65 lines
2.0 KiB
C#
65 lines
2.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Runtime.InteropServices;
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namespace DevComponents.DotNetBar.Metro.Helpers
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{
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internal static class DoubleHelpers
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{
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/// <summary>
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/// Gets whether values are close.
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/// </summary>
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/// <param name="value1">First value.</param>
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/// <param name="value2">Second value</param>
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/// <returns>true if values are close enough</returns>
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public static bool AreClose(double value1, double value2)
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{
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if (value1 == value2)
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{
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return true;
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}
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double num2 = ((Math.Abs(value1) + Math.Abs(value2)) + 10.0) * 2.2204460492503131E-16;
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double num = value1 - value2;
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return ((-num2 < num) && (num2 > num));
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}
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/// <summary>
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/// Gets whether value is zero
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/// </summary>
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/// <param name="value">value to check</param>
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/// <returns>true if value is considered zero</returns>
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public static bool IsZero(double value)
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{
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return (Math.Abs(value) < 2.2204460492503131E-15);
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}
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/// <summary>
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/// Gets whether value is not an number.
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/// </summary>
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/// <param name="value">value to test</param>
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/// <returns>true if value is not an number</returns>
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public static bool IsNaN(double value)
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{
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NanUnion union = new NanUnion();
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union.DoubleValue = value;
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ulong num = union.UintValue & 18442240474082181120L;
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ulong num2 = union.UintValue & ((ulong)0xfffffffffffffL);
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if ((num != 0x7ff0000000000000L) && (num != 18442240474082181120L))
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{
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return false;
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}
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return (num2 != 0L);
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}
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[StructLayout(LayoutKind.Explicit)]
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private struct NanUnion
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{
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// Fields
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[FieldOffset(0)]
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internal double DoubleValue;
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[FieldOffset(0)]
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internal ulong UintValue;
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}
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}
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}
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