internal static Point LayoutRound(Point point, RoundingMode roundingMode)
{
point.X = LayoutUtils.RoundX(point.X, roundingMode);
point.Y = LayoutUtils.RoundY(point.Y, roundingMode);
return(point);
}
public static RoundingStrategy GetRoundingStrategy(RoundingMode roundingMode)
{
switch (roundingMode)
{
case RoundingMode.HalfAwayFromZero:
{
return(new HalfAwayFromZero());
}
case RoundingMode.HalfToEven:
{
return(new HalfToEven());
}
case RoundingMode.HalfToOdd:
{
return(new HalfToOdd());
}
case RoundingMode.HalfTowardZero:
{
return(new HalfTowardZero());
}
}
throw new NotImplementedException();
}
internal static double Round(double value, int digits, RoundingMode mode)
{
if (Math.Abs(value) < DoubleRoundLimit == false)
{
return(value);
}
if (mode == RoundingMode.MidPointToEven)
{
return(Math.Round(value, digits, MidpointRounding.ToEven));
}
var power10 = RoundPower10Double[digits];
value *= power10;
var fractional = SplitFractional(ref value);
if (mode == RoundingMode.ToZero)
{
return(value / power10);
}
if (mode == RoundingMode.FromZero || Math.Abs(fractional) >= 0.5)
{
value += Math.Sign(fractional);
}
value /= power10;
return(value);
}
private static int getangle(float angle, int quad, int dist, RoundingMode rmode, int tsize)
{
int tgtPoint = tsize * dist;
double unrounded = 0;
if (quad == 0 || quad == 7 || quad == 3 || quad == 4)
{
unrounded = (double)tgtPoint * Math.Tan(angle);
}
else
{
unrounded = (double)tgtPoint / Math.Tan(angle);
}
switch (rmode)
{
case RoundingMode.Up:
return((int)Math.Ceiling(unrounded / (double)tsize));
case RoundingMode.Down:
return((int)Math.Floor(unrounded / (double)tsize));
case RoundingMode.Nearest:
default:
return((int)Math.Round(unrounded / (double)tsize));
}
}
public RationalHandle Round(RationalHandle u, int decimals, RoundingMode mode)
{
var native_mode = (Int32)mode;
HandleResultCode((PMC_STATUS_CODE)PMCCS_Round_R_I(u.NativeHandle, decimals, native_mode, out IntPtr w));
return(new RationalHandle(w));
}
public BigIntHandle Round(RationalHandle u, RoundingMode mode)
{
var native_mode = (Int32)mode;
HandleResultCode((PMC_STATUS_CODE)PMCCS_Round_R(u.NativeHandle, native_mode, out IntPtr w));
return(new BigIntHandle(w));
}
public static BigDecimal Scale(BigDecimal number, int newScale, RoundingMode roundingMode)
{
long diffScale = newScale - (long)number.Scale;
// Let be: 'number' = [u,s]
if (diffScale == 0)
{
return(number);
}
if (diffScale > 0)
{
// return [u * 10^(s2 - s), newScale]
if (diffScale < BigDecimal.LongTenPow.Length &&
(number.BitLength + BigDecimal.LongTenPowBitLength[(int)diffScale]) < 64)
{
return(BigDecimal.Create(number.SmallValue * BigDecimal.LongTenPow[(int)diffScale], newScale));
}
return(new BigDecimal(Multiplication.MultiplyByTenPow(number.UnscaledValue, (int)diffScale), newScale));
}
// diffScale < 0
// return [u,s] / [1,newScale] with the appropriate scale and rounding
if (number.BitLength < 64 && -diffScale < BigDecimal.LongTenPow.Length)
{
return(DividePrimitiveLongs(number.SmallValue, BigDecimal.LongTenPow[(int)-diffScale], newScale, roundingMode));
}
return(DivideBigIntegers(number.UnscaledValue, Multiplication.PowerOf10(-diffScale), newScale, roundingMode));
}
public static int ordinal(RoundingMode mode)
{
switch (mode)
{
case RoundingMode.UP:
return(0);
case RoundingMode.DOWN:
return(1);
case RoundingMode.CEILING:
return(2);
case RoundingMode.FLOOR:
return(3);
case RoundingMode.HALF_UP:
return(4);
case RoundingMode.HALF_DOWN:
return(5);
case RoundingMode.HALF_EVEN:
return(6);
case RoundingMode.UNNECESSARY:
return(7);
default:
throw new System.ArgumentException("Invalid rounding mode");
}
}
internal static Point Round(Point point, RoundingMode roundingMode, int digits = 0)
{
point.X = Math.Round(point.X, digits);
point.Y = Math.Round(point.Y, digits);
return(point);
}
public static decimal Round(decimal value, int decimalPlaces, RoundingMode mode)
{
// Rounding modes defined in IEEE 754. Unsurprisingly, .NET provides native support for them.
