1 /* $NetBSD: strsep.c,v 1.1.1.1 2009/04/12 15:33:26 christos Exp $ */ 2 3 #if defined(LIBC_SCCS) && !defined(lint) 4 static const char sccsid[] = "strsep.c 8.1 (Berkeley) 6/4/93"; 5 static const char rcsid[] = "Id: strsep.c,v 1.2 2005/04/27 04:56:12 sra Exp"; 6 #endif /* LIBC_SCCS and not lint */ 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 "port_before.h" 42 #include <sys/cdefs.h> 43 #include <string.h> 44 #include <stdio.h> 45 #include "port_after.h" 46 47 #ifndef NEED_STRSEP 48 int __strsep_unneeded__; 49 #else 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 char *s; 65 const char *spanp; 66 int c, sc; 67 char *tok; 68 69 if ((s = *stringp) == NULL) 70 return (NULL); 71 for (tok = s;;) { 72 c = *s++; 73 spanp = delim; 74 do { 75 if ((sc = *spanp++) == c) { 76 if (c == 0) 77 s = NULL; 78 else 79 s[-1] = 0; 80 *stringp = s; 81 return (tok); 82 } 83 } while (sc != 0); 84 } 85 /* NOTREACHED */ 86 } 87 88 #endif /*NEED_STRSEP*/ 89 90 /*! \file */ 91