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[/] [w11/] [tags/] [w11a_V0.7/] [tools/] [src/] [librw11/] [Rw11VirtTapeTap.hpp] - Rev 36
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// $Id: Rw11VirtTapeTap.hpp 686 2015-06-04 21:08:08Z mueller $ // // Copyright 2015- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de> // // This program is free software; you may redistribute and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation, either version 2, or at your option any later version. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for complete details. // // Revision History: // Date Rev Version Comment // 2015-06-04 686 1.0 Initial version // 2015-05-17 683 0.1 First draft // --------------------------------------------------------------------------- /*! \file \version $Id: Rw11VirtTapeTap.hpp 686 2015-06-04 21:08:08Z mueller $ \brief Declaration of class Rw11VirtTapeTap. */ #ifndef included_Retro_Rw11VirtTapeTap #define included_Retro_Rw11VirtTapeTap 1 #include "Rw11VirtTape.hpp" namespace Retro { class Rw11VirtTapeTap : public Rw11VirtTape { public: explicit Rw11VirtTapeTap(Rw11Unit* punit); ~Rw11VirtTapeTap(); bool Open(const std::string& url, RerrMsg& emsg); virtual bool ReadRecord(size_t nbyt, uint8_t* data, size_t& ndone, int& opcode, RerrMsg& emsg); virtual bool WriteRecord(size_t nbyt, const uint8_t* data, int& opcode, RerrMsg& emsg); virtual bool WriteEof(RerrMsg& emsg); virtual bool SpaceForw(size_t nrec, size_t& ndone, int& opcode, RerrMsg& emsg); virtual bool SpaceBack(size_t nrec, size_t& ndone, int& opcode, RerrMsg& emsg); virtual bool Rewind(int& opcode, RerrMsg& emsg); virtual void Dump(std::ostream& os, int ind=0, const char* text=0) const; // some constants (also defined in cpp) static const uint32_t kMetaEof = 0x00000000; //!< EOF marker static const uint32_t kMetaEom = 0xffffffff; //!< EOM marker static const uint32_t kMeta_M_Perr = 0x80000000; static const uint32_t kMeta_M_Mbz = 0x7fff0000; static const uint32_t kMeta_B_Rlen = 0x0000ffff; protected: bool Seek(size_t seekpos, int dir, RerrMsg& emsg); bool Read(size_t nbyt, uint8_t* data, RerrMsg& emsg); bool Write(size_t nbyt, const uint8_t* data, bool back, RerrMsg& emsg); bool CheckSizeForw(size_t nbyt, const char* text, RerrMsg& emsg); bool CheckSizeBack(size_t nbyt, const char* text, RerrMsg& emsg); void UpdatePos(size_t nbyt, int dir); bool ParseMeta(uint32_t meta, size_t& rlen, bool& perr, RerrMsg& emsg); size_t BytePadding(size_t rlen); bool SetBad(); bool BadTapeMsg(const char* meth, RerrMsg& emsg); void IncPosRecord(int delta); protected: int fFd; //!< file number size_t fSize; //!< file size size_t fPos; //!< file position bool fBad; //!< BAD file format flag bool fPadOdd; //!< do odd byte padding bool fTruncPend; //!< truncate on next write }; } // end namespace Retro #include "Rw11VirtTapeTap.ipp" #endif
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