1 /* 2 * Copyright (c) 1997, by Sun Microsystems, Inc. 3 * All rights reserved. 4 */ 5 6 #if defined(LIBC_SCCS) && !defined(lint) 7 static const char sccsid[] = "strsep.c 8.1 (Berkeley) 6/4/93"; 8 static const char rcsid[] = "$Id: strsep.c,v 8.5 1996/11/18 09:09:04 vixie Exp $"; 9 #endif /* LIBC_SCCS and not lint */ 10 11 /* 12 * Copyright (c) 1990, 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #pragma ident "%Z%%M% %I% %E% SMI" 45 46 #include "port_before.h" 47 #include <sys/cdefs.h> 48 #include <string.h> 49 #include <stdio.h> 50 #include "port_after.h" 51 52 #ifndef NEED_STRSEP 53 int __strsep_unneeded__; 54 #else 55 56 /* 57 * Get next token from string *stringp, where tokens are possibly-empty 58 * strings separated by characters from delim. 59 * 60 * Writes NULs into the string at *stringp to end tokens. 61 * delim need not remain constant from call to call. 62 * On return, *stringp points past the last NUL written (if there might 63 * be further tokens), or is NULL (if there are definitely no more tokens). 64 * 65 * If *stringp is NULL, strsep returns NULL. 66 */ 67 char * 68 strsep(char **stringp, const char *delim) { 69 char *s; 70 const char *spanp; 71 int c, sc; 72 char *tok; 73 74 if ((s = *stringp) == NULL) 75 return (NULL); 76 for (tok = s;;) { 77 c = *s++; 78 spanp = delim; 79 do { 80 if ((sc = *spanp++) == c) { 81 if (c == 0) 82 s = NULL; 83 else 84 s[-1] = 0; 85 *stringp = s; 86 return (tok); 87 } 88 } while (sc != 0); 89 } 90 /* NOTREACHED */ 91 } 92 93 #endif /*NEED_STRSEP*/ 94