switch (mode)
{
case RoundingMode.Down: return(Down(value, decimalPlaces));
case RoundingMode.Up: return(Up(value, decimalPlaces));
case RoundingMode.TowardsZero: return(TowardsZero(value, decimalPlaces));
case RoundingMode.HalfAwayFromZero: return(HalfAwayFromZero(value, decimalPlaces));
case RoundingMode.ToEven: return(ToEven(value, decimalPlaces));
}
// Rounding modes not part of IEEE 754.
switch (mode)
{
case RoundingMode.AwayFromZero: return(AwayFromZero(value, decimalPlaces));
case RoundingMode.HalfDown: return(HalfDown(value, decimalPlaces));
case RoundingMode.HalfUp: return(HalfUp(value, decimalPlaces));
case RoundingMode.HalfTowardsZero: return(HalfTowardsZero(value, decimalPlaces));
case RoundingMode.ToOdd: return(ToOdd(value, decimalPlaces));
default: throw new ControlFlowException();
}
}
public void Round_no_arguments_using_Money_defaults(RoundingMode roundingMode, DecimalPlaces decimalPlaces, decimal value, decimal expected)
{
Money money = new Money("ZAR", value, roundingMode, decimalPlaces);
Money actual = money.Round();
Assert.That(actual.Amount == expected);
}
public static CartDraft DefaultCartDraftWithTaxRoundingMode(CartDraft draft, RoundingMode roundingMode)
{
var cartDraft = DefaultCartDraft(draft);
cartDraft.TaxRoundingMode = roundingMode;
return(cartDraft);
}
internal static Size Round(Size size, RoundingMode roundingMode, int digits = 0)
{
var width = DoubleUtils.Round(size.Width, digits, roundingMode);
var height = DoubleUtils.Round(size.Height, digits, roundingMode);
return(new Size(width, height));
}
public Money(Currency currency, decimal amount, RoundingMode roundingMode, DecimalPlaces decimalPlaces)
{
Currency = currency;
Amount = amount;
RoundingMode = roundingMode;
DecimalPlaces = (int)decimalPlaces;
}
public BigFloat Divide(BigFloat divisor, int scale, RoundingMode mode)
{
BigFloat foo = this.Divide(divisor);
BigFloat ret = foo.setScale(scale, mode);
return(ret);
}
internal static Size LayoutRound(Size size, RoundingMode roundingMode)
{
var width = LayoutUtils.RoundX(size.Width, roundingMode);
var height = LayoutUtils.RoundY(size.Height, roundingMode);
return(new Size(width, height));
}
/////////////////////////////////////////////////////////////////////////////////////
public bool Visit(VCExprLiteral node, LineariserOptions options)
{
if (node == VCExpressionGenerator.True)
{
wr.Write("true");
}
else if (node == VCExpressionGenerator.False)
{
wr.Write("false");
}
else if (node is VCExprIntLit)
{
BigNum lit = ((VCExprIntLit)node).Val;
if (lit.IsNegative)
{
// In SMT2 "-42" is an identifier (SMT2, Sect. 3.2 "Symbols")
wr.Write("(- 0 {0})", lit.Abs);
}
else
{
wr.Write(lit);
}
}
else if (node is VCExprRealLit)
{
BigDec lit = ((VCExprRealLit)node).Val;
if (lit.IsNegative)
{
// In SMT2 "-42" is an identifier (SMT2, Sect. 3.2 "Symbols")
wr.Write("(- 0.0 {0})", lit.Abs.ToDecimalString());
}
else
{
wr.Write(lit.ToDecimalString());
}
}
else if (node is VCExprFloatLit)
{
BigFloat lit = ((VCExprFloatLit)node).Val;
wr.Write("(" + lit.ToBVString() + ")");
}
else if (node is VCExprRModeLit)
{
RoundingMode lit = ((VCExprRModeLit)node).Val;
wr.Write(lit.ToString());
}
else if (node is VCExprStringLit)
{
String lit = ((VCExprStringLit)node).Val;
wr.Write("\"" + lit.ToString() + "\"");
}
else
{
Contract.Assert(false);
throw new cce.UnreachableException();
}
return(true);
}
private HNumber(BigInteger mantissa, int exponent, int precision, RoundingMode roundingMode)
{
Mantissa = mantissa;
Exponent = Mantissa.IsZero ? 0 : exponent;
DigitCount = CalculateDigitCount(Mantissa);
Precision = precision;
Round(roundingMode);
