/usr/include/casacore/casa/OS/DataConversion.h is in casacore-dev 2.2.0-2.
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//# 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: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef CASA_DATACONVERSION_H
#define CASA_DATACONVERSION_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/casa/OS/Conversion.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
// <summary>
// Abstract base class with functions to convert any format
// </summary>
// <use visibility=export>
// <reviewed reviewer="Friso Olnon" date="1996/11/06" tests="tDataConversion" demos="">
// </reviewed>
// <synopsis>
// This abstract base class contains pure virtual functions to convert
// from any foreign data format to local format and vice-versa.
// Classes derived from it implement the functions for a specific
// foreign format (e.g.
// <linkto class=CanonicalDataConversion:description>CanonicalDataConversion
// </linkto>,
// <linkto class=VAXDataConversion:description>VAXDataConversion</linkto>,
// <linkto class=IBMDataConversion:description>IBMDataConversion</linkto>).
// <linkto class=RawDataConversion:description>RawDataConversion</linkto>).
// </synopsis>
// <example>
// <srcblock>
// // Construct the correct conversion object.
// DataConversion* conv = new IBMDataConversion();
// // Say that you read a block of 256 floats (in IBM-format).
// char buffer[1024];
// read (fd, buffer, 1024);
// // Convert the float to local format.
// float values[256];
// conv->toLocal (values, buffer, 256);
// </srcblock>
// </example>
// <motivation>
// The abstract base class allows one to construct the correct conversion
// object at the beginning. Thereafter this base class can be used and
// polymorphism takes care of picking the correct functions.
// </motivation>
// <todo asof="$DATE$">
// <li> Support data type long double.
// </todo>
class DataConversion
{
public:
// Construct the object.
DataConversion();
virtual ~DataConversion();
// Convert one value from foreign format to local format.
// The from and to buffer should not overlap.
// <note>
// The char version handles characters (thus may involve conversion
// EBCDIC to ASCII), while the unsigned chars are simply bytes.
// </note>
// <group>
virtual size_t toLocal (char& to,
const void* from) const = 0;
virtual size_t toLocal (unsigned char& to,
const void* from) const = 0;
virtual size_t toLocal (short& to,
const void* from) const = 0;
virtual size_t toLocal (unsigned short& to,
const void* from) const = 0;
virtual size_t toLocal (int& to,
const void* from) const = 0;
virtual size_t toLocal (unsigned int& to,
const void* from) const = 0;
virtual size_t toLocal (Int64& to,
const void* from) const = 0;
virtual size_t toLocal (uInt64& to,
const void* from) const = 0;
virtual size_t toLocal (float& to,
const void* from) const = 0;
virtual size_t toLocal (double& to,
const void* from) const = 0;
// </group>
// Convert nr values from foreign format to local format.
// The from and to buffer should not overlap.
// <note>
// The char version handles characters (thus may involve conversion
// EBCDIC to ASCII), while the unsigned chars are simply bytes.
// </note>
// <group>
virtual size_t toLocal (char* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (unsigned char* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (short* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (unsigned short* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (int* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (unsigned int* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (Int64* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (uInt64* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (float* to, const void* from,
size_t nr) const = 0;
virtual size_t toLocal (double* to, const void* from,
size_t nr) const = 0;
// </group>
// Convert one value from local format to foreign format.
// The from and to buffer should not overlap.
// <note>
// The char version handles characters (thus may involve conversion
// ASCII to EBCDIC), while the unsigned chars are simply bytes.
// </note>
// <group>
virtual size_t fromLocal (void* to, char from) const = 0;
virtual size_t fromLocal (void* to, unsigned char from) const = 0;
virtual size_t fromLocal (void* to, short from) const = 0;
virtual size_t fromLocal (void* to, unsigned short from) const = 0;
virtual size_t fromLocal (void* to, int from) const = 0;
virtual size_t fromLocal (void* to, unsigned int from) const = 0;
virtual size_t fromLocal (void* to, Int64 from) const = 0;
virtual size_t fromLocal (void* to, uInt64 from) const = 0;
virtual size_t fromLocal (void* to, float from) const = 0;
virtual size_t fromLocal (void* to, double from) const = 0;
// </group>
// Convert nr values from local format to foreign format.
// The from and to buffer should not overlap.
// <note>
// The char version handles characters (thus may involve conversion
// ASCII to EBCDIC), while the unsigned chars are simply bytes.
// </note>
// <group>
virtual size_t fromLocal (void* to, const char* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const unsigned char* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const short* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const unsigned short* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const int* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const unsigned int* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const Int64* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const uInt64* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const float* from,
size_t nr) const = 0;
virtual size_t fromLocal (void* to, const double* from,
size_t nr) const = 0;
// </group>
// Determine if the data for a data type can be simply copied, thus
// if no conversion is needed.
// <group>
virtual Bool canCopy (const char*) const = 0;
virtual Bool canCopy (const unsigned char*) const = 0;
virtual Bool canCopy (const short*) const = 0;
virtual Bool canCopy (const unsigned short*) const = 0;
virtual Bool canCopy (const int*) const = 0;
virtual Bool canCopy (const unsigned int*) const = 0;
virtual Bool canCopy (const Int64*) const = 0;
virtual Bool canCopy (const uInt64*) const = 0;
virtual Bool canCopy (const float*) const = 0;
virtual Bool canCopy (const double*) const = 0;
// </group>
// Get the external size of the data type.
// <group>
virtual unsigned int externalSize (const char*) const = 0;
virtual unsigned int externalSize (const unsigned char*) const = 0;
virtual unsigned int externalSize (const short*) const = 0;
virtual unsigned int externalSize (const unsigned short*) const = 0;
virtual unsigned int externalSize (const int*) const = 0;
virtual unsigned int externalSize (const unsigned int*) const = 0;
virtual unsigned int externalSize (const Int64*) const = 0;
virtual unsigned int externalSize (const uInt64*) const = 0;
virtual unsigned int externalSize (const float*) const = 0;
virtual unsigned int externalSize (const double*) const = 0;
// </group>
};
inline DataConversion::DataConversion()
{}
} //# NAMESPACE CASACORE - END
#endif
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