Cosmos/source2/IL2PCU/Cosmos.IL2CPU/ILOp.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Cosmos.IL2CPU
{
    public abstract class ILOp
    {
        protected readonly Assembler Assembler;
        protected ILOp( Assembler aAsmblr )
        {
            Assembler = aAsmblr;
        }

        // This is called execute and not assemble, as the scanner
        // could be used for other things, profiling, analysis, reporting, etc
        public abstract void Execute( MethodInfo aMethod, ILOpCode aOpCode );

    protected static uint SizeOfType(Type aType)
		{
			if (aType.FullName == "System.Void")
			{
				return 0;
			}
			else if ((!aType.IsValueType && aType.IsClass) || aType.IsInterface)
			{
				return 4;
			}
			switch (aType.FullName)
			{
				case "System.Char":
					return 2;
				case "System.Byte":
				case "System.SByte":
					return 1;
				case "System.UInt16":
				case "System.Int16":
					return 2;
				case "System.UInt32":
				case "System.Int32":
					return 4;
				case "System.UInt64":
				case "System.Int64":
					return 8;
				//TODO: for now hardcode IntPtr and UIntPtr to be 32-bit
				case "System.UIntPtr":
				case "System.IntPtr":
					return 4;
				case "System.Boolean":
					return 1;
				case "System.Single":
					return 4;
				case "System.Double":
					return 8;
				case "System.Decimal":
					return 16;
				case "System.Guid":
					return 16;
				case "System.Enum":
					return 4;
				case "System.DateTime":
					return 8;
			}
			if (aType.FullName != null && aType.FullName.EndsWith("*"))
			{
				// pointer
				return 4;
			}
			// array
			//TypeSpecification xTypeSpec = aType as TypeSpecification;
			//if (xTypeSpec != null) {
			//    return 4;
			//}
			if (aType.IsEnum)
			{
        return SizeOfType(aType.GetField("value__").FieldType);
			}
			if (aType.IsValueType)
			{
				var xSla = aType.StructLayoutAttribute;
				if (xSla != null)
				{
					if (xSla.Size > 0)
					{
						return (uint)xSla.Size;
					}
				}
			}
			uint xResult;
			//GetTypeFieldInfo(aType,  out xResult);
			throw new Exception("TODO");
			return xResult;
		}
    }
}