1*b811a51aSVladimir Kotal /* 2*b811a51aSVladimir Kotal * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3*b811a51aSVladimir Kotal * Use is subject to license terms. 4*b811a51aSVladimir Kotal */ 5*b811a51aSVladimir Kotal 6*b811a51aSVladimir Kotal /* $OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $ */ 7*b811a51aSVladimir Kotal 8*b811a51aSVladimir Kotal /* 9*b811a51aSVladimir Kotal * Copyright (c) 1990, 1993 10*b811a51aSVladimir Kotal * The Regents of the University of California. All rights reserved. 11*b811a51aSVladimir Kotal * 12*b811a51aSVladimir Kotal * Redistribution and use in source and binary forms, with or without 13*b811a51aSVladimir Kotal * modification, are permitted provided that the following conditions 14*b811a51aSVladimir Kotal * are met: 15*b811a51aSVladimir Kotal * 1. Redistributions of source code must retain the above copyright 16*b811a51aSVladimir Kotal * notice, this list of conditions and the following disclaimer. 17*b811a51aSVladimir Kotal * 2. Redistributions in binary form must reproduce the above copyright 18*b811a51aSVladimir Kotal * notice, this list of conditions and the following disclaimer in the 19*b811a51aSVladimir Kotal * documentation and/or other materials provided with the distribution. 20*b811a51aSVladimir Kotal * 3. All advertising materials mentioning features or use of this software 21*b811a51aSVladimir Kotal * must display the following acknowledgement: 22*b811a51aSVladimir Kotal * This product includes software developed by the University of 23*b811a51aSVladimir Kotal * California, Berkeley and its contributors. 24*b811a51aSVladimir Kotal * 4. Neither the name of the University nor the names of its contributors 25*b811a51aSVladimir Kotal * may be used to endorse or promote products derived from this software 26*b811a51aSVladimir Kotal * without specific prior written permission. 27*b811a51aSVladimir Kotal * 28*b811a51aSVladimir Kotal * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29*b811a51aSVladimir Kotal * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30*b811a51aSVladimir Kotal * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31*b811a51aSVladimir Kotal * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32*b811a51aSVladimir Kotal * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33*b811a51aSVladimir Kotal * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34*b811a51aSVladimir Kotal * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35*b811a51aSVladimir Kotal * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36*b811a51aSVladimir Kotal * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37*b811a51aSVladimir Kotal * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38*b811a51aSVladimir Kotal * SUCH DAMAGE. 39*b811a51aSVladimir Kotal */ 40*b811a51aSVladimir Kotal 41*b811a51aSVladimir Kotal #include "lint.h" 42*b811a51aSVladimir Kotal #include <string.h> 43*b811a51aSVladimir Kotal #include <stdio.h> 44*b811a51aSVladimir Kotal 45*b811a51aSVladimir Kotal #if defined(LIBC_SCCS) && !defined(lint) 46*b811a51aSVladimir Kotal #if 0 47*b811a51aSVladimir Kotal static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93"; 48*b811a51aSVladimir Kotal #else 49*b811a51aSVladimir Kotal static char *rcsid = 50*b811a51aSVladimir Kotal "$OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $"; 51*b811a51aSVladimir Kotal #endif 52*b811a51aSVladimir Kotal #endif /* LIBC_SCCS and not lint */ 53*b811a51aSVladimir Kotal 54*b811a51aSVladimir Kotal /* 55*b811a51aSVladimir Kotal * Get next token from string *stringp, where tokens are possibly-empty 56*b811a51aSVladimir Kotal * strings separated by characters from delim. 57*b811a51aSVladimir Kotal * 58*b811a51aSVladimir Kotal * Writes NULs into the string at *stringp to end tokens. 59*b811a51aSVladimir Kotal * delim need not remain constant from call to call. 60*b811a51aSVladimir Kotal * On return, *stringp points past the last NUL written (if there might 61*b811a51aSVladimir Kotal * be further tokens), or is NULL (if there are definitely no more tokens). 62*b811a51aSVladimir Kotal * 63*b811a51aSVladimir Kotal * If *stringp is NULL, strsep returns NULL. 64*b811a51aSVladimir Kotal */ 65*b811a51aSVladimir Kotal char * 66*b811a51aSVladimir Kotal strsep(char **stringp, const char *delim) 67*b811a51aSVladimir Kotal { 68*b811a51aSVladimir Kotal register char *s; 69*b811a51aSVladimir Kotal register const char *spanp; 70*b811a51aSVladimir Kotal register int c, sc; 71*b811a51aSVladimir Kotal char *tok; 72*b811a51aSVladimir Kotal 73*b811a51aSVladimir Kotal if ((s = *stringp) == NULL) 74*b811a51aSVladimir Kotal return (NULL); 75*b811a51aSVladimir Kotal for (tok = s; ; ) { 76*b811a51aSVladimir Kotal c = *s++; 77*b811a51aSVladimir Kotal spanp = delim; 78*b811a51aSVladimir Kotal do { 79*b811a51aSVladimir Kotal if ((sc = *spanp++) == c) { 80*b811a51aSVladimir Kotal if (c == 0) 81*b811a51aSVladimir Kotal s = NULL; 82*b811a51aSVladimir Kotal else 83*b811a51aSVladimir Kotal s[-1] = 0; 84*b811a51aSVladimir Kotal *stringp = s; 85*b811a51aSVladimir Kotal return (tok); 86*b811a51aSVladimir Kotal } 87*b811a51aSVladimir Kotal } while (sc != 0); 88*b811a51aSVladimir Kotal } 89*b811a51aSVladimir Kotal /* NOTREACHED */ 90*b811a51aSVladimir Kotal } 91