}
public BigDecimal SetScale(int scale, RoundingMode roundingMode)
{
if (scale < 0)
{
throw new ArithmeticException("Scale parameter < 0");
}
return(Divide(One, scale, roundingMode));
}
public void Round_DecimalPlaces_using_Money_RoundingMode(RoundingMode roundingMode, DecimalPlaces decimalPlaces, decimal value, decimal expected)
{
// specify different DecimalPlaces for Money ctor to ensure the argument value is used
Money money = new Money("ZAR", value, roundingMode, DecimalPlaces.Nine);
Money actual = money.Round(decimalPlaces);
Assert.That(actual.Amount == expected);
}
public static @string String(this RoundingMode i)
{
if (i >= RoundingMode(len(_RoundingMode_index) - 1L))
{
return("RoundingMode(" + strconv.FormatInt(int64(i), 10L) + ")");
}
return(_RoundingMode_name[_RoundingMode_index[i].._RoundingMode_index[i + 1L]]);
public MathContext(int precision, RoundingMode roundingMode)
{
if (precision < 0)
{
throw new ArgumentException("Precision cannot be less than zero");
}
mPrecision = precision;
mRoundingMode = roundingMode;
}
/**
* Returns a new {@code BigDecimal} whose value is {@code this / divisor}.
* The scale of the result is the scale of {@code this}. If rounding is
* required to meet the specified scale, then the specified rounding mode
* {@code roundingMode} is applied.
*
* @param divisor
* value by which {@code this} is divided.
* @param roundingMode
* rounding mode to be used to round the result.
* @return {@code this / divisor} rounded according to the given rounding
* mode.
* @throws NullPointerException
* if {@code divisor == null} or {@code roundingMode == null}.
* @throws ArithmeticException
* if {@code divisor == 0}.
* @throws ArithmeticException
* if {@code roundingMode == RoundingMode.UNNECESSARY} and
* rounding is necessary according to the scale of this.
*/
public static BigDecimal Divide(BigDecimal a, BigDecimal b, RoundingMode roundingMode)
{
if (!Enum.IsDefined(typeof(RoundingMode), roundingMode))
{
throw new ArgumentException();
}
return(Divide(a, b, a.Scale, roundingMode));
}
public void AddWithContext(string a, int aScale, string b, int bScale, string c, int cScale, int precision, RoundingMode mode)
{
BigDecimal aNumber = new BigDecimal(BigInteger.Parse(a), aScale);
BigDecimal bNumber = new BigDecimal(BigInteger.Parse(b), bScale);
MathContext mc = new MathContext(precision, mode);
BigDecimal result = aNumber.Add(bNumber, mc);
Assert.AreEqual(c, result.ToString(), "incorrect value");
Assert.AreEqual(cScale, result.Scale, "incorrect scale");
}
public void Round_DecimalPlaces_using_Money_RoundingMode(RoundingMode roundingMode, DecimalPlaces decimalPlaces, decimal value, decimal expected)
{
// specify different DecimalPlaces for Money ctor to ensure the argument value is used
Money money = new Money("ZAR", value, roundingMode, DecimalPlaces.Nine);
Money actual = money.Round(decimalPlaces);
Assert.That(actual.Amount == expected);
}
public MathContext(int precision, RoundingMode roundingMode)
{
if (precision < 0)
{
throw new System.ArgumentException("Digits < 0");
}
this.precision = precision;
this.roundingMode = roundingMode;
}
/**
* Returns a new {@code BigDecimal} instance with the specified scale.
* <p>
* If the new scale is greater than the old scale, then additional zeros are
* added to the unscaled value. In this case no rounding is necessary.
* <p>
* If the new scale is smaller than the old scale, then trailing digits are
* removed. If these trailing digits are not zero, then the remaining
* unscaled value has to be rounded. For this rounding operation the
* specified rounding mode is used.
