DcmFileCache Class Reference

This class implements a simple container that stores an input stream, the position of that input stream corresponding to the start of a DICOM element value field contained in the stream and the current "owner" object. More...

Public Member Functions
	DcmFileCache ()
	default constructor
	~DcmFileCache ()
	destructor
OFBool	isUser (void *object) const
	checks if the given object is the current user of this cache returns true if so, false otherwise More...
void	clear ()
	returns object to default constructed state
void	init (DcmInputStream *stream, void *user)
	initializes the file cache with the given stream object and user. More...
DcmInputStream *	getStream ()
	return input stream
offile_off_t	getOffset () const
	return initial stream offset

Private Member Functions
	DcmFileCache (const DcmFileCache &arg)
	private undefined copy constructor More...
DcmFileCache &	operator= (const DcmFileCache &arg)
	private undefined copy assignment operator More...

Private Attributes
DcmInputStream *	stream_
	input stream, may be NULL
offile_off_t	offset_
	offset within stream for initial position
const void *	user_
	object that currently uses the file cache, i.e. has created the stream

Detailed Description

This class implements a simple container that stores an input stream, the position of that input stream corresponding to the start of a DICOM element value field contained in the stream and the current "owner" object.

It is used to keep a single file handle open during multiple calls to DcmElement::getPartialValue(), thus speeding up the reading.

Constructor & Destructor Documentation

DcmFileCache()

DcmFileCache::DcmFileCache ( const DcmFileCache &  arg )

private

private undefined copy constructor

Parameters

arg	documented to avoid doxygen warnings

Member Function Documentation

init()

void DcmFileCache::init ( DcmInputStream *  stream, void *  user  )

inline

initializes the file cache with the given stream object and user.

Parameters

stream	stream object
user	user object

References DcmInputStream::tell().

isUser()

OFBool DcmFileCache::isUser ( void *  object ) const

inline

checks if the given object is the current user of this cache returns true if so, false otherwise

Parameters

object

pointer to "user object"

operator=()

DcmFileCache & DcmFileCache::operator= ( const DcmFileCache &  arg )

private

private undefined copy assignment operator

Parameters

arg	the cache to copy

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

• dcmdata/include/dcmtk/dcmdata/dcfcache.h