public void TestDivide()
{
var fr = new RandomGenerator();
for (var i = 0; i < 500; ++i)
{
ERational er = RandomObjects.RandomERational(fr);
ERational er2 = RandomObjects.RandomERational(fr);
if (er2.IsZero || !er2.IsFinite)
{
continue;
}
if (er.IsZero || !er.IsFinite)
{
continue;
}
ERational ermult = er.Multiply(er2);
ERational erdiv = ermult.Divide(er);
TestCommon.CompareTestEqual(erdiv, er2);
erdiv = ermult.Divide(er2);
TestCommon.CompareTestEqual(erdiv, er);
}
}
public static CBORObject Multiply(CBORObject a, CBORObject b)
{
if (a == null)
{
throw new ArgumentNullException("a");
}
if (b == null)
{
throw new ArgumentNullException("b");
}
if (a.Type != CBORType.Number)
{
throw new ArgumentException("a.Type (" + a.Type +
") is not equal to " + CBORType.Number);
}
if (b.Type != CBORType.Number)
{
throw new ArgumentException("b.Type (" + b.Type +
") is not equal to " + CBORType.Number);
}
object objA = a.ThisItem;
object objB = b.ThisItem;
int typeA = a.ItemType;
int typeB = b.ItemType;
if (typeA == CBORObject.CBORObjectTypeInteger && typeB ==
CBORObject.CBORObjectTypeInteger)
{
var valueA = (long)objA;
var valueB = (long)objB;
bool apos = valueA > 0L;
bool bpos = valueB > 0L;
if (
(apos && ((!bpos && (Int64.MinValue / valueA) > valueB) ||
(bpos && valueA > (Int64.MaxValue / valueB)))) ||
(!apos && ((!bpos && valueA != 0L &&
(Int64.MaxValue / valueA) > valueB) ||
(bpos && valueA < (Int64.MinValue / valueB)))))
{
// would overflow, convert to EInteger
var bvalueA = (EInteger)valueA;
var bvalueB = (EInteger)valueB;
return(CBORObject.FromObject(bvalueA * (EInteger)bvalueB));
}
return(CBORObject.FromObject(valueA * valueB));
}
if (typeA == CBORObject.CBORObjectTypeExtendedRational ||
typeB == CBORObject.CBORObjectTypeExtendedRational)
{
ERational e1 =
CBORObject.GetNumberInterface(typeA).AsExtendedRational(objA);
ERational e2 =
CBORObject.GetNumberInterface(typeB).AsExtendedRational(objB);
return(CBORObject.FromObject(e1.Multiply(e2)));
}
if (typeA == CBORObject.CBORObjectTypeExtendedDecimal ||
typeB == CBORObject.CBORObjectTypeExtendedDecimal)
{
EDecimal e1 =
CBORObject.GetNumberInterface(typeA).AsExtendedDecimal(objA);
EDecimal e2 =
CBORObject.GetNumberInterface(typeB).AsExtendedDecimal(objB);
return(CBORObject.FromObject(e1.Multiply(e2)));
}
if (typeA == CBORObject.CBORObjectTypeExtendedFloat || typeB ==
CBORObject.CBORObjectTypeExtendedFloat ||
typeA == CBORObject.CBORObjectTypeDouble || typeB ==
CBORObject.CBORObjectTypeDouble ||
typeA == CBORObject.CBORObjectTypeSingle || typeB ==
CBORObject.CBORObjectTypeSingle)
{
EFloat e1 =
CBORObject.GetNumberInterface(typeA).AsExtendedFloat(objA);
EFloat e2 = CBORObject.GetNumberInterface(typeB).AsExtendedFloat(objB);
return(CBORObject.FromObject(e1.Multiply(e2)));
}
else
{
EInteger b1 = CBORObject.GetNumberInterface(typeA).AsEInteger(objA);
EInteger b2 = CBORObject.GetNumberInterface(typeB).AsEInteger(objB);
return(CBORObject.FromObject(b1 * (EInteger)b2));
}
}
/// <summary>Returns a CBOR number expressing the product of this
/// number and the given number.</summary>
/// <param name='b'>The second operand to the multiplication
/// operation.</param>
/// <returns>A number expressing the product of this number and the
/// given number.</returns>
/// <exception cref='ArgumentNullException'>The parameter <paramref
/// name='b'/> is null.</exception>
public CBORNumber Multiply(CBORNumber b)
{
if (b == null)
{
throw new ArgumentNullException(nameof(b));
}
CBORNumber a = this;
object objA = a.value;
object objB = b.value;
Kind typeA = a.kind;
Kind typeB = b.kind;
if (typeA == Kind.Integer && typeB == Kind.Integer)
{
var valueA = (long)objA;
var valueB = (long)objB;
bool apos = valueA > 0L;
bool bpos = valueB > 0L;
if (
(apos && ((!bpos && (Int64.MinValue / valueA) > valueB) ||
(bpos && valueA > (Int64.MaxValue / valueB)))) ||
(!apos && ((!bpos && valueA != 0L &&
(Int64.MaxValue / valueA) > valueB) ||
(bpos && valueA < (Int64.MinValue / valueB)))))
{
// would overflow, convert to EInteger
var bvalueA = (EInteger)valueA;
var bvalueB = (EInteger)valueB;
return(CBORNumber.FromObject(bvalueA * (EInteger)bvalueB));
}
return(CBORNumber.FromObject(valueA * valueB));
}
if (typeA == Kind.ERational ||
typeB == Kind.ERational)
{
ERational e1 =
GetNumberInterface(typeA).AsExtendedRational(objA);
ERational e2 = GetNumberInterface(typeB).AsExtendedRational(objB);
return(CBORNumber.FromObject(e1.Multiply(e2)));
}
if (typeA == Kind.EDecimal ||
typeB == Kind.EDecimal)
{
EDecimal e1 =
GetNumberInterface(typeA).AsExtendedDecimal(objA);
EDecimal e2 = GetNumberInterface(typeB).AsExtendedDecimal(objB);
return(CBORNumber.FromObject(e1.Multiply(e2)));
}
if (typeA == Kind.EFloat || typeB ==
Kind.EFloat || typeA == Kind.Double || typeB ==
Kind.Double)
{
EFloat e1 =
GetNumberInterface(typeA).AsExtendedFloat(objA);
EFloat e2 = GetNumberInterface(typeB).AsExtendedFloat(objB);
return(new CBORNumber(Kind.EFloat, e1.Multiply(e2)));
}
else
{
EInteger b1 = GetNumberInterface(typeA).AsEInteger(objA);
EInteger b2 = GetNumberInterface(typeB).AsEInteger(objB);
return(new CBORNumber(Kind.EInteger, b1 * (EInteger)b2));
}
}
