Abstract base class for low-level reader engines. More...

Inheritance diagram for cmtk::CompressedStream::ReaderBase:

Public Types
typedef ReaderBase	Self
	This class.
typedef SmartPointer< Self >	SmartPtr
	Smart pointer to this class.
Public Member Functions
	ReaderBase ()
	Default constructor.
virtual void	Close ()=0
	Close current file stream.
virtual void	Rewind ()
	Reset read pointer to beginning of stream.
virtual int	Seek (const long int offset, int whence)
	Set filepointer.
virtual size_t	Read (void *data, size_t size, size_t count)=0
	Read block of data.
virtual bool	Get (char &c)=0
	Read a single character from the stream.
virtual int	Tell () const =0
	Return number of bytes read from stream.
virtual bool	Feof () const =0
	Return 1 if and only if end of file reached.
Protected Attributes
size_t	m_BytesRead
	Count number of bytes read from file or pipe.
Static Private Attributes
static const size_t	SeekBlockSize = 8192
	Block size for fake seek() operation.

Detailed Description

Abstract base class for low-level reader engines.

Definition at line 201 of file cmtkCompressedStream.h.

Member Typedef Documentation

typedef ReaderBase cmtk::CompressedStream::ReaderBase::Self

This class.

Reimplemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

Definition at line 205 of file cmtkCompressedStream.h.

typedef SmartPointer<Self> cmtk::CompressedStream::ReaderBase::SmartPtr

Smart pointer to this class.

Reimplemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

Definition at line 208 of file cmtkCompressedStream.h.

Constructor & Destructor Documentation

cmtk::CompressedStream::ReaderBase::ReaderBase ( ) [inline]

Default constructor.

Definition at line 211 of file cmtkCompressedStream.h.

Member Function Documentation

virtual void cmtk::CompressedStream::ReaderBase::Close ( ) [pure virtual]

Close current file stream.

Implemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

virtual bool cmtk::CompressedStream::ReaderBase::Feof ( ) const [pure virtual]

Return 1 if and only if end of file reached.

Implemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

virtual bool cmtk::CompressedStream::ReaderBase::Get ( char & c ) [pure virtual]

Read a single character from the stream.

Implemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

virtual size_t cmtk::CompressedStream::ReaderBase::Read	(	void *	data,
		size_t	size,
		size_t	count
	)		`[pure virtual]`

Read block of data.

Implemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

Referenced by Seek().

virtual void cmtk::CompressedStream::ReaderBase::Rewind ( ) [inline, virtual]

Reset read pointer to beginning of stream.

Reimplemented in cmtk::CompressedStream::File, cmtk::CompressedStream::Pipe, and cmtk::CompressedStream::Zlib.

Definition at line 217 of file cmtkCompressedStream.h.

Referenced by Seek().

int cmtk::CompressedStream::ReaderBase::Seek	(	const long int	offset,
		int	whence
	)		`[virtual]`

Set filepointer.

This class implements a naive seek that optionally calls "this->Rewind()" (if "whence" is SEEK_SET, then reads "offset" bytes from the input to position read pointer.

Parameters: