2 * Copyright (c) 2014 Mark R V Murray
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef SYS_DEV_RANDOM_UINT128_H_INCLUDED
30 #define SYS_DEV_RANDOM_UINT128_H_INCLUDED
32 /* This whole thing is a crock :-(
34 * Everyone knows you always need the __uint128_t types!
37 #ifdef __SIZEOF_INT128__
38 typedef __uint128_t uint128_t;
40 typedef uint64_t uint128_t[2];
44 uint128_clear(uint128_t *big_uint)
46 #ifdef __SIZEOF_INT128__
49 (*big_uint)[0] = (*big_uint)[1] = 0UL;
54 uint128_increment(uint128_t *big_uint)
56 #ifdef __SIZEOF_INT128__
60 if ((*big_uint)[0] == 0UL)
66 uint128_is_zero(uint128_t big_uint)
68 #ifdef __SIZEOF_INT128__
69 return (big_uint == 0ULL);
71 return (big_uint[0] == 0UL && big_uint[1] == 0UL);
75 #endif /* SYS_DEV_RANDOM_UINT128_H_INCLUDED */