121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
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#ifndef OSRM_EXTRACTOR_NAME_TABLE_HPP
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#define OSRM_EXTRACTOR_NAME_TABLE_HPP
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#include "util/indexed_data.hpp"
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#include "util/string_view.hpp"
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#include "util/typedefs.hpp"
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#include <string>
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namespace osrm
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{
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namespace extractor
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{
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namespace detail
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{
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template <storage::Ownership Ownership> class NameTableImpl;
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}
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namespace serialization
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{
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template <storage::Ownership Ownership>
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inline void read(storage::tar::FileReader &reader,
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const std::string &name,
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detail::NameTableImpl<Ownership> &index_data);
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template <storage::Ownership Ownership>
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inline void write(storage::tar::FileWriter &writer,
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const std::string &name,
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const detail::NameTableImpl<Ownership> &index_data);
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}
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namespace detail
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{
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// This class provides a limited view over all the string data we serialize out.
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// The following functions are a subset of what is available.
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// See the data facades for they provide full access to this serialized string data.
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// Way string data is stored in blocks based on `id` as follows:
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//
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// | name | destination | pronunciation | ref | exits
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// ^ ^
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// [range)
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// ^ id + 2
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//
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// `id + offset` gives us the range of chars.
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//
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// Offset 0 is name, 1 is destination, 2 is pronunciation, 3 is ref, 4 is exits
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// See datafacades and extractor callbacks for details.
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template <storage::Ownership Ownership> class NameTableImpl
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{
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public:
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using IndexedData =
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util::detail::IndexedDataImpl<util::VariableGroupBlock<16, util::StringView>, Ownership>;
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using ResultType = typename IndexedData::ResultType;
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using ValueType = typename IndexedData::ValueType;
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NameTableImpl() {}
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NameTableImpl(IndexedData indexed_data_) : indexed_data{std::move(indexed_data_)} {}
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util::StringView GetNameForID(const NameID id) const
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{
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if (id == INVALID_NAMEID)
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return {};
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return indexed_data.at(id + 0);
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}
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util::StringView GetDestinationsForID(const NameID id) const
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{
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if (id == INVALID_NAMEID)
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return {};
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return indexed_data.at(id + 1);
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}
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util::StringView GetExitsForID(const NameID id) const
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{
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if (id == INVALID_NAMEID)
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return {};
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return indexed_data.at(id + 4);
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}
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util::StringView GetRefForID(const NameID id) const
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{
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if (id == INVALID_NAMEID)
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return {};
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const constexpr auto OFFSET_REF = 3u;
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return indexed_data.at(id + OFFSET_REF);
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}
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util::StringView GetPronunciationForID(const NameID id) const
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{
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if (id == INVALID_NAMEID)
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return {};
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const constexpr auto OFFSET_PRONUNCIATION = 2u;
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return indexed_data.at(id + OFFSET_PRONUNCIATION);
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}
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friend void serialization::read<Ownership>(storage::tar::FileReader &reader,
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const std::string &name,
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NameTableImpl &index_data);
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friend void serialization::write<Ownership>(storage::tar::FileWriter &writer,
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const std::string &name,
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const NameTableImpl &index_data);
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private:
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IndexedData indexed_data;
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};
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}
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using NameTable = detail::NameTableImpl<storage::Ownership::Container>;
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using NameTableView = detail::NameTableImpl<storage::Ownership::View>;
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} // namespace extractor
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} // namespace osrm
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#endif // OSRM_EXTRACTOR_NAME_TABLE_HPP
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