private static void EmitConvertValueChecked(GroboIL il, Type from, Type to)
{
var fromTypeCode = Type.GetTypeCode(from);
var toTypeCode = Type.GetTypeCode(to);
switch (fromTypeCode)
{
case TypeCode.DBNull:
case TypeCode.DateTime:
case TypeCode.Decimal:
case TypeCode.Empty:
case TypeCode.Object:
case TypeCode.String:
throw new NotSupportedException("Cast from type '" + from + "' to type '" + to + "' is not supported");
}
if (toTypeCode == fromTypeCode)
{
return;
}
switch (toTypeCode)
{
case TypeCode.SByte:
il.Conv_Ovf <sbyte>(from.Unsigned());
break;
case TypeCode.Byte:
case TypeCode.Boolean:
il.Conv_Ovf <byte>(from.Unsigned());
break;
case TypeCode.Int16:
il.Conv_Ovf <short>(from.Unsigned());
break;
case TypeCode.UInt16:
il.Conv_Ovf <ushort>(from.Unsigned());
break;
case TypeCode.Int32:
if (fromTypeCode == TypeCode.UInt32 || fromTypeCode == TypeCode.Int64 || fromTypeCode == TypeCode.UInt64 ||
fromTypeCode == TypeCode.Double || fromTypeCode == TypeCode.Single /* || fromTypeCode == TypeCode.DateTime*/)
{
il.Conv_Ovf <int>(from.Unsigned());
}
break;
case TypeCode.UInt32:
if (fromTypeCode == TypeCode.SByte || fromTypeCode == TypeCode.Int16 || fromTypeCode == TypeCode.Int32 || fromTypeCode == TypeCode.Int64 ||
fromTypeCode == TypeCode.UInt64 || fromTypeCode == TypeCode.Double || fromTypeCode == TypeCode.Single /* || fromTypeCode == TypeCode.DateTime*/)
{
il.Conv_Ovf <uint>(from.Unsigned());
}
break;
case TypeCode.Int64:
switch (fromTypeCode)
{
case TypeCode.Double:
case TypeCode.Single:
case TypeCode.UInt64:
il.Conv_Ovf <long>(from.Unsigned());
break;
case TypeCode.UInt32:
case TypeCode.Char:
case TypeCode.UInt16:
case TypeCode.Byte:
il.Conv <ulong>();
break;
default:
il.Conv <long>();
break;
}
break;
case TypeCode.UInt64:
switch (fromTypeCode)
{
case TypeCode.Double:
case TypeCode.Single:
case TypeCode.Int64:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.Int32:
il.Conv_Ovf <ulong>(from.Unsigned());
break;
case TypeCode.UInt32:
case TypeCode.Char:
case TypeCode.UInt16:
case TypeCode.Byte:
il.Conv <ulong>();
break;
}
break;
case TypeCode.Single:
if (fromTypeCode == TypeCode.UInt64 || fromTypeCode == TypeCode.UInt32)
{
il.Conv_R_Un();
}
il.Conv <float>();
break;
case TypeCode.Double:
if (fromTypeCode == TypeCode.UInt64 || fromTypeCode == TypeCode.UInt32)
{
il.Conv_R_Un();
}
il.Conv <double>();
break;
default:
throw new NotSupportedException("Type with type code '" + toTypeCode + "' is not supported");
}
}