Method computeDOSDateTime

classpath/java/util/zip/ZipEntry.java:140–183

Method computeDOSDateTime(): Takes the time from a long and converts to a Calendar object Time is stored in the MSDOS format 5 bits for hour, 6 bits for min, 5 bits for seconds Hours are in military time and must be adjusted to time zone Seconds are divided by two before storing and must be multip

(long currentTime)

   * @author Aaron Davis
   **/
  private static int computeDOSDateTime(long currentTime){
	  final int DAY_OF_MONTH = 5;
	  final int HOUR_OF_DAY = 11;
	  final int MINUTE = 12;
	  final int MONTH = 2;
	  final int SECOND = 13;
	  final int YEAR = 1;

    //Create calendar object, then set time to value passed in
	  Calendar modCalendar = Calendar.getInstance();
    modCalendar.setTime(new Date(currentTime));

	  //Hour
	  int timeBits = modCalendar.get(HOUR_OF_DAY);
    timeBits = timeBits - 6;
	  timeBits = timeBits << 6;
	  
	  //Minutes
	  int minBits = 0x3f & (modCalendar.get(MINUTE));;
	  timeBits = timeBits ^ minBits;
	  timeBits = timeBits << 5;
	  
	  //Seconds
	  int secBits = 0x1f & (modCalendar.get(SECOND));
	  secBits = secBits >> 1;                  //Divide by 2
	  timeBits = timeBits ^ secBits;
	  
	  //Year
	  int dateBits = (modCalendar.get(YEAR) -1980);
	  dateBits = dateBits << 4;

	  //Month
    int month = 0xf & ((modCalendar.get(MONTH)) + 1);
	  dateBits = dateBits ^ month;
	  dateBits = dateBits << 5;
	  
	  //Day of month
	  int dayBits = 0x1f & modCalendar.get(DAY_OF_MONTH);
	  dateBits = dateBits ^ dayBits;
	  
	  //Store Date
    int storeDate = ((dateBits << 16) ^ (timeBits));
    return storeDate;
  }

  //Methods to set and get the uncompressed size of the entry
  public void setSize(int size){