VLATapeIO.h

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//# <VLATapeIO.h>: this defines <VLATapeIO>, which ...
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#ifndef NRAO_VLATAPEIO_H
#define NRAO_VLATAPEIO_H

//# Forward Declarations

// <summary>
// This class this defines VLATapeIO
// </summary>

// <use visibility=local>   or   <use visibility=export>

// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>

// <prerequisite>
//   <li> SomeClass
//   <li> SomeOtherClass
//   <li> some concept
// </prerequisite>
//
// <etymology>
// </etymology>
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// <synopsis>
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// </thrown>
//
// <todo asof="yyyy/mm/dd">
//   <li> add this feature
//   <li> fix this bug
//   <li> start discussion of this possible extension
// </todo>



#include <casa/aips.h>
#include <casa/BasicSL/String.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <casa/namespace.h>
// kludge for tapes until we do something specific.
//  It''s pretty much a thin vaneer that sits on top of rmt.

Int rmtopen(casacore::Char *, casacore::Int, casacore::Int);
Int rmtread(casacore::Int, casacore::Char *, casacore::uInt);
Int rmtwrite(casacore::Int, casacore::Char *, casacore::uInt);
Int rmtaccess(casacore::Char *, casacore::uInt);
Int rmtclose(casacore::Int);

class VLATapeIO {
   public :
      VLATapeIO() : tapeId(-1){}
      VLATapeIO(const casacore::String &a) : inOut(O_RDONLY), tPosition(0){
                                tapeId = open((casacore::Char *)(a.chars()), inOut, tPosition);
                                }
      VLATapeIO(const casacore::String &a, casacore::Int rwFlag, casacore::Int tpos) : inOut(rwFlag),
                                                      tPosition(tpos){
                              tapeId = open((casacore::Char *)(a.chars()), inOut, tPosition);
                              }
     ~VLATapeIO(){if(tapeId != -1)rmtclose(tapeId);}
      casacore::Int  open(const casacore::String &a, casacore::Int b, casacore::Int c){
                tapeId = rmtopen((casacore::Char *)(a.chars()), b, c);
                return tapeId;}
      casacore::Int  read(casacore::Char *buf, casacore::uInt nsize){return rmtread(tapeId, buf, nsize);}
      //casacore::Int  write(casacore::Char *buf, casacore::uInt nsize){return rmtwrite(tapeId, buf, nsize);}
      casacore::Int  access(const casacore::Char *a, casacore::uInt b){return rmtaccess((casacore::Char *)a, b);}
      casacore::Int close(){return rmtclose(tapeId);}
   private :
      casacore::Int inOut;
      casacore::Int tapeId;
      casacore::Int tPosition;
};
#endif