Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Int16.cs / 1 / Int16.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: Int16.cs ** ** ** Purpose: This class will encapsulate a short and provide an ** Object representation of it. ** ** ===========================================================*/ namespace System { using System; using System.Globalization; using System.Runtime.InteropServices; [System.Runtime.InteropServices.ComVisible(true)] [Serializable, System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)] public struct Int16 : IComparable, IFormattable, IConvertible #if GENERICS_WORK , IComparable, IEquatable #endif { internal short m_value; public const short MaxValue = (short)0x7FFF; public const short MinValue = unchecked((short)0x8000); // 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 Int16, this method throws an ArgumentException. // public int CompareTo(Object value) { if (value == null) { return 1; } if (value is Int16) { return m_value - ((Int16)value).m_value; } throw new ArgumentException(Environment.GetResourceString("Arg_MustBeInt16")); } public int CompareTo(Int16 value) { return m_value - value; } public override bool Equals(Object obj) { if (!(obj is Int16)) { return false; } return m_value == ((Int16)obj).m_value; } public bool Equals(Int16 obj) { return m_value == obj; } // Returns a HashCode for the Int16 public override int GetHashCode() { return ((int)((ushort)m_value) | (((int)m_value) << 16)); } public override String ToString() { return Number.FormatInt32(m_value, null, NumberFormatInfo.CurrentInfo); } public String ToString(IFormatProvider provider) { return Number.FormatInt32(m_value, null, NumberFormatInfo.GetInstance(provider)); } public String ToString(String format) { return ToString(format, NumberFormatInfo.CurrentInfo); } public String ToString(String format, IFormatProvider provider) { return ToString(format, NumberFormatInfo.GetInstance(provider)); } private String ToString(String format, NumberFormatInfo info) { if (m_value<0 && format!=null && format.Length>0 && (format[0]=='X' || format[0]=='x')) { uint temp = (uint)(m_value & 0x0000FFFF); return Number.FormatUInt32(temp,format, info); } return Number.FormatInt32(m_value, format, info); } public static short Parse(String s) { return Parse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo); } public static short Parse(String s, NumberStyles style) { NumberFormatInfo.ValidateParseStyleInteger(style); return Parse(s, style, NumberFormatInfo.CurrentInfo); } public static short Parse(String s, IFormatProvider provider) { return Parse(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider)); } public static short Parse(String s, NumberStyles style, IFormatProvider provider) { NumberFormatInfo.ValidateParseStyleInteger(style); return Parse(s, style, NumberFormatInfo.GetInstance(provider)); } private static short Parse(String s, NumberStyles style, NumberFormatInfo info) { int i = 0; try { i = Number.ParseInt32(s, style, info); } catch(OverflowException e) { throw new OverflowException(Environment.GetResourceString("Overflow_Int16"), e); } // We need this check here since we don't allow signs to specified in hex numbers. So we fixup the result // for negative numbers if ((style & NumberStyles.AllowHexSpecifier) != 0) { // We are parsing a hexadecimal number if ((i < 0) || (i > UInt16.MaxValue)) { throw new OverflowException(Environment.GetResourceString("Overflow_Int16")); } return (short)i; } if (i < MinValue || i > MaxValue) throw new OverflowException(Environment.GetResourceString("Overflow_Int16")); return (short)i; } public static bool TryParse(String s, out Int16 result) { return TryParse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result); } public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out Int16 result) { NumberFormatInfo.ValidateParseStyleInteger(style); return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result); } private static bool TryParse(String s, NumberStyles style, NumberFormatInfo info, out Int16 result) { result = 0; int i; if (!Number.TryParseInt32(s, style, info, out i)) { return false; } // We need this check here since we don't allow signs to specified in hex numbers. So we fixup the result // for negative numbers if ((style & NumberStyles.AllowHexSpecifier) != 0) { // We are parsing a hexadecimal number if ((i < 0) || i > UInt16.MaxValue) { return false; } result = (Int16) i; return true; } if (i < MinValue || i > MaxValue) { return false; } result = (Int16) i; return true; } // // IValue implementation // public TypeCode GetTypeCode() { return TypeCode.Int16; } /// bool IConvertible.ToBoolean(IFormatProvider provider) { return Convert.ToBoolean(m_value); } /// char IConvertible.ToChar(IFormatProvider provider) { return Convert.ToChar(m_value); } /// sbyte IConvertible.ToSByte(IFormatProvider provider) { return Convert.ToSByte(m_value); } /// byte IConvertible.ToByte(IFormatProvider provider) { return Convert.ToByte(m_value); } /// short IConvertible.ToInt16(IFormatProvider provider) { return m_value; } /// ushort IConvertible.ToUInt16(IFormatProvider provider) { return Convert.ToUInt16(m_value); } /// int IConvertible.ToInt32(IFormatProvider provider) { return Convert.ToInt32(m_value); } /// uint IConvertible.ToUInt32(IFormatProvider provider) { return Convert.ToUInt32(m_value); } /// long IConvertible.ToInt64(IFormatProvider provider) { return Convert.ToInt64(m_value); } /// ulong IConvertible.ToUInt64(IFormatProvider provider) { return Convert.ToUInt64(m_value); } /// float IConvertible.ToSingle(IFormatProvider provider) { return Convert.ToSingle(m_value); } /// double IConvertible.ToDouble(IFormatProvider provider) { return Convert.ToDouble(m_value); } /// Decimal IConvertible.ToDecimal(IFormatProvider provider) { return Convert.ToDecimal(m_value); } /// DateTime IConvertible.ToDateTime(IFormatProvider provider) { throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Int16", "DateTime")); } /// Object IConvertible.ToType(Type type, IFormatProvider provider) { return Convert.DefaultToType((IConvertible)this, type, provider); } } }
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