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feat(IncrementNumberRounder): Implement RoundDouble Method
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src/Uno.UWP/Globalization/NumberFormatting/IncrementNumberRounder.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| using System; | ||
| using System.Linq; | ||
|
|
||
| namespace Windows.Globalization.NumberFormatting | ||
| { | ||
| public partial class IncrementNumberRounder : global::Windows.Globalization.NumberFormatting.INumberRounder | ||
| { | ||
| private static readonly double[] Exceptions = new double[] | ||
| { | ||
| 1E-11, | ||
| 1E-12, | ||
| 1E-13, | ||
| 1E-14, | ||
| 1E-15, | ||
| 1E-16, | ||
| 1E-17, | ||
| 1E-18, | ||
| 1E-19, | ||
| 1E-20, | ||
| }; | ||
|
|
||
| private RoundingAlgorithm roundingAlgorithm = RoundingAlgorithm.RoundHalfUp; | ||
| private double increment = 1d; | ||
|
|
||
| public RoundingAlgorithm RoundingAlgorithm | ||
| { | ||
| get => roundingAlgorithm; | ||
| set | ||
| { | ||
| if (value == RoundingAlgorithm.None) | ||
| throw new ArgumentException("The parameter is incorrect"); | ||
|
|
||
| roundingAlgorithm = value; | ||
| } | ||
| } | ||
|
|
||
| public double Increment | ||
| { | ||
| get => increment; | ||
| set | ||
| { | ||
| if (value <= 0) | ||
| { | ||
| throw new ArgumentException("The parameter is incorrect"); | ||
| } | ||
| else if (value <= 0.5) | ||
| { | ||
| if (!Exceptions.Any(e => e == value)) | ||
| { | ||
| var inv = (1 / value); | ||
| var n = Math.Truncate(inv); | ||
| if (n < 2 || n > 10000000000) | ||
| { | ||
| throw new ArgumentException("The parameter is incorrect"); | ||
| } | ||
|
|
||
| var modf = Math.Round(inv % 1, 14, MidpointRounding.AwayFromZero); | ||
| if (modf > 0) | ||
| { | ||
| throw new ArgumentException("The parameter is incorrect"); | ||
| } | ||
| } | ||
| } | ||
| else if (value < 1) | ||
| { | ||
| throw new ArgumentException("The parameter is incorrect"); | ||
| } | ||
| else if (Math.Truncate(value) != value) | ||
| { | ||
| throw new ArgumentException("The parameter is incorrect"); | ||
| } | ||
|
|
||
|
|
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| increment = value; | ||
| } | ||
| } | ||
|
|
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| public IncrementNumberRounder() | ||
| { | ||
| } | ||
|
|
||
| public double RoundDouble(double value) | ||
| { | ||
| var rounded = value / increment; | ||
| rounded = Rounder.Round(rounded, 0, RoundingAlgorithm); | ||
| rounded *= increment; | ||
|
|
||
| return rounded; | ||
| } | ||
| } | ||
| } |
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