Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/single.cs

@@ -0,0 +1,464 @@
+// ==++==
+//
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+// ==--==
+/*============================================================
+**
+** Class:  Single
+**
+**
+** Purpose: A wrapper class for the primitive type float.
+**
+**
+===========================================================*/
+namespace System {
+
+    using System.Globalization;
+    using System;
+///#if GENERICS_WORK
+///    using System.Numerics;
+///#endif
+    using System.Runtime.InteropServices;
+    using System.Runtime.CompilerServices;
+    using System.Runtime.ConstrainedExecution;
+    using System.Diagnostics.Contracts;
+
+[Serializable]
+[System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
+[System.Runtime.InteropServices.ComVisible(true)]
+#if GENERICS_WORK
+    public struct Single : IComparable, IFormattable, IConvertible
+        , IComparable<Single>, IEquatable<Single> 
+///     , IArithmetic<Single>
+#else
+    public struct Single : IComparable, IFormattable, IConvertible
+#endif
+    {
+        internal float m_value;
+
+        //
+        // Public constants
+        //
+        public const float MinValue = (float)-3.40282346638528859e+38;
+        public const float Epsilon = (float)1.4e-45;
+        public const float MaxValue = (float)3.40282346638528859e+38;
+        public const float PositiveInfinity = (float)1.0 / (float)0.0;
+        public const float NegativeInfinity = (float)-1.0 / (float)0.0;
+        public const float NaN = (float)0.0 / (float)0.0;
+
+        [Pure]
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public unsafe static bool IsInfinity(float f) {
+            return (*(int*)(&f) & 0x7FFFFFFF) == 0x7F800000;
+        }
+
+        [Pure]
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public unsafe static bool IsPositiveInfinity(float f) {
+            return *(int*)(&f) == 0x7F800000;
+        }
+
+        [Pure]
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public unsafe static bool IsNegativeInfinity(float f) {
+            return *(int*)(&f) == unchecked((int)0xFF800000);
+        }
+
+        [Pure]
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+        [System.Security.SecuritySafeCritical]
+        public unsafe static bool IsNaN(float f) {
+            return (*(int*)(&f) & 0x7FFFFFFF) > 0x7F800000;
+        }
+
+        // Compares this object to another object, returning an integer that
+        // indicates the relationship.
+        // Returns a value less than zero if this  object
+        // null is considered to be less than any instance.
+        // If object is not of type Single, this method throws an ArgumentException.
+        //
+        public int CompareTo(Object value) {
+            if (value == null) {
+                return 1;
+            }
+            if (value is Single) {
+                float f = (float)value;
+                if (m_value < f) return -1;
+                if (m_value > f) return 1;
+                if (m_value == f) return 0;
+
+                // At least one of the values is NaN.
+                if (IsNaN(m_value))
+                    return (IsNaN(f) ? 0 : -1);
+                else // f is NaN.
+                    return 1;
+            }
+            throw new ArgumentException (Environment.GetResourceString("Arg_MustBeSingle"));
+        }
+
+
+        public int CompareTo(Single value) {
+            if (m_value < value) return -1;
+            if (m_value > value) return 1;
+            if (m_value == value) return 0;
+
+            // At least one of the values is NaN.
+            if (IsNaN(m_value))
+                return (IsNaN(value) ? 0 : -1);
+            else // f is NaN.
+                return 1;
+        }
+
+        public static bool operator ==(Single left, Single right) {
+            return left == right;
+        }
+
+        public static bool operator !=(Single left, Single right) {
+            return left != right;
+        }
+
+        public static bool operator <(Single left, Single right) {
+            return left < right;
+        }
+
+        public static bool operator >(Single left, Single right) {
+            return left > right;
+        }
+
+        public static bool operator <=(Single left, Single right) {
+            return left <= right;
+        }
+
+        public static bool operator >=(Single left, Single right) {
+            return left >= right;
+        }
+
+        public override bool Equals(Object obj) {
+            if (!(obj is Single)) {
+                return false;
+            }
+            float temp = ((Single)obj).m_value;
+            if (temp == m_value) {
+                return true;
+            }
+
+            return IsNaN(temp) && IsNaN(m_value);
+        }
+
+        public bool Equals(Single obj)
+        {
+            if (obj == m_value) {
+                return true;
+            }
+
+            return IsNaN(obj) && IsNaN(m_value);
+        }
+
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public unsafe override int GetHashCode() {
+            float f = m_value;
+            if (f == 0) {
+                // Ensure that 0 and -0 have the same hash code
+                return 0;
+            }
+            int v = *(int*)(&f);
+            return v;
+        }
+
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public override String ToString() {
+            Contract.Ensures(Contract.Result<String>() != null);
+            return Number.FormatSingle(m_value, null, NumberFormatInfo.CurrentInfo);
+        }
+
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public String ToString(IFormatProvider provider) {
+            Contract.Ensures(Contract.Result<String>() != null);
+            return Number.FormatSingle(m_value, null, NumberFormatInfo.GetInstance(provider));
+        }
+
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public String ToString(String format) {
+            Contract.Ensures(Contract.Result<String>() != null);
+            return Number.FormatSingle(m_value, format, NumberFormatInfo.CurrentInfo);
+        }
+
+        [System.Security.SecuritySafeCritical]  // auto-generated
+        public String ToString(String format, IFormatProvider provider) {
+            Contract.Ensures(Contract.Result<String>() != null);
+            return Number.FormatSingle(m_value, format, NumberFormatInfo.GetInstance(provider));
+        }
+
+        // Parses a float from a String in the given style.  If
+        // a NumberFormatInfo isn't specified, the current culture's
+        // NumberFormatInfo is assumed.
