File indexing completed on 2024-05-05 04:42:57
0001 /* 0002 SPDX-FileCopyrightText: 2020 Volker Krause <vkrause@kde.org> 0003 0004 SPDX-License-Identifier: LGPL-2.0-or-later 0005 */ 0006 0007 #ifndef OSM_O5MPARSER_H 0008 #define OSM_O5MPARSER_H 0009 0010 #include "kosm_export.h" 0011 #include "abstractreader.h" 0012 0013 #include <cstddef> 0014 #include <cstdint> 0015 #include <vector> 0016 0017 class O5mParserTest; 0018 0019 namespace OSM { 0020 0021 class DataSet; 0022 class DataSetMergeBuffer; 0023 0024 /** Zero-copy parser of O5M binary files. 0025 * @see https://wiki.openstreetmap.org/wiki/O5m 0026 */ 0027 class KOSM_EXPORT O5mParser : public AbstractReader 0028 { 0029 public: 0030 explicit O5mParser(DataSet *dataSet); 0031 0032 private: 0033 void readFromData(const uint8_t *data, std::size_t len) override; 0034 0035 friend class ::O5mParserTest; 0036 0037 uint64_t readUnsigned(const uint8_t *&it, const uint8_t *endIt) const; 0038 int64_t readSigned(const uint8_t *&it, const uint8_t *endIt) const; 0039 template <typename T> 0040 T readDelta(const uint8_t *&it, const uint8_t *endIt, T &deltaState); 0041 0042 const char* readString(const uint8_t *&it, const uint8_t *endIt); 0043 std::pair<const char*, const char*> readStringPair(const uint8_t *&it, const uint8_t *endIt); 0044 0045 void skipVersionInformation(const uint8_t *&it, const uint8_t *end); 0046 template <typename Elem> 0047 void readTagOrBbox(Elem &e, const uint8_t *&it, const uint8_t *endIt); 0048 0049 void readNode(const uint8_t *begin, const uint8_t *end); 0050 void readWay(const uint8_t *begin, const uint8_t *end); 0051 void readRelation(const uint8_t *begin, const uint8_t *end); 0052 0053 // delta coding state 0054 void resetDeltaCodingState(); 0055 0056 int64_t m_nodeIdDelta = 0; 0057 int32_t m_latDelata = 0; // this can overflow, but that is intentional according to the spec! 0058 int32_t m_lonDelta = 0; 0059 0060 int64_t m_wayIdDelta = 0; 0061 int64_t m_wayNodeIdDelta = 0; 0062 0063 int64_t m_relIdDelta = 0; 0064 int64_t m_relNodeMemberIdDelta = 0; 0065 int64_t m_relWayMemberIdDelta = 0; 0066 int64_t m_relRelMemberIdDelta = 0; 0067 0068 std::vector<const char*> m_stringLookupTable; 0069 uint16_t m_stringLookupPosition = 0; 0070 }; 0071 0072 } 0073 0074 #endif // OSM_O5MPARSER_H