1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
#ifndef _CMPH_CHD_PH_H__
#define _CMPH_CHD_PH_H__
#include "cmph.h"
typedef struct __chd_ph_data_t chd_ph_data_t;
typedef struct __chd_ph_config_data_t chd_ph_config_data_t;
/* Config API */
chd_ph_config_data_t *chd_ph_config_new(void);
void chd_ph_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs);
/** \fn void chd_ph_config_set_keys_per_bin(cmph_config_t *mph, cmph_uint32 keys_per_bin);
* \brief Allows to set the number of keys per bin.
* \param mph pointer to the configuration structure
* \param keys_per_bin value for the number of keys per bin
*/
void chd_ph_config_set_keys_per_bin(cmph_config_t *mph, cmph_uint32 keys_per_bin);
/** \fn void chd_ph_config_set_b(cmph_config_t *mph, cmph_uint32 keys_per_bucket);
* \brief Allows to set the number of keys per bucket.
* \param mph pointer to the configuration structure
* \param keys_per_bucket value for the number of keys per bucket
*/
void chd_ph_config_set_b(cmph_config_t *mph, cmph_uint32 keys_per_bucket);
void chd_ph_config_destroy(cmph_config_t *mph);
/* Chd algorithm API */
cmph_t *chd_ph_new(cmph_config_t *mph, double c);
void chd_ph_load(FILE *fd, cmph_t *mphf);
int chd_ph_dump(cmph_t *mphf, FILE *fd);
void chd_ph_destroy(cmph_t *mphf);
cmph_uint32 chd_ph_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);
/** \fn void chd_ph_pack(cmph_t *mphf, void *packed_mphf);
* \brief Support the ability to pack a perfect hash function into a preallocated contiguous memory space pointed by packed_mphf.
* \param mphf pointer to the resulting mphf
* \param packed_mphf pointer to the contiguous memory area used to store the resulting mphf. The size of packed_mphf must be at least cmph_packed_size()
*/
void chd_ph_pack(cmph_t *mphf, void *packed_mphf);
/** \fn cmph_uint32 chd_ph_packed_size(cmph_t *mphf);
* \brief Return the amount of space needed to pack mphf.
* \param mphf pointer to a mphf
* \return the size of the packed function or zero for failures
*/
cmph_uint32 chd_ph_packed_size(cmph_t *mphf);
/** cmph_uint32 chd_ph_search(void *packed_mphf, const char *key, cmph_uint32 keylen);
* \brief Use the packed mphf to do a search.
* \param packed_mphf pointer to the packed mphf
* \param key key to be hashed
* \param keylen key legth in bytes
* \return The mphf value
*/
cmph_uint32 chd_ph_search_packed(void *packed_mphf, const char *key, cmph_uint32 keylen);
#endif
|
