public static unsafe object?GetValue(MetadataImport scope, int token, RuntimeTypeHandle fieldTypeHandle, bool raw)
{
CorElementType corElementType = 0;
long buffer = 0;
int length;
string? stringVal;
stringVal = scope.GetDefaultValue(token, out buffer, out length, out corElementType);
RuntimeType fieldType = fieldTypeHandle.GetRuntimeType();
if (fieldType.IsEnum && raw == false)
{
// NOTE: Unlike in `TypeBuilder.SetConstantValue`, if `fieldType` describes
// a nullable enum type `Nullable<TEnum>`, we do not unpack it to `TEnum` to
// successfully enter this `if` clause. Default values of `TEnum?`-typed
// parameters have been reported as values of the underlying type, changing
// this now might be a breaking change.
long defaultValue = 0;
switch (corElementType)
{
#region Switch
case CorElementType.ELEMENT_TYPE_VOID:
return(DBNull.Value);
case CorElementType.ELEMENT_TYPE_CHAR:
defaultValue = *(char *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I1:
defaultValue = *(sbyte *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_U1:
defaultValue = *(byte *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I2:
defaultValue = *(short *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_U2:
defaultValue = *(ushort *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I4:
defaultValue = *(int *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_U4:
defaultValue = *(uint *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_U8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_CLASS:
return(null);
default:
throw new FormatException(SR.Arg_BadLiteralFormat);
#endregion
}
return(RuntimeType.CreateEnum(fieldType, defaultValue));
}
else if (fieldType == typeof(DateTime))
{
long defaultValue = 0;
switch (corElementType)
{
#region Switch
case CorElementType.ELEMENT_TYPE_VOID:
return(DBNull.Value);
case CorElementType.ELEMENT_TYPE_I8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_U8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_CLASS:
return(null);
default:
throw new FormatException(SR.Arg_BadLiteralFormat);
#endregion
}
return(new DateTime(defaultValue));
}
else
{
switch (corElementType)
{
#region Switch
case CorElementType.ELEMENT_TYPE_VOID:
return(DBNull.Value);
case CorElementType.ELEMENT_TYPE_CHAR:
return(*(char *)&buffer);
case CorElementType.ELEMENT_TYPE_I1:
return(*(sbyte *)&buffer);
case CorElementType.ELEMENT_TYPE_U1:
return(*(byte *)&buffer);
case CorElementType.ELEMENT_TYPE_I2:
return(*(short *)&buffer);
case CorElementType.ELEMENT_TYPE_U2:
return(*(ushort *)&buffer);
case CorElementType.ELEMENT_TYPE_I4:
return(*(int *)&buffer);
case CorElementType.ELEMENT_TYPE_U4:
return(*(uint *)&buffer);
case CorElementType.ELEMENT_TYPE_I8:
return(buffer);
case CorElementType.ELEMENT_TYPE_U8:
return((ulong)buffer);
case CorElementType.ELEMENT_TYPE_BOOLEAN:
// The boolean value returned from the metadata engine is stored as a
// BOOL, which actually maps to an int. We need to read it out as an int
// to avoid problems on big-endian machines.
return(*(int *)&buffer != 0);
case CorElementType.ELEMENT_TYPE_R4:
return(*(float *)&buffer);
case CorElementType.ELEMENT_TYPE_R8:
return(*(double *)&buffer);
case CorElementType.ELEMENT_TYPE_STRING:
// A string constant can be empty but never null.
// A nullref constant can only be type CorElementType.ELEMENT_TYPE_CLASS.
return(stringVal == null ? string.Empty : stringVal);
case CorElementType.ELEMENT_TYPE_CLASS:
return(null);
default:
throw new FormatException(SR.Arg_BadLiteralFormat);
#endregion
}
}
}
public static unsafe object?GetValue(MetadataImport scope, int token, RuntimeTypeHandle fieldTypeHandle, bool raw)
{
CorElementType corElementType = 0;
long buffer = 0;
int length;
string? stringVal = scope.GetDefaultValue(token, out buffer, out length, out corElementType);
RuntimeType fieldType = fieldTypeHandle.GetRuntimeType();
if (fieldType.IsEnum && !raw)
{
// NOTE: Unlike in `TypeBuilder.SetConstantValue`, if `fieldType` describes
// a nullable enum type `Nullable<TEnum>`, we do not unpack it to `TEnum` to
// successfully enter this `if` clause. Default values of `TEnum?`-typed
// parameters have been reported as values of the underlying type, changing
// this now might be a breaking change.
long defaultValue = 0;
switch (corElementType)
{
#region Switch
case CorElementType.ELEMENT_TYPE_VOID:
return(DBNull.Value);
case CorElementType.ELEMENT_TYPE_CHAR:
defaultValue = *(char *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I1:
defaultValue = *(sbyte *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_U1:
defaultValue = *(byte *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I2:
defaultValue = *(short *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_U2:
defaultValue = *(ushort *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I4:
defaultValue = *(int *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_U4:
defaultValue = *(uint *)&buffer;
break;
case CorElementType.ELEMENT_TYPE_I8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_U8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_CLASS:
return(null);
default:
throw new FormatException(SR.Arg_BadLiteralFormat);
#endregion
}
return(RuntimeType.CreateEnum(fieldType, defaultValue));
}
else if (fieldType == typeof(DateTime))
{
long defaultValue = 0;
switch (corElementType)
{
#region Switch
case CorElementType.ELEMENT_TYPE_VOID:
return(DBNull.Value);
case CorElementType.ELEMENT_TYPE_I8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_U8:
defaultValue = buffer;
break;
case CorElementType.ELEMENT_TYPE_CLASS:
return(null);
default:
throw new FormatException(SR.Arg_BadLiteralFormat);
#endregion
}
return(new DateTime(defaultValue));
}
else
{
return(corElementType switch
{
CorElementType.ELEMENT_TYPE_VOID => DBNull.Value,
CorElementType.ELEMENT_TYPE_CHAR => *(char *)&buffer,
CorElementType.ELEMENT_TYPE_I1 => *(sbyte *)&buffer,
CorElementType.ELEMENT_TYPE_U1 => *(byte *)&buffer,
CorElementType.ELEMENT_TYPE_I2 => *(short *)&buffer,
CorElementType.ELEMENT_TYPE_U2 => *(ushort *)&buffer,
CorElementType.ELEMENT_TYPE_I4 => *(int *)&buffer,
CorElementType.ELEMENT_TYPE_U4 => *(uint *)&buffer,
CorElementType.ELEMENT_TYPE_I8 => buffer,
CorElementType.ELEMENT_TYPE_U8 => (ulong)buffer,
CorElementType.ELEMENT_TYPE_BOOLEAN => (*(int *)&buffer != 0),
CorElementType.ELEMENT_TYPE_R4 => *(float *)&buffer,
CorElementType.ELEMENT_TYPE_R8 => *(double *)&buffer,
CorElementType.ELEMENT_TYPE_STRING => stringVal ?? string.Empty,
CorElementType.ELEMENT_TYPE_CLASS => null,
_ => throw new FormatException(SR.Arg_BadLiteralFormat),
});
