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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2025 Artem Pavlenko
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_SQLITE_CONNECTION_HPP
#define MAPNIK_SQLITE_CONNECTION_HPP
// stl
#include <string.h>
#include <memory>
// mapnik
#include <mapnik/datasource.hpp>
#include <mapnik/params.hpp>
#include <mapnik/timer.hpp>
#include <mapnik/warning.hpp>
MAPNIK_DISABLE_WARNING_PUSH
#include <mapnik/warning_ignore.hpp>
#include <boost/algorithm/string.hpp>
MAPNIK_DISABLE_WARNING_POP
// sqlite
extern "C" {
#include <sqlite3.h>
}
#include "sqlite_resultset.hpp"
//==============================================================================
class sqlite_connection
{
public:
sqlite_connection(std::string const& file)
: db_(0),
file_(file)
{
#if SQLITE_VERSION_NUMBER >= 3005000
int mode = SQLITE_OPEN_READWRITE;
#if SQLITE_VERSION_NUMBER >= 3006018
// shared cache flag not available until >= 3.6.18
// Don't use shared cache in SQLite prior to 3.7.15.
// https://github.com/mapnik/mapnik/issues/2483
if (sqlite3_libversion_number() >= 3007015)
{
mode |= SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_SHAREDCACHE;
}
#endif
int const rc = sqlite3_open_v2(file_.c_str(), &db_, mode, 0);
#else
int const rc = sqlite3_open(file_.c_str(), &db_);
#endif
if (rc != SQLITE_OK)
{
std::ostringstream s;
s << "Sqlite Plugin: " << sqlite3_errmsg(db_);
throw mapnik::datasource_exception(s.str());
}
sqlite3_busy_timeout(db_, 5000);
}
sqlite_connection(std::string const& file, int flags)
: db_(0),
file_(file)
{
#if SQLITE_VERSION_NUMBER >= 3005000
int const rc = sqlite3_open_v2(file_.c_str(), &db_, flags, 0);
#else
int const rc = sqlite3_open(file_.c_str(), &db_);
#endif
if (rc != SQLITE_OK)
{
std::ostringstream s;
s << "Sqlite Plugin: " << sqlite3_errmsg(db_);
throw mapnik::datasource_exception(s.str());
}
}
virtual ~sqlite_connection()
{
if (db_)
{
sqlite3_close(db_);
}
}
void throw_sqlite_error(std::string const& sql)
{
std::ostringstream s;
s << "Sqlite Plugin: ";
if (db_)
s << "'" << sqlite3_errmsg(db_) << "'";
else
s << "unknown error, lost connection";
s << " (" << file_ << ")" << "\nFull sql was: '" << sql << "'";
throw mapnik::datasource_exception(s.str());
}
std::unique_ptr<sqlite_resultset> execute_query(std::string const& sql)
{
#ifdef MAPNIK_STATS
mapnik::progress_timer __stats__(std::clog, std::string("sqlite_resultset::execute_query ") + sql);
#endif
sqlite3_stmt* stmt = 0;
int const rc = sqlite3_prepare_v2(db_, sql.c_str(), -1, &stmt, 0);
if (rc != SQLITE_OK)
{
throw_sqlite_error(sql);
}
return std::make_unique<sqlite_resultset>(stmt);
}
void execute(std::string const& sql)
{
#ifdef MAPNIK_STATS
mapnik::progress_timer __stats__(std::clog, std::string("sqlite_resultset::execute ") + sql);
#endif
int const rc = sqlite3_exec(db_, sql.c_str(), 0, 0, 0);
if (rc != SQLITE_OK)
{
throw_sqlite_error(sql);
}
}
int execute_with_code(std::string const& sql)
{
#ifdef MAPNIK_STATS
mapnik::progress_timer __stats__(std::clog, std::string("sqlite_resultset::execute_with_code ") + sql);
#endif
int const rc = sqlite3_exec(db_, sql.c_str(), 0, 0, 0);
return rc;
}
sqlite3* operator*() { return db_; }
bool load_extension(std::string const& ext_path)
{
sqlite3_enable_load_extension(db_, 1);
int result = sqlite3_load_extension(db_, ext_path.c_str(), 0, 0);
return (result == SQLITE_OK) ? true : false;
}
private:
sqlite3* db_;
std::string file_;
};
#endif // MAPNIK_SQLITE_CONNECTION_HPP
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