1 /*-

     2  * Copyright (c) 1990, 1993

     3  *	The Regents of the University of California.  All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  * 1. Redistributions of source code must retain the above copyright

     9  *    notice, this list of conditions and the following disclaimer.

    10  * 2. Redistributions in binary form must reproduce the above copyright

    11  *    notice, this list of conditions and the following disclaimer in the

    12  *    documentation and/or other materials provided with the distribution.

    13  * 4. Neither the name of the University nor the names of its contributors

    14  *    may be used to endorse or promote products derived from this software

    15  *    without specific prior written permission.

    16  *

    17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

    18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

    21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

    22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

    23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

    25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

    26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

    27  * SUCH DAMAGE.

    28  * © Portions copyright (c) 2005-2006  Nokia Corporation.  All rights reserved.

    29  */

    30 

    31 #if defined(LIBC_SCCS) && !defined(lint)

    32 static char sccsid[] = "@(#)strsep.c	8.1 (Berkeley) 6/4/93";

    33 #endif /* LIBC_SCCS and not lint */

    34 #include <sys/cdefs.h>

    35 #ifndef __SYMBIAN32__

    36 __FBSDID("$FreeBSD: src/lib/libc/string/strsep.c,v 1.5 2002/03/21 18:44:54 obrien Exp $");

    37 #endif

    38 

    39 #include <string.h>

    40 #include <stdio.h>

    41 

    42 /*

    43  * Get next token from string *stringp, where tokens are possibly-empty

    44  * strings separated by characters from delim.

    45  *

    46  * Writes NULs into the string at *stringp to end tokens.

    47  * delim need not remain constant from call to call.

    48  * On return, *stringp points past the last NUL written (if there might

    49  * be further tokens), or is NULL (if there are definitely no more tokens).

    50  *

    51  * If *stringp is NULL, strsep returns NULL.

    52  */

    53 EXPORT_C char *

    54 strsep(char **stringp,

    55 	const char *delim)

    56 	

    57 {

    58 	char *s;

    59 	const char *spanp;

    60 	int c, sc;

    61 	char *tok;

    62 

    63 	if ((s = *stringp) == NULL)

    64 		return (NULL);

    65 	for (tok = s;;) {

    66 		c = *s++;

    67 		spanp = delim;

    68 		do {

    69 			if ((sc = *spanp++) == c) {

    70 				if (c == 0)

    71 					s = NULL;

    72 				else

    73 					s[-1] = 0;

    74 				*stringp = s;

    75 				return (tok);

    76 			}

    77 		} while (sc != 0);

    78 	}

    79 	/* NOTREACHED */

    80 }