54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#include "fnv_hash.h"
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#include <stdlib.h>
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fnv_state_t *fnv_state_new()
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{
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fnv_state_t *state = (fnv_state_t *)malloc(sizeof(fnv_state_t));
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state->hashfunc = CMPH_HASH_FNV;
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return state;
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}
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void fnv_state_destroy(fnv_state_t *state)
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{
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free(state);
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}
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cmph_uint32 fnv_hash(fnv_state_t *state, const char *k, cmph_uint32 keylen)
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{
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const unsigned char *bp = (const unsigned char *)k;
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const unsigned char *be = bp + keylen;
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static unsigned int hval = 0;
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while (bp < be)
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{
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//hval *= 0x01000193; good for non-gcc compiler
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hval += (hval << 1) + (hval << 4) + (hval << 7) + (hval << 8) + (hval << 24); //good for gcc
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hval ^= *bp++;
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}
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return hval;
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}
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void fnv_state_dump(fnv_state_t *state, char **buf, cmph_uint32 *buflen)
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{
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*buf = NULL;
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*buflen = 0;
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return;
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}
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fnv_state_t * fnv_state_copy(fnv_state_t *src_state)
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{
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fnv_state_t *dest_state = (fnv_state_t *)malloc(sizeof(fnv_state_t));
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dest_state->hashfunc = src_state->hashfunc;
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return dest_state;
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}
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fnv_state_t *fnv_state_load(const char *buf, cmph_uint32 buflen)
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{
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fnv_state_t *state = (fnv_state_t *)malloc(sizeof(fnv_state_t));
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state->hashfunc = CMPH_HASH_FNV;
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return state;
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}
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