porting shell from nuget to local

src/Shared/Microsoft.Windows.Shell/Standard/DoubleUtilities.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Standard
+{
+	internal static class DoubleUtilities
+	{
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool AreClose(double value1, double value2)
+		{
+			if (value1 == value2)
+			{
+				return true;
+			}
+			double num = value1 - value2;
+			return num < 1.53E-06 && num > -1.53E-06;
+		}
+
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool LessThan(double value1, double value2)
+		{
+			return value1 < value2 && !DoubleUtilities.AreClose(value1, value2);
+		}
+
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool GreaterThan(double value1, double value2)
+		{
+			return value1 > value2 && !DoubleUtilities.AreClose(value1, value2);
+		}
+
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool LessThanOrClose(double value1, double value2)
+		{
+			return value1 < value2 || DoubleUtilities.AreClose(value1, value2);
+		}
+
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool GreaterThanOrClose(double value1, double value2)
+		{
+			return value1 > value2 || DoubleUtilities.AreClose(value1, value2);
+		}
+
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool IsFinite(double value)
+		{
+			return !double.IsNaN(value) && !double.IsInfinity(value);
+		}
+
+		[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		public static bool IsValidSize(double value)
+		{
+			return DoubleUtilities.IsFinite(value) && DoubleUtilities.GreaterThanOrClose(value, 0.0);
+		}
+
+		private const double Epsilon = 1.53E-06;
+	}
+}