ucar.unidata.io

Class Swap

java.lang.Object

ucar.unidata.io.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 and Description
Swap()

Method Summary

Modifier and Type	Method and 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.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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