Method CloneTo

source/script_object.cpp:174–219

Helper function for temporary implementation of Clone by Object and subclasses. Should be eliminated once revision of the object model is complete.

// Helper function for temporary implementation of Clone by Object and subclasses.
// Should be eliminated once revision of the object model is complete.
Object *Object::CloneTo(Object &obj)
{
	// Allocate space in destination object.
	auto field_count = mFields.Length();
	if (!obj.SetInternalCapacity(field_count))
	{
		obj.Release();
		return NULL;
	}

	int failure_count = 0; // See comment below.
	index_t i;

	obj.mFields.Length() = field_count;

	for (i = 0; i < field_count; ++i)
	{
		FieldType &dst = obj.mFields[i];
		FieldType &src = mFields[i];

		// Copy name.
		dst.key_c = src.key_c;
		if ( !(dst.name = _tcsdup(src.name)) )
		{
			// Rather than trying to set up the object so that what we have
			// so far is valid in order to break out of the loop, continue,
			// make all fields valid and then allow them to be freed. 
			++failure_count;
		}

		// Copy value.
		if (!dst.InitCopy(src))
			++failure_count;
	}
	if (failure_count)
	{
		// One or more memory allocations failed.  It seems best to return a clear failure
		// indication rather than an incomplete copy.  Now that the loop above has finished,
		// the object's contents are at least valid and it is safe to free the object:
		obj.Release();
		return NULL;
	}
	if (mBase)
		obj.SetBase(mBase);
	return &obj;
}

Map *Map::CloneTo(Map &obj)
{