DcmInputFileStream Class Reference

input stream that reads from a plain file More...

Inheritance diagram for DcmInputFileStream:

Public Member Functions
	DcmInputFileStream (const OFFilename &filename, offile_off_t offset=0)
	constructor More...
virtual	~DcmInputFileStream ()
	destructor
virtual DcmInputStreamFactory *	newFactory () const
	creates a new factory object for the current stream and stream position. More...
Public Member Functions inherited from DcmInputStream
virtual	~DcmInputStream ()
	destructor
virtual OFBool	good () const
	returns the status of the stream. More...
virtual OFCondition	status () const
	returns the status of the stream as an OFCondition object. More...
virtual OFBool	eos ()
	returns true if the producer is at the end of stream. More...
virtual offile_off_t	avail ()
	returns the minimum number of bytes that can be read with the next call to read(). More...
virtual offile_off_t	read (void *buf, offile_off_t buflen)
	reads as many bytes as possible into the given block. More...
virtual offile_off_t	skip (offile_off_t skiplen)
	skips over the given number of bytes (or less) More...
virtual offile_off_t	tell () const
	returns the total number of bytes read from the stream so far More...
virtual OFCondition	installCompressionFilter (E_StreamCompression filterType)
	installs a compression filter for the given stream compression type, which should be neither ESC_none nor ESC_unsupported. More...
virtual void	mark ()
	marks the current stream position for a later putback operation, overwriting a possibly existing prior putback mark. More...
virtual void	putback ()
	resets the stream to the position previously marked with setPutbackMark(). More...

Private Member Functions
	DcmInputFileStream (const DcmInputFileStream &)
	private unimplemented copy constructor
DcmInputFileStream &	operator= (const DcmInputFileStream &)
	private unimplemented copy assignment operator

Private Attributes
DcmFileProducer	producer_
	the final producer of the filter chain
OFFilename	filename_
	filename

Additional Inherited Members
Protected Member Functions inherited from DcmInputStream
	DcmInputStream (DcmProducer *initial)
	protected constructor, to be called from derived class constructor More...
const DcmProducer *	currentProducer () const
	returns pointer to current producer object

Detailed Description

input stream that reads from a plain file

Constructor & Destructor Documentation

DcmInputFileStream::DcmInputFileStream	(	const OFFilename &	filename,
		offile_off_t	offset = 0
	)

constructor

Parameters

filename	name of file to be opened (may contain wide chars if support enabled)
offset	byte offset to skip from the start of file

Member Function Documentation

virtual DcmInputStreamFactory* DcmInputFileStream::newFactory ( ) const

virtual

creates a new factory object for the current stream and stream position.

When activated, the factory will be able to create new DcmInputStream delivering the same data as the current stream. Used to defer loading of value fields until accessed. If no factory object can be created (e.g. because the stream is not seekable), returns NULL.

Returns

pointer to new factory object if successful, NULL otherwise.

Implements DcmInputStream.

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The documentation for this class was generated from the following file:

• dcmdata/include/dcmtk/dcmdata/dcistrmf.h