/// <summary>
/// 指定された値を指数として Rational 値を累乗します。
/// </summary>
/// <param name="ebase">累乗対象の Rational。</param>
/// <param name="exponent">累乗の指数を指定する Rational。</param>
private static Rational Pow(Rational ebase, BigUInteger exponent)
{
if (exponent.IsZero)
{
return(Rational.One);
}
else if (exponent.IsOne)
{
return(ebase);
}
var resultBase = Rational.One;
while (exponent > BigUInteger.One)
{
if (!exponent.IsEven)
{
resultBase *= ebase;
}
ebase *= ebase;
exponent = BigUInteger.RightShift(exponent, 0, 1);
}
return(resultBase * ebase);
}
private static Rational UnderflowTrimer(Rational value, Rational targetOder)
{
var nowOder = GetOrder(value.Denominator) - targetOder;
if (nowOder > 0)
{
var(arrayShift, innerShift) = Math.DivRem(nowOder, BigUInteger.ContainerItemSizeWithBit);
value.Numerator = BigUInteger.RightShift(value.Numerator, (int)arrayShift, (int)innerShift);
value.Denominator = BigUInteger.RightShift(value.Denominator, (int)arrayShift, (int)innerShift);
}
return(value);
}
/// <summary>
/// 指定の数値を指定した値で累乗した値を返します。
/// </summary>
/// <param name="ebase">累乗対象の BigUInteger。</param>
/// <param name="exponent">累乗を指定する BigUInteger。</param>
/// <returns>数値 ebase を exponent で累乗した値。</returns>
public static BigUInteger Pow(BigUInteger ebase, BigUInteger exponent)
{
#if DEBUG && !DLLDEBUG
return(System.Math.Pow(ebase.Value, exponent.Value));
#else
if (ebase.IsOne || exponent.IsOne)
{
//x=1; 1
return(ebase);
}
if (exponent == 0)
{
return(BigUInteger.One);
}
if (ebase.IsZero)
{
//x=0; y>0. 0
return(BigUInteger.Zero);
}
if (exponent.IsZero)
{
return(BigUInteger.One);
}
if (exponent.IsZero)
{
return(BigUInteger.One);
}
else if (exponent.IsOne)
{
return(ebase);
}
var resultBase = BigUInteger.One;
while (exponent > BigUInteger.One)
{
if (!exponent.IsEven)
{
resultBase *= ebase;
}
ebase *= ebase;
exponent = BigUInteger.RightShift(exponent, 0, 1);
}
return(resultBase * ebase);
#endif
}
public void Plus()
{
ExecTest(BigUInteger.RightShift(new BigUInteger(new byte[] { 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0 }), 32), new byte[] { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0 });
}