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62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
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#include <DB/Core/Types.h>
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#include <DB/Common/Exception.h>
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#include <DB/IO/ReadBuffer.h>
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#include <DB/IO/WriteBuffer.h>
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#include <DB/IO/VarInt.h>
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#include <DB/IO/ReadHelpers.h>
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#include <DB/IO/WriteHelpers.h>
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#include <DB/Core/BlockInfo.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int UNKNOWN_BLOCK_INFO_FIELD;
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}
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/// Записать значения в бинарном виде. NOTE: Можно было бы использовать protobuf, но он был бы overkill для данного случая.
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void BlockInfo::write(WriteBuffer & out) const
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{
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/// Набор пар FIELD_NUM, значение в бинарном виде. Затем 0.
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#define WRITE_FIELD(TYPE, NAME, DEFAULT, FIELD_NUM) \
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writeVarUInt(FIELD_NUM, out); \
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writeBinary(NAME, out);
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APPLY_FOR_BLOCK_INFO_FIELDS(WRITE_FIELD);
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#undef WRITE_FIELD
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writeVarUInt(0, out);
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}
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/// Прочитать значения в бинарном виде.
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void BlockInfo::read(ReadBuffer & in)
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{
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UInt64 field_num = 0;
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while (true)
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{
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readVarUInt(field_num, in);
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if (field_num == 0)
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break;
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switch (field_num)
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{
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#define READ_FIELD(TYPE, NAME, DEFAULT, FIELD_NUM) \
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case FIELD_NUM: \
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readBinary(NAME, in); \
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break;
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APPLY_FOR_BLOCK_INFO_FIELDS(READ_FIELD);
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#undef READ_FIELD
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default:
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throw Exception("Unknown BlockInfo field number: " + toString(field_num), ErrorCodes::UNKNOWN_BLOCK_INFO_FIELD);
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}
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}
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}
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}
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