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authororwell96 <orwell@bleipb.de>2020-12-21 20:04:33 +0100
committerorwell96 <orwell@bleipb.de>2021-01-12 13:27:00 +0100
commite42fbf9dcc2697ebda1a8fdd9cbedecbee92a6bb (patch)
tree97bf023b3fbf462b5ac587fb4d724b23a0e893f8 /assets/manual_img/Bildschirmfoto_2016-09-17_09-48-54.png
parentd0bd4ac30e8f14d40df01a91e346e7c2c589e0a9 (diff)
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Make advtrains use serialize_lib (save version 4)
Old save format will be gracefully migrated
Diffstat (limited to 'assets/manual_img/Bildschirmfoto_2016-09-17_09-48-54.png')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 22:28:19 +0000
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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "rollback_interface.h"
#include <sstream>
#include "util/serialize.h"
#include "util/string.h"
#include "util/numeric.h"
#include "util/basic_macros.h"
#include "map.h"
#include "gamedef.h"
#include "nodedef.h"
#include "nodemetadata.h"
#include "exceptions.h"
#include "log.h"
#include "inventorymanager.h"
#include "inventory.h"
#include "mapblock.h"


RollbackNode::RollbackNode(Map *map, v3s16 p, IGameDef *gamedef)
{
	INodeDefManager *ndef = gamedef->ndef();
	MapNode n = map->getNodeNoEx(p);
	name = ndef->get(n).name;
	param1 = n.param1;
	param2 = n.param2;
	NodeMetadata *metap = map->getNodeMetadata(p);
	if (metap) {
		std::ostringstream os(std::ios::binary);
		metap->serialize(os, 1); // FIXME: version bump??
		meta = os.str();
	}
}


std::string RollbackAction::toString() const
{
	std::ostringstream os(std::ios::binary);
	switch (type) {
	case TYPE_SET_NODE:
		os << "set_node " << PP(p);
		os << ": (" << serializeJsonString(n_old.name);
		os << ", " << itos(n_old.param1);
		os << ", " << itos(n_old.param2);
		os << ", " << serializeJsonString(n_old.meta);
		os << ") -> (" << serializeJsonString(n_new.name);
		os << ", " << itos(n_new.param1);
		os << ", " << itos(n_new.param2);
		os << ", " << serializeJsonString(n_new.meta);
		os << ')';
	case TYPE_MODIFY_INVENTORY_STACK:
		os << "modify_inventory_stack (";
		os << serializeJsonString(inventory_location);
		os << ", " << serializeJsonString(inventory_list);
		os << ", " << inventory_index;
		os << ", " << (inventory_add ? "add" : "remove");
		os << ", " << serializeJsonString(inventory_stack.getItemString());
		os << ')';
	default:
		return "<unknown action>";
	}
	return os.str();
}


bool RollbackAction::isImportant(IGameDef *gamedef) const
{
	if (type != TYPE_SET_NODE)
		return true;
	// If names differ, action is always important
	if(n_old.name != n_new.name)
		return true;
	// If metadata differs, action is always important
	if(n_old.meta != n_new.meta)
		return true;
	INodeDefManager *ndef = gamedef->ndef();
	// Both are of the same name, so a single definition is needed
	const ContentFeatures &def = ndef->get(n_old.name);
	// If the type is flowing liquid, action is not important
	if (def.liquid_type == LIQUID_FLOWING)
		return false;
	// Otherwise action is important
	return true;
}


bool RollbackAction::getPosition(v3s16 *dst) const
{
	switch (type) {
	case TYPE_SET_NODE:
		if (dst) *dst = p;
		return true;
	case TYPE_MODIFY_INVENTORY_STACK: {
		InventoryLocation loc;
		loc.deSerialize(inventory_location);
		if (loc.type != InventoryLocation::NODEMETA) {
			return false;
		}
		if (dst) *dst = loc.p;
		return true; }
	default:
		return false;
	}
}


bool RollbackAction::applyRevert(Map *map, InventoryManager *imgr, IGameDef *gamedef) const
{
	try {
		switch (type) {
		case TYPE_NOTHING:
			return true;
		case TYPE_SET_NODE: {
			INodeDefManager *ndef = gamedef->ndef();
			// Make sure position is loaded from disk
			map->emergeBlock(getContainerPos(p, MAP_BLOCKSIZE), false);
			// Check current node
			MapNode current_node = map->getNodeNoEx(p);
			std::string current_name = ndef->get(current_node).name;
			// If current node not the new node, it's bad
			if (current_name != n_new.name) {
				return false;
			}
			// Create rollback node
			MapNode n(ndef, n_old.name, n_old.param1, n_old.param2);
			// Set rollback node
			try {
				if (!map->addNodeWithEvent(p, n)) {
					infostream << "RollbackAction::applyRevert(): "
						<< "AddNodeWithEvent failed at "
						<< PP(p) << " for " << n_old.name
						<< std::endl;
					return false;
				}
				if (n_old.meta.empty()) {
					map->removeNodeMetadata(p);
				} else {