diff options
Diffstat (limited to 'src/mscorlib/src/System/Double.cs')
| -rw-r--r-- | src/mscorlib/src/System/Double.cs | 226 |
1 files changed, 134 insertions, 92 deletions
diff --git a/src/mscorlib/src/System/Double.cs b/src/mscorlib/src/System/Double.cs index 1e4e477366..f2c5cec219 100644 --- a/src/mscorlib/src/System/Double.cs +++ b/src/mscorlib/src/System/Double.cs @@ -11,19 +11,20 @@ ** ** ===========================================================*/ -namespace System { - using System; - using System.Globalization; - using System.Runtime.InteropServices; - using System.Runtime.CompilerServices; - using System.Runtime.ConstrainedExecution; - using System.Diagnostics.Contracts; - -[Serializable] -[StructLayout(LayoutKind.Sequential)] +using System; +using System.Globalization; +using System.Runtime.InteropServices; +using System.Runtime.CompilerServices; +using System.Runtime.ConstrainedExecution; +using System.Diagnostics.Contracts; + +namespace System +{ + [Serializable] + [StructLayout(LayoutKind.Sequential)] public struct Double : IComparable, IFormattable, IConvertible - , IComparable<Double>, IEquatable<Double> + , IComparable<Double>, IEquatable<Double> { internal double m_value; @@ -35,22 +36,24 @@ namespace System { // Note Epsilon should be a double whose hex representation is 0x1 // on little endian machines. - public const double Epsilon = 4.9406564584124654E-324; + public const double Epsilon = 4.9406564584124654E-324; public const double NegativeInfinity = (double)-1.0 / (double)(0.0); public const double PositiveInfinity = (double)1.0 / (double)(0.0); public const double NaN = (double)0.0 / (double)0.0; - + internal static double NegativeZero = BitConverter.Int64BitsToDouble(unchecked((long)0x8000000000000000)); [Pure] [System.Runtime.Versioning.NonVersionable] - public unsafe static bool IsInfinity(double d) { + public unsafe static bool IsInfinity(double d) + { return (*(long*)(&d) & 0x7FFFFFFFFFFFFFFF) == 0x7FF0000000000000; } [Pure] [System.Runtime.Versioning.NonVersionable] - public static bool IsPositiveInfinity(double d) { + public static bool IsPositiveInfinity(double d) + { //Jit will generate inlineable code with this if (d == double.PositiveInfinity) { @@ -64,7 +67,8 @@ namespace System { [Pure] [System.Runtime.Versioning.NonVersionable] - public static bool IsNegativeInfinity(double d) { + public static bool IsNegativeInfinity(double d) + { //Jit will generate inlineable code with this if (d == double.NegativeInfinity) { @@ -77,7 +81,8 @@ namespace System { } [Pure] - internal unsafe static bool IsNegative(double d) { + internal unsafe static bool IsNegative(double d) + { return (*(UInt64*)(&d) & 0x8000000000000000) == 0x8000000000000000; } @@ -96,11 +101,14 @@ namespace System { // // Returns a value less than zero if this object // - public int CompareTo(Object value) { - if (value == null) { + public int CompareTo(Object value) + { + if (value == null) + { return 1; } - if (value is Double) { + if (value is Double) + { double d = (double)value; if (m_value < d) return -1; if (m_value > d) return 1; @@ -112,10 +120,11 @@ namespace System { else return 1; } - throw new ArgumentException(Environment.GetResourceString("Arg_MustBeDouble")); + throw new ArgumentException(SR.Arg_MustBeDouble); } - public int CompareTo(Double value) { + public int CompareTo(Double value) + { if (m_value < value) return -1; if (m_value > value) return 1; if (m_value == value) return 0; @@ -129,51 +138,61 @@ namespace System { // True if obj is another Double with the same value as the current instance. This is // a method of object equality, that only returns true if obj is also a double. - public override bool Equals(Object obj) { - if (!(obj is Double)) { + public override bool Equals(Object obj) + { + if (!(obj is Double)) + { return false; } double temp = ((Double)obj).m_value; // This code below is written this way for performance reasons i.e the != and == check is intentional. - if (temp == m_value) { + if (temp == m_value) + { return true; } return IsNaN(temp) && IsNaN(m_value); } [System.Runtime.Versioning.NonVersionable] - public static bool operator ==(Double left, Double right) { + public static bool operator ==(Double left, Double right) + { return left == right; } [System.Runtime.Versioning.NonVersionable] - public static bool operator !