xref: /xnu-11215.81.4/bsd/libkern/memchr.c (revision d4514f0bc1d3f944c22d92e68b646ac3fb40d452)
1*d4514f0bSApple OSS Distributions /*
2*d4514f0bSApple OSS Distributions  * Copyright (c) 2012 Apple Computer, Inc. All rights reserved.
3*d4514f0bSApple OSS Distributions  *
4*d4514f0bSApple OSS Distributions  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*d4514f0bSApple OSS Distributions  *
6*d4514f0bSApple OSS Distributions  * This file contains Original Code and/or Modifications of Original Code
7*d4514f0bSApple OSS Distributions  * as defined in and that are subject to the Apple Public Source License
8*d4514f0bSApple OSS Distributions  * Version 2.0 (the 'License'). You may not use this file except in
9*d4514f0bSApple OSS Distributions  * compliance with the License. The rights granted to you under the License
10*d4514f0bSApple OSS Distributions  * may not be used to create, or enable the creation or redistribution of,
11*d4514f0bSApple OSS Distributions  * unlawful or unlicensed copies of an Apple operating system, or to
12*d4514f0bSApple OSS Distributions  * circumvent, violate, or enable the circumvention or violation of, any
13*d4514f0bSApple OSS Distributions  * terms of an Apple operating system software license agreement.
14*d4514f0bSApple OSS Distributions  *
15*d4514f0bSApple OSS Distributions  * Please obtain a copy of the License at
16*d4514f0bSApple OSS Distributions  * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*d4514f0bSApple OSS Distributions  *
18*d4514f0bSApple OSS Distributions  * The Original Code and all software distributed under the License are
19*d4514f0bSApple OSS Distributions  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*d4514f0bSApple OSS Distributions  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*d4514f0bSApple OSS Distributions  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*d4514f0bSApple OSS Distributions  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*d4514f0bSApple OSS Distributions  * Please see the License for the specific language governing rights and
24*d4514f0bSApple OSS Distributions  * limitations under the License.
25*d4514f0bSApple OSS Distributions  *
26*d4514f0bSApple OSS Distributions  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*d4514f0bSApple OSS Distributions  */
28*d4514f0bSApple OSS Distributions 
29*d4514f0bSApple OSS Distributions #include <sys/param.h>
30*d4514f0bSApple OSS Distributions #include <libkern/libkern.h>
31*d4514f0bSApple OSS Distributions 
32*d4514f0bSApple OSS Distributions void *
memchr(const void * bigptr,int ch,size_t length)33*d4514f0bSApple OSS Distributions memchr(const void *bigptr, int ch, size_t length)
34*d4514f0bSApple OSS Distributions {
35*d4514f0bSApple OSS Distributions 	const char *big = (const char *)bigptr;
36*d4514f0bSApple OSS Distributions 	size_t n;
37*d4514f0bSApple OSS Distributions 	for (n = 0; n < length; n++) {
38*d4514f0bSApple OSS Distributions 		if (big[n] == ch) {
39*d4514f0bSApple OSS Distributions 			return __DECONST(void *, &big[n]);
40*d4514f0bSApple OSS Distributions 		}
41*d4514f0bSApple OSS Distributions 	}
42*d4514f0bSApple OSS Distributions 	return NULL;
43*d4514f0bSApple OSS Distributions }
44