1/*
2Copyright (C) 1999-2007 The Botan Project. All rights reserved.
3
4Redistribution and use in source and binary forms, for any use, with or without
5modification, is permitted provided that the following conditions are met:
6
71. Redistributions of source code must retain the above copyright notice, this
8list of conditions, and the following disclaimer.
9
102. Redistributions in binary form must reproduce the above copyright notice,
11this list of conditions, and the following disclaimer in the documentation
12and/or other materials provided with the distribution.
13
14THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) "AS IS" AND ANY EXPRESS OR IMPLIED
15WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
17
18IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE FOR ANY DIRECT,
19INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
22LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
23OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25*/
26// LICENSEHEADER_END
27namespace QCA { // WRAPNS_LINE
28/*************************************************
29 * Bit/Word Operations Header File *
30 * (C) 1999-2007 The Botan Project *
31 *************************************************/
32
33#ifndef BOTAN_BIT_OPS_H__
34#define BOTAN_BIT_OPS_H__
35
36} // WRAPNS_LINE
37#include <botan/types.h>
38namespace QCA { // WRAPNS_LINE
39
40namespace Botan {
41
42/*************************************************
43 * Rotation Functions *
44 *************************************************/
45template<typename T> inline T rotate_left(T input, u32bit rot)
46{
47 return (T)((input << rot) | (input >> (8 * sizeof(T) - rot)));
48}
49
50template<typename T> inline T rotate_right(T input, u32bit rot)
51{
52 return (T)((input >> rot) | (input << (8 * sizeof(T) - rot)));
53}
54
55/*************************************************
56 * Byte Extraction Function *
57 *************************************************/
58template<typename T> inline byte get_byte(u32bit byte_num, T input)
59{
60 return (byte)(input >> ((sizeof(T) - 1 - (byte_num & (sizeof(T) - 1))) << 3));
61}
62
63/*************************************************
64 * Byte to Word Conversions *
65 *************************************************/
66inline u16bit make_u16bit(byte input0, byte input1)
67{
68 return (u16bit)(((u16bit)input0 << 8) | input1);
69}
70
71inline u32bit make_u32bit(byte input0, byte input1, byte input2, byte input3)
72{
73 return (u32bit)(((u32bit)input0 << 24) | ((u32bit)input1 << 16) | ((u32bit)input2 << 8) | input3);
74}
75
76inline u64bit
77make_u64bit(byte input0, byte input1, byte input2, byte input3, byte input4, byte input5, byte input6, byte input7)
78{
79 return (u64bit)(((u64bit)input0 << 56) | ((u64bit)input1 << 48) | ((u64bit)input2 << 40) | ((u64bit)input3 << 32) |
80 ((u64bit)input4 << 24) | ((u64bit)input5 << 16) | ((u64bit)input6 << 8) | input7);
81}
82
83/*************************************************
84 * XOR Functions *
85 *************************************************/
86void xor_buf(byte[], const byte[], u32bit);
87void xor_buf(byte[], const byte[], const byte[], u32bit);
88
89/*************************************************
90 * Misc Utility Functions *
91 *************************************************/
92bool power_of_2(u64bit);
93u32bit high_bit(u64bit);
94u32bit low_bit(u64bit);
95u32bit significant_bytes(u64bit);
96u32bit hamming_weight(u64bit);
97
98}
99
100#endif
101} // WRAPNS_LINE
102

source code of qca/src/botantools/botan/botan/bit_ops.h