87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
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/*
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class representing the header of a R-Tree-Index file
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*/
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#ifndef RTREEHEADER_H
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#define RTREEHEADER_H
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#include <string>
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#include "TreeHeaderMarker.h"
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namespace fialgebra{
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class RTreeHeader{
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public:
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RTreeHeader(char* bytes, size_t length, size_t pageSize);
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RTreeHeader(size_t pageSize, size_t valueSize, size_t dimension,
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size_t minEntries, size_t root, size_t emptyPage);
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RTreeHeader(char* bytes, size_t length, size_t pageSize, int a);
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~RTreeHeader();
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// Get Version
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char GetVersion();
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// Get/Set Root
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size_t GetRoot();
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void SetRoot(size_t value);
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void SetPageSize (size_t pageSize);
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size_t GetPageSize();
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void SetDimension(size_t value);
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size_t GetDimension();
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void SetValueSize (size_t valueSize);
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size_t GetValueSize();
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size_t GetMinEntries();
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void SetMinEntries(size_t minEntries);
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size_t GetEmptyPage();
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void SetEmptyPage(size_t value);
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char* GetBytes();
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static size_t GetHeaderSize() { return constantSize; }
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TreeHeaderMarker GetMarker();
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void SetMarker(TreeHeaderMarker value);
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std::string ToString() const;
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private:
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// Groesse des Headers
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static size_t constantSize;
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const char currentVersion = 1;
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// Inhalt des Headers als bytes (char*)
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char* m_bytes;
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// Marker, der den Type des Index angibt.
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// sollte im RTree-Baum TreeHeaderMarker::Rtree entsprechen
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char* m_marker;
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// Version der Struktur des Indexes. Die Struktur
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// kann sich theoretisch in spaeteren Version
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// aendern, deshalb hier die Info.
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char* m_version;
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// Seitengroesse
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size_t* m_pageSize,
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* m_valueSize;
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//Mindestanzahl an Einträgen in einem Knoten
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size_t* m_minEntries;
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//Dimension von indexierten Daten
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size_t* m_dimension;
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// Nummer des Wurzel-Knotens
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size_t* m_root;
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// Nummer der ersten Seite der Freiseitenliste
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size_t* m_emptyPage;
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};
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}
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#endif // RTREEHEADER_H
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