=(Double left, Double right) { + public static bool operator !=(Double left, Double right) + { return left != right; } [System.Runtime.Versioning.NonVersionable] - public static bool operator <(Double left, Double right) { + public static bool operator <(Double left, Double right) + { return left < right; } [System.Runtime.Versioning.NonVersionable] - public static bool operator >(Double left, Double right) { + public static bool operator >(Double left, Double right) + { return left > right; } [System.Runtime.Versioning.NonVersionable] - public static bool operator <=(Double left, Double right) { + public static bool operator <=(Double left, Double right) + { return left <= right; } [System.Runtime.Versioning.NonVersionable] - public static bool operator >=(Double left, Double right) { + public static bool operator >=(Double left, Double right) + { return left >= right; } public bool Equals(Double obj) { - if (obj == m_value) { + if (obj == m_value) + { return true; } return IsNaN(obj) && IsNaN(m_value); @@ -182,9 +201,11 @@ namespace System { //The hashcode for a double is the absolute value of the integer representation //of that double. // - public unsafe override int GetHashCode() { + public unsafe override int GetHashCode() + { double d = m_value; - if (d == 0) { + if (d == 0) + { // Ensure that 0 and -0 have the same hash code return 0; } @@ -192,44 +213,52 @@ namespace System { return unchecked((int)value) ^ ((int)(value >> 32)); } - public override String ToString() { + public override String ToString() + { Contract.Ensures(Contract.Result<String>() != null); return Number.FormatDouble(m_value, null, NumberFormatInfo.CurrentInfo); } - public String ToString(String format) { + public String ToString(String format) + { Contract.Ensures(Contract.Result<String>() != null); return Number.FormatDouble(m_value, format, NumberFormatInfo.CurrentInfo); } - - public String ToString(IFormatProvider provider) { + + public String ToString(IFormatProvider provider) + { Contract.Ensures(Contract.Result<String>() != null); return Number.FormatDouble(m_value, null, NumberFormatInfo.GetInstance(provider)); } - - public String ToString(String format, IFormatProvider provider) { + + public String ToString(String format, IFormatProvider provider) + { Contract.Ensures(Contract.Result<String>() != null); return Number.FormatDouble(m_value, format, NumberFormatInfo.GetInstance(provider)); } - public static double Parse(String s) { - return Parse(s, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.CurrentInfo); + public static double Parse(String s) + { + return Parse(s, NumberStyles.Float | NumberStyles.AllowThousands, NumberFormatInfo.CurrentInfo); } - public static double Parse(String s, NumberStyles style) { + public static double Parse(String s, NumberStyles style) + { NumberFormatInfo.ValidateParseStyleFloatingPoint(style); return Parse(s, style, NumberFormatInfo.CurrentInfo); } - public static double Parse(String s, IFormatProvider provider) { - return Parse(s, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.GetInstance(provider)); + public static double Parse(String s, IFormatProvider provider) + { + return Parse(s, NumberStyles.Float | NumberStyles.AllowThousands, NumberFormatInfo.GetInstance(provider)); } - public static double Parse(String s, NumberStyles style, IFormatProvider provider) { + public static double Parse(String s, NumberStyles style, IFormatProvider provider) + { NumberFormatInfo.ValidateParseStyleFloatingPoint(style); return Parse(s, style, NumberFormatInfo.GetInstance(provider)); } - + // Parses a double from a String in the given style. If // a NumberFormatInfo isn't specified, the current culture's // NumberFormatInfo is assumed. @@ -238,34 +267,46 @@ namespace System { // PositiveInfinity or NegativeInfinity for a number that is too // large or too small. // - private static double Parse(String s, NumberStyles style, NumberFormatInfo info) { + private static double Parse(String s, NumberStyles style, NumberFormatInfo info) + { return Number.ParseDouble(s, style, info); } - public static bool TryParse(String s, out double result) { - return