+        //
+        // This method will not throw an OverflowException, but will return
+        // PositiveInfinity or NegativeInfinity for a number that is too
+        // large or too small.
+        //
+        public static float Parse(String s) {
+            return Parse(s, NumberStyles.Float | NumberStyles.AllowThousands, NumberFormatInfo.CurrentInfo);
+        }
+
+        public static float Parse(String s, NumberStyles style) {
+            NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
+            return Parse(s, style, NumberFormatInfo.CurrentInfo);
+        }
+
+        public static float Parse(String s, IFormatProvider provider) {
+            return Parse(s, NumberStyles.Float | NumberStyles.AllowThousands, NumberFormatInfo.GetInstance(provider));
+        }
+
+        public static float Parse(String s, NumberStyles style, IFormatProvider provider) {
+            NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
+            return Parse(s, style, NumberFormatInfo.GetInstance(provider));
+        }
+        
+        private static float Parse(String s, NumberStyles style, NumberFormatInfo info) {
+            return Number.ParseSingle(s, style, info);
+        }
+
+        public static Boolean TryParse(String s, out Single result) {
+            return TryParse(s, NumberStyles.Float | NumberStyles.AllowThousands, NumberFormatInfo.CurrentInfo, out result);
+        }
+
+        public static Boolean TryParse(String s, NumberStyles style, IFormatProvider provider, out Single result) {
+            NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
+            return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result);
+        }
+        
+        private static Boolean TryParse(String s, NumberStyles style, NumberFormatInfo info, out Single result) {
+            if (s == null) {
+                result = 0;
+                return false;
+            }
+            bool success = Number.TryParseSingle(s, style, info, out result);
+            if (!success) {
+                String sTrim = s.Trim();
+                if (sTrim.Equals(info.PositiveInfinitySymbol)) {
+                    result = PositiveInfinity;
+                } else if (sTrim.Equals(info.NegativeInfinitySymbol)) {
+                    result = NegativeInfinity;
+                } else if (sTrim.Equals(info.NaNSymbol)) {
+                    result = NaN;
+                } else
+                    return false; // We really failed
+            }
+            return true;
+
+        }
+
+        //
+        // IConvertible implementation
+        //
+
+        public TypeCode GetTypeCode() {
+            return TypeCode.Single;
+        }
+
+
+        /// <internalonly/>
+        bool IConvertible.ToBoolean(IFormatProvider provider) {
+            return Convert.ToBoolean(m_value);
+        }
+
+        /// <internalonly/>
+        char IConvertible.ToChar(IFormatProvider provider) {
+            throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "Single", "Char"));
+        }
+
+        /// <internalonly/>
+        sbyte IConvertible.ToSByte(IFormatProvider provider) {
+            return Convert.ToSByte(m_value);
+        }
+
+        /// <internalonly/>
+        byte IConvertible.ToByte(IFormatProvider provider) {
+            return Convert.ToByte(m_value);
+        }
+
+        /// <internalonly/>
+        short IConvertible.ToInt16(IFormatProvider provider) {
+            return Convert.ToInt16(m_value);
+        }
+
+        /// <internalonly/>
+        ushort IConvertible.ToUInt16(IFormatProvider provider) {
+            return Convert.ToUInt16(m_value);
+        }
+
+        /// <internalonly/>
+        int IConvertible.ToInt32(IFormatProvider provider) {
+            return Convert.ToInt32(m_value);
+        }
+
+        /// <internalonly/>
+        uint IConvertible.ToUInt32(IFormatProvider provider) {
+            return Convert.ToUInt32(m_value);
+        }
+
+        /// <internalonly/>
+        long IConvertible.ToInt64(IFormatProvider provider) {
+            return Convert.ToInt64(m_value);
+        }
+
+        /// <internalonly/>
+        ulong IConvertible.ToUInt64(IFormatProvider provider) {
+            return Convert.ToUInt64(m_value);
+        }
+
+        /// <internalonly/>
+        float IConvertible.ToSingle(IFormatProvider provider) {
+            return m_value;
+        }
+
+        /// <internalonly/>
+        double IConvertible.ToDouble(IFormatProvider provider) {
+            return Convert.ToDouble(m_value);
+        }
+
+        /// <internalonly/>
+        Decimal IConvertible.ToDecimal(IFormatProvider provider) {
+            return Convert.ToDecimal(m_value);
+        }
+
+        /// <internalonly/>
+        DateTime IConvertible.ToDateTime(IFormatProvider provider) {