*
* @param newScale
* scale of the result returned.
* @param roundingMode
* rounding mode to be used to round the result.
* @return a new {@code BigDecimal} instance with the specified scale.
* @throws NullPointerException
* if {@code roundingMode == null}.
* @throws ArithmeticException
* if {@code roundingMode == ROUND_UNNECESSARY} and rounding is
* necessary according to the given scale.
*/
public static BigDecimal Scale(BigDecimal number, int newScale, RoundingMode roundingMode)
{
if (!Enum.IsDefined(typeof(RoundingMode), roundingMode))
{
throw new ArgumentException();
}
return(BigDecimalMath.Scale(number, newScale, roundingMode));
}
public void Round_RoundingMode_using_Money_DecimalPlaces(RoundingMode roundingMode, DecimalPlaces decimalPlaces, decimal value, decimal expected)
{
// specify different RoundingMode for Money ctor to ensure the argument value is used
RoundingMode moneyMode = roundingMode == 0 ? roundingMode + 1 : roundingMode - 1;
Money money = new Money("ZAR", value, moneyMode, decimalPlaces);
Money actual = money.Round(roundingMode);
Assert.That(actual.Amount == expected);
}
public Number SetScale(int d, RoundingMode rounding)
{
if (numberState == NumberState.None)
{
return(new Number(NumberState.None, bigDecimal.SetScale(d, rounding)));
}
// Can't round -inf, +inf and NaN
return(this);
}
/// <summary>
/// Constructs a new <see cref="MathContext"/> with the specified precision and with the
/// specified rounding mode.
/// </summary>
/// <param name="precision">The precision for the new context.</param>
/// <param name="roundingMode">The rounding mode for the new context.</param>
/// <remarks>
/// If the precision passed is zero, then this implies that the computations have to
/// be performed exact, the rounding mode in this case is irrelevant.
/// </remarks>
/// <exception cref="ArgumentException">
/// If <paramref name="precision"/> is smaller than zero.
/// </exception>
public MathContext(int precision, RoundingMode roundingMode)
{
if (precision < 0)
{
// math.0C=Digits < 0
throw new ArgumentException(Messages.math0C); //$NON-NLS-1$
}
this.precision = precision;
this.roundingMode = roundingMode;
}
public SqlNumber SetScale(int scale, RoundingMode mode)
{
if (State == NumericState.None)
{
return(new SqlNumber(innerValue.SetScale(scale, mode)));
}
// Can't round -inf, +inf and NaN
return(this);
}
public void Round_RoundingMode_using_Money_DecimalPlaces(RoundingMode roundingMode, DecimalPlaces decimalPlaces, decimal value, decimal expected)
{
// specify different RoundingMode for Money ctor to ensure the argument value is used
RoundingMode moneyMode = roundingMode == 0 ? roundingMode + 1 : roundingMode - 1;
Money money = new Money("ZAR", value, moneyMode, decimalPlaces);
Money actual = money.Round(roundingMode);
Assert.That(actual.Amount == expected);
}
public Float(uint prec = default, RoundingMode mode = default, Accuracy acc = default, form form = default, bool neg = default, nat mant = default, int exp = default)
{
this.prec = prec;
this.mode = mode;
this.acc = acc;
this.form = form;
this.neg = neg;
this.mant = mant;
this.exp = exp;
}
public static RoundingStrategy GetRoundingStrategy(RoundingMode roundingMode)
{
switch (roundingMode)
{
case RoundingMode.HalfAwayFromZero:
{
return new HalfAwayFromZero();
}
case RoundingMode.HalfToEven:
{
return new HalfToEven();
}
case RoundingMode.HalfToOdd:
{
return new HalfToOdd();
}
case RoundingMode.HalfTowardZero:
{
return new HalfTowardZero();
}
}
throw new NotImplementedException();
}
public static int ordinal(RoundingMode mode)
{
switch (mode) {
case RoundingMode.UP:
return 0;
case RoundingMode.DOWN:
return 1;
case RoundingMode.CEILING:
return 2;
case RoundingMode.FLOOR:
return 3;
case RoundingMode.HALF_UP:
return 4;
case RoundingMode.HALF_DOWN:
return 5;
case RoundingMode.HALF_EVEN:
return 6;
case RoundingMode.UNNECESSARY:
return 7;
default:
throw new System.ArgumentException("Invalid rounding mode");
}
}
private static IEnumerable<KeyValuePair<decimal, decimal>> GetTestCaseDictionary(RoundingMode roundingMode)
{
switch (roundingMode)
{
case RoundingMode.HalfAwayFromZero:
{
return HalfAwayFromZeroTestCases.extensionMethodCases;
