1 /* OPENBSD ORIGINAL: lib/libc/string/strsep.c */ 2 3 /* $OpenBSD: strsep.c,v 1.5 2003/06/11 21:08:16 deraadt Exp $ */ 4 5 /*- 6 * Copyright (c) 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "includes.h" 35 36 #if !defined(HAVE_STRSEP) 37 38 #include <string.h> 39 #include <stdio.h> 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 #if 0 43 static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93"; 44 #else 45 static char *rcsid = "$OpenBSD: strsep.c,v 1.5 2003/06/11 21:08:16 deraadt Exp $"; 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 /* 50 * Get next token from string *stringp, where tokens are possibly-empty 51 * strings separated by characters from delim. 52 * 53 * Writes NULs into the string at *stringp to end tokens. 54 * delim need not remain constant from call to call. 55 * On return, *stringp points past the last NUL written (if there might 56 * be further tokens), or is NULL (if there are definitely no more tokens). 57 * 58 * If *stringp is NULL, strsep returns NULL. 59 */ 60 char * 61 strsep(char **stringp, const char *delim) 62 { 63 char *s; 64 const char *spanp; 65 int c, sc; 66 char *tok; 67 68 if ((s = *stringp) == NULL) 69 return (NULL); 70 for (tok = s;;) { 71 c = *s++; 72 spanp = delim; 73 do { 74 if ((sc = *spanp++) == c) { 75 if (c == 0) 76 s = NULL; 77 else 78 s[-1] = 0; 79 *stringp = s; 80 return (tok); 81 } 82 } while (sc != 0); 83 } 84 /* NOTREACHED */ 85 } 86 87 #endif /* !defined(HAVE_STRSEP) */ 88