1/* $NetBSD: strsep.c,v 1.4 2005/05/16 08:51:51 lukem Exp $ */ 2/* from NetBSD: strsep.c,v 1.14 2003/08/07 16:43:52 agc Exp */ 3 4/*- 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include "tnftp.h" 34 35/* 36 * Get next token from string *stringp, where tokens are possibly-empty 37 * strings separated by characters from delim. 38 * 39 * Writes NULs into the string at *stringp to end tokens. 40 * delim need not remain constant from call to call. 41 * On return, *stringp points past the last NUL written (if there might 42 * be further tokens), or is NULL (if there are definitely no more tokens). 43 * 44 * If *stringp is NULL, strsep returns NULL. 45 */ 46char * 47strsep(char **stringp, const char *delim) 48{ 49 char *s; 50 const char *spanp; 51 int c, sc; 52 char *tok; 53 54 if ((s = *stringp) == NULL) 55 return (NULL); 56 for (tok = s;;) { 57 c = *s++; 58 spanp = delim; 59 do { 60 if ((sc = *spanp++) == c) { 61 if (c == 0) 62 s = NULL; 63 else 64 s[-1] = 0; 65 *stringp = s; 66 return (tok); 67 } 68 } while (sc != 0); 69 } 70 /* NOTREACHED */ 71} 72