	3	/*-
	4	* Copyright (c) 1990, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
3e67f7df	15	* 3. Neither the name of the University nor the names of its contributors
229f64ee	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
17962c40	32	#include "includes.h"
229f64ee	33
	34	#if !defined(HAVE_STRSEP)
	35
	36	#include <string.h>
	37	#include <stdio.h>
	38
	39	#if defined(LIBC_SCCS) && !defined(lint)
	40	#if 0
	41	static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93";
	42	#else
3e67f7df	43	static char *rcsid = "$OpenBSD: strsep.c,v 1.4 2003/06/02 20:18:38 millert Exp $";
229f64ee	44	#endif
	45	#endif /* LIBC_SCCS and not lint */
	46
	47	/*
	48	* Get next token from string *stringp, where tokens are possibly-empty
	49	* strings separated by characters from delim.
	50	*
	51	* Writes NULs into the string at *stringp to end tokens.
	52	* delim need not remain constant from call to call.
	53	* On return, *stringp points past the last NUL written (if there might
	54	* be further tokens), or is NULL (if there are definitely no more tokens).
	55	*
	56	* If *stringp is NULL, strsep returns NULL.
	57	*/
	58	char *
	59	strsep(char *stringp, const char delim)
	60	{
	61	register char *s;
	62	register const char *spanp;
	63	register int c, sc;
	64	char *tok;
	65
	66	if ((s = *stringp) == NULL)
	67	return (NULL);
	68	for (tok = s;;) {
	69	c = *s++;
	70	spanp = delim;
	71	do {
	72	if ((sc = *spanp++) == c) {
	73	if (c == 0)
	74	s = NULL;
	75	else
	76	s[-1] = 0;
	77	*stringp = s;
	78	return (tok);
	79	}
	80	} while (sc != 0);
	81	}
	82	/* NOTREACHED */
	83	}
	84
	85	#endif /* !defined(HAVE_STRSEP) */