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.
11 typedef u_int32_t Fnv32_t;
12 typedef u_int64_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 u_int8_t *s = (const u_int8_t *)buf;
32 static __inline Fnv32_t
33 fnv_32_str(const char *str, Fnv32_t hval)
35 const u_int8_t *s = (const u_int8_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 u_int8_t *s = (const u_int8_t *)buf;
57 static __inline Fnv64_t
58 fnv_64_str(const char *str, Fnv64_t hval)
60 const u_int8_t *s = (const u_int8_t *)str;
61 u_register_t c; /* 32 bit on i386, 64 bit on alpha,ia64 */
63 while ((c = *s++) != 0) {