Reorganized core/ directory, it was too fatty already

-Removed FuncRef, since Callable makes it obsolete
-Removed int_types.h as its obsolete in c++11+
-Changed color names code

core/object/reference.cpp

@@ -0,0 +1,132 @@
+/*************************************************************************/
+/*  reference.cpp                                                        */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "reference.h"
+
+#include "core/object/script_language.h"
+
+bool Reference::init_ref() {
+	if (reference()) {
+		if (!is_referenced() && refcount_init.unref()) {
+			unreference(); // first referencing is already 1, so compensate for the ref above
+		}
+
+		return true;
+	} else {
+		return false;
+	}
+}
+
+void Reference::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("init_ref"), &Reference::init_ref);
+	ClassDB::bind_method(D_METHOD("reference"), &Reference::reference);
+	ClassDB::bind_method(D_METHOD("unreference"), &Reference::unreference);
+}
+
+int Reference::reference_get_count() const {
+	return refcount.get();
+}
+
+bool Reference::reference() {
+	uint32_t rc_val = refcount.refval();
+	bool success = rc_val != 0;
+
+	if (success && rc_val <= 2 /* higher is not relevant */) {
+		if (get_script_instance()) {
+			get_script_instance()->refcount_incremented();
+		}
+		if (instance_binding_count > 0 && !ScriptServer::are_languages_finished()) {
+			for (int i = 0; i < MAX_SCRIPT_INSTANCE_BINDINGS; i++) {
+				if (_script_instance_bindings[i]) {
+					ScriptServer::get_language(i)->refcount_incremented_instance_binding(this);
+				}
+			}
+		}
+	}
+
+	return success;
+}
+
+bool Reference::unreference() {
+	uint32_t rc_val = refcount.unrefval();
+	bool die = rc_val == 0;
+
+	if (rc_val <= 1 /* higher is not relevant */) {
+		if (get_script_instance()) {
+			bool script_ret = get_script_instance()->refcount_decremented();
+			die = die && script_ret;
+		}
+		if (instance_binding_count > 0 && !ScriptServer::are_languages_finished()) {
+			for (int i = 0; i < MAX_SCRIPT_INSTANCE_BINDINGS; i++) {
+				if (_script_instance_bindings[i]) {
+					bool script_ret = ScriptServer::get_language(i)->refcount_decremented_instance_binding(this);
+					die = die && script_ret;
+				}
+			}
+		}
+	}
+
+	return die;
+}
+
+Reference::Reference() :
+		Object(true) {
+	refcount.init();
+	refcount_init.init();
+}
+
+Variant WeakRef::get_ref() const {
+	if (ref.is_null()) {
+		return Variant();
+	}
+
+	Object *obj = ObjectDB::get_instance(ref);
+	if (!obj) {
+		return Variant();
+	}
+	Reference *r = cast_to<Reference>(obj);
+	if (r) {
+		return REF(r);
+	}
+
+	return obj;
+}
+
+void WeakRef::set_obj(Object *p_object) {
+	ref = p_object ? p_object->get_instance_id() : ObjectID();
+}
+
+void WeakRef::set_ref(const REF &p_ref) {
+	ref = p_ref.is_valid() ? p_ref->get_instance_id() : ObjectID();
+}
+
+void WeakRef::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("get_ref"), &WeakRef::get_ref);
+}