private byte readByte ( ) throws IOException { if ( buffer . size ( ) > position ) { byte b = buffer . getByte ( position ) ; position ++ ; return b ; } else { nextBuffer ( ) ; if ( buffer . size ( ) > 0 ) { byte b = buffer . getByte ( 0 ) ; position = 1 ; return b ; } return readByte ( ) ; } }
Read a byte value at the cursor and proceed the cursor .