| Damien Miller | 3077fb9 | 2000-07-11 21:34:34 +1000 | [diff] [blame] | 1 | /* $OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1990, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. All advertising materials mentioning features or use of this software |
| 16 | * must display the following acknowledgement: |
| 17 | * This product includes software developed by the University of |
| 18 | * California, Berkeley and its contributors. |
| 19 | * 4. Neither the name of the University nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | #include "config.h" |
| 37 | |
| 38 | #if !defined(HAVE_STRSEP) |
| 39 | |
| 40 | #include <string.h> |
| 41 | #include <stdio.h> |
| 42 | |
| 43 | #if defined(LIBC_SCCS) && !defined(lint) |
| 44 | #if 0 |
| 45 | static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93"; |
| 46 | #else |
| 47 | static char *rcsid = "$OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $"; |
| 48 | #endif |
| 49 | #endif /* LIBC_SCCS and not lint */ |
| 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 | { |
| 65 | register char *s; |
| 66 | register const char *spanp; |
| 67 | register int c, sc; |
| 68 | char *tok; |
| 69 | |
| 70 | if ((s = *stringp) == NULL) |
| 71 | return (NULL); |
| 72 | for (tok = s;;) { |
| 73 | c = *s++; |
| 74 | spanp = delim; |
| 75 | do { |
| 76 | if ((sc = *spanp++) == c) { |
| 77 | if (c == 0) |
| 78 | s = NULL; |
| 79 | else |
| 80 | s[-1] = 0; |
| 81 | *stringp = s; |
| 82 | return (tok); |
| 83 | } |
| 84 | } while (sc != 0); |
| 85 | } |
| 86 | /* NOTREACHED */ |
| 87 | } |
| 88 | |
| 89 | #endif /* !defined(HAVE_STRSEP) */ |