Line data Source code
1 : /*
2 : * Copyright (c) 1999 Kungliga Tekniska Högskolan
3 : * (Royal Institute of Technology, Stockholm, Sweden).
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions
8 : * are met:
9 : *
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : *
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : *
17 : * 3. Neither the name of KTH nor the names of its contributors may be
18 : * used to endorse or promote products derived from this software without
19 : * specific prior written permission.
20 : *
21 : * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
22 : * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
25 : * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 : * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 : * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 : * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 : * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 : * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 : * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
32 :
33 : /* $Id$ */
34 :
35 : /* stuff in common between md4, md5, and sha1 */
36 :
37 : #ifndef __hash_h__
38 : #define __hash_h__
39 :
40 : #ifdef KRB5
41 : #include <krb5-types.h>
42 : #endif
43 :
44 : #ifndef min
45 : #define min(a,b) (((a)>(b))?(b):(a))
46 : #endif
47 :
48 : /* Vector Crays doesn't have a good 32-bit type, or more precisely,
49 : int32_t as defined by <bind/bitypes.h> isn't 32 bits, and we don't
50 : want to depend in being able to redefine this type. To cope with
51 : this we have to clamp the result in some places to [0,2^32); no
52 : need to do this on other machines. Did I say this was a mess?
53 : */
54 :
55 : #ifdef _CRAY
56 : #define CRAYFIX(X) ((X) & 0xffffffff)
57 : #else
58 : #define CRAYFIX(X) (X)
59 : #endif
60 :
61 : static inline uint32_t
62 >67040*10^7 : cshift (uint32_t x, unsigned int n)
63 : {
64 >67040*10^7 : x = CRAYFIX(x);
65 >67040*10^7 : return CRAYFIX((x << n) | (x >> (32 - n)));
66 : }
67 :
68 : static inline uint64_t
69 0 : cshift64 (uint64_t x, unsigned int n)
70 : {
71 0 : return ((uint64_t)x << (uint64_t)n) | ((uint64_t)x >> ((uint64_t)64 - (uint64_t)n));
72 : }
73 :
74 : #endif /* __hash_h__ */
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