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#pragma once
#include "indexer/features_offsets_table.hpp"
#include "coding/file_container.hpp"
#include "coding/mmap_reader.hpp"
#include "platform/platform.hpp"
#include "base/scope_guard.hpp"
#include "std/limits.hpp"
#include "std/string.hpp"
#include "std/unordered_map.hpp"
#include "std/utility.hpp"
#include "std/vector.hpp"
#include "3party/succinct/rs_bit_vector.hpp"
#include "3party/succinct/elias_fano_compressed_list.hpp"
#include "defines.hpp"
namespace routing
{
typedef uint32_t TOsrmNodeId;
typedef vector<TOsrmNodeId> TNodesList;
constexpr TOsrmNodeId INVALID_NODE_ID = numeric_limits<TOsrmNodeId>::max();
constexpr uint32_t kInvalidFid = numeric_limits<uint32_t>::max();
namespace OsrmMappingTypes
{
#pragma pack (push, 1)
struct FtSeg
{
uint32_t m_fid;
uint16_t m_pointStart;
uint16_t m_pointEnd;
// No need to initialize something her (for vector<FtSeg>).
FtSeg() {}
FtSeg(uint32_t fid, uint32_t ps, uint32_t pe);
explicit FtSeg(uint64_t x);
uint64_t Store() const;
bool Merge(FtSeg const & other);
bool operator == (FtSeg const & other) const
{
return (other.m_fid == m_fid)
&& (other.m_pointEnd == m_pointEnd)
&& (other.m_pointStart == m_pointStart);
}
bool IsIntersect(FtSeg const & other) const;
bool IsValid() const
{
return m_fid != kInvalidFid;
}
void Swap(FtSeg & other)
{
swap(m_fid, other.m_fid);
swap(m_pointStart, other.m_pointStart);
swap(m_pointEnd, other.m_pointEnd);
}
friend string DebugPrint(FtSeg const & seg);
};
struct SegOffset
{
TOsrmNodeId m_nodeId;
uint32_t m_offset;
SegOffset() : m_nodeId(0), m_offset(0) {}
SegOffset(uint32_t nodeId, uint32_t offset)
: m_nodeId(nodeId), m_offset(offset)
{
}
friend string DebugPrint(SegOffset const & off);
};
#pragma pack (pop)
/// Checks if a smallSeg is inside a bigSeg. Note that the smallSeg must be an ordered segment
/// with 1 point length.
bool IsInside(FtSeg const & bigSeg, FtSeg const & smallSeg);
/// Splits segment by splitter segment and takes part of it.
/// Warning! This function returns part from the start of the segment to the splitter, including it.
/// Splitter segment points must be ordered.
FtSeg SplitSegment(FtSeg const & segment, FtSeg const & splitter);
} // namespace OsrmMappingTypes
class OsrmFtSegMapping;
class OsrmFtSegBackwardIndex
{
succinct::rs_bit_vector m_rankIndex;
vector<TNodesList> m_nodeIds;
unique_ptr<feature::FeaturesOffsetsTable> m_table;
unique_ptr<MmapReader> m_mappedBits;
bool m_oldFormat;
void Save(string const & nodesFileName, string const & bitsFileName);
bool Load(string const & nodesFileName, string const & bitsFileName);
public:
void Construct(OsrmFtSegMapping & mapping, uint32_t maxNodeId,
FilesMappingContainer & routingFile,
platform::LocalCountryFile const & localFile);
TNodesList const & GetNodeIdByFid(uint32_t fid) const;
void Clear();
};
class OsrmFtSegMapping
{
public:
using TFtSegVec = vector<OsrmMappingTypes::FtSeg>;
void Clear();
void Load(FilesMappingContainer & cont, platform::LocalCountryFile const & localFile);
void Map(FilesMappingContainer & cont);
void Unmap();
bool IsMapped() const;
template <class ToDo> void ForEachFtSeg(TOsrmNodeId nodeId, ToDo toDo) const
{
pair<size_t, size_t> r = GetSegmentsRange(nodeId);
while (r.first != r.second)
{
OsrmMappingTypes::FtSeg s(m_segments[r.first]);
if (s.IsValid())
toDo(s);
++r.first;
}
}
typedef unordered_map<uint64_t, pair<TOsrmNodeId, TOsrmNodeId> > OsrmNodesT;
void GetOsrmNodes(TFtSegVec const & segments, OsrmNodesT & res) const;
void GetSegmentByIndex(size_t idx, OsrmMappingTypes::FtSeg & seg) const;
TNodesList const & GetNodeIdByFid(uint32_t fid) const
{
return m_backwardIndex.GetNodeIdByFid(fid);
}
/// @name For debug purpose only.
//@{
void DumpSegmentsByFID(uint32_t fID) const;
void DumpSegmentByNode(TOsrmNodeId nodeId) const;
//@}
/// @name For unit test purpose only.
//@{
/// @return STL-like range [s, e) of segments indexies for passed node.
pair<size_t, size_t> GetSegmentsRange(TOsrmNodeId nodeId) const;
/// @return Node id for segment's index.
TOsrmNodeId GetNodeId(uint32_t segInd) const;
size_t GetSegmentsCount() const { return static_cast<size_t>(m_segments.size()); }
//@}
protected:
typedef vector<OsrmMappingTypes::SegOffset> SegOffsetsT;
SegOffsetsT m_offsets;
private:
succinct::elias_fano_compressed_list m_segments;
FilesMappingContainer::Handle m_handle;
OsrmFtSegBackwardIndex m_backwardIndex;
};
class OsrmFtSegMappingBuilder : public OsrmFtSegMapping
{
public:
OsrmFtSegMappingBuilder();
typedef vector<OsrmMappingTypes::FtSeg> FtSegVectorT;
void Append(TOsrmNodeId nodeId, FtSegVectorT const & data);
void Save(FilesContainerW & cont) const;
private:
vector<uint64_t> m_buffer;
uint64_t m_lastOffset;
};
}
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