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;
    }
}
