102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#if USE_LEVELDB
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#include "database-leveldb.h"
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#include "log.h"
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#include "filesys.h"
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#include "exceptions.h"
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#include "util/string.h"
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#include "leveldb/db.h"
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#define ENSURE_STATUS_OK(s) \
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if (!(s).ok()) { \
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throw DatabaseException(std::string("LevelDB error: ") + \
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(s).ToString()); \
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}
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Database_LevelDB::Database_LevelDB(const std::string &savedir)
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{
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leveldb::Options options;
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options.create_if_missing = true;
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leveldb::Status status = leveldb::DB::Open(options,
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savedir + DIR_DELIM + "map.db", &m_database);
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ENSURE_STATUS_OK(status);
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}
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Database_LevelDB::~Database_LevelDB()
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{
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delete m_database;
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}
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bool Database_LevelDB::saveBlock(const v3s16 &pos, const std::string &data)
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{
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leveldb::Status status = m_database->Put(leveldb::WriteOptions(),
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i64tos(getBlockAsInteger(pos)), data);
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if (!status.ok()) {
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warningstream << "saveBlock: LevelDB error saving block "
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<< PP(pos) << ": " << status.ToString() << std::endl;
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return false;
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}
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return true;
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}
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void Database_LevelDB::loadBlock(const v3s16 &pos, std::string *block)
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{
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std::string datastr;
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leveldb::Status status = m_database->Get(leveldb::ReadOptions(),
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i64tos(getBlockAsInteger(pos)), &datastr);
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*block = (status.ok()) ? datastr : "";
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}
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bool Database_LevelDB::deleteBlock(const v3s16 &pos)
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{
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leveldb::Status status = m_database->Delete(leveldb::WriteOptions(),
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i64tos(getBlockAsInteger(pos)));
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if (!status.ok()) {
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warningstream << "deleteBlock: LevelDB error deleting block "
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<< PP(pos) << ": " << status.ToString() << std::endl;
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return false;
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}
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return true;
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}
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void Database_LevelDB::listAllLoadableBlocks(std::vector<v3s16> &dst)
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{
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leveldb::Iterator* it = m_database->NewIterator(leveldb::ReadOptions());
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for (it->SeekToFirst(); it->Valid(); it->Next()) {
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dst.push_back(getIntegerAsBlock(stoi64(it->key().ToString())));
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}
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ENSURE_STATUS_OK(it->status()); // Check for any errors found during the scan
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delete it;
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}
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#endif // USE_LEVELDB
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