ml::MLImageFormatAbstractFileHandle Class Reference

A base class for abstract read/write access of the MLImageFileFormat. More...

#include <mlImageFormatFileAccess.h>

Inheritance diagram for ml::MLImageFormatAbstractFileHandle:

Public Member Functions
	MLImageFormatAbstractFileHandle ()
	Standard constructor.
virtual	~MLImageFormatAbstractFileHandle ()
	Destructor to clean up. Reimplement to close the file.
MLuint8 *	read (MLuint startPosition, MLuint numBytes)
	Convenience method that reads the given block and returns an array that needs to be freed by free().
virtual bool	read (MLuint8 *data, MLuint startPosition, MLuint numBytes)=0
	Reads the given block and returns true if numBytes have been read.
virtual MLErrorCode	write (MLuint startPos, const MLuint8 *data, size_t length)=0
	Writes the given block.
virtual MLint64	getFileSize ()=0
	Returns the current complete file size.
virtual MLErrorCode	close ()=0
	Closes the file.

Detailed Description

A base class for abstract read/write access of the MLImageFileFormat.

It can be derived to create a custom file access, e.g., to read data from a database or from the network.

Definition at line 26 of file mlImageFormatFileAccess.h.

Constructor & Destructor Documentation

MLImageFormatAbstractFileHandle()

ml::MLImageFormatAbstractFileHandle::MLImageFormatAbstractFileHandle ( )

inline

Standard constructor.

Definition at line 30 of file mlImageFormatFileAccess.h.

~MLImageFormatAbstractFileHandle()

virtual ml::MLImageFormatAbstractFileHandle::~MLImageFormatAbstractFileHandle ( )

inlinevirtual

Destructor to clean up. Reimplement to close the file.

Definition at line 33 of file mlImageFormatFileAccess.h.

Member Function Documentation

close()

virtual MLErrorCode ml::MLImageFormatAbstractFileHandle::close ( )

pure virtual

Closes the file.

Implemented in ml::MLImageFormatDiskFileHandle.

getFileSize()

virtual MLint64 ml::MLImageFormatAbstractFileHandle::getFileSize ( )

pure virtual

Returns the current complete file size.

Implemented in ml::MLImageFormatDiskFileHandle.

read() [1/2]

MLuint8 * ml::MLImageFormatAbstractFileHandle::read	(	MLuint	startPosition,
		MLuint	numBytes )

Convenience method that reads the given block and returns an array that needs to be freed by free().

Returns NULL if failed.

read() [2/2]

virtual bool ml::MLImageFormatAbstractFileHandle::read ( MLuint8 * data, MLuint startPosition, MLuint numBytes )

pure virtual

Reads the given block and returns true if numBytes have been read.

The data pointer needs to be large enough to hold numBytes bytes.

Implemented in ml::MLImageFormatDiskFileHandle.

write()

virtual MLErrorCode ml::MLImageFormatAbstractFileHandle::write ( MLuint startPos, const MLuint8 * data, size_t length )

pure virtual

Writes the given block.

Implemented in ml::MLImageFormatDiskFileHandle.

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

• MeVis/Foundation/Sources/MLImageFormatBase/mlImageFormatFileAccess.h