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/* -*- c-basic-offset: 2 -*- */
/*
Copyright(C) 2012-2013 Kouhei Sutou <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MRN_MULTIPLE_COLUMN_KEY_CODEC_HPP_
#define MRN_MULTIPLE_COLUMN_KEY_CODEC_HPP_
#include <groonga.h>
#include <mrn_mysql.h>
#include <mrn_mysql_compat.h>
namespace mrn {
class MultipleColumnKeyCodec {
public:
MultipleColumnKeyCodec(grn_ctx *ctx, THD *thread, KEY *key_info);
~MultipleColumnKeyCodec();
int encode(const uchar *mysql_key, uint mysql_key_length,
uchar *grn_key, uint *grn_key_length);
int decode(const uchar *grn_key, uint grn_key_length,
uchar *mysql_key, uint *mysql_key_length);
uint size();
private:
enum DataType {
TYPE_UNKNOWN,
TYPE_LONG_LONG_NUMBER,
TYPE_NUMBER,
TYPE_FLOAT,
TYPE_DOUBLE,
TYPE_BYTE_SEQUENCE,
TYPE_BYTE_REVERSE,
TYPE_BYTE_BLOB
};
grn_ctx *ctx_;
THD *thread_;
KEY *key_info_;
void get_key_info(KEY_PART_INFO *key_part,
DataType *data_type, uint *data_size);
void encode_float(volatile float value, uint data_size, uchar *grn_key);
void decode_float(const uchar *grn_key, uchar *mysql_key, uint data_size);
void encode_double(volatile double value, uint data_size, uchar *grn_key);
void decode_double(const uchar *grn_key, uchar *mysql_key, uint data_size);
void encode_reverse(const uchar *mysql_key, uint data_size, uchar *grn_key);
void decode_reverse(const uchar *grn_key, uchar *mysql_key, uint data_size);
void encode_blob(Field *field,
const uchar *mysql_key, uchar *grn_key, uint *data_size);
};
}
#endif // MRN_MULTIPLE_COLUMN_KEY_CODEC_HPP_
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