Double.cs

using System.Globalization;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Security;

namespace System
{
    [Serializable]
    [ComVisible(true)]
    [__DynamicallyInvokable]
    public struct Double : IComparable, IFormattable, IConvertible, IComparable<double>, IEquatable<double>
    {
        internal double m_value;

        [__DynamicallyInvokable]
        public const double MinValue = -1.7976931348623157E+308;

        [__DynamicallyInvokable]
        public const double MaxValue = 1.7976931348623157E+308;

        [__DynamicallyInvokable]
        public const double Epsilon = 4.94065645841247E-324;

        [__DynamicallyInvokable]
        public const double NegativeInfinity = -1.0 / 0.0;

        [__DynamicallyInvokable]
        public const double PositiveInfinity = 1.0 / 0.0;

        [__DynamicallyInvokable]
        public const double NaN = 0.0 / 0.0;

        internal static double NegativeZero = BitConverter.Int64BitsToDouble(long.MinValue);

        [SecuritySafeCritical]
        [NonVersionable]
        [__DynamicallyInvokable]
        public unsafe static bool IsInfinity(double d)
        {
            return (*(long*)(&d) & long.MaxValue) == 9218868437227405312L;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool IsPositiveInfinity(double d)
        {
            if (d == double.PositiveInfinity)
            {
                return true;
            }
            return false;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool IsNegativeInfinity(double d)
        {
            if (d == double.NegativeInfinity)
            {
                return true;
            }
            return false;
        }

        [SecuritySafeCritical]
        internal unsafe static bool IsNegative(double d)
        {
            return (*(long*)(&d) & long.MinValue) == long.MinValue;
        }

        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [SecuritySafeCritical]
        [NonVersionable]
        [__DynamicallyInvokable]
        public unsafe static bool IsNaN(double d)
        {
            return (ulong)(*(long*)(&d) & long.MaxValue) > 9218868437227405312uL;
        }

        public int CompareTo(object value)
        {
            if (value == null)
            {
                return 1;
            }
            if (value is double)
            {
                double num = (double)value;
                if (this < num)
                {
                    return -1;
                }
                if (this > num)
                {
                    return 1;
                }
                if (this == num)
                {
                    return 0;
                }
                if (IsNaN(this))
                {
                    if (!IsNaN(num))
                    {
                        return -1;
                    }
                    return 0;
                }
                return 1;
            }
            throw new ArgumentException(Environment.GetResourceString("Arg_MustBeDouble"));
        }

        [__DynamicallyInvokable]
        public int CompareTo(double value)
        {
            if (this < value)
            {
                return -1;
            }
            if (this > value)
            {
                return 1;
            }
            if (this == value)
            {
                return 0;
            }
            if (IsNaN(this))
            {
                if (!IsNaN(value))
                {
                    return -1;
                }
                return 0;
            }
            return 1;
        }

        [__DynamicallyInvokable]
        public override bool Equals(object obj)
        {
            if (!(obj is double))
            {
                return false;
            }
            double num = (double)obj;
            if (num == this)
            {
                return true;
            }
            if (IsNaN(num))
            {
                return IsNaN(this);
            }
            return false;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool operator ==(double left, double right)
        {
            return left == right;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool operator !=(double left, double right)
        {
            return left != right;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool operator <(double left, double right)
        {
            return left < right;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool operator >(double left, double right)
        {
            return left > right;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool operator <=(double left, double right)
        {
            return left <= right;
        }

        [NonVersionable]
        [__DynamicallyInvokable]
        public static bool operator >=(double left, double right)
        {
            return left >= right;
        }

        [__DynamicallyInvokable]
        public bool Equals(double obj)
        {
            if (obj == this)
            {
                return true;
            }
            if (IsNaN(obj))
            {
                return IsNaN(this);
            }
            return false;
        }

        [SecuritySafeCritical]
        [__DynamicallyInvokable]
        public unsafe override int GetHashCode()
        {
            double num = this;
            if (num == 0.0)
            {
                return 0;
            }
            long num2 = *(long*)(&num);
            return (int)num2 ^ (int)(num2 >> 32);
        }

        [SecuritySafeCritical]
        [__DynamicallyInvokable]
        public override string ToString()
        {
            return Number.FormatDouble(this, null, NumberFormatInfo.CurrentInfo);
        }

        [SecuritySafeCritical]
        [__DynamicallyInvokable]
        public string ToString(string format)
        {
            return Number.FormatDouble(this, format, NumberFormatInfo.CurrentInfo);
        }

        [SecuritySafeCritical]
        [__DynamicallyInvokable]
        public string ToString(IFormatProvider provider)
        {
            return Number.FormatDouble(this, null, NumberFormatInfo.GetInstance(provider));
        }

        [SecuritySafeCritical]
        [__DynamicallyInvokable]
        public string ToString(string format, IFormatProvider provider)
        {
            return Number.FormatDouble(this, format, NumberFormatInfo.GetInstance(provider));
        }