}
case RoundingMode.HalfToEven:
{
return HalfToEvenTestCases.extensionMethodCases;
}
case RoundingMode.HalfToOdd:
{
return HalfToOddTestCases.extensionMethodCases;
}
case RoundingMode.HalfTowardZero:
{
return HalfTowardZeroTestCases.extensionMethodCases;
}
}
return null;
}
public BigDecimal divide(BigDecimal divisor, RoundingMode roundingMode)
{
return divide(divisor, _scale, roundingMode);
}
public void Round_no_arguments_using_Money_defaults(RoundingMode roundingMode, DecimalPlaces decimalPlaces, decimal value, decimal expected)
{
Money money = new Money("ZAR", value, roundingMode, decimalPlaces);
Money actual = money.Round();
Assert.That(actual.Amount == expected);
}
public static extern int imaqConvolve2(IntPtr dest, IntPtr source, ref float kernel, int matrixRows, int matrixCols, float normalize, IntPtr mask, RoundingMode roundingMode);
public MathContext(int arg0, RoundingMode arg1)
: base(ProxyCtor.I)
{
Instance.CallConstructor("(ILjava/math/RoundingMode;)V", arg0, arg1);
}
private static int roundingBehavior(int parityBit, int fraction, RoundingMode roundingMode)
{
int increment = 0; // the carry after rounding
switch (roundingMode) {
case RoundingMode.UNNECESSARY:
if (fraction != 0) {
throw new ArithmeticException("Rounding necessary");
}
break;
case RoundingMode.UP:
increment = Math.Sign(fraction);
break;
case RoundingMode.DOWN:
break;
case RoundingMode.CEILING:
increment = Math.Max(Math.Sign(fraction), 0);
break;
case RoundingMode.FLOOR:
increment = Math.Min(Math.Sign(fraction), 0);
break;
case RoundingMode.HALF_UP:
if (Math.Abs(fraction) >= 5) {
increment = Math.Sign(fraction);
}
break;
case RoundingMode.HALF_DOWN:
if (Math.Abs(fraction) > 5) {
increment = Math.Sign(fraction);
}
break;
case RoundingMode.HALF_EVEN:
if (Math.Abs(fraction) + parityBit > 5) {
increment = Math.Sign(fraction);
}
break;
}
return increment;
}
/// <summary>
/// コンストラクタ
/// </summary>
public ValueToIntConverter()
{
RoundingMode = RoundingMode.Floor;
}
/**
* Constructs a MathContext from a String that has the same form as one
* produced by the toString() method.
* @param val
*
* @throws IllegalArgumentException if the String is not in the correct
* format or if the precision specified is < 0.
*/
public MathContext(String val)
{
try
{
int roundingModeIndex = val.IndexOf("roundingMode", 10);
precision = Int32.Parse(val.Substring(10, roundingModeIndex - 1));
//TODO: Determine what the logic of the subscring passed to an int parameter without explicit conversion
roundMode = RoundingModes.valueOf(Int32.Parse (val.Substring(roundingModeIndex + 13)));
}
catch (FormatException nfe)
{
throw new ArgumentException("String not in correct format", nfe);
}
catch (ArgumentException iae)
{
throw new ArgumentException("String not in correct format", iae);
}
if (precision < 0)
throw new ArgumentException("Precision cannot be less than 0.");
}
public BigDecimal setScale(int newScale, RoundingMode roundingMode)
{
long diffScale = newScale - (long)_scale;
// Let be: 'this' = [u,s]
if(diffScale == 0) {
return this;
}
if(diffScale > 0) {
// return [u * 10^(s2 - s), newScale]
if(diffScale < LONG_TEN_POW.Length &&
(this._bitLength + LONG_TEN_POW_BIT_LENGTH[(int)diffScale]) < 64 ) {
return valueOf(this.smallValue*LONG_TEN_POW[(int)diffScale],newScale);
}
return new BigDecimal(Multiplication.multiplyByTenPow(getUnscaledValue(),(int)diffScale), newScale);
}
// diffScale < 0
// return [u,s] / [1,newScale] with the appropriate scale and rounding
if(this._bitLength < 64 && -diffScale < LONG_TEN_POW.Length) {
return dividePrimitiveLongs(this.smallValue, LONG_TEN_POW[(int)-diffScale], newScale,roundingMode);
}
return divideBigIntegers(this.getUnscaledValue(),Multiplication.powerOf10(-diffScale),newScale,roundingMode);
}
public static Money Round(this Money money, RoundingMode roundingMode, DecimalPlaces decimalPlaces)
{
RoundingStrategy strategy = RoundingStrategyFactory.GetRoundingStrategy(roundingMode);
return strategy.Round(money, (int) decimalPlaces);
}
public void setRoundingMode(RoundingMode arg0)
{
Instance.CallMethod("setRoundingMode", "(Ljava/math/RoundingMode;)V", arg0);
}
/// <summary>
/// Limits the nmber of significant digits.
