3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 #include "database-leveldb.h"
29 #include "leveldb/db.h"
32 #include "mapsector.h"
34 #include "serialization.h"
39 #define ENSURE_STATUS_OK(s) \
41 throw FileNotGoodException(std::string("LevelDB error: ") + s.ToString()); \
44 Database_LevelDB::Database_LevelDB(ServerMap *map, std::string savedir)
46 leveldb::Options options;
47 options.create_if_missing = true;
48 leveldb::Status status = leveldb::DB::Open(options, savedir + DIR_DELIM + "map.db", &m_database);
49 ENSURE_STATUS_OK(status);
53 int Database_LevelDB::Initialized(void)
58 void Database_LevelDB::beginSave() {}
59 void Database_LevelDB::endSave() {}
61 void Database_LevelDB::saveBlock(MapBlock *block)
63 DSTACK(__FUNCTION_NAME);
65 Dummy blocks are not written
72 // Format used for writing
73 u8 version = SER_FMT_VER_HIGHEST_WRITE;
75 v3s16 p3d = block->getPos();
78 [0] u8 serialization version
82 std::ostringstream o(std::ios_base::binary);
83 o.write((char*)&version, 1);
85 block->serialize(o, version, true);
86 // Write block to database
87 std::string tmp = o.str();
89 leveldb::Status status = m_database->Put(leveldb::WriteOptions(), i64tos(getBlockAsInteger(p3d)), tmp);
90 ENSURE_STATUS_OK(status);
92 // We just wrote it to the disk so clear modified flag
93 block->resetModified();
96 MapBlock* Database_LevelDB::loadBlock(v3s16 blockpos)
98 v2s16 p2d(blockpos.X, blockpos.Z);
101 leveldb::Status status = m_database->Get(leveldb::ReadOptions(),
102 i64tos(getBlockAsInteger(blockpos)), &datastr);
103 if (datastr.length() == 0 && status.ok()) {
104 errorstream << "Blank block data in database (datastr.length() == 0) ("
105 << blockpos.X << "," << blockpos.Y << "," << blockpos.Z << ")" << std::endl;
107 if (g_settings->getBool("ignore_world_load_errors")) {
108 errorstream << "Ignoring block load error. Duck and cover! "
109 << "(ignore_world_load_errors)" << std::endl;
111 throw SerializationError("Blank block data in database");
117 Make sure sector is loaded
119 MapSector *sector = srvmap->createSector(p2d);
122 std::istringstream is(datastr, std::ios_base::binary);
123 u8 version = SER_FMT_VER_INVALID;
124 is.read((char *)&version, 1);
127 throw SerializationError("ServerMap::loadBlock(): Failed"
128 " to read MapBlock version");
130 MapBlock *block = NULL;
131 bool created_new = false;
132 block = sector->getBlockNoCreateNoEx(blockpos.Y);
135 block = sector->createBlankBlockNoInsert(blockpos.Y);
140 block->deSerialize(is, version, true);
142 // If it's a new block, insert it to the map
144 sector->insertBlock(block);
147 Save blocks loaded in old format in new format
149 //if(version < SER_FMT_VER_HIGHEST || save_after_load)
150 // Only save if asked to; no need to update version
151 //if(save_after_load)
153 // We just loaded it from, so it's up-to-date.
154 block->resetModified();
156 catch (SerializationError &e)
158 errorstream << "Invalid block data in database"
159 << " (" << blockpos.X << "," << blockpos.Y << "," << blockpos.Z
160 << ") (SerializationError): " << e.what() << std::endl;
161 // TODO: Block should be marked as invalid in memory so that it is
162 // not touched but the game can run
164 if (g_settings->getBool("ignore_world_load_errors")) {
165 errorstream << "Ignoring block load error. Duck and cover! "
166 << "(ignore_world_load_errors)" << std::endl;
168 throw SerializationError("Invalid block data in database");
173 return srvmap->getBlockNoCreateNoEx(blockpos); // should not be using this here
178 void Database_LevelDB::listAllLoadableBlocks(std::list<v3s16> &dst)
180 leveldb::Iterator* it = m_database->NewIterator(leveldb::ReadOptions());
181 for (it->SeekToFirst(); it->Valid(); it->Next()) {
182 dst.push_back(getIntegerAsBlock(stoi64(it->key().ToString())));
184 ENSURE_STATUS_OK(it->status()); // Check for any errors found during the scan
188 Database_LevelDB::~Database_LevelDB()