xref: /xnu-10002.81.5/bsd/libkern/scanc.c (revision 5e3eaea39dcf651e66cb99ba7d70e32cc4a99587)
1*5e3eaea3SApple OSS Distributions /*
2*5e3eaea3SApple OSS Distributions  * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*5e3eaea3SApple OSS Distributions  *
4*5e3eaea3SApple OSS Distributions  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*5e3eaea3SApple OSS Distributions  *
6*5e3eaea3SApple OSS Distributions  * This file contains Original Code and/or Modifications of Original Code
7*5e3eaea3SApple OSS Distributions  * as defined in and that are subject to the Apple Public Source License
8*5e3eaea3SApple OSS Distributions  * Version 2.0 (the 'License'). You may not use this file except in
9*5e3eaea3SApple OSS Distributions  * compliance with the License. The rights granted to you under the License
10*5e3eaea3SApple OSS Distributions  * may not be used to create, or enable the creation or redistribution of,
11*5e3eaea3SApple OSS Distributions  * unlawful or unlicensed copies of an Apple operating system, or to
12*5e3eaea3SApple OSS Distributions  * circumvent, violate, or enable the circumvention or violation of, any
13*5e3eaea3SApple OSS Distributions  * terms of an Apple operating system software license agreement.
14*5e3eaea3SApple OSS Distributions  *
15*5e3eaea3SApple OSS Distributions  * Please obtain a copy of the License at
16*5e3eaea3SApple OSS Distributions  * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*5e3eaea3SApple OSS Distributions  *
18*5e3eaea3SApple OSS Distributions  * The Original Code and all software distributed under the License are
19*5e3eaea3SApple OSS Distributions  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*5e3eaea3SApple OSS Distributions  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*5e3eaea3SApple OSS Distributions  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*5e3eaea3SApple OSS Distributions  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*5e3eaea3SApple OSS Distributions  * Please see the License for the specific language governing rights and
24*5e3eaea3SApple OSS Distributions  * limitations under the License.
25*5e3eaea3SApple OSS Distributions  *
26*5e3eaea3SApple OSS Distributions  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*5e3eaea3SApple OSS Distributions  */
28*5e3eaea3SApple OSS Distributions /*-
29*5e3eaea3SApple OSS Distributions  * Copyright (c) 1992, 1993
30*5e3eaea3SApple OSS Distributions  *	The Regents of the University of California.  All rights reserved.
31*5e3eaea3SApple OSS Distributions  *
32*5e3eaea3SApple OSS Distributions  * Redistribution and use in source and binary forms, with or without
33*5e3eaea3SApple OSS Distributions  * modification, are permitted provided that the following conditions
34*5e3eaea3SApple OSS Distributions  * are met:
35*5e3eaea3SApple OSS Distributions  * 1. Redistributions of source code must retain the above copyright
36*5e3eaea3SApple OSS Distributions  *    notice, this list of conditions and the following disclaimer.
37*5e3eaea3SApple OSS Distributions  * 2. Redistributions in binary form must reproduce the above copyright
38*5e3eaea3SApple OSS Distributions  *    notice, this list of conditions and the following disclaimer in the
39*5e3eaea3SApple OSS Distributions  *    documentation and/or other materials provided with the distribution.
40*5e3eaea3SApple OSS Distributions  * 3. All advertising materials mentioning features or use of this software
41*5e3eaea3SApple OSS Distributions  *    must display the following acknowledgement:
42*5e3eaea3SApple OSS Distributions  *	This product includes software developed by the University of
43*5e3eaea3SApple OSS Distributions  *	California, Berkeley and its contributors.
44*5e3eaea3SApple OSS Distributions  * 4. Neither the name of the University nor the names of its contributors
45*5e3eaea3SApple OSS Distributions  *    may be used to endorse or promote products derived from this software
46*5e3eaea3SApple OSS Distributions  *    without specific prior written permission.
47*5e3eaea3SApple OSS Distributions  *
48*5e3eaea3SApple OSS Distributions  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49*5e3eaea3SApple OSS Distributions  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50*5e3eaea3SApple OSS Distributions  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51*5e3eaea3SApple OSS Distributions  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52*5e3eaea3SApple OSS Distributions  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53*5e3eaea3SApple OSS Distributions  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54*5e3eaea3SApple OSS Distributions  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55*5e3eaea3SApple OSS Distributions  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56*5e3eaea3SApple OSS Distributions  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57*5e3eaea3SApple OSS Distributions  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58*5e3eaea3SApple OSS Distributions  * SUCH DAMAGE.
59*5e3eaea3SApple OSS Distributions  *
60*5e3eaea3SApple OSS Distributions  *	@(#)scanc.c	8.1 (Berkeley) 6/10/93
61*5e3eaea3SApple OSS Distributions  */
62*5e3eaea3SApple OSS Distributions 
63*5e3eaea3SApple OSS Distributions #include <libkern/libkern.h>
64*5e3eaea3SApple OSS Distributions 
65*5e3eaea3SApple OSS Distributions size_t
scanc(size_t size,u_char * cp,const u_char table[],u_char mask0)66*5e3eaea3SApple OSS Distributions scanc(size_t size, u_char *cp, const u_char table[], u_char mask0)
67*5e3eaea3SApple OSS Distributions {
68*5e3eaea3SApple OSS Distributions 	u_char *end;
69*5e3eaea3SApple OSS Distributions 	u_char mask;
70*5e3eaea3SApple OSS Distributions 
71*5e3eaea3SApple OSS Distributions 	mask = mask0;
72*5e3eaea3SApple OSS Distributions 	for (end = &cp[size]; cp != end && (table[*cp] & mask) == 0; ++cp) {
73*5e3eaea3SApple OSS Distributions 		;
74*5e3eaea3SApple OSS Distributions 	}
75*5e3eaea3SApple OSS Distributions 	return (size_t)(end - cp);
76*5e3eaea3SApple OSS Distributions }
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