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#ifndef __CMPH_SELECT_H__
#define __CMPH_SELECT_H__
#include "cmph_types.h"
struct _select_t
{
cmph_uint32 n,m;
cmph_uint32 * bits_vec;
cmph_uint32 * select_table;
};
typedef struct _select_t select_t;
void select_init(select_t * sel);
void select_destroy(select_t * sel);
void select_generate(select_t * sel, cmph_uint32 * keys_vec, cmph_uint32 n, cmph_uint32 m);
cmph_uint32 select_query(select_t * sel, cmph_uint32 one_idx);
cmph_uint32 select_next_query(select_t * sel, cmph_uint32 vec_bit_idx);
cmph_uint32 select_get_space_usage(select_t * sel);
void select_dump(select_t *sel, char **buf, cmph_uint32 *buflen);
void select_load(select_t * sel, const char *buf, cmph_uint32 buflen);
/** \fn void select_pack(select_t *sel, void *sel_packed);
* \brief Support the ability to pack a select structure into a preallocated contiguous memory space pointed by sel_packed.
* \param sel points to the select structure
* \param sel_packed pointer to the contiguous memory area used to store the select structure. The size of sel_packed must be at least @see select_packed_size
*/
void select_pack(select_t *sel, void *sel_packed);
/** \fn cmph_uint32 select_packed_size(select_t *sel);
* \brief Return the amount of space needed to pack a select structure.
* \return the size of the packed select structure or zero for failures
*/
cmph_uint32 select_packed_size(select_t *sel);
/** \fn cmph_uint32 select_query_packed(void * sel_packed, cmph_uint32 one_idx);
* \param sel_packed is a pointer to a contiguous memory area
* \param one_idx is the rank for which we want to calculate the inverse function select
* \return an integer that represents the select value of rank idx.
*/
cmph_uint32 select_query_packed(void * sel_packed, cmph_uint32 one_idx);
/** \fn cmph_uint32 select_next_query_packed(void * sel_packed, cmph_uint32 vec_bit_idx);
* \param sel_packed is a pointer to a contiguous memory area
* \param vec_bit_idx is a value prior computed by @see select_query_packed
* \return an integer that represents the next select value greater than @see vec_bit_idx.
*/
cmph_uint32 select_next_query_packed(void * sel_packed, cmph_uint32 vec_bit_idx);
#endif
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