girepository/cmph/cmph.h

#ifndef __CMPH_H__
#define __CMPH_H__

#include <stdlib.h>
#include <stdio.h>

#ifdef __cplusplus
extern "C"
{
#endif

#include "cmph_types.h"

typedef struct __config_t cmph_config_t;
typedef struct __cmph_t cmph_t;

typedef struct 
{
        void *data;
        cmph_uint32 nkeys;
        int (*read)(void *, char **, cmph_uint32 *);
        void (*dispose)(void *, char *, cmph_uint32);
        void (*rewind)(void *);
} cmph_io_adapter_t;

/** Adapter pattern API **/
/* please call free() in the created adapters */
cmph_io_adapter_t *cmph_io_nlfile_adapter(FILE * keys_fd);
void cmph_io_nlfile_adapter_destroy(cmph_io_adapter_t * key_source);

cmph_io_adapter_t *cmph_io_nlnkfile_adapter(FILE * keys_fd, cmph_uint32 nkeys);
void cmph_io_nlnkfile_adapter_destroy(cmph_io_adapter_t * key_source);

cmph_io_adapter_t *cmph_io_vector_adapter(char ** vector, cmph_uint32 nkeys);
void cmph_io_vector_adapter_destroy(cmph_io_adapter_t * key_source);

cmph_io_adapter_t *cmph_io_byte_vector_adapter(cmph_uint8 ** vector, cmph_uint32 nkeys);
void cmph_io_byte_vector_adapter_destroy(cmph_io_adapter_t * key_source);

cmph_io_adapter_t *cmph_io_struct_vector_adapter(void * vector, 
                                                 cmph_uint32 struct_size, 
                                                 cmph_uint32 key_offset, 
                                                 cmph_uint32 key_len, 
                                                 cmph_uint32 nkeys);

void cmph_io_struct_vector_adapter_destroy(cmph_io_adapter_t * key_source);

/** Hash configuration API **/
cmph_config_t *cmph_config_new(cmph_io_adapter_t *key_source);
void cmph_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs);
void cmph_config_set_verbosity(cmph_config_t *mph, cmph_uint32 verbosity);
void cmph_config_set_graphsize(cmph_config_t *mph, double c);
void cmph_config_set_algo(cmph_config_t *mph, CMPH_ALGO algo);
void cmph_config_set_tmp_dir(cmph_config_t *mph, cmph_uint8 *tmp_dir);
void cmph_config_set_mphf_fd(cmph_config_t *mph, FILE *mphf_fd);
void cmph_config_set_b(cmph_config_t *mph, cmph_uint32 b);
void cmph_config_set_keys_per_bin(cmph_config_t *mph, cmph_uint32 keys_per_bin);
void cmph_config_set_memory_availability(cmph_config_t *mph, cmph_uint32 memory_availability);
void cmph_config_destroy(cmph_config_t *mph);

/** Hash API **/
cmph_t *cmph_new(cmph_config_t *mph);

/** cmph_uint32 cmph_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);
 *  \brief Computes the mphf value. 
 *  \param mphf pointer to the resulting function
 *  \param key is the key to be hashed
 *  \param keylen is the key legth in bytes
 *  \return The mphf value
 */
cmph_uint32 cmph_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);

cmph_uint32 cmph_size(cmph_t *mphf);
void cmph_destroy(cmph_t *mphf);

/** Hash serialization/deserialization */
int cmph_dump(cmph_t *mphf, FILE *f);
cmph_t *cmph_load(FILE *f);

/** \fn void cmph_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 
 *  \param resulting mphf. The size of packed_mphf must be at least cmph_packed_size() 
 */
void cmph_pack(cmph_t *mphf, void *packed_mphf);

/** \fn cmph_uint32 cmph_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 cmph_packed_size(cmph_t *mphf);

/** cmph_uint32 cmph_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 cmph_search_packed(void *packed_mphf, const char *key, cmph_uint32 keylen);

// TIMING functions. To use the macro CMPH_TIMING must be defined
#include "cmph_time.h"


#ifdef __cplusplus
}
#endif

#endif