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