flat_file_types.h

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/******************************************************************************/
/******************************************************************************/

#if !defined(FLAT_FILE_TYPES_H)
#define FLAT_FILE_TYPES_H

#if defined(__cplusplus)
extern "C" {
#endif

#include "../dictionary.h"
#include "../../file/sd_stdio_c_iface.h"

typedef ion_byte_t ion_flat_file_row_status_t;

#define ION_FLAT_FILE_STATUS_OCCUPIED   1

#define ION_FLAT_FILE_STATUS_EMPTY      0

#define ION_FLAT_FILE_SCAN_FORWARDS     1

#define ION_FLAT_FILE_SCAN_BACKWARDS    0

typedef struct {
    ion_dictionary_parent_t super;
    ion_boolean_t           sorted_mode;
    ion_fpos_t              start_of_data;
    ion_fpos_t              eof_position;
    ion_dictionary_size_t   num_buffered;
    ion_byte_t              *buffer;
    FILE                    *data_file;
    size_t                  row_size;
    ion_fpos_t  current_loaded_region;
    size_t      num_in_buffer;
} ion_flat_file_t;

typedef struct {
    ion_flat_file_row_status_t  row_status;
    ion_key_t                   key;
    ion_value_t                 value;
} ion_flat_file_row_t;

typedef ion_boolean_t (*ion_flat_file_predicate_t)(
    ion_flat_file_t *,
    ion_flat_file_row_t *,
    va_list *args
);

typedef struct {
    ion_dict_cursor_t   super;
    ion_fpos_t          current_location;
} ion_flat_file_cursor_t;

#if defined(__cplusplus)
}
#endif

#endif