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