reads the fileheader . concode_field_sep UInt dataGroupCnt concode_elem_sep FileHeader header concode_elem_sep UInt firstDataGroupFilePos concode_elem_sep FileInputStream fileStream concode_field_sep void readVersion concode_elem_sep UInt getDataGroupCnt concode_elem_sep void readMagicNumber concode_elem_sep void readDataGroupCnt concode_elem_sep void readFirstDataGroupFilePos concode_elem_sep UInt getFirstDataGroupFilePos concode_elem_sep void readGenericDataHdr
void function ( ) { readMagicNumber ( ) ; readVersion ( ) ; readDataGroupCnt ( ) ; readFirstDataGroupFilePos ( ) ; readGenericDataHdr ( ) ; }