Int16.cs source code in C# .NET

Source code for the .NET framework in C#

                        
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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