From 20a85d76d94c9c5c7fbe198c3d0e1fbee97a485f Mon Sep 17 00:00:00 2001
From: Vitaliy <silverunicorn2011@yandex.ru>
Date: Thu, 9 Nov 2017 01:56:20 +0300
Subject: Move files to subdirectories (#6599)

* Move files around
---
 src/database/database-leveldb.cpp | 101 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/database/database-leveldb.cpp

(limited to 'src/database/database-leveldb.cpp')

diff --git a/src/database/database-leveldb.cpp b/src/database/database-leveldb.cpp
new file mode 100644
index 000000000..4a4904c6a
--- /dev/null
+++ b/src/database/database-leveldb.cpp
@@ -0,0 +1,101 @@
+/*
+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 DatabaseException(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()) {
+		warningstream << "saveBlock: LevelDB error saving block "
+			<< PP(pos) << ": " << status.ToString() << std::endl;
+		return false;
+	}
+
+	return true;
+}
+
+void Database_LevelDB::loadBlock(const v3s16 &pos, std::string *block)
+{
+	std::string datastr;
+	leveldb::Status status = m_database->Get(leveldb::ReadOptions(),
+		i64tos(getBlockAsInteger(pos)), &datastr);
+
+	*block = (status.ok()) ? datastr : "";
+}
+
+bool Database_LevelDB::deleteBlock(const v3s16 &pos)
+{
+	leveldb::Status status = m_database->Delete(leveldb::WriteOptions(),
+			i64tos(getBlockAsInteger(pos)));
+	if (!status.ok()) {
+		warningstream << "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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