RawDataConversion.h

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// # RawDataConversion.h: A class with virtual functions to copy without conversion
// # Copyright (C) 1996,1999,2001
// # Associated Universities, Inc. Washington DC, USA.
// #
// # This library is free software; you can redistribute it and/or modify it
// # under the terms of the GNU Library General Public License as published by
// # the Free Software Foundation; either version 2 of the License, or (at your
// # option) any later version.
// #
// # This library 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 Library General Public
// # License for more details.
// #
// # You should have received a copy of the GNU Library General Public License
// # along with this library; if not, write to the Free Software Foundation,
// # Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
// #
// # Correspondence concerning AIPS++ should be addressed as follows:
// #        Internet email: casa-feedback@nrao.edu.
// #        Postal address: AIPS++ Project Office
// #                        National Radio Astronomy Observatory
// #                        520 Edgemont Road
// #                        Charlottesville, VA 22903-2475 USA
 
#ifndef CASA_RAWDATACONVERSION_H
#define CASA_RAWDATACONVERSION_H
 
// # Includes
#include <casacore/casa/aips.h>
#include <casacore/casa/OS/DataConversion.h>
 
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// <summary>
// A class with virtual functions to copy without conversion
// </summary>
 
// <use visibility=export>
 
// <reviewed reviewer="Friso Olnon" date="1996/11/06" tests="tDataConversion" demos="">
// </reviewed>
 
// <synopsis>
// This class is a specialization of the abstract base class
// <linkto class=DataConversion>DataConversion</linkto>.
// It contains functions to copy data without conversion.
// <p>
// This class exists to make it possible to use a <src>DataConversion</src>
// object when no conversion is actually needed.
// </synopsis>
 
// <example>
// See example in class <linkto class=DataConversion>DataConversion</linkto>.
// </example>
 
// <motivation>
// This class makes it possible to use the conversion framework
// for operations where a conversion is only a simple copy.
// </motivation>
 
// <todo asof="$DATE$">
//  <li> Support data type long double.
// </todo>
 
class RawDataConversion : public DataConversion {
 public:
  // Construct the object.
  RawDataConversion();
 
  virtual ~RawDataConversion();
 
  // Copy one value from external to local (is a simple memcpy).
  // The from and to buffer should not overlap.
  // <group>
  size_t toLocal(char& to, const void* from) const override;
  size_t toLocal(unsigned char& to, const void* from) const override;
  size_t toLocal(short& to, const void* from) const override;
  size_t toLocal(unsigned short& to, const void* from) const override;
  size_t toLocal(int& to, const void* from) const override;
  size_t toLocal(unsigned int& to, const void* from) const override;
  size_t toLocal(Int64& to, const void* from) const override;
  size_t toLocal(uInt64& to, const void* from) const override;
  size_t toLocal(float& to, const void* from) const override;
  size_t toLocal(double& to, const void* from) const override;
  // </group>
 
  // Copy multiple values from external to local (is a simple memcpy).
  // The from and to buffer should not overlap.
  // <group>
  size_t toLocal(char* to, const void* from, size_t nr) const override;
  size_t toLocal(unsigned char* to, const void* from, size_t nr) const override;
  size_t toLocal(short* to, const void* from, size_t nr) const override;
  size_t toLocal(unsigned short* to, const void* from, size_t nr) const override;
  size_t toLocal(int* to, const void* from, size_t nr) const override;
  size_t toLocal(unsigned int* to, const void* from, size_t nr) const override;
  size_t toLocal(Int64* to, const void* from, size_t nr) const override;
  size_t toLocal(uInt64* to, const void* from, size_t nr) const override;
  size_t toLocal(float* to, const void* from, size_t nr) const override;
  size_t toLocal(double* to, const void* from, size_t nr) const override;
  // </group>
 
  // Copy one value from local to external (is a simple memcpy).
  // The from and to buffer should not overlap.
  // <group>
  size_t fromLocal(void* to, char from) const override;
  size_t fromLocal(void* to, unsigned char from) const override;
  size_t fromLocal(void* to, short from) const override;
  size_t fromLocal(void* to, unsigned short from) const override;
  size_t fromLocal(void* to, int from) const override;
  size_t fromLocal(void* to, unsigned int from) const override;
  size_t fromLocal(void* to, Int64 from) const override;
  size_t fromLocal(void* to, uInt64 from) const override;
  size_t fromLocal(void* to, float from) const override;
  size_t fromLocal(void* to, double from) const override;
  // </group>
 
  // Copy multiple values from local to external (is a simple memcpy).
  // The from and to buffer should not overlap.
  // <group>
  size_t fromLocal(void* to, const char* from, size_t nr) const override;
  size_t fromLocal(void* to, const unsigned char* from, size_t nr) const override;
  size_t fromLocal(void* to, const short* from, size_t nr) const override;
  size_t fromLocal(void* to, const unsigned short* from, size_t nr) const override;
  size_t fromLocal(void* to, const int* from, size_t nr) const override;
  size_t fromLocal(void* to, const unsigned int* from, size_t nr) const override;
  size_t fromLocal(void* to, const Int64* from, size_t nr) const override;
  size_t fromLocal(void* to, const uInt64* from, size_t nr) const override;
  size_t fromLocal(void* to, const float* from, size_t nr) const override;
  size_t fromLocal(void* to, const double* from, size_t nr) const override;
  // </group>
 
  // Determine if the data for a data type can be simply copied, thus
  // if no conversion is needed. This is always True.
  // <group>
  Bool canCopy(const char*) const override;
  Bool canCopy(const unsigned char*) const override;
  Bool canCopy(const short*) const override;
  Bool canCopy(const unsigned short*) const override;
  Bool canCopy(const int*) const override;
  Bool canCopy(const unsigned int*) const override;
  Bool canCopy(const Int64*) const override;
  Bool canCopy(const uInt64*) const override;
  Bool canCopy(const float*) const override;
  Bool canCopy(const double*) const override;
  // </group>
 
  // Get the external size of the data type.
  // This returns the <src>sizeof</src>.
  // <group>
  unsigned int externalSize(const char*) const override;
  unsigned int externalSize(const unsigned char*) const override;
  unsigned int externalSize(const short*) const override;
  unsigned int externalSize(const unsigned short*) const override;
  unsigned int externalSize(const int*) const override;
  unsigned int externalSize(const unsigned int*) const override;
  unsigned int externalSize(const Int64*) const override;
  unsigned int externalSize(const uInt64*) const override;
  unsigned int externalSize(const float*) const override;
  unsigned int externalSize(const double*) const override;
  // </group>
};
 
inline RawDataConversion::RawDataConversion() {}
 
}  // namespace casacore
 
#endif