Package com.github.toolarium.common.util

Class ByteUtil

java.lang.Object

com.github.toolarium.common.util.ByteUtil

public final class ByteUtil
extends Object

Byte utitlity.

Method Summary

Modifier and Type	Method	Description
void	copyBlock(byte[] src, byte[] dst)	Copies one byte block to another.
void	copyBlock(byte[] src, int srcOff, byte[] dst, int dstOff, int len)	Copies the specified byte sequence of the given source array to the specified destination array.
void	copyBlock(int[] src, int[] dst)	Copies one int block to another.
void	copyBlock(int[] src, int srcOff, int[] dst, int dstOff, int len)	Copies the specified int sequence of the given source array to the specified destination array.
boolean	equalsBlock(byte[] a, byte[] b)	Check two blocks for equality.
boolean	equalsBlock(byte[] dataA, int offsetDataA, byte[] dataB, int offsetDataB, int len)	Check two blocks for equality.
static ByteUtil	getInstance()	Get the instance
int	indexOf(byte[] source, int sourceOffset, int sourceCount, byte[] target, int targetOffset, int targetCount, int index)	The source is the byte array being searched, and the target is the string being searched for.
int	toByte(char c, int radix)	Convert the given char to an int.
byte[]	toByteArray(String s)	Convert the given string with hex values to a byte array.
byte[]	toBytes(byte[] src, int len)	Prepare a byte array to a byte array of a defined size
byte[]	toBytes(int inputSrc)	Convert an integer value to a 4 byte array
byte[]	toBytes(long src)	Convert from a long value to a 8 byte array
int	toInteger(byte[] src)	Build an integer from first 4 bytes of the array.
int	toInteger(ByteArray src)	Build an integer from first 4 bytes of the array.
long	toLong(byte[] src)	Build a long from first 8 bytes of the array.
long	toLong(ByteArray src)	Build a long from first 8 bytes of the array.

Methods inherited from class java.lang.Object

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

Method Details

getInstance

public static ByteUtil getInstance()

Get the instance

Returns:

the instance

equalsBlock

public boolean equalsBlock(byte[] dataA,
 int offsetDataA,
 byte[] dataB,
 int offsetDataB,
 int len)

Check two blocks for equality. The specified sub blocks of the given byte arrays are checked for equality.

Parameters:

dataA - the first byte array to be compared

offsetDataA - the offset indicating the start position of the sub-block of a

dataB - the second byte array to be compared

offsetDataB - the offset indicating the start position of the sub-block of b

len - the number of bytes to be compared

Returns:

true, if the two sub-blocks are equal, false otherwise

equalsBlock

public boolean equalsBlock(byte[] a,
 byte[] b)

Check two blocks for equality.

Parameters:

a - the first byte array to be compared

b - the second byte array to be compared

Returns:

true, if the two blocks are equal, false otherwise

toByteArray

public byte[] toByteArray(String s)

Convert the given string with hex values to a byte array. For example "001122" is turned into {0, 0x11, 0x22}. All characters outside the range of '0'-'9', 'a'-'z', and 'A'-'Z' or simply ignored.

Parameters:

s - the string to convert

Returns:

the byte array

toByte

public int toByte(char c,
 int radix)

Convert the given char to an int. '0' maps to 0, 'a' and 'A' to 10, 'z' and 'Z' to 36, and so on. For all other characters and for resulting values equal to or larger than radix -1 is returned.

Parameters:

c - the string to convert

radix - the radix

Returns:

the converted byte

copyBlock

public void copyBlock(byte[] src,
 int srcOff,
 byte[] dst,
 int dstOff,
 int len)

Copies the specified byte sequence of the given source array to the specified destination array. Beginning at the specified srcOff position, len bytes of the source array are copied to the given destination array, starting at dstOff.

Parameters:

src - the source byte array

srcOff - the offset indicating the start position within the first byte array; the following len bytes will be copied to the destination array

dst - the destination array to which to copy the bytes

dstOff - the offset indicating the start position within the destination byte array, to which the bytes shall be copied

len - the number of bytes to be copied

copyBlock

public void copyBlock(byte[] src,
 byte[] dst)

Copies one byte block to another.

Parameters:

src - the source byte array

dst - the destination array to which to copy the bytes

copyBlock

public void copyBlock(int[] src,
 int srcOff,
 int[] dst,
 int dstOff,
 int len)

Copies the specified int sequence of the given source array to the specified destination array. Beginning at the specified srcOff position, len ints of the source array are copied to the given destination array, starting at dstOff.

Parameters:

src - the source int array

srcOff - the offset indicating the start position within the first int array; the following len ints will be copied to the destination array

dst - the destination array to which to copy the ints

dstOff - the offset indicating the start position within the destination int array, to which the ints shall be copied

len - the number of ints to be copied

copyBlock

public void copyBlock(int[] src,
 int[] dst)

Copies one int block to another.

Parameters:

src - the source int array

dst - the destination array to which to copy the ints

toBytes

public byte[] toBytes(int inputSrc)

Convert an integer value to a 4 byte array

Parameters:

inputSrc - the array to convert (must be of size 4)

Returns:

the converted byte array

toBytes

public byte[] toBytes(long src)

Convert from a long value to a 8 byte array

Parameters:

src - the array to convert (must be of size 8)

Returns:

the converted byte array

toBytes

public byte[] toBytes(byte[] src,
 int len)

Prepare a byte array to a byte array of a defined size

Parameters:

src - the array to prepare

len - the size of the returned byte array

Returns:

the prepared byte array with the defined size

toInteger

public int toInteger(ByteArray src)

Build an integer from first 4 bytes of the array.

Parameters:

src - The byte[] to convert.

Returns:

the integer value.

toInteger

public int toInteger(byte[] src)

Build an integer from first 4 bytes of the array.

Parameters:

src - The byte[] to convert.

Returns:

the integer value.

toLong

public long toLong(byte[] src)

Build a long from first 8 bytes of the array.

Parameters:

src - The byte[] to convert.

Returns:

the long value.

toLong

public long toLong(ByteArray src)

Build a long from first 8 bytes of the array.

Parameters:

src - The byte[] to convert.

Returns:

the long value.

indexOf

public int indexOf(byte[] source,
 int sourceOffset,
 int sourceCount,
 byte[] target,
 int targetOffset,
 int targetCount,
 int index)

The source is the byte array being searched, and the target is the string being searched for.

Parameters:

source - the bytes being searched.

sourceOffset - offset of the source array.

sourceCount - count of the source array.

target - the bytes being searched for.

targetOffset - offset of the target array.

targetCount - count of the target array.

index - the index to begin searching from.

Returns:

the index within this array of the first occurrence of the specified sub array, starting at the specified index.