96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
#include "util/name_table.hpp"
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#include "util/exception.hpp"
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#include "util/log.hpp"
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#include <algorithm>
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#include <fstream>
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#include <limits>
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#include <boost/filesystem/fstream.hpp>
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namespace osrm
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{
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namespace util
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{
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NameTable::NameTable(const std::string &filename)
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{
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storage::io::FileReader name_stream_file_reader(filename,
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storage::io::FileReader::HasNoFingerprint);
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// name_stream >> m_name_table;
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m_name_table.ReadARangeTable(name_stream_file_reader);
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unsigned number_of_chars = name_stream_file_reader.ReadElementCount32();
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m_names_char_list.resize(number_of_chars + 1); //+1 gives sentinel element
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m_names_char_list.back() = 0;
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if (number_of_chars > 0)
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{
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name_stream_file_reader.ReadInto(&m_names_char_list[0], number_of_chars);
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}
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else
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{
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util::Log() << "list of street names is empty in construction of name table from: \""
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<< filename << "\"";
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}
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}
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std::string NameTable::GetNameForID(const unsigned name_id) const
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{
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if (std::numeric_limits<unsigned>::max() == name_id)
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{
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return "";
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}
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auto range = m_name_table.GetRange(name_id);
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std::string result;
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result.reserve(range.size());
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if (range.begin() != range.end())
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{
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result.resize(range.back() - range.front() + 1);
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std::copy(m_names_char_list.begin() + range.front(),
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m_names_char_list.begin() + range.back() + 1,
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result.begin());
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}
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return result;
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}
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std::string NameTable::GetRefForID(const unsigned name_id) const
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{
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// Way string data is stored in blocks based on `name_id` as follows:
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//
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// | name | destination | pronunciation | ref |
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// ^ ^
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// [range)
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// ^ name_id + 3
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//
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// `name_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.
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// See datafacades and extractor callbacks for details.
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const constexpr auto OFFSET_REF = 3u;
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return GetNameForID(name_id + OFFSET_REF);
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}
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std::string NameTable::GetPronunciationForID(const unsigned name_id) const
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{
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// Way string data is stored in blocks based on `name_id` as follows:
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//
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// | name | destination | pronunciation | ref |
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// ^ ^
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// [range)
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// ^ name_id + 2
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//
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// `name_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.
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// See datafacades and extractor callbacks for details.
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const constexpr auto OFFSET_PRONUNCIATION = 2u;
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return GetNameForID(name_id + OFFSET_PRONUNCIATION);
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}
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} // namespace util
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} // namespace osrm
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