+            throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "Single", "DateTime"));
+        }
+
+        /// <internalonly/>
+        Object IConvertible.ToType(Type type, IFormatProvider provider) {
+            return Convert.DefaultToType((IConvertible)this, type, provider);
+        }
+///#if GENERICS_WORK
+///        //
+///        // IArithmetic<Single> implementation
+///        //
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.AbsoluteValue(out bool overflowed) {
+///            Single abs = (m_value < 0 ? -m_value : m_value);
+///            overflowed = IsInfinity(abs) || IsNaN(abs);
+///            return abs;
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Negate(out bool overflowed) {
+///            Single neg= -m_value;
+///            overflowed = IsInfinity(neg) || IsNaN(neg);
+///            return neg;
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Sign(out bool overflowed) {
+///            overflowed = IsNaN(m_value);
+///            if (overflowed) {
+///                return m_value;
+///            }
+///            return (m_value >= 0 ? (m_value == 0 ? 0 : 1) : -1);
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Add(Single addend, out bool overflowed) {
+///            Single s = m_value + addend;
+///            overflowed = IsInfinity(s) || IsNaN(s);
+///            return s;
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Subtract(Single subtrahend, out bool overflowed) {
+///            Single s = m_value - subtrahend;
+///            overflowed = IsInfinity(s) || IsNaN(s);
+///            return s;
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Multiply(Single multiplier, out bool overflowed) {
+///            Single s = m_value * multiplier;
+///            overflowed = IsInfinity(s) || IsNaN(s);
+///            return s;
+///        }
+///
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Divide(Single divisor, out bool overflowed) {
+///            Single s = m_value / divisor;
+///            overflowed = IsInfinity(s) || IsNaN(s);
+///            return s;
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.DivideRemainder(Single divisor, out Single remainder, out bool overflowed) {
+///            remainder = m_value % divisor;
+///            Single s = m_value / divisor;
+///            overflowed = IsInfinity(s) || IsInfinity(remainder) || IsNaN(s) || IsNaN(remainder);
+///            return s;
+///        }
+///
+///        /// <internalonly/>
+///        Single IArithmetic<Single>.Remainder(Single divisor, out bool overflowed) {
+///            Single s = m_value % divisor;
+///            overflowed = IsInfinity(s) || IsNaN(s);
+///            return s;
+///        }
+///
+///        /// <internalonly/>
+///        ArithmeticDescriptor<Single> IArithmetic<Single>.GetDescriptor() {
+///            if (s_descriptor == null) {
+///                s_descriptor = new SingleArithmeticDescriptor( ArithmeticCapabilities.One
+///                                                             | ArithmeticCapabilities.Zero
+///                                                             | ArithmeticCapabilities.MaxValue
+///                                                             | ArithmeticCapabilities.MinValue
+///                                                             | ArithmeticCapabilities.PositiveInfinity
+///                                                             | ArithmeticCapabilities.NegativeInfinity);
+///            }
+///            return s_descriptor;
+///        }
+///
+///        private static SingleArithmeticDescriptor s_descriptor;
+/// 
+///        class SingleArithmeticDescriptor : ArithmeticDescriptor<Single> {
+///            public SingleArithmeticDescriptor(ArithmeticCapabilities capabilities) : base(capabilities) {}
+///            public override Single One {
+///                get {
+///                    return (Single) 1;
+///                }
+///            }
+///
+///            public override Single Zero {
+///                get {
+///                    return (Single) 0;
+///                }
+///            }
+///
+///            public override Single MinValue {
+///                get {
+///                    return Single.MinValue;
+///                }
+///            }
+///
+///            public override Single MaxValue {
+///                get {
+///                    return Single.MaxValue;
+///                }
+///            }
+///
+///            public override Single PositiveInfinity {
+///                get {
+///                    return Single.PositiveInfinity;
+///                }
+///            }
+///
+///            public override Single NegativeInfinity {
+///                get {
+///                    return Single.NegativeInfinity;
+///                }
+///            }
+///
+///        }
+///#endif // #if GENERICS_WORK
+    }
+}