1*2faa6cdcSFrançois Tigeot /*
2*2faa6cdcSFrançois Tigeot * Copyright (c) 2013 François Tigeot
3*2faa6cdcSFrançois Tigeot * All rights reserved.
4*2faa6cdcSFrançois Tigeot *
5*2faa6cdcSFrançois Tigeot * Redistribution and use in source and binary forms, with or without
6*2faa6cdcSFrançois Tigeot * modification, are permitted provided that the following conditions
7*2faa6cdcSFrançois Tigeot * are met:
8*2faa6cdcSFrançois Tigeot * 1. Redistributions of source code must retain the above copyright
9*2faa6cdcSFrançois Tigeot * notice unmodified, this list of conditions, and the following
10*2faa6cdcSFrançois Tigeot * disclaimer.
11*2faa6cdcSFrançois Tigeot * 2. Redistributions in binary form must reproduce the above copyright
12*2faa6cdcSFrançois Tigeot * notice, this list of conditions and the following disclaimer in the
13*2faa6cdcSFrançois Tigeot * documentation and/or other materials provided with the distribution.
14*2faa6cdcSFrançois Tigeot *
15*2faa6cdcSFrançois Tigeot * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16*2faa6cdcSFrançois Tigeot * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17*2faa6cdcSFrançois Tigeot * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18*2faa6cdcSFrançois Tigeot * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19*2faa6cdcSFrançois Tigeot * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20*2faa6cdcSFrançois Tigeot * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21*2faa6cdcSFrançois Tigeot * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22*2faa6cdcSFrançois Tigeot * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23*2faa6cdcSFrançois Tigeot * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24*2faa6cdcSFrançois Tigeot * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25*2faa6cdcSFrançois Tigeot */
26*2faa6cdcSFrançois Tigeot
27*2faa6cdcSFrançois Tigeot #ifndef _LINUX_HASH_H_
28*2faa6cdcSFrançois Tigeot #define _LINUX_HASH_H_
29*2faa6cdcSFrançois Tigeot
30*2faa6cdcSFrançois Tigeot #include <sys/hash.h>
31*2faa6cdcSFrançois Tigeot
hash_64(u64 val,unsigned int bits)32*2faa6cdcSFrançois Tigeot static inline u64 hash_64(u64 val, unsigned int bits)
33*2faa6cdcSFrançois Tigeot {
34*2faa6cdcSFrançois Tigeot u64 ret;
35*2faa6cdcSFrançois Tigeot
36*2faa6cdcSFrançois Tigeot ret = (uint64_t)hash32_buf(&val, sizeof(val), bits);
37*2faa6cdcSFrançois Tigeot
38*2faa6cdcSFrançois Tigeot return ret >> (64 - bits);
39*2faa6cdcSFrançois Tigeot }
40*2faa6cdcSFrançois Tigeot
hash_32(u32 val,unsigned int bits)41*2faa6cdcSFrançois Tigeot static inline u32 hash_32(u32 val, unsigned int bits)
42*2faa6cdcSFrançois Tigeot {
43*2faa6cdcSFrançois Tigeot u32 ret;
44*2faa6cdcSFrançois Tigeot
45*2faa6cdcSFrançois Tigeot ret = hash32_buf(&val, sizeof(val), bits);
46*2faa6cdcSFrançois Tigeot
47*2faa6cdcSFrançois Tigeot return ret >> (32 - bits);
48*2faa6cdcSFrançois Tigeot }
49*2faa6cdcSFrançois Tigeot
50*2faa6cdcSFrançois Tigeot #if BITS_PER_LONG == 64 /* amd64 */
51*2faa6cdcSFrançois Tigeot #define hash_long(val, bits) hash_64(val, bits)
52*2faa6cdcSFrançois Tigeot #else /* i386 */
53*2faa6cdcSFrançois Tigeot #define hash_long(val, bits) hash_32(val, bits)
54*2faa6cdcSFrançois Tigeot #endif
55*2faa6cdcSFrançois Tigeot
56*2faa6cdcSFrançois Tigeot #endif /* _LINUX_HASH_H_ */
57