1
Fork 0
turbonss/src/djb2_hash.c

50 lines
1019 B
C
Raw Normal View History

2004-12-23 15:16:30 +02:00
#include "djb2_hash.h"
#include <stdlib.h>
djb2_state_t *djb2_state_new()
2004-12-23 15:16:30 +02:00
{
djb2_state_t *state = (djb2_state_t *)malloc(sizeof(djb2_state_t));
2005-01-18 23:06:08 +02:00
state->hashfunc = CMPH_HASH_DJB2;
2004-12-23 15:16:30 +02:00
return state;
}
void djb2_state_destroy(djb2_state_t *state)
2004-12-23 15:16:30 +02:00
{
free(state);
}
cmph_uint32 djb2_hash(djb2_state_t *state, const char *k, cmph_uint32 keylen)
2004-12-23 15:16:30 +02:00
{
2005-01-18 23:06:08 +02:00
register cmph_uint32 hash = 5381;
2004-12-23 15:16:30 +02:00
const unsigned char *ptr = k;
2005-01-18 23:06:08 +02:00
cmph_uint32 i = 0;
2004-12-23 15:16:30 +02:00
while (i < keylen)
{
hash = hash*33 ^ *ptr;
++ptr, ++i;
}
return hash;
}
void djb2_state_dump(djb2_state_t *state, char **buf, cmph_uint32 *buflen)
2004-12-23 15:16:30 +02:00
{
*buf = NULL;
*buflen = 0;
return;
}
djb2_state_t *djb2_state_copy(djb2_state_t *src_state)
{
djb2_state_t *dest_state = (djb2_state_t *)malloc(sizeof(djb2_state_t));
dest_state->hashfunc = src_state->hashfunc;
return dest_state;
}
djb2_state_t *djb2_state_load(const char *buf, cmph_uint32 buflen)
2004-12-23 15:16:30 +02:00
{
djb2_state_t *state = (djb2_state_t *)malloc(sizeof(djb2_state_t));
2005-01-18 23:06:08 +02:00
state->hashfunc = CMPH_HASH_DJB2;
2004-12-23 15:16:30 +02:00
return state;
}