1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 #if defined(LIBC_SCCS) && !defined(lint) 35 static const char rcsid[] = 36 "@(#) $Header: /tcpdump/master/tcpdump/missing/strsep.c,v 1.3 2003/03/25 08:33:48 guy Exp $ (LBL)"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #ifdef HAVE_CONFIG_H 40 #include <config.h> 41 #endif 42 43 #include <tcpdump-stdinc.h> 44 45 #include <string.h> 46 47 /* 48 * Get next token from string *stringp, where tokens are possibly-empty 49 * strings separated by characters from delim. 50 * 51 * Writes NULs into the string at *stringp to end tokens. 52 * delim need not remain constant from call to call. 53 * On return, *stringp points past the last NUL written (if there might 54 * be further tokens), or is NULL (if there are definitely no more tokens). 55 * 56 * If *stringp is NULL, strsep returns NULL. 57 */ 58 char * 59 strsep(char **stringp, const char *delim) 60 { 61 register char *s; 62 register const char *spanp; 63 register int c, sc; 64 char *tok; 65 66 if ((s = *stringp) == NULL) 67 return (NULL); 68 for (tok = s;;) { 69 c = *s++; 70 spanp = delim; 71 do { 72 if ((sc = *spanp++) == c) { 73 if (c == 0) 74 s = NULL; 75 else 76 s[-1] = 0; 77 *stringp = s; 78 return (tok); 79 } 80 } while (sc != 0); 81 } 82 /* NOTREACHED */ 83 } 84