org.spongycastle.pqc.math.linearalgebra

Class IntUtils

java.lang.Object

org.spongycastle.pqc.math.linearalgebra.IntUtils

public final class IntUtils
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static int[]	clone(int[] array) Return a clone of the given int array.
static boolean	equals(int[] left, int[] right) Compare two int arrays.
static void	fill(int[] array, int value) Fill the given int array with the given value.
static void	quicksort(int[] source) Sorts this array of integers according to the Quicksort algorithm.
static void	quicksort(int[] source, int left, int right) Sort a subarray of a source array.
static int[]	subArray(int[] input, int start, int end) Generates a subarray of a given int array.
static java.lang.String	toHexString(int[] input)
static java.lang.String	toString(int[] input)

Methods inherited from class java.lang.Object

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

Method Detail

equals

public static boolean equals(int[] left,
                             int[] right)

Compare two int arrays. No null checks are performed.

Parameters:

left - the first int array

right - the second int array

Returns:

the result of the comparison

clone

public static int[] clone(int[] array)

Return a clone of the given int array. No null checks are performed.

Parameters:

array - the array to clone

Returns:

the clone of the given array

fill

public static void fill(int[] array,
                        int value)

Fill the given int array with the given value.

Parameters:

array - the array

value - the value

quicksort

public static void quicksort(int[] source)

Sorts this array of integers according to the Quicksort algorithm. After calling this method this array is sorted in ascending order with the smallest integer taking position 0 in the array.

This implementation is based on the quicksort algorithm as described in Data Structures In Java by Thomas A. Standish, Chapter 10, ISBN 0-201-30564-X.

Parameters:

source - the array of integers that needs to be sorted.

quicksort

public static void quicksort(int[] source,
                             int left,
                             int right)

Sort a subarray of a source array. The subarray is specified by its start and end index.

Parameters:

source - the int array to be sorted

left - the start index of the subarray

right - the end index of the subarray

subArray

public static int[] subArray(int[] input,
                             int start,
                             int end)

Generates a subarray of a given int array.

Parameters:

input - - the input int array

start - - the start index

end - - the end index

Returns:

a subarray of input, ranging from start to end

toString

public static java.lang.String toString(int[] input)

Parameters:

input - an int array

Returns:

a human readable form of the given int array

toHexString

public static java.lang.String toHexString(int[] input)

Parameters:

input - an int arary

Returns:

the int array as hex string