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72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
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CompassFile.h
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Wrapper class around a shared pointer to an ifstream. Here the shared pointer is used
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to overcome limitations of the ifstream class, namely that it is written such that ifstream
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cannot be modified by move semantics. Contains all information needed to parse a single binary
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CompassFile. Currently has a class wide defined buffer size; may want to make this user input
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in the future.
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Written by G.W. McCann Oct. 2020
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*/
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#ifndef COMPASSFILE_H
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#define COMPASSFILE_H
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#include "CompassHit.h"
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#include "ShiftMap.h"
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#include <memory>
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class CompassFile
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{
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public:
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CompassFile();
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CompassFile(const std::string& filename);
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CompassFile(const std::string& filename, int bsize);
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~CompassFile();
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void Open(const std::string& filename);
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void Close();
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bool GetNextHit();
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inline bool IsOpen() const { return m_file->is_open(); };
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inline CompassHit GetCurrentHit() const { return m_currentHit; }
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inline std::string GetName() const { return m_filename; }
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inline bool CheckHitHasBeenUsed() const { return hitUsedFlag; } //query to find out if we've used the current hit
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inline void SetHitHasBeenUsed() { hitUsedFlag = true; } //flip the flag to indicate the current hit has been used
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inline bool IsEOF() const { return eofFlag; } //see if we've read all available data
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inline bool* GetUsedFlagPtr() { return &hitUsedFlag; }
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inline void AttachShiftMap(ShiftMap* map) { m_smap = map; }
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inline unsigned int GetSize() const { return m_size; }
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inline unsigned int GetNumberOfHits() const { return m_nHits; }
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private:
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int GetHitSize();
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void ParseNextHit();
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void GetNextBuffer();
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using Buffer = std::vector<char>;
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using FilePointer = std::shared_ptr<std::ifstream>; //to make this class copy/movable
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std::string m_filename;
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Buffer hitBuffer;
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char* bufferIter;
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char* bufferEnd;
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ShiftMap* m_smap; //NOT owned by CompassFile. DO NOT delete
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bool hitUsedFlag;
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int bufsize = 200000; //size of the buffer in hits
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int hitsize = 24; //size of a CompassHit in bytes (without alignment padding)
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int m_buffersize;
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CompassHit m_currentHit;
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FilePointer m_file;
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bool eofFlag;
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unsigned int m_size; //size of the file in bytes
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unsigned int m_nHits; //number of hits in the file (m_size/24)
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};
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#endif
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