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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 "config.h"
#if USE_LEVELDB
#include "database-leveldb.h"
#include "log.h"
#include "filesys.h"
#include "exceptions.h"
#include "util/string.h"
#include "leveldb/db.h"
#define ENSURE_STATUS_OK(s) \
if (!(s).ok()) { \
throw FileNotGoodException(std::string("LevelDB error: ") + \
(s).ToString()); \
}
Database_LevelDB::Database_LevelDB(const std::string &savedir)
{
leveldb::Options options;
options.create_if_missing = true;
leveldb::Status status = leveldb::DB::Open(options,
savedir + DIR_DELIM + "map.db", &m_database);
ENSURE_STATUS_OK(status);
}
Database_LevelDB::~Database_LevelDB()
{
delete m_database;
}
bool Database_LevelDB::saveBlock(const v3s16 &pos, const std::string &data)
{
leveldb::Status status = m_database->Put(leveldb::WriteOptions(),
i64tos(getBlockAsInteger(pos)), data);
if (!status.ok()) {
errorstream << "WARNING: saveBlock: LevelDB error saving block "
<< PP(pos) << ": " << status.ToString() << std::endl;
return false;
}
return true;
}
std::string Database_LevelDB::loadBlock(const v3s16 &pos)
{
std::string datastr;
leveldb::Status status = m_database->Get(leveldb::ReadOptions(),
i64tos(getBlockAsInteger(pos)), &datastr);
if(status.ok())
return datastr;
else
return "";
}
bool Database_LevelDB::deleteBlock(const v3s16 &pos)
{
leveldb::Status status = m_database->Delete(leveldb::WriteOptions(),
i64tos(getBlockAsInteger(pos)));
if (!status.ok()) {
errorstream << "WARNING: deleteBlock: LevelDB error deleting block "
<< PP(pos) << ": " << status.ToString() << std::endl;
return false;
}
return true;
}
void Database_LevelDB::listAllLoadableBlocks(std::vector<v3s16> &dst)
{
leveldb::Iterator* it = m_database->NewIterator(leveldb::ReadOptions());
for (it->SeekToFirst(); it->Valid(); it->Next()) {
dst.push_back(getIntegerAsBlock(stoi64(it->key().ToString())));
}
ENSURE_STATUS_OK(it->status()); // Check for any errors found during the scan
delete it;
}
#endif // USE_LEVELDB
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