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97f2a2213e
* Move some code outside dbms/src folder * Fix paths
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#pragma once
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#include <tuple>
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#include <Core/Types.h>
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#include <IO/WriteHelpers.h>
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#include <Common/PODArray.h>
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namespace DB
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{
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/** Mark is the position in the compressed file. The compressed file consists of adjacent compressed blocks.
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* Mark is a tuple - the offset in the file to the start of the compressed block, the offset in the decompressed block to the start of the data.
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*/
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struct MarkInCompressedFile
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{
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size_t offset_in_compressed_file;
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size_t offset_in_decompressed_block;
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bool operator==(const MarkInCompressedFile & rhs) const
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{
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return std::tie(offset_in_compressed_file, offset_in_decompressed_block)
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== std::tie(rhs.offset_in_compressed_file, rhs.offset_in_decompressed_block);
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}
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bool operator!=(const MarkInCompressedFile & rhs) const
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{
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return !(*this == rhs);
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}
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String toString() const
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{
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return "(" + DB::toString(offset_in_compressed_file) + "," + DB::toString(offset_in_decompressed_block) + ")";
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}
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String toStringWithRows(size_t rows_num)
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{
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return "(" + DB::toString(offset_in_compressed_file) + "," + DB::toString(offset_in_decompressed_block) + "," + DB::toString(rows_num) + ")";
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}
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};
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class MarksInCompressedFile : public PODArray<MarkInCompressedFile>
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{
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public:
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MarksInCompressedFile(size_t n) : PODArray(n) {}
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void read(ReadBuffer & buffer, size_t from, size_t count)
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{
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buffer.readStrict(reinterpret_cast<char *>(data() + from), count * sizeof(MarkInCompressedFile));
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}
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};
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}
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