1*f6217f89SApple OSS Distributions /*
2*f6217f89SApple OSS Distributions * Copyright (c) 2016 Apple Inc. All rights reserved.
3*f6217f89SApple OSS Distributions *
4*f6217f89SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*f6217f89SApple OSS Distributions *
6*f6217f89SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*f6217f89SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*f6217f89SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*f6217f89SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*f6217f89SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*f6217f89SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*f6217f89SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*f6217f89SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*f6217f89SApple OSS Distributions *
15*f6217f89SApple OSS Distributions * Please obtain a copy of the License at
16*f6217f89SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*f6217f89SApple OSS Distributions *
18*f6217f89SApple OSS Distributions * The Original Code and all software distributed under the License are
19*f6217f89SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*f6217f89SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*f6217f89SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*f6217f89SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*f6217f89SApple OSS Distributions * Please see the License for the specific language governing rights and
24*f6217f89SApple OSS Distributions * limitations under the License.
25*f6217f89SApple OSS Distributions *
26*f6217f89SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*f6217f89SApple OSS Distributions */
28*f6217f89SApple OSS Distributions
29*f6217f89SApple OSS Distributions /*-
30*f6217f89SApple OSS Distributions * Copyright (c) 1990, 1993
31*f6217f89SApple OSS Distributions * The Regents of the University of California. All rights reserved.
32*f6217f89SApple OSS Distributions *
33*f6217f89SApple OSS Distributions * Redistribution and use in source and binary forms, with or without
34*f6217f89SApple OSS Distributions * modification, are permitted provided that the following conditions
35*f6217f89SApple OSS Distributions * are met:
36*f6217f89SApple OSS Distributions * 1. Redistributions of source code must retain the above copyright
37*f6217f89SApple OSS Distributions * notice, this list of conditions and the following disclaimer.
38*f6217f89SApple OSS Distributions * 2. Redistributions in binary form must reproduce the above copyright
39*f6217f89SApple OSS Distributions * notice, this list of conditions and the following disclaimer in the
40*f6217f89SApple OSS Distributions * documentation and/or other materials provided with the distribution.
41*f6217f89SApple OSS Distributions * 4. Neither the name of the University nor the names of its contributors
42*f6217f89SApple OSS Distributions * may be used to endorse or promote products derived from this software
43*f6217f89SApple OSS Distributions * without specific prior written permission.
44*f6217f89SApple OSS Distributions *
45*f6217f89SApple OSS Distributions * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46*f6217f89SApple OSS Distributions * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47*f6217f89SApple OSS Distributions * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48*f6217f89SApple OSS Distributions * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49*f6217f89SApple OSS Distributions * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50*f6217f89SApple OSS Distributions * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51*f6217f89SApple OSS Distributions * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52*f6217f89SApple OSS Distributions * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53*f6217f89SApple OSS Distributions * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54*f6217f89SApple OSS Distributions * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55*f6217f89SApple OSS Distributions * SUCH DAMAGE.
56*f6217f89SApple OSS Distributions */
57*f6217f89SApple OSS Distributions
58*f6217f89SApple OSS Distributions #if defined(LIBC_SCCS) && !defined(lint)
59*f6217f89SApple OSS Distributions static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93";
60*f6217f89SApple OSS Distributions #endif /* LIBC_SCCS and not lint */
61*f6217f89SApple OSS Distributions #include <sys/cdefs.h>
62*f6217f89SApple OSS Distributions /* __FBSDID("$FreeBSD: src/sys/libkern/strsep.c,v 1.7 2004/04/07 20:46:10 imp Exp $"); */
63*f6217f89SApple OSS Distributions
64*f6217f89SApple OSS Distributions #include <sys/param.h>
65*f6217f89SApple OSS Distributions #include <libkern/libkern.h>
66*f6217f89SApple OSS Distributions
67*f6217f89SApple OSS Distributions /*
68*f6217f89SApple OSS Distributions * Get next token from string *stringp, where tokens are possibly-empty
69*f6217f89SApple OSS Distributions * strings separated by characters from delim.
70*f6217f89SApple OSS Distributions *
71*f6217f89SApple OSS Distributions * Writes NULs into the string at *stringp to end tokens.
72*f6217f89SApple OSS Distributions * delim need not remain constant from call to call.
73*f6217f89SApple OSS Distributions * On return, *stringp points past the last NUL written (if there might
74*f6217f89SApple OSS Distributions * be further tokens), or is NULL (if there are definitely no more tokens).
75*f6217f89SApple OSS Distributions *
76*f6217f89SApple OSS Distributions * If *stringp is NULL, strsep returns NULL.
77*f6217f89SApple OSS Distributions */
78*f6217f89SApple OSS Distributions char *
strsep(char ** stringp,const char * delim)79*f6217f89SApple OSS Distributions strsep(char **stringp, const char *delim)
80*f6217f89SApple OSS Distributions {
81*f6217f89SApple OSS Distributions char *s;
82*f6217f89SApple OSS Distributions const char *spanp;
83*f6217f89SApple OSS Distributions int c, sc;
84*f6217f89SApple OSS Distributions char *tok;
85*f6217f89SApple OSS Distributions
86*f6217f89SApple OSS Distributions if ((s = *stringp) == NULL) {
87*f6217f89SApple OSS Distributions return NULL;
88*f6217f89SApple OSS Distributions }
89*f6217f89SApple OSS Distributions for (tok = s;;) {
90*f6217f89SApple OSS Distributions c = *s++;
91*f6217f89SApple OSS Distributions spanp = delim;
92*f6217f89SApple OSS Distributions do {
93*f6217f89SApple OSS Distributions if ((sc = *spanp++) == c) {
94*f6217f89SApple OSS Distributions if (c == 0) {
95*f6217f89SApple OSS Distributions s = NULL;
96*f6217f89SApple OSS Distributions } else {
97*f6217f89SApple OSS Distributions s[-1] = 0;
98*f6217f89SApple OSS Distributions }
99*f6217f89SApple OSS Distributions *stringp = s;
100*f6217f89SApple OSS Distributions return tok;
101*f6217f89SApple OSS Distributions }
102*f6217f89SApple OSS Distributions } while (sc != 0);
103*f6217f89SApple OSS Distributions }
104*f6217f89SApple OSS Distributions /* NOTREACHED */
105*f6217f89SApple OSS Distributions }
106