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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.
// Note: If you add a new ctor overloads you need to update ParameterInfo.RawDefaultValue
using System.Reflection;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.Collections.Generic;
namespace System.Runtime.CompilerServices
{
[Serializable]
[AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter, Inherited = false)]
public sealed class DecimalConstantAttribute : Attribute
{
[CLSCompliant(false)]
public DecimalConstantAttribute(
byte scale,
byte sign,
uint hi,
uint mid,
uint low
)
{
dec = new System.Decimal((int)low, (int)mid, (int)hi, (sign != 0), scale);
}
public DecimalConstantAttribute(
byte scale,
byte sign,
int hi,
int mid,
int low
)
{
dec = new System.Decimal(low, mid, hi, (sign != 0), scale);
}
public System.Decimal Value
{
get
{
return dec;
}
}
internal static Decimal GetRawDecimalConstant(CustomAttributeData attr)
{
Contract.Requires(attr.Constructor.DeclaringType == typeof(DecimalConstantAttribute));
foreach (CustomAttributeNamedArgument namedArgument in attr.NamedArguments)
{
if (namedArgument.MemberInfo.Name.Equals("Value"))
{
// This is not possible because Decimal cannot be represented directly in the metadata.
Debug.Assert(false, "Decimal cannot be represented directly in the metadata.");
return (Decimal)namedArgument.TypedValue.Value;
}
}
ParameterInfo[] parameters = attr.Constructor.GetParameters();
Debug.Assert(parameters.Length == 5);
System.Collections.Generic.IList<CustomAttributeTypedArgument> args = attr.ConstructorArguments;
Debug.Assert(args.Count == 5);
if (parameters[2].ParameterType == typeof(uint))
{
// DecimalConstantAttribute(byte scale, byte sign, uint hi, uint mid, uint low)
int low = (int)(UInt32)args[4].Value;
int mid = (int)(UInt32)args[3].Value;
int hi = (int)(UInt32)args[2].Value;
byte sign = (byte)args[1].Value;
byte scale = (byte)args[0].Value;
return new System.Decimal(low, mid, hi, (sign != 0), scale);
}
else
{
// DecimalConstantAttribute(byte scale, byte sign, int hi, int mid, int low)
int low = (int)args[4].Value;
int mid = (int)args[3].Value;
int hi = (int)args[2].Value;
byte sign = (byte)args[1].Value;
byte scale = (byte)args[0].Value;
return new System.Decimal(low, mid, hi, (sign != 0), scale);
}
}
private System.Decimal dec;
}
}
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