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58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
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#pragma once
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#include "search/base/text_index/text_index.hpp"
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#include "coding/reader.hpp"
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#include "coding/write_to_sink.hpp"
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#include "base/assert.hpp"
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#include <cstdint>
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#include <string>
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namespace search_base
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{
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struct TextIndexHeader
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{
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template <typename Sink>
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void Serialize(Sink & sink) const
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{
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CHECK_EQUAL(m_version, TextIndexVersion::V0, ());
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sink.Write(kHeaderMagic.data(), kHeaderMagic.size());
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WriteToSink(sink, static_cast<uint8_t>(m_version));
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WriteToSink(sink, m_numTokens);
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WriteToSink(sink, m_dictPositionsOffset);
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WriteToSink(sink, m_dictWordsOffset);
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WriteToSink(sink, m_postingsStartsOffset);
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WriteToSink(sink, m_postingsListsOffset);
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}
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template <typename Source>
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void Deserialize(Source & source)
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{
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CHECK_EQUAL(m_version, TextIndexVersion::V0, ());
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std::string headerMagic(kHeaderMagic.size(), ' ');
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source.Read(&headerMagic[0], headerMagic.size());
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CHECK_EQUAL(headerMagic, kHeaderMagic, ());
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m_version = static_cast<TextIndexVersion>(ReadPrimitiveFromSource<uint8_t>(source));
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CHECK_EQUAL(m_version, TextIndexVersion::V0, ());
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m_numTokens = ReadPrimitiveFromSource<uint32_t>(source);
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m_dictPositionsOffset = ReadPrimitiveFromSource<uint32_t>(source);
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m_dictWordsOffset = ReadPrimitiveFromSource<uint32_t>(source);
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m_postingsStartsOffset = ReadPrimitiveFromSource<uint32_t>(source);
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m_postingsListsOffset = ReadPrimitiveFromSource<uint32_t>(source);
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}
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static std::string const kHeaderMagic;
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TextIndexVersion m_version = TextIndexVersion::Latest;
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uint32_t m_numTokens = 0;
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uint32_t m_dictPositionsOffset = 0;
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uint32_t m_dictWordsOffset = 0;
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uint32_t m_postingsStartsOffset = 0;
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uint32_t m_postingsListsOffset = 0;
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};
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} // namespace search_base
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