1 #if defined(LIBC_SCCS) && !defined(lint) 2 static const char sccsid[] = "strsep.c 8.1 (Berkeley) 6/4/93"; 3 static const char rcsid[] = "$Id: strsep.c,v 1.2 2005/04/27 04:56:12 sra Exp $"; 4 #endif /* LIBC_SCCS and not lint */ 5 6 /* 7 * Copyright (c) 1990, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include "port_before.h" 40 #include <sys/cdefs.h> 41 #include <string.h> 42 #include <stdio.h> 43 #include "port_after.h" 44 45 #ifndef NEED_STRSEP 46 int __strsep_unneeded__; 47 #else 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 char *s; 63 const char *spanp; 64 int c, sc; 65 char *tok; 66 67 if ((s = *stringp) == NULL) 68 return (NULL); 69 for (tok = s;;) { 70 c = *s++; 71 spanp = delim; 72 do { 73 if ((sc = *spanp++) == c) { 74 if (c == 0) 75 s = NULL; 76 else 77 s[-1] = 0; 78 *stringp = s; 79 return (tok); 80 } 81 } while (sc != 0); 82 } 83 /* NOTREACHED */ 84 } 85 86 #endif /*NEED_STRSEP*/ 87 88 /*! \file */ 89