1 #include "djb2_hash.h"
2 #include <stdlib.h>
3
djb2_state_new()4 djb2_state_t *djb2_state_new()
5 {
6 djb2_state_t *state = (djb2_state_t *)malloc(sizeof(djb2_state_t));
7 state->hashfunc = CMPH_HASH_DJB2;
8 return state;
9 }
10
djb2_state_destroy(djb2_state_t * state)11 void djb2_state_destroy(djb2_state_t *state)
12 {
13 free(state);
14 }
15
djb2_hash(djb2_state_t * state,const char * k,cmph_uint32 keylen)16 cmph_uint32 djb2_hash(djb2_state_t *state, const char *k, cmph_uint32 keylen)
17 {
18 register cmph_uint32 hash = 5381;
19 const unsigned char *ptr = (unsigned char *)k;
20 cmph_uint32 i = 0;
21 while (i < keylen)
22 {
23 hash = hash*33 ^ *ptr;
24 ++ptr, ++i;
25 }
26 return hash;
27 }
28
29
djb2_state_dump(djb2_state_t * state,char ** buf,cmph_uint32 * buflen)30 void djb2_state_dump(djb2_state_t *state, char **buf, cmph_uint32 *buflen)
31 {
32 *buf = NULL;
33 *buflen = 0;
34 return;
35 }
36
djb2_state_copy(djb2_state_t * src_state)37 djb2_state_t *djb2_state_copy(djb2_state_t *src_state)
38 {
39 djb2_state_t *dest_state = (djb2_state_t *)malloc(sizeof(djb2_state_t));
40 dest_state->hashfunc = src_state->hashfunc;
41 return dest_state;
42 }
43
djb2_state_load(const char * buf,cmph_uint32 buflen)44 djb2_state_t *djb2_state_load(const char *buf, cmph_uint32 buflen)
45 {
46 djb2_state_t *state = (djb2_state_t *)malloc(sizeof(djb2_state_t));
47 state->hashfunc = CMPH_HASH_DJB2;
48 return state;
49 }
50