11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 4. Neither the name of the University nor the names of its contributors 141573Srgrimes * may be used to endorse or promote products derived from this software 151573Srgrimes * without specific prior written permission. 161573Srgrimes * 171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271573Srgrimes * SUCH DAMAGE. 281573Srgrimes */ 291573Srgrimes 3086170Sobrien#if defined(LIBC_SCCS) && !defined(lint) 3186170Sobrienstatic char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93"; 3286170Sobrien#endif /* LIBC_SCCS and not lint */ 331573Srgrimes#include <sys/cdefs.h> 3486170Sobrien__FBSDID("$FreeBSD$"); 3586170Sobrien 36104799Srwatson#include <sys/param.h> 37104799Srwatson#include <sys/libkern.h> 381573Srgrimes 391573Srgrimes/* 401573Srgrimes * Get next token from string *stringp, where tokens are possibly-empty 418870Srgrimes * strings separated by characters from delim. 421573Srgrimes * 431573Srgrimes * Writes NULs into the string at *stringp to end tokens. 441573Srgrimes * delim need not remain constant from call to call. 451573Srgrimes * On return, *stringp points past the last NUL written (if there might 461573Srgrimes * be further tokens), or is NULL (if there are definitely no more tokens). 471573Srgrimes * 481573Srgrimes * If *stringp is NULL, strsep returns NULL. 491573Srgrimes */ 501573Srgrimeschar * 511573Srgrimesstrsep(stringp, delim) 5292889Sobrien char **stringp; 5392889Sobrien const char *delim; 541573Srgrimes{ 5592889Sobrien char *s; 5692889Sobrien const char *spanp; 5792889Sobrien int c, sc; 581573Srgrimes char *tok; 591573Srgrimes 601573Srgrimes if ((s = *stringp) == NULL) 611573Srgrimes return (NULL); 621573Srgrimes for (tok = s;;) { 631573Srgrimes c = *s++; 641573Srgrimes spanp = delim; 651573Srgrimes do { 661573Srgrimes if ((sc = *spanp++) == c) { 671573Srgrimes if (c == 0) 681573Srgrimes s = NULL; 691573Srgrimes else 701573Srgrimes s[-1] = 0; 711573Srgrimes *stringp = s; 721573Srgrimes return (tok); 731573Srgrimes } 741573Srgrimes } while (sc != 0); 751573Srgrimes } 761573Srgrimes /* NOTREACHED */ 771573Srgrimes} 78