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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*============================================================
**
**
** Purpose: This class will encapsulate a short and provide an
** Object representation of it.
**
**
===========================================================*/
using System.Globalization;
using System;
using System.Runtime.InteropServices;
using System.Diagnostics.Contracts;
namespace System
{
// Wrapper for unsigned 16 bit integers.
[Serializable]
[CLSCompliant(false), System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
public struct UInt16 : IComparable, IFormattable, IConvertible
, IComparable<UInt16>, IEquatable<UInt16>
{
private ushort m_value;
public const ushort MaxValue = (ushort)0xFFFF;
public const ushort MinValue = 0;
// 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 UInt16, this method throws an ArgumentException.
//
public int CompareTo(Object value)
{
if (value == null)
{
return 1;
}
if (value is UInt16)
{
return ((int)m_value - (int)(((UInt16)value).m_value));
}
throw new ArgumentException(SR.Arg_MustBeUInt16);
}
public int CompareTo(UInt16 value)
{
return ((int)m_value - (int)value);
}
public override bool Equals(Object obj)
{
if (!(obj is UInt16))
{
return false;
}
return m_value == ((UInt16)obj).m_value;
}
[System.Runtime.Versioning.NonVersionable]
public bool Equals(UInt16 obj)
{
return m_value == obj;
}
// Returns a HashCode for the UInt16
public override int GetHashCode()
{
return (int)m_value;
}
// Converts the current value to a String in base-10 with no extra padding.
public override String ToString()
{
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatUInt32(m_value, null, NumberFormatInfo.CurrentInfo);
}
public String ToString(IFormatProvider provider)
{
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatUInt32(m_value, null, NumberFormatInfo.GetInstance(provider));
}
public String ToString(String format)
{
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatUInt32(m_value, format, NumberFormatInfo.CurrentInfo);
}
public String ToString(String format, IFormatProvider provider)
{
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatUInt32(m_value, format, NumberFormatInfo.GetInstance(provider));
}
[CLSCompliant(false)]
public static ushort Parse(String s)
{
return Parse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo);
}
[CLSCompliant(false)]
public static ushort Parse(String s, NumberStyles style)
{
NumberFormatInfo.ValidateParseStyleInteger(style);
return Parse(s, style, NumberFormatInfo.CurrentInfo);
}
[CLSCompliant(false)]
public static ushort Parse(String s, IFormatProvider provider)
{
return Parse(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
}
[CLSCompliant(false)]
public static ushort Parse(String s, NumberStyles style, IFormatProvider provider)
{
NumberFormatInfo.ValidateParseStyleInteger(style);
return Parse(s, style, NumberFormatInfo.GetInstance(provider));
}
private static ushort Parse(String s, NumberStyles style, NumberFormatInfo info)
{
uint i = 0;
try
{
i = Number.ParseUInt32(s, style, info);
}
catch (OverflowException e)
{
throw new OverflowException(SR.Overflow_UInt16, e);
}
if (i > MaxValue) throw new OverflowException(SR.Overflow_UInt16);
return (ushort)i;
}
[CLSCompliant(false)]
public static bool TryParse(String s, out UInt16 result)
{
return TryParse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
}
[CLSCompliant(false)]
public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out UInt16 result)
{
NumberFormatInfo.ValidateParseStyleInteger(style);
return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result);
}
private static bool TryParse(String s, NumberStyles style, NumberFormatInfo info, out UInt16 result)
{
result = 0;
UInt32 i;
if (!Number.TryParseUInt32(s, style, info, out i))
{
return false;
}
if (i > MaxValue)
{
return false;
}
result = (UInt16)i;
return true;
}
//
// IConvertible implementation
//
public TypeCode GetTypeCode()
{
return TypeCode.UInt16;
}
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 Convert.ToInt16(m_value);
}
ushort IConvertible.ToUInt16(IFormatProvider provider)
{
return 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(SR.Format(SR.InvalidCast_FromTo, "UInt16", "DateTime"));
}
Object IConvertible.ToType(Type type, IFormatProvider provider)
{
return Convert.DefaultToType((IConvertible)this, type, provider);
}
}
}
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