2 * Fowler / Noll / Vo Hash (FNV Hash)
3 * http://www.isthe.com/chongo/tech/comp/fnv/
5 * This is an implementation of the algorithms posted above.
6 * This file is placed in the public domain by Peter Wemm.
8 #ifndef _SYS_FNV_HASH_H_
9 #define _SYS_FNV_HASH_H_
11 typedef uint32_t Fnv32_t
;
12 typedef uint64_t Fnv64_t
;
14 #define FNV1_32_INIT ((Fnv32_t)33554467UL)
15 #define FNV1_64_INIT ((Fnv64_t)0xcbf29ce484222325ULL)
17 #define FNV_32_PRIME ((Fnv32_t)0x01000193UL)
18 #define FNV_64_PRIME ((Fnv64_t)0x100000001b3ULL)
20 static __inline Fnv32_t
21 fnv_32_buf(const void *buf
, size_t len
, Fnv32_t hval
)
23 const uint8_t *s
= (const uint8_t *)buf
;
32 static __inline Fnv32_t
33 fnv_32_str(const char *str
, Fnv32_t hval
)
35 const uint8_t *s
= (const uint8_t *)str
;
38 while ((c
= *s
++) != 0) {
45 static __inline Fnv64_t
46 fnv_64_buf(const void *buf
, size_t len
, Fnv64_t hval
)
48 const uint8_t *s
= (const uint8_t *)buf
;
57 static __inline Fnv64_t
58 fnv_64_str(const char *str
, Fnv64_t hval
)
60 const uint8_t *s
= (const uint8_t *)str
;
63 while ((c
= *s
++) != 0) {
69 #endif /* _SYS_FNV_HASH_H_ */