/// </summary>
/// <param name="r">The value.</param>
/// <param name="nrDigits">The number of significant digits.</param>
/// <param name="roundingMode">The mode the value is rounded.</param>
/// <returns></returns>
public static double LimitSignificantDigits(double r, int nrDigits, RoundingMode roundingMode = RoundingMode.Nearest)
{
if (r != 0)
{
int exponent = (int)Math.Truncate(Math.Log10(Math.Abs(r)));
double mantissa = r / (Math.Pow(10, exponent));
int nrDig;
if (Math.Abs(mantissa) < 1d)
nrDig = nrDigits;
else
nrDig = nrDigits - 1;
switch (roundingMode)
{
case RoundingMode.Nearest:
mantissa = Math.Round(mantissa * Math.Pow(10, nrDig));
break;
case RoundingMode.Up:
mantissa = Math.Ceiling(mantissa * Math.Pow(10, nrDig));
break;
case RoundingMode.Down:
mantissa = Math.Floor(mantissa * Math.Pow(10, nrDig));
break;
case RoundingMode.Truncate:
mantissa = Math.Truncate(mantissa * Math.Pow(10, nrDig));
break;
default:
break;
}
return mantissa / Math.Pow(10, nrDig - exponent);
}
return 0;
}
///<summary>
///</summary>
///<param name="d"></param>
///<param name="round_enum"></param>
///<returns></returns>
public BigNumber SetScale(int d, RoundingMode round_enum)
{
if (numberState == 0) {
return new BigNumber(NumberState.None, bigDecimal.SetScale(d, round_enum));
}
// Can't round -inf, +inf and NaN
return this;
}
public BigDecimal divide(BigDecimal divisor, int scale, RoundingMode roundingMode)
{
// Let be: this = [u1,s1] and divisor = [u2,s2]
if (divisor.isZero()) {
throw new ArithmeticException("Division by zero");
}
long diffScale = ((long)this._scale - divisor._scale) - scale;
if(this._bitLength < 64 && divisor._bitLength < 64 ) {
if(diffScale == 0) {
return dividePrimitiveLongs(this.smallValue,
divisor.smallValue,
scale,
roundingMode );
} else if(diffScale > 0) {
if(diffScale < LONG_TEN_POW.Length &&
divisor._bitLength + LONG_TEN_POW_BIT_LENGTH[(int)diffScale] < 64) {
return dividePrimitiveLongs(this.smallValue,
divisor.smallValue*LONG_TEN_POW[(int)diffScale],
_scale,
roundingMode);
}
} else { // diffScale < 0
if(-diffScale < LONG_TEN_POW.Length &&
this._bitLength + LONG_TEN_POW_BIT_LENGTH[(int)-diffScale] < 64) {
return dividePrimitiveLongs(this.smallValue*LONG_TEN_POW[(int)-diffScale],
divisor.smallValue,
scale,
roundingMode);
}
}
}
BigInteger scaledDividend = this.getUnscaledValue();
BigInteger scaledDivisor = divisor.getUnscaledValue(); // for scaling of 'u2'
if (diffScale > 0) {
// Multiply 'u2' by: 10^((s1 - s2) - scale)
scaledDivisor = Multiplication.multiplyByTenPow(scaledDivisor, (int)diffScale);
} else if (diffScale < 0) {
// Multiply 'u1' by: 10^(scale - (s1 - s2))
scaledDividend = Multiplication.multiplyByTenPow(scaledDividend, (int)-diffScale);
}
return divideBigIntegers(scaledDividend, scaledDivisor, scale, roundingMode);
}
public static extern int imaqDivide2(IntPtr dest, IntPtr sourceA, IntPtr sourceB, RoundingMode roundingMode);
/**
* Constructs a new MathContext with the specified precision and rounding
* mode.
