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