        [__DynamicallyInvokable]
        public static double Parse(string s)
        {
            return Parse(s, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite | NumberStyles.AllowLeadingSign | NumberStyles.AllowDecimalPoint | NumberStyles.AllowThousands | NumberStyles.AllowExponent, NumberFormatInfo.CurrentInfo);
        }

        [__DynamicallyInvokable]
        public static double Parse(string s, NumberStyles style)
        {
            NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
            return Parse(s, style, NumberFormatInfo.CurrentInfo);
        }

        [__DynamicallyInvokable]
        public static double Parse(string s, IFormatProvider provider)
        {
            return Parse(s, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite | NumberStyles.AllowLeadingSign | NumberStyles.AllowDecimalPoint | NumberStyles.AllowThousands | NumberStyles.AllowExponent, NumberFormatInfo.GetInstance(provider));
        }

        [__DynamicallyInvokable]
        public static double Parse(string s, NumberStyles style, IFormatProvider provider)
        {
            NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
            return Parse(s, style, NumberFormatInfo.GetInstance(provider));
        }

        private static double Parse(string s, NumberStyles style, NumberFormatInfo info)
        {
            return Number.ParseDouble(s, style, info);
        }

        [__DynamicallyInvokable]
        public static bool TryParse(string s, out double result)
        {
            return TryParse(s, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite | NumberStyles.AllowLeadingSign | NumberStyles.AllowDecimalPoint | NumberStyles.AllowThousands | NumberStyles.AllowExponent, NumberFormatInfo.CurrentInfo, out result);
        }

        [__DynamicallyInvokable]
        public static bool TryParse(string s, NumberStyles style, IFormatProvider provider, out double result)
        {
            NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
            return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result);
        }

        private static bool TryParse(string s, NumberStyles style, NumberFormatInfo info, out double result)
        {
            if (s == null)
            {
                result = 0.0;
                return false;
            }
            if (!Number.TryParseDouble(s, style, info, out result))
            {
                string text = s.Trim();
                if (text.Equals(info.PositiveInfinitySymbol))
                {
                    result = double.PositiveInfinity;
                }
                else if (text.Equals(info.NegativeInfinitySymbol))
                {
                    result = double.NegativeInfinity;
                }
                else
                {
                    if (!text.Equals(info.NaNSymbol))
                    {
                        return false;
                    }
                    result = double.NaN;
                }
            }
            return true;
        }

        public TypeCode GetTypeCode()
        {
            return TypeCode.Double;
        }

        [__DynamicallyInvokable]
        bool IConvertible.ToBoolean(IFormatProvider provider)
        {
            return Convert.ToBoolean(this);
        }

        [__DynamicallyInvokable]
        char IConvertible.ToChar(IFormatProvider provider)
        {
            throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "Double", "Char"));
        }

        [__DynamicallyInvokable]
        sbyte IConvertible.ToSByte(IFormatProvider provider)
        {
            return Convert.ToSByte(this);
        }

        [__DynamicallyInvokable]
        byte IConvertible.ToByte(IFormatProvider provider)
        {
            return Convert.ToByte(this);
        }

        [__DynamicallyInvokable]
        short IConvertible.ToInt16(IFormatProvider provider)
        {
            return Convert.ToInt16(this);
        }

        [__DynamicallyInvokable]
        ushort IConvertible.ToUInt16(IFormatProvider provider)
        {
            return Convert.ToUInt16(this);
        }

        [__DynamicallyInvokable]
        int IConvertible.ToInt32(IFormatProvider provider)
        {
            return Convert.ToInt32(this);
        }

        [__DynamicallyInvokable]
        uint IConvertible.ToUInt32(IFormatProvider provider)
        {
            return Convert.ToUInt32(this);
        }

        [__DynamicallyInvokable]
        long IConvertible.ToInt64(IFormatProvider provider)
        {
            return Convert.ToInt64(this);
        }

        [__DynamicallyInvokable]
        ulong IConvertible.ToUInt64(IFormatProvider provider)
        {
            return Convert.ToUInt64(this);
        }

        [__DynamicallyInvokable]
        float IConvertible.ToSingle(IFormatProvider provider)
        {
            return Convert.ToSingle(this);
        }

        [__DynamicallyInvokable]
        double IConvertible.ToDouble(IFormatProvider provider)
        {
            return this;
        }

        [__DynamicallyInvokable]
        decimal IConvertible.ToDecimal(IFormatProvider provider)
        {
            return Convert.ToDecimal(this);
        }

        [__DynamicallyInvokable]
        DateTime IConvertible.ToDateTime(IFormatProvider provider)
        {
            throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "Double", "DateTime"));
        }

        [__DynamicallyInvokable]
        object IConvertible.ToType(Type type, IFormatProvider provider)
        {
            return Convert.DefaultToType(this, type, provider);
        }
    }
}