MemIOCallback Class Reference

Inheritance diagram for MemIOCallback:

Collaboration diagram for MemIOCallback:

Public Member Functions
	MemIOCallback (uint64 DefaultSize=128)
uint32	read (void *Buffer, size_t Size)
void	setFilePointer (int64 Offset, seek_mode Mode=seek_beginning)
size_t	write (const void *Buffer, size_t Size)
virtual uint64	getFilePointer ()
void	close ()
binary *	GetDataBuffer () const
uint64	GetDataBufferSize ()
void	SetDataBufferSize (uint64 newDataBufferSize)
uint32	write (IOCallback &IOToRead, size_t Size)
bool	IsOk ()
const std::string &	GetLastErrorStr ()
Protected Attributes
bool	mOk
std::string	mLastErrorStr
binary *	dataBuffer
uint64	dataBufferPos
uint64	dataBufferTotalSize
uint64	dataBufferMemorySize

Member Function Documentation

void MemIOCallback::close ( ) [inline, virtual]

The close callback flushes the file buffers to disk and closes the file. When using the stdio library, this is equivalent to calling fclose. When the close is not successful, an exception should be thrown.

Implements IOCallback.

virtual uint64 MemIOCallback::getFilePointer ( ) [inline, virtual]

Although the position is always positive, the return value of this callback is signed to easily allow negative values for returning errors. When an error occurs, the implementor should return -1 and the file pointer otherwise.

If an error occurs, an exception should be thrown.

Implements IOCallback.

uint32 MemIOCallback::read	(	void *	Buffer,
		size_t	Size
	)			`[virtual]`

Use this to copy some data to the Buffer from this classes data

Implements IOCallback.

void MemIOCallback::setFilePointer	(	int64	Offset,
		seek_mode	Mode = `seek_beginning`
	)			`[virtual]`

Seek to the specified position. The mode can have either SEEK_SET, SEEK_CUR or SEEK_END. The callback should return true(1) if the seek operation succeeded or false (0), when the seek fails.

Implements IOCallback.