projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 9385eb3d | 1 | /*- |
| e9ce8d39 A |
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. | |
| e9ce8d39 A |
13 | * 4. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software | |
| 15 | * without specific prior written permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 27 | * SUCH DAMAGE. | |
| 28 | */ | |
| 29 | ||
| e9ce8d39 A |
30 | #if defined(LIBC_SCCS) && !defined(lint) |
| 31 | static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93"; | |
| 32 | #endif /* LIBC_SCCS and not lint */ | |
| 9385eb3d | 33 | #include <sys/cdefs.h> |
| 1f2f436a | 34 | __FBSDID("$FreeBSD: src/lib/libc/string/strsep.c,v 1.7 2009/02/03 17:58:20 danger Exp $"); |
| 9385eb3d A |
35 | |
| 36 | #include <string.h> | |
| 37 | #include <stdio.h> | |
| e9ce8d39 A |
38 | |
| 39 | /* | |
| 40 | * Get next token from string *stringp, where tokens are possibly-empty | |
| 9385eb3d | 41 | * strings separated by characters from delim. |
| e9ce8d39 A |
42 | * |
| 43 | * Writes NULs into the string at *stringp to end tokens. | |
| 44 | * delim need not remain constant from call to call. | |
| 45 | * On return, *stringp points past the last NUL written (if there might | |
| 46 | * be further tokens), or is NULL (if there are definitely no more tokens). | |
| 47 | * | |
| 48 | * If *stringp is NULL, strsep returns NULL. | |
| 49 | */ | |
| 50 | char * | |
| 1f2f436a | 51 | strsep(char **stringp, const char *delim) |
| e9ce8d39 | 52 | { |
| 9385eb3d A |
53 | char *s; |
| 54 | const char *spanp; | |
| 55 | int c, sc; | |
| e9ce8d39 A |
56 | char *tok; |
| 57 | ||
| 58 | if ((s = *stringp) == NULL) | |
| 59 | return (NULL); | |
| 60 | for (tok = s;;) { | |
| 61 | c = *s++; | |
| 62 | spanp = delim; | |
| 63 | do { | |
| 64 | if ((sc = *spanp++) == c) { | |
| 65 | if (c == 0) | |
| 66 | s = NULL; | |
| 67 | else | |
| 68 | s[-1] = 0; | |
| 69 | *stringp = s; | |
| 70 | return (tok); | |
| 71 | } | |
| 72 | } while (sc != 0); | |
| 73 | } | |
| 74 | /* NOTREACHED */ | |
| 75 | } |