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Built in ReadVarInt64Array for geometry loading.

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vng 2011-01-09 11:14:45 +02:00 • committed by Alex Zolotarev
parent 6023581a16
commit 044b8301fa
1 changed files with 32 additions and 16 deletions
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48
indexer/feature_impl.hpp
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@ -34,39 +34,60 @@ namespace feature
template <class TSink>
void WriteCells(vector<int64_t> & cells, TSink & sink)
{
vector<char> buffer;
MemWriter<vector<char> > writer(buffer);
for (size_t i = 0; i < cells.size(); ++i)
WriteVarInt(sink, i == 0 ? cells[0] : cells[i] - cells[i-1]);
WriteVarInt(writer, i == 0 ? cells[0] : cells[i] - cells[i-1]);
uint32_t const count = static_cast<uint32_t>(buffer.size());
WriteVarUint(sink, count);
sink.Write(&buffer[0], count);
}
class points_emitter
{
vector<m2::PointD> & m_points;
int64_t m_id;
public:
points_emitter(vector<m2::PointD> & points, uint32_t count)
: m_points(points), m_id(0)
{
m_points.reserve(count / 2);
}
void operator() (int64_t id)
{
m_points.push_back(pts::ToPoint(m_id += id));
}
};
template <class TSource>
void ReadPoints(vector<m2::PointD> & points, TSource & src)
{
int64_t id = 0;
for (size_t i = 0; i < points.size(); ++i)
points[i] = pts::ToPoint(id += ReadVarInt<int64_t>(src));
uint32_t const count = ReadVarUint<uint32_t>(src);
vector<char> buffer(count);
char * p = &buffer[0];
src.Read(p, count);
ReadVarInt64Array(p, p + count, points_emitter(points, count));
}
}
template <class TSink>
void SavePoints(vector<m2::PointD> const & points, TSink & sink)
{
uint32_t const count = points.size();
ASSERT_GREATER(count, 1, ());
ASSERT_GREATER(points.size(), 1, ());
vector<int64_t> cells;
detail::TransformPoints(points, cells);
WriteVarUint(sink, count - 2);
detail::WriteCells(cells, sink);
}
template <class TSource>
void LoadPoints(vector<m2::PointD> & points, TSource & src)
{
uint32_t const count = ReadVarUint<uint32_t>(src) + 2;
points.resize(count);
detail::ReadPoints(points, src);
}
@ -80,17 +101,12 @@ namespace feature
vector<int64_t> cells;
detail::TransformPoints(triangles, cells);
WriteVarUint(sink, count / 3 - 1);
detail::WriteCells(cells, sink);
}
template <class TSource>
void LoadTriangles(vector<m2::PointD> & points, TSource & src)
{
uint32_t const count = 3 * (ReadVarUint<uint32_t>(src) + 1);
points.resize(count);
detail::ReadPoints(points, src);
}