Daniel J. Hofmann
accdbe92f0
With @karenzshea's name / ref split (ref. #2857) in master we want to make use of it and reduce `NewName` instructions when ever possible. This is a first step towards #2744 by using the already existing name change heuristic from the extractor now in post-processing as well. Limitations: at the moment we don't have the `SuffixTable` in post-processing; this would require us serializing and subsequently deserializing the table, passing it through from the profiles to the API.
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
#include "util/name_table.hpp"
|
|
#include "util/exception.hpp"
|
|
#include "util/simple_logger.hpp"
|
|
|
|
#include <algorithm>
|
|
#include <fstream>
|
|
#include <limits>
|
|
|
|
#include <boost/filesystem/fstream.hpp>
|
|
|
|
namespace osrm
|
|
{
|
|
namespace util
|
|
{
|
|
|
|
NameTable::NameTable(const std::string &filename)
|
|
{
|
|
boost::filesystem::ifstream name_stream(filename, std::ios::binary);
|
|
|
|
if (!name_stream)
|
|
throw exception("Failed to open " + filename + " for reading.");
|
|
|
|
name_stream >> m_name_table;
|
|
|
|
if (!name_stream)
|
|
throw exception("Unable to deserialize RangeTable for NameTable");
|
|
|
|
unsigned number_of_chars = 0;
|
|
name_stream.read(reinterpret_cast<char *>(&number_of_chars), sizeof(number_of_chars));
|
|
if (!name_stream)
|
|
throw exception("Encountered invalid file, failed to read number of contained chars");
|
|
|
|
m_names_char_list.resize(number_of_chars + 1); //+1 gives sentinel element
|
|
m_names_char_list.back() = 0;
|
|
if (number_of_chars > 0)
|
|
{
|
|
name_stream.read(reinterpret_cast<char *>(&m_names_char_list[0]),
|
|
number_of_chars * sizeof(m_names_char_list[0]));
|
|
}
|
|
else
|
|
{
|
|
util::SimpleLogger().Write(logINFO)
|
|
<< "list of street names is empty in construction of name table from: \"" << filename
|
|
<< "\"";
|
|
}
|
|
if (!name_stream)
|
|
throw exception("Failed to read " + std::to_string(number_of_chars) + " characters from " +
|
|
filename);
|
|
}
|
|
|
|
std::string NameTable::GetNameForID(const unsigned name_id) const
|
|
{
|
|
if (std::numeric_limits<unsigned>::max() == name_id)
|
|
{
|
|
return "";
|
|
}
|
|
auto range = m_name_table.GetRange(name_id);
|
|
|
|
std::string result;
|
|
result.reserve(range.size());
|
|
if (range.begin() != range.end())
|
|
{
|
|
result.resize(range.back() - range.front() + 1);
|
|
std::copy(m_names_char_list.begin() + range.front(),
|
|
m_names_char_list.begin() + range.back() + 1,
|
|
result.begin());
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::string NameTable::GetRefForID(const unsigned name_id) const
|
|
{
|
|
// Way string data is stored in blocks based on `name_id` as follows:
|
|
//
|
|
// | name | destination | pronunciation | ref |
|
|
// ^ ^
|
|
// [range)
|
|
// ^ name_id + 3
|
|
//
|
|
// `name_id + offset` gives us the range of chars.
|
|
//
|
|
// Offset 0 is name, 1 is destination, 2 is pronunciation, 3 is ref.
|
|
// See datafacades and extractor callbacks for details.
|
|
const constexpr auto OFFSET_REF = 3u;
|
|
return GetNameForID(name_id + OFFSET_REF);
|
|
}
|
|
|
|
} // namespace util
|
|
} // namespace osrm
|