RFile Read Problem

[pornima]

Hi All,

1. I want to read given number of bytes form file.
2. I wnat number of bytes actually read.

my code is

      TBuf8 <50> szDataRead;
	
	TBuf <MAX_PATH> szFilePath;
	_LIT(KFILE, "C:\\a.txt");
	
	szFilePath.Copy(KFILE);
	
	//
	//	Connect file session.
	//	
	User::LeaveIfError(fsSession.Connect());
	
	//
	//	Constructs & pushes object onto cleanup stack.
	//
	CleanupClosePushL(fsSession);	
	
	//
	//	Open file.
	//
	iRetVal = rfile.Open(fsSession, szFilePath, EFileRead);
	if (KErrNone != iRetVal)
	{
		CleanupStack::PopAndDestroy(1); // fsSession
		
		return;
	}
	
	
	CleanupClosePushL(rfile);
	TInt iRead = 10;
	iRetVal = rfile.Read(szDataRead, iRead);
	if (KErrNone != iRetVal )
	{
		CleanupStack::PopAndDestroy(2);	//	rFileScanchk, fsSession
		return;	
	}

if file a.txt is empty, still Read returns KErrNone and iRead contains value 10. so is it neccessary to check file size before any file operation? Read call not take care for this?how to get number of bytes actually read from file?


Thanks & Regards,
sheetal.

[vineet.jain]

have you seen this function in sdk:

TInt Read(TInt aPos, TDes8 &aDes, TInt aLength) const;

it reads, from a particular position, in a desciptor you define, and the length to read,in your case its 10

[assayag]

Hi,
Put:
iRetVal = rfile.Read(szDataRead);
Then check: szDataRead.Length() is the number of bytes you need.

Regards
Assayag

[pornima]

Hi,
Put:
iRetVal = rfile.Read(szDataRead);
Then check: szDataRead.Length() is the number of bytes you need.

Regards
Assayag

thanks.. i get it..