[SOLVED] QByteArray append data in loop "wrong" end size

[Talei]

Hello,
I have problem with appending dato into QByteArray from another QByteArray.
What I want to do is do decompress file, zlib, but in my Decompress() function I can only decompress as much as bufferSize (int) data, so I need to divide my compressed size into smaller chunks, not greater then bufferSize.
I do this as fallows, and I know that probably I should use QDataStram, but for the simplicity sake I use QByteArray.

while( !ba.isEmpty() ){
 
                QByteArray tmp = ba.left( 262144 );
 
                if( ba.size() <= 262144 ){
                    ba.remove( 0, ba.size() );
                }else{
                    ba.remove( 0, 262144 );
                }
 
                baUncompre.append( Decompress( tmp ) );
 
            }

while( !ba.isEmpty() ){

                QByteArray tmp = ba.left( 262144 );

                if( ba.size() <= 262144 ){
                    ba.remove( 0, ba.size() );
                }else{
                    ba.remove( 0, 262144 );
                }

                baUncompre.append( Decompress( tmp ) );

            }

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Then I write baUncompre to hdd.
The problem is that baUncompre have wrong size. I know that Decompress() works fine.
I tried baUncompre .resize( (int)uncompressedSize ); but that resize QBA not to the unompressed size but uncompressedSize +some more.

Can someone shed some light where is error in my thinking.

Best regards.

EDIT: I checked and loop is fine, error is that append appends more then decompressed size or lees (depends if I resize baUncompre or not).

EDIT: Sorry for garbage post, error was in Decompress() function.