Package ucar.nc2.ui.gis.shapefile

Class Swap

  • public class Swap
extends Object
    The Swap class provides static methods for swapping the bytes of chars, shorts, ints, longs, floats, and doubles.

    • Constructor Summary

      Constructors 
      Constructor Description
      Swap()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static byte[] intToBytes​(int v)
      Convert an int to an array of 4 bytes.
      static byte[] longToBytes​(long v)
      Convert a long to an array of 8 bytes.
      static byte[] shortToBytes​(short v)
      Convert a short to an array of 2 bytes.
      static char swapChar​(byte[] b, int offset)
      Returns the char resulting from swapping 2 bytes at a specified offset in a byte array.
      static double swapDouble​(byte[] b, int offset)
      Returns the double resulting from reversing 8 bytes at a specified offset in a byte array.
      static double swapDouble​(double v)
      Returns the double resulting from reversing 8 bytes of a specified double.
      static float swapFloat​(byte[] b, int offset)
      Returns the float resulting from reversing 4 bytes at a specified offset in a byte array.
      static float swapFloat​(float v)
      Returns the float resulting from reversing 4 bytes of a specified float.
      static int swapInt​(byte[] b, int offset)
      Returns the int resulting from reversing 4 bytes at a specified offset in a byte array.
      static int swapInt​(int v)
      Returns the int resulting from reversing 4 bytes of a specified int.
      static long swapLong​(byte[] b, int offset)
      Returns the long resulting from reversing 8 bytes at a specified offset in a byte array.
      static long swapLong​(long l)
      Returns the long resulting from reversing 8 bytes of a specified long.
      static short swapShort​(byte[] b, int offset)
      Returns the short resulting from swapping 2 bytes at a specified offset in a byte array.
      static short swapShort​(short s)
      Returns the short resulting from swapping 2 bytes of a specified short.

    • Constructor Detail

      • Swap

        public Swap()

    • Method Detail

      • swapShort

        public static short swapShort​(byte[] b,
                              int offset)
        Returns the short resulting from swapping 2 bytes at a specified offset in a byte array.
        Parameters:
        b - the byte array
        offset - the offset of the first byte
        Returns:
        the short represented by the bytes b[offset+1], b[offset]

      • swapInt

        public static int swapInt​(byte[] b,
                          int offset)
        Returns the int resulting from reversing 4 bytes at a specified offset in a byte array.
        Parameters:
        b - the byte array
        offset - the offset of the first byte
        Returns:
        the int represented by the bytes b[offset+3], b[offset+2], ..., b[offset]

      • swapLong

        public static long swapLong​(byte[] b,
                            int offset)
        Returns the long resulting from reversing 8 bytes at a specified offset in a byte array.
        Parameters:
        b - the byte array
        offset - the offset of the first byte
        Returns:
        the long represented by the bytes b[offset+7], b[offset+6], ..., b[offset]

      • swapFloat

        public static float swapFloat​(byte[] b,
                              int offset)
        Returns the float resulting from reversing 4 bytes at a specified offset in a byte array.
        Parameters:
        b - the byte array
        offset - the offset of the first byte
        Returns:
        the float represented by the bytes b[offset+3], b[offset+2], ..., b[offset]

      • swapDouble

        public static double swapDouble​(byte[] b,
                                int offset)
        Returns the double resulting from reversing 8 bytes at a specified offset in a byte array.
        Parameters:
        b - the byte array
        offset - the offset of the first byte
        Returns:
        the double represented by the bytes b[offset+7], b[offset+6], ..., b[offset]

      • swapChar

        public static char swapChar​(byte[] b,
                            int offset)
        Returns the char resulting from swapping 2 bytes at a specified offset in a byte array.
        Parameters:
        b - the byte array
        offset - the offset of the first byte
        Returns:
        the char represented by the bytes b[offset+1], b[offset]

      • swapShort

        public static short swapShort​(short s)
        Returns the short resulting from swapping 2 bytes of a specified short.
        Parameters:
        s - input value for which byte reversal is desired
        Returns:
        the value represented by the bytes of s reversed

      • swapInt

        public static int swapInt​(int v)
        Returns the int resulting from reversing 4 bytes of a specified int.
        Parameters:
        v - input value for which byte reversal is desired
        Returns:
        the value represented by the bytes of v reversed

      • swapLong

        public static long swapLong​(long l)
        Returns the long resulting from reversing 8 bytes of a specified long.
        Parameters:
        l - input value for which byte reversal is desired
        Returns:
        the value represented by the bytes of l reversed

      • swapFloat

        public static float swapFloat​(float v)
        Returns the float resulting from reversing 4 bytes of a specified float.
        Parameters:
        v - input value for which byte reversal is desired
        Returns:
        the value represented by the bytes of v reversed

      • swapDouble

        public static double swapDouble​(double v)
        Returns the double resulting from reversing 8 bytes of a specified double.
        Parameters:
        v - input value for which byte reversal is desired
        Returns:
        the value represented by the bytes of v reversed

      • shortToBytes

        public static byte[] shortToBytes​(short v)
        Convert a short to an array of 2 bytes.
        Parameters:
        v - input value
        Returns:
        the corresponding array of bytes

      • intToBytes

        public static byte[] intToBytes​(int v)
        Convert an int to an array of 4 bytes.
        Parameters:
        v - input value
        Returns:
        the corresponding array of bytes

      • longToBytes

        public static byte[] longToBytes​(long v)
        Convert a long to an array of 8 bytes.
        Parameters:
        v - input value
        Returns:
        the corresponding array of bytes