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Implement a PostgreSQL backend

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Loic Blot 2016-05-14 11:00:42 +02:00
parent 0f184d77c8
commit ce42ff9cf7
7 changed files with 433 additions and 2 deletions
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src/database-postgresql.h Normal file
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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.
*/
#ifndef DATABASE_POSTGRESQL_HEADER
#define DATABASE_POSTGRESQL_HEADER
#include <string>
#include <libpq-fe.h>
#include "database.h"
#include "util/basic_macros.h"
class Settings;
class Database_PostgreSQL : public Database
{
public:
Database_PostgreSQL(const Settings &conf);
~Database_PostgreSQL();
void beginSave();
void endSave();
bool saveBlock(const v3s16 &pos, const std::string &data);
void loadBlock(const v3s16 &pos, std::string *block);
bool deleteBlock(const v3s16 &pos);
void listAllLoadableBlocks(std::vector<v3s16> &dst);
bool initialized() const;
private:
// Database initialization
void connectToDatabase();
void initStatements();
void createDatabase();
inline void prepareStatement(const std::string &name, const std::string &sql)
{
checkResults(PQprepare(m_conn, name.c_str(), sql.c_str(), 0, NULL));
}
// Database connectivity checks
void ping();
void verifyDatabase();
// Database usage
PGresult *checkResults(PGresult *res, bool clear = true);
inline PGresult *execPrepared(const char *stmtName, const int paramsNumber,
const void **params,
const int *paramsLengths = NULL, const int *paramsFormats = NULL,
bool clear = true, bool nobinary = true)
{
return checkResults(PQexecPrepared(m_conn, stmtName, paramsNumber,
(const char* const*) params, paramsLengths, paramsFormats,
nobinary ? 1 : 0), clear);
}
// Conversion helpers
inline int pg_to_int(PGresult *res, int row, int col)
{
return atoi(PQgetvalue(res, row, col));
}
inline v3s16 pg_to_v3s16(PGresult *res, int row, int col)
{
return v3s16(
pg_to_int(res, row, col),
pg_to_int(res, row, col + 1),
pg_to_int(res, row, col + 2)
);
}
// Attributes
std::string m_connect_string;
PGconn *m_conn;
int m_pgversion;
};
#endif