* @param setPrecision the precision
* @param setRoundingMode the rounding mode
*
* @throws IllegalArgumentException if precision is < 0.
*/
public MathContext(int setPrecision, RoundingMode setRoundingMode)
{
if (setPrecision < 0)
throw new ArgumentException("Precision cannot be less than zero.");
precision = setPrecision;
roundMode = setRoundingMode;
}
private static BigDecimal divideBigIntegers(BigInteger scaledDividend, BigInteger scaledDivisor, int scale, RoundingMode roundingMode)
{
BigInteger[] quotAndRem = scaledDividend.divideAndRemainder(scaledDivisor); // quotient and remainder
// If after division there is a remainder...
BigInteger quotient = quotAndRem[0];
BigInteger remainder = quotAndRem[1];
if (remainder.signum() == 0) {
return new BigDecimal(quotient, scale);
}
int sign = scaledDividend.signum() * scaledDivisor.signum();
int compRem; // 'compare to remainder'
if(scaledDivisor.bitLength() < 63) { // 63 in order to avoid out of long after <<1
long rem = remainder.longValue();
long divisor = scaledDivisor.longValue();
compRem = longCompareTo(Math.Abs(rem) << 1,Math.Abs(divisor));
// To look if there is a carry
compRem = roundingBehavior(quotient.testBit(0) ? 1 : 0,
sign * (5 + compRem), roundingMode);
} else {
// Checking if: remainder * 2 >= scaledDivisor
compRem = remainder.abs().shiftLeftOneBit().compareTo(scaledDivisor.abs());
compRem = roundingBehavior(quotient.testBit(0) ? 1 : 0,
sign * (5 + compRem), roundingMode);
}
if (compRem != 0) {
if(quotient.bitLength() < 63) {
return valueOf(quotient.longValue() + compRem,scale);
}
quotient = quotient.add(BigInteger.valueOf(compRem));
return new BigDecimal(quotient, scale);
}
// Constructing the result with the appropriate unscaled value
return new BigDecimal(quotient, scale);
}
private static BigDecimal dividePrimitiveLongs(long scaledDividend, long scaledDivisor, int scale, RoundingMode roundingMode)
{
long quotient = scaledDividend / scaledDivisor;
long remainder = scaledDividend % scaledDivisor;
int sign = Math.Sign( scaledDividend ) * Math.Sign( scaledDivisor );
if (remainder != 0) {
// Checking if: remainder * 2 >= scaledDivisor
int compRem; // 'compare to remainder'
compRem = longCompareTo(Math.Abs(remainder) << 1,Math.Abs(scaledDivisor));
// To look if there is a carry
quotient += roundingBehavior(((int)quotient) & 1,
sign * (5 + compRem),
roundingMode);
}
// Constructing the result with the appropriate unscaled value
return valueOf(quotient, scale);
}
/// <summary>
/// コンストラクタ
/// </summary>
public UIntCalcExtension(string expression, RoundingMode mode)
{
Mode = mode;
Expression = expression;
}
public static Money Round(this Money money, RoundingMode roundingMode)
{
return money.Round(roundingMode, (DecimalPlaces)money.DecimalPlaces);
}
/// <summary>
/// Set the <rounding-policy> node of
///<merchant-checkout-flow-support>
/// </summary>
/// <param name="mode">The <see cref="RoundingMode"/></param>
/// <param name="rule">The <see cref="RoundingRule"/></param>
public void SetRoundingPolicy(RoundingMode mode, RoundingRule rule)
{
_roundingRuleSet = true;
_roundingMode = mode;
_roundingRule = rule;
}
public void PowWithContext(string a, int aScale, int exp, string c, int cScale, int precision, RoundingMode roundingMode)
{
BigDecimal aNumber = new BigDecimal(BigInteger.Parse(a), aScale);
MathContext mc = new MathContext(precision, roundingMode);
BigDecimal result = aNumber.Pow(exp, mc);
Assert.AreEqual(c, result.ToString(), "incorrect value");
Assert.AreEqual(cScale, result.Scale, "incorrect scale");
}