mirror of
https://github.com/SatDump/SatDump
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150 lines
No EOL
3.2 KiB
C++
150 lines
No EOL
3.2 KiB
C++
#pragma once
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#include <cstdint>
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#include "common/utils.h"
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#include <fstream>
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/*
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Basic Shapefile parser, based on https://support.esri.com/en/white-paper/279.
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This does not implement the full specification, only NullShape, Point, MultiPoint,
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PolyLine and Polygon are currently implemented.
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*/
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namespace shapefile
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{
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enum ShapeType
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{
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NullShape = 0,
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Point = 1,
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PolyLine = 3,
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Polygon = 5,
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MultiPoint = 8,
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PointZ = 11, // Unsupported
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PolyLineZ = 13, // Unsupported
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PolygonZ = 15, // Unsupported
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MultiPointZ = 18, // Unsupported
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PointM = 21, // Unsupported
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PolyLineM = 23, // Unsupported
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PolygonM = 25, // Unsupported
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MultiPointM = 28, // Unsupported
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MultiPatch = 31 // Unsupported
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};
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#ifdef _WIN32
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#pragma pack(push, 1)
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#endif
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struct box_t
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{
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double box1;
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double box2;
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double box3;
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double box4;
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}
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#ifdef _WIN32
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;
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#else
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__attribute__((packed));
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#endif
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#ifdef _WIN32
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#pragma pack(pop)
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#endif
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#ifdef _WIN32
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#pragma pack(push, 1)
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#endif
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struct point_t
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{
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double x;
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double y;
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}
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#ifdef _WIN32
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;
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#else
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__attribute__((packed));
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#endif
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#ifdef _WIN32
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#pragma pack(pop)
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#endif
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struct ShapefileHeader
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{
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int32_t file_code;
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int32_t unused1;
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int32_t unused2;
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int32_t unused3;
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int32_t unused4;
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int32_t unused5;
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int32_t file_length;
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int32_t version;
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int32_t shape_type;
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double bounding_box_xmin;
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double bounding_box_ymin;
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double bounding_box_xmax;
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double bounding_box_ymax;
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double bounding_box_zmin;
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double bounding_box_zmax;
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double bounding_box_mmin;
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double bounding_box_mmax;
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ShapefileHeader(std::istream &stream);
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};
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struct RecordHeader
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{
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int32_t record_number;
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int32_t content_length;
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int32_t shape_type;
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RecordHeader(std::istream &stream);
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};
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struct NullShapeRecord : RecordHeader
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{
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NullShapeRecord(std::istream &stream, RecordHeader &header);
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};
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struct PointRecord : RecordHeader
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{
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point_t point;
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PointRecord(std::istream &stream, RecordHeader &header);
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};
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struct MultiPointRecord : RecordHeader
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{
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box_t box;
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int32_t point_number;
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std::vector<point_t> points;
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MultiPointRecord(std::istream &stream, RecordHeader &header);
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};
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struct PolyLineRecord : RecordHeader
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{
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box_t box;
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int32_t part_number;
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int32_t point_number;
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std::vector<std::vector<point_t>> parts_points;
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PolyLineRecord(std::istream &stream, RecordHeader &header);
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};
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struct PolygonRecord : public PolyLineRecord // Identical
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{
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PolygonRecord(std::istream &stream, RecordHeader &header);
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};
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struct Shapefile
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{
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ShapefileHeader header;
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std::vector<PointRecord> point_records;
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std::vector<MultiPointRecord> multipoint_records;
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std::vector<PolyLineRecord> polyline_records;
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std::vector<PolygonRecord> polygon_records;
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Shapefile(std::istream &stream);
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};
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}; |