Package de.mhus.lib.core

Class MMath

java.lang.Object

de.mhus.lib.core.MMath

public class MMath
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static int	ROTATE_LEFT
static int	ROTATE_RIGHT

Constructor Summary

Constructors

Constructor	Description
MMath()

Method Summary

Modifier and Type	Method	Description
static byte	addRotate(byte b, byte add)
static long	pow(long a, int b)
static byte	rotl(byte data, int distance)
static int	rotl(int data, int distance)
static byte	rotr(byte data, int distance)
static int	rotr(int data, int distance)
static byte	subRotate(byte b, byte add)
static String	toBasis36(long value, int digits)	Pack the number in a base 36 numerical system.
static String	toBasis36WithIdent(long value, long ident, int digits)	Pack the number in a base 36 numerical system.
static double	truncateDecimals(double d, int len)
static int	unsignetByteToInt(byte b)

Methods inherited from class java.lang.Object

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

Field Detail

ROTATE_LEFT

public static final int ROTATE_LEFT

See Also:

Constant Field Values

ROTATE_RIGHT

public static final int ROTATE_RIGHT

See Also:

Constant Field Values

Constructor Detail

MMath

public MMath()

Method Detail

toBasis36

public static String toBasis36(long value,
                               int digits)

Pack the number in a base 36 numerical system. This means the characters 0-9 A-Z are used. This is the maximum packed system if you want to use case insensitive strings.

Parameters:

value - The value to convert

digits - number of minimum digits (expect the minus character if the value is negative)

Returns:

encoded string

toBasis36WithIdent

public static String toBasis36WithIdent(long value,
                                        long ident,
                                        int digits)

Pack the number in a base 36 numerical system. This means the characters 0-9 A-Z are used. This is the maximum packed system if you want to use case insensitive strings. This function creates ids specially for logger traces.

Parameters:

value - The value to convert

ident - additional ident at the right side, has 4 digits

digits - number of minimum digits (expect the minus character if the value is negative)

Returns:

encoded string

truncateDecimals

public static double truncateDecimals(double d,
                                      int len)

pow

public static long pow(long a,
                       int b)

unsignetByteToInt

public static int unsignetByteToInt(byte b)

rotr

public static int rotr(int data,
                       int distance)

rotl

public static int rotl(int data,
                       int distance)

rotr

public static byte rotr(byte data,
                        int distance)

rotl

public static byte rotl(byte data,
                        int distance)

addRotate

public static byte addRotate(byte b,
                             byte add)

subRotate

public static byte subRotate(byte b,
                             byte add)