QByteArray in Qt3

[joseph]

Hello All,
I have a code snippet written in Qt4. I want to port the following code to Qt3. I have given my attempt but the data what I get is "not complete". Since the data is binary, I assume a NULL character is encountered and terminates to read further.

Qt4 code

QFile fRead(inputFileName);
if (!fRead.open(QIODevice::ReadOnly))
   return;
 
QByteArray message = fRead.readAll();	
fRead.close();
 
QByteArray left16 = message.left( 16 );     //get first 16 bytes
QByteArray restRightAfter16 = message.right( message.length() - 16 );

QFile fRead(inputFileName);
if (!fRead.open(QIODevice::ReadOnly))
   return;

QByteArray message = fRead.readAll();	
fRead.close();
	
QByteArray left16 = message.left( 16 );     //get first 16 bytes
QByteArray restRightAfter16 = message.right( message.length() - 16 );

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Qt3 code

QFile fRead(inputFileName);
if (!fRead.open(IO_ReadOnly))
   return;
 
QByteArray message = fRead.readAll();	 
fRead.close();
 
QCString strleft16 = QCString( message.data() );     
QByteArray left16 = strSalt.left( 16 ); 
 
QCString strRestRightAfter16  = QCString( message.data() );
QByteArray restRightAfter16  = strRestRightAfter16.right( strBody.length() - 16 ); //I dont the full data into restRightAfter16. The data is incomplete.

QFile fRead(inputFileName);
if (!fRead.open(IO_ReadOnly))
   return;

QByteArray message = fRead.readAll();	 
fRead.close();

QCString strleft16 = QCString( message.data() );     
QByteArray left16 = strSalt.left( 16 ); 

QCString strRestRightAfter16  = QCString( message.data() );
QByteArray restRightAfter16  = strRestRightAfter16.right( strBody.length() - 16 ); //I dont the full data into restRightAfter16. The data is incomplete.

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The binary file is really large and I want to read the entire data as given in the code above. I dont have any problems with Qt4 code and it works very fine.
Where I'm I going wrong?

Thanks

[null_pointer]

Use QDataStream class.

The QDataStream class provides serialization of binary data to a QIODevice.

The QDataStream class provides serialization of binary data to a QIODevice.

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Example from Qt3 docs:

QFile file( "file.dat" );
file.open( IO_ReadOnly );
QDataStream stream( &file );  // read the data serialized from the file
QString str;
Q_INT32 a;
stream >> str >> a;           // extract "the answer is" and 42

QFile file( "file.dat" );
file.open( IO_ReadOnly );
QDataStream stream( &file );  // read the data serialized from the file
QString str;
Q_INT32 a;
stream >> str >> a;           // extract "the answer is" and 42

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