Class for IO in a converted format. More...

#include <ConversionIO.h>

Inheritance diagram for casa::ConversionIO:

Public Member Functions
	ConversionIO (DataConversion dataConversion, ByteIO byteIO, uInt bufferLength=4096, Bool takeOver=False)
	Constructor.
	ConversionIO (const ConversionIO &conversionIO)
	The copy constructor uses reference semantics.
ConversionIO &	operator= (const ConversionIO &conversionIO)
	The assignment operator uses reference semantics.
	~ConversionIO ()
	Destructor, deletes allocated memory.
virtual uInt	write (uInt nvalues, const Bool *value)
	Convert the values and write them to the ByteIO object.
virtual uInt	write (uInt nvalues, const Char *data)
virtual uInt	write (uInt nvalues, const uChar *data)
virtual uInt	write (uInt nvalues, const Short *data)
virtual uInt	write (uInt nvalues, const uShort *data)
virtual uInt	write (uInt nvalues, const Int *data)
virtual uInt	write (uInt nvalues, const uInt *data)
virtual uInt	write (uInt nvalues, const Int64 *data)
virtual uInt	write (uInt nvalues, const uInt64 *data)
virtual uInt	write (uInt nvalues, const Float *data)
virtual uInt	write (uInt nvalues, const Double *data)
virtual uInt	write (uInt nvalues, const Complex *value)
virtual uInt	write (uInt nvalues, const DComplex *value)
virtual uInt	write (uInt nvalues, const String *value)
virtual uInt	read (uInt nvalues, Bool *value)
	Read the values from the ByteIO object and convert them.
virtual uInt	read (uInt nvalues, Char *data)
virtual uInt	read (uInt nvalues, uChar *data)
virtual uInt	read (uInt nvalues, Short *data)
virtual uInt	read (uInt nvalues, uShort *data)
virtual uInt	read (uInt nvalues, Int *data)
virtual uInt	read (uInt nvalues, uInt *data)
virtual uInt	read (uInt nvalues, Int64 *data)
virtual uInt	read (uInt nvalues, uInt64 *data)
virtual uInt	read (uInt nvalues, Float *data)
virtual uInt	read (uInt nvalues, Double *data)
virtual uInt	read (uInt nvalues, Complex *value)
virtual uInt	read (uInt nvalues, DComplex *value)
virtual uInt	read (uInt nvalues, String *value)
Private Member Functions
void	init ()

Private Attributes
CountedPtr< DataConversion >	itsConversion
uInt	itsSizeChar
uInt	itsSizeuChar
uInt	itsSizeShort
uInt	itsSizeuShort
uInt	itsSizeInt
uInt	itsSizeuInt
uInt	itsSizeInt64
uInt	itsSizeuInt64
uInt	itsSizeFloat
uInt	itsSizeDouble
Bool	itsCopyChar
Bool	itsCopyuChar
Bool	itsCopyShort
Bool	itsCopyuShort
Bool	itsCopyInt
Bool	itsCopyuInt
Bool	itsCopyInt64
Bool	itsCopyuInt64
Bool	itsCopyFloat
Bool	itsCopyDouble
char *	itsBuffer
uInt	itsBufferLength

Detailed Description

Class for IO in a converted format.

Intended use:

Public interface

 <h3>Review Status</h3><dl><dt>Reviewed By:<dd>Friso Olnon<dt>Date Reviewed:<dd>1996/11/06<dt>Test programs:<dd>tTypeIO</dl>

Prerequisite

ByteIO class and derived classes
TypeIO class
DataConversion

Synopsis

ConversionIO is a specialization of class TypeIO to store data in a converted format.

The class converts the data to/from external data and reads/writes them from/into the ByteIO object given at construction time. Conversion is only done when really needed. If not needed, the data is directly read or written.

This class is useful when data can be stored in one of multiple formats. Only at construction time the correct DataConversion class has to be given. Thereafter polymorphism ensures that the correct conversion is done when reading or writing.

Definition at line 74 of file ConversionIO.h.

Constructor & Destructor Documentation

casa::ConversionIO::ConversionIO	(	DataConversion *	dataConversion,
		ByteIO *	byteIO,
		uInt	bufferLength = `4096`,
		Bool	takeOver = `False`
	)

Constructor.

The read/write functions will use the given ByteIO object as the data store and the given DataConversion object as the conversion engine.

The read and write functions use an intermediate buffer to hold the data in canonical format. For small arrays it uses a fixed buffer with length bufferLength. For arrays not fitting in this buffer, it uses a temporary buffer allocated on the heap.

If takeOver is True this this class will be responsible for deleting the DataConversion and ByteIO pointers. Otherwise it is the callers responsibility.

casa::ConversionIO::ConversionIO ( const ConversionIO & conversionIO )

The copy constructor uses reference semantics.

casa::ConversionIO::~ConversionIO ( )

Destructor, deletes allocated memory.

Member Function Documentation

void casa::ConversionIO::init ( ) [private]

Initialize the itsSize and itsCopy variables.

ConversionIO& casa::ConversionIO::operator= ( const ConversionIO & conversionIO )

The assignment operator uses reference semantics.

virtual uInt casa::ConversionIO::read	(	uInt	nvalues,
		Bool *	value
	)		`[virtual]`

Read the values from the ByteIO object and convert them.

Bool, complex and String values are handled by the base class.

Reimplemented from casa::TypeIO.

virtual uInt casa::ConversionIO::read	(	uInt	nvalues,
		Char *	data
	)		`[virtual]`

virtual uInt casa::ConversionIO::write	(	uInt	nvalues,
		const Bool *	value
	)		`[virtual]`

Public Member Functions

Private Member Functions