org.spongycastle.pqc.math.ntru.polynomial

Class BigDecimalPolynomial

java.lang.Object

org.spongycastle.pqc.math.ntru.polynomial.BigDecimalPolynomial

public class BigDecimalPolynomial
extends java.lang.Object

A polynomial with BigDecimal coefficients. Some methods (like add) change the polynomial, others (like mult) do not but return the result as a new polynomial.

Constructor Summary

Constructors

Constructor and Description
BigDecimalPolynomial(BigIntPolynomial p) Constructs a BigDecimalPolynomial from a BigIntPolynomial.

Method Summary

Modifier and Type	Method and Description
void	add(BigDecimalPolynomial b) Adds another polynomial which can have a different number of coefficients.
java.lang.Object	clone() Makes a copy of the polynomial that is independent of the original.
java.math.BigDecimal[]	getCoeffs()
void	halve() Divides all coefficients by 2.
BigDecimalPolynomial	mult(BigDecimalPolynomial poly2) Multiplies the polynomial by another, taking the indices mod N.
BigDecimalPolynomial	mult(BigIntPolynomial poly2) Multiplies the polynomial by another.
BigIntPolynomial	round() Rounds all coefficients to the nearest integer.

Methods inherited from class java.lang.Object

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

Constructor Detail

BigDecimalPolynomial

public BigDecimalPolynomial(BigIntPolynomial p)

Constructs a BigDecimalPolynomial from a BigIntPolynomial. The two polynomials are independent of each other.

Parameters:

p - the original polynomial

Method Detail

halve

public void halve()

Divides all coefficients by 2.

mult

public BigDecimalPolynomial mult(BigIntPolynomial poly2)

Multiplies the polynomial by another. Does not change this polynomial but returns the result as a new polynomial.

Parameters:

poly2 - the polynomial to multiply by

Returns:

a new polynomial

mult

public BigDecimalPolynomial mult(BigDecimalPolynomial poly2)

Multiplies the polynomial by another, taking the indices mod N. Does not change this polynomial but returns the result as a new polynomial.

Parameters:

poly2 - the polynomial to multiply by

Returns:

a new polynomial

add

public void add(BigDecimalPolynomial b)

Adds another polynomial which can have a different number of coefficients.

Parameters:

b - another polynomial

round

public BigIntPolynomial round()

Rounds all coefficients to the nearest integer.

Returns:

a new polynomial with BigInteger coefficients

clone

public java.lang.Object clone()

Makes a copy of the polynomial that is independent of the original.

Overrides:

clone in class java.lang.Object

getCoeffs

public java.math.BigDecimal[] getCoeffs()