FStreamSizeHolder Declaration remembers size of stream chunk for backward compatibility. More...

#include <fstreamer.h>

Public Member Functions
	FStreamSizeHolder (FStreamer &s)

void	beginWrite ()
	remembers position and writes 0

int32	endWrite ()
	writes and returns size (since the start marker)

int32	beginRead ()
	returns size

void	endRead ()
	jump to end of chunk

Protected Attributes
FStreamer &	stream

int64	sizePos

Detailed Description

FStreamSizeHolder Declaration remembers size of stream chunk for backward compatibility.

Example:

externalize (a)
{
    FStreamSizeHolder sizeHolder;
    sizeHolder.beginWrite ();   // sets start mark, writes dummy size
    a << ....
    sizeHolder.endWrite ();     // jumps to start mark, updates size, jumps back here
}
 
internalize (a)
{
    FStreamSizeHolder sizeHolder;
    sizeHolder.beginRead ();    // reads size, mark
    a >> ....
    sizeHolder.endRead ();      // jumps forward if new version has larger size
}

Constructor & Destructor Documentation

◆ FStreamSizeHolder()

FStreamSizeHolder ( FStreamer & s )

Member Function Documentation

◆ beginWrite()

void beginWrite ( )

remembers position and writes 0

◆ endWrite()

int32 endWrite ( )

writes and returns size (since the start marker)

◆ beginRead()

int32 beginRead ( )

returns size

◆ endRead()

void endRead ( )

jump to end of chunk

Member Data Documentation

◆ stream

FStreamer& stream

protected

◆ sizePos

int64 sizePos