1 /* $NetBSD: hash.h,v 1.1.1.2 2011/04/14 14:08:32 elric Exp $ */
2
3 /*
4 * Copyright (c) 1999 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of KTH nor the names of its contributors may be
20 * used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
24 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
34
35 /* Id */
36
37 /* stuff in common between md4, md5, and sha1 */
38
39 #ifndef __hash_h__
40 #define __hash_h__
41
42 #ifdef KRB5
43 #include <krb5/krb5-types.h>
44 #endif
45 #include <krb5/roken.h>
46
47 #ifndef min
48 #define min(a,b) (((a)>(b))?(b):(a))
49 #endif
50
51 /* Vector Crays doesn't have a good 32-bit type, or more precisely,
52 int32_t as defined by <bind/bitypes.h> isn't 32 bits, and we don't
53 want to depend in being able to redefine this type. To cope with
54 this we have to clamp the result in some places to [0,2^32); no
55 need to do this on other machines. Did I say this was a mess?
56 */
57
58 #ifdef _CRAY
59 #define CRAYFIX(X) ((X) & 0xffffffff)
60 #else
61 #define CRAYFIX(X) (X)
62 #endif
63
64 static inline uint32_t
cshift(uint32_t x,unsigned int n)65 cshift (uint32_t x, unsigned int n)
66 {
67 x = CRAYFIX(x);
68 return CRAYFIX((x << n) | (x >> (32 - n)));
69 }
70
71 static inline uint64_t
cshift64(uint64_t x,unsigned int n)72 cshift64 (uint64_t x, unsigned int n)
73 {
74 return ((uint64_t)x << (uint64_t)n) | ((uint64_t)x >> ((uint64_t)64 - (uint64_t)n));
75 }
76
77 #endif /* __hash_h__ */
78