6 typedef struct __chd_data_t chd_data_t;
7 typedef struct __chd_config_data_t chd_config_data_t;
10 chd_config_data_t *chd_config_new(cmph_config_t * mph);
11 void chd_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs);
13 /** \fn void chd_config_set_keys_per_bin(cmph_config_t *mph, cmph_uint32 keys_per_bin);
14 * \brief Allows to set the number of keys per bin.
15 * \param mph pointer to the configuration structure
16 * \param keys_per_bin value for the number of keys per bin
18 void chd_config_set_keys_per_bin(cmph_config_t *mph, cmph_uint32 keys_per_bin);
20 /** \fn void chd_config_set_b(cmph_config_t *mph, cmph_uint32 keys_per_bucket);
21 * \brief Allows to set the number of keys per bucket.
22 * \param mph pointer to the configuration structure
23 * \param keys_per_bucket value for the number of keys per bucket
25 void chd_config_set_b(cmph_config_t *mph, cmph_uint32 keys_per_bucket);
26 void chd_config_destroy(cmph_config_t *mph);
29 /* Chd algorithm API */
30 cmph_t *chd_new(cmph_config_t *mph, double c);
31 void chd_load(FILE *fd, cmph_t *mphf);
32 int chd_dump(cmph_t *mphf, FILE *fd);
33 void chd_destroy(cmph_t *mphf);
34 cmph_uint32 chd_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);
36 /** \fn void chd_pack(cmph_t *mphf, void *packed_mphf);
37 * \brief Support the ability to pack a perfect hash function into a preallocated contiguous memory space pointed by packed_mphf.
38 * \param mphf pointer to the resulting mphf
39 * \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()
41 void chd_pack(cmph_t *mphf, void *packed_mphf);
43 /** \fn cmph_uint32 chd_packed_size(cmph_t *mphf);
44 * \brief Return the amount of space needed to pack mphf.
45 * \param mphf pointer to a mphf
46 * \return the size of the packed function or zero for failures
48 cmph_uint32 chd_packed_size(cmph_t *mphf);
50 /** cmph_uint32 chd_search(void *packed_mphf, const char *key, cmph_uint32 keylen);
51 * \brief Use the packed mphf to do a search.
52 * \param packed_mphf pointer to the packed mphf
53 * \param key key to be hashed
54 * \param keylen key legth in bytes
55 * \return The mphf value
57 cmph_uint32 chd_search_packed(void *packed_mphf, const char *key, cmph_uint32 keylen);