Added helper function to read the file header into cached location
Added helper function to read the file header into cached location

arvidtp/jdksavdecc-c,arvidtp/jdksavdecc-c,jdkoftinoff/jdksavdecc-c,jdkoftinoff/jdksavdecc-mcu,jdkoftinoff/jdksavdecc-c,jdkoftinoff/jdksavdecc-c,arvidtp/jdksavdecc-c,jdkoftinoff/jdksavdecc-c,jdkoftinoff/jdksavdecc-mcu,arvidtp/jdksavdecc-c,jdkoftinoff/jdksavdecc-mcu,jdkoftinoff/jdksavdecc-mcu