61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#ifndef OSRM_COMPRESSED_NODE_BASED_GRAPH_READER_HPP
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#define OSRM_COMPRESSED_NODE_BASED_GRAPH_READER_HPP
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#include "storage/io.hpp"
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#include "util/coordinate.hpp"
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#include "util/typedefs.hpp"
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#include <string>
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#include <vector>
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namespace osrm
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{
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namespace partition
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{
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struct CompressedNodeBasedGraphEdge
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{
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NodeID source;
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NodeID target;
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};
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struct CompressedNodeBasedGraph
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{
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CompressedNodeBasedGraph(storage::io::FileReader &reader)
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{
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// Reads: | Fingerprint | #e | #n | edges | coordinates |
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// - uint64: number of edges (from, to) pairs
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// - uint64: number of nodes and therefore also coordinates
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// - (uint32_t, uint32_t): num_edges * edges
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// - (int32_t, int32_t: num_nodes * coordinates (lon, lat)
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//
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// Gets written in Extractor::WriteCompressedNodeBasedGraph
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const auto num_edges = reader.ReadElementCount64();
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const auto num_nodes = reader.ReadElementCount64();
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edges.resize(num_edges);
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coordinates.resize(num_nodes);
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reader.ReadInto(edges);
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reader.ReadInto(coordinates);
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}
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std::vector<CompressedNodeBasedGraphEdge> edges;
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std::vector<util::Coordinate> coordinates;
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};
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inline CompressedNodeBasedGraph LoadCompressedNodeBasedGraph(const std::string &path)
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{
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const auto fingerprint = storage::io::FileReader::VerifyFingerprint;
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storage::io::FileReader reader(path, fingerprint);
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CompressedNodeBasedGraph graph{reader};
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return graph;
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}
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} // ns partition
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} // ns osrm
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#endif
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