Constructor Detail

• ZipUtil

  public ZipUtil()

Method Detail

• toDosTime

  public static ZipLong toDosTime(Date time)

  Convert a Date object to a DOS date/time field.

  Parameters:

  time - the Date to convert

  Returns:

  the date as a ZipLong

• toDosTime

  public static byte[] toDosTime(long t)

  Convert a Date object to a DOS date/time field.

  Stolen from InfoZip's fileio.c

  Parameters:

  t - number of milliseconds since the epoch

  Returns:

  the date as a byte array

• toDosTime

  public static void toDosTime(long t,
               byte[] buf,
               int offset)

  Convert a Date object to a DOS date/time field.

  Stolen from InfoZip's fileio.c

  Parameters:

  t - number of milliseconds since the epoch

  buf - the output buffer

  offset - The offset within the output buffer of the first byte to be written. must be non-negative and no larger than buf.length-4

• adjustToLong

  public static long adjustToLong(int i)

  Assumes a negative integer really is a positive integer that has wrapped around and re-creates the original value.

  Parameters:

  i - the value to treat as unsigned int.

  Returns:

  the unsigned int as a long.

• reverse

  public static byte[] reverse(byte[] array)

  Reverses a byte[] array. Reverses in-place (thus provided array is mutated), but also returns same for convenience.

  Parameters:

  array - to reverse (mutated in-place, but also returned for convenience).

  Returns:

  the reversed array (mutated in-place, but also returned for convenience).

  Since:

  1.5

• signedByteToUnsignedInt

  public static int signedByteToUnsignedInt(byte b)

  Converts a signed byte into an unsigned integer representation (e.g., -1 becomes 255).

  Parameters:

  b - byte to convert to int

  Returns:

  int representation of the provided byte

  Since:

  1.5

• unsignedIntToSignedByte

  public static byte unsignedIntToSignedByte(int i)

  Converts an unsigned integer to a signed byte (e.g., 255 becomes -1).

  Parameters:

  i - integer to convert to byte

  Returns:

  byte representation of the provided int

  Throws:

  IllegalArgumentException - if the provided integer is not inside the range [0,255].

  Since:

  1.5

• fromDosTime

  public static Date fromDosTime(ZipLong zipDosTime)

  Convert a DOS date/time field to a Date object.

  Parameters:

  zipDosTime - contains the stored DOS time.

  Returns:

  a Date instance corresponding to the given time.

• dosToJavaTime

  public static long dosToJavaTime(long dosTime)

  Converts DOS time to Java time (number of milliseconds since epoch).

  Parameters:

  dosTime - time to convert

  Returns:

  converted time