1 | /* |
2 | * Copyright (c) 2016 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | |
29 | /*- |
30 | * Copyright (c) 1990, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * Redistribution and use in source and binary forms, with or without |
34 | * modification, are permitted provided that the following conditions |
35 | * are met: |
36 | * 1. Redistributions of source code must retain the above copyright |
37 | * notice, this list of conditions and the following disclaimer. |
38 | * 2. Redistributions in binary form must reproduce the above copyright |
39 | * notice, this list of conditions and the following disclaimer in the |
40 | * documentation and/or other materials provided with the distribution. |
41 | * 4. Neither the name of the University nor the names of its contributors |
42 | * may be used to endorse or promote products derived from this software |
43 | * without specific prior written permission. |
44 | * |
45 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
46 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
47 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
48 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
49 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
50 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
51 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
52 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
53 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
54 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
55 | * SUCH DAMAGE. |
56 | */ |
57 | |
58 | #if defined(LIBC_SCCS) && !defined(lint) |
59 | static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93" ; |
60 | #endif /* LIBC_SCCS and not lint */ |
61 | #include <sys/cdefs.h> |
62 | /* __FBSDID("$FreeBSD: src/sys/libkern/strsep.c,v 1.7 2004/04/07 20:46:10 imp Exp $"); */ |
63 | |
64 | #include <sys/param.h> |
65 | #include <libkern/libkern.h> |
66 | |
67 | /* |
68 | * Get next token from string *stringp, where tokens are possibly-empty |
69 | * strings separated by characters from delim. |
70 | * |
71 | * Writes NULs into the string at *stringp to end tokens. |
72 | * delim need not remain constant from call to call. |
73 | * On return, *stringp points past the last NUL written (if there might |
74 | * be further tokens), or is NULL (if there are definitely no more tokens). |
75 | * |
76 | * If *stringp is NULL, strsep returns NULL. |
77 | */ |
78 | char * |
79 | strsep(char **stringp, const char *delim) |
80 | { |
81 | char *s; |
82 | const char *spanp; |
83 | int c, sc; |
84 | char *tok; |
85 | |
86 | if ((s = *stringp) == NULL) { |
87 | return NULL; |
88 | } |
89 | for (tok = s;;) { |
90 | c = *s++; |
91 | spanp = delim; |
92 | do { |
93 | if ((sc = *spanp++) == c) { |
94 | if (c == 0) { |
95 | s = NULL; |
96 | } else { |
97 | s[-1] = 0; |
98 | } |
99 | *stringp = s; |
100 | return tok; |
101 | } |
102 | } while (sc != 0); |
103 | } |
104 | /* NOTREACHED */ |
105 | } |
106 | |