TryParse(s, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.CurrentInfo, out result); + public static bool TryParse(String s, out double result) + { + return TryParse(s, NumberStyles.Float | NumberStyles.AllowThousands, NumberFormatInfo.CurrentInfo, out result); } - public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out double result) { + 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) { + + private static bool TryParse(String s, NumberStyles style, NumberFormatInfo info, out double result) + { + if (s == null) + { result = 0; return false; } bool success = Number.TryParseDouble(s, style, info, out result); - if (!success) { + if (!success) + { String sTrim = s.Trim(); - if (sTrim.Equals(info.PositiveInfinitySymbol)) { + if (sTrim.Equals(info.PositiveInfinitySymbol)) + { result = PositiveInfinity; - } else if (sTrim.Equals(info.NegativeInfinitySymbol)) { + } + else if (sTrim.Equals(info.NegativeInfinitySymbol)) + { result = NegativeInfinity; - } else if (sTrim.Equals(info.NaNSymbol)) { + } + else if (sTrim.Equals(info.NaNSymbol)) + { result = NaN; - } else + } + else return false; // We really failed } return true; @@ -275,82 +316,83 @@ namespace System { // IConvertible implementation // - public TypeCode GetTypeCode() { + public TypeCode GetTypeCode() + { return TypeCode.Double; } - /// <internalonly/> - bool IConvertible.ToBoolean(IFormatProvider provider) { + bool IConvertible.ToBoolean(IFormatProvider provider) + { return Convert.ToBoolean(m_value); } - /// <internalonly/> - char IConvertible.ToChar(IFormatProvider provider) { - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "Double", "Char")); + char IConvertible.ToChar(IFormatProvider provider) + { + throw new InvalidCastException(SR.Format(SR.InvalidCast_FromTo, "Double", "Char")); } - /// <internalonly/> - sbyte IConvertible.ToSByte(IFormatProvider provider) { + sbyte IConvertible.ToSByte(IFormatProvider provider) + { return Convert.ToSByte(m_value); } - /// <internalonly/> - byte IConvertible.ToByte(IFormatProvider provider) { + byte IConvertible.ToByte(IFormatProvider provider) + { return Convert.ToByte(m_value); } - /// <internalonly/> - short IConvertible.ToInt16(IFormatProvider provider) { + short IConvertible.ToInt16(IFormatProvider provider) + { return Convert.ToInt16(m_value); } - /// <internalonly/> - ushort IConvertible.ToUInt16(IFormatProvider provider) { + ushort IConvertible.ToUInt16(IFormatProvider provider) + { return Convert.ToUInt16(m_value); } - /// <internalonly/> - int IConvertible.ToInt32(IFormatProvider provider) { + int IConvertible.ToInt32(IFormatProvider provider) + { return Convert.ToInt32(m_value); } - /// <internalonly/> - uint IConvertible.ToUInt32(IFormatProvider provider) { + uint IConvertible.ToUInt32(IFormatProvider provider) + { return Convert.ToUInt32(m_value); } - /// <internalonly/> - long IConvertible.ToInt64(IFormatProvider provider) { + long IConvertible.ToInt64(IFormatProvider provider) + { return Convert.ToInt64(m_value); } - /// <internalonly/> - ulong IConvertible.ToUInt64(IFormatProvider provider) { + ulong IConvertible.ToUInt64(IFormatProvider provider) + { return Convert.ToUInt64(m_value); } - /// <internalonly/> - float IConvertible.ToSingle(IFormatProvider provider) { + float IConvertible.ToSingle(IFormatProvider provider) + { return Convert.ToSingle(m_value); } - /// <internalonly/> - double IConvertible.ToDouble(IFormatProvider provider) { + double IConvertible.ToDouble(IFormatProvider provider) + { return m_value; } - /// <internalonly/> - Decimal IConvertible.ToDecimal(IFormatProvider provider) { + Decimal IConvertible.ToDecimal(IFormatProvider provider) + { return Convert.ToDecimal(m_value); } - /// <internalonly/> - DateTime IConvertible.ToDateTime(IFormatProvider provider) { - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "Double", "DateTime")); + DateTime IConvertible.ToDateTime(IFormatProvider provider) + { + throw new InvalidCastException(SR.Format(SR.InvalidCast_FromTo, "Double", "DateTime")); } - /// <internalonly/> - Object IConvertible.ToType(Type type, IFormatProvider provider) { + Object IConvertible.ToType(Type type, IFormatProvider provider) + { return Convert.DefaultToType((IConvertible)this, type, provider); } } |