140 lines
4.2 KiB
C++
140 lines
4.2 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2021 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_SQLITE_PREPARED_HPP
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#define MAPNIK_SQLITE_PREPARED_HPP
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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/datasource.hpp>
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#include <mapnik/params.hpp>
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#include <mapnik/geometry/box2d.hpp>
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#include <mapnik/util/noncopyable.hpp>
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// boost
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#include <memory>
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// stl
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#include <string.h>
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#include "sqlite_connection.hpp"
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// sqlite
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extern "C" {
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#include <sqlite3.h>
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}
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class prepared_index_statement : mapnik::util::noncopyable
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{
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public:
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prepared_index_statement(std::shared_ptr<sqlite_connection> ds, std::string const& sql)
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: ds_(ds),
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stmt_(0)
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{
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const int rc = sqlite3_prepare_v2(*(*ds_),
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sql.c_str(),
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-1,
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&stmt_,
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0);
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if (rc != SQLITE_OK)
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{
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std::ostringstream index_error;
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index_error << "Sqlite Plugin: auto-index table creation failed: '"
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<< sqlite3_errmsg(*(*ds_)) << "' query was: "
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<< sql;
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throw mapnik::datasource_exception(index_error.str());
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}
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}
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~prepared_index_statement()
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{
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if (stmt_)
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{
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int res = sqlite3_finalize(stmt_);
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if (res != SQLITE_OK)
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{
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if (*(*ds_))
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{
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MAPNIK_LOG_ERROR(sqlite) << "~prepared_index_statement:"
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<< sqlite3_errmsg(*(*ds_));
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}
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else
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{
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MAPNIK_LOG_ERROR(sqlite) << "~prepared_index_statement:"
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<< res;
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}
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}
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}
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}
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void bind(sqlite_int64 const pkid)
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{
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if (sqlite3_bind_int64(stmt_, 1, pkid) != SQLITE_OK)
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{
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throw mapnik::datasource_exception("SQLite Plugin: invalid value for for key field while generating index");
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}
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}
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void bind(mapnik::box2d<double> const& bbox)
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{
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if ((sqlite3_bind_double(stmt_, 2, bbox.minx()) != SQLITE_OK) ||
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(sqlite3_bind_double(stmt_, 3, bbox.maxx()) != SQLITE_OK) ||
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(sqlite3_bind_double(stmt_, 4, bbox.miny()) != SQLITE_OK) ||
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(sqlite3_bind_double(stmt_, 5, bbox.maxy()) != SQLITE_OK))
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{
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throw mapnik::datasource_exception("SQLite Plugin: invalid value for for extent while generating index");
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}
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}
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bool step_next ()
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{
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const int status = sqlite3_step(stmt_);
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if (status != SQLITE_DONE)
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{
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std::ostringstream s;
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s << "SQLite Plugin: inserting bbox into rtree index failed";
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std::string msg(sqlite3_errmsg(sqlite3_db_handle(stmt_)));
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if (msg != "unknown error")
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{
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s << ": " << msg;
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}
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throw mapnik::datasource_exception(s.str());
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}
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sqlite3_clear_bindings(stmt_);
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if (sqlite3_reset(stmt_) != SQLITE_OK)
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{
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throw mapnik::datasource_exception("sqlite3_reset failed");
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}
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return true;
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}
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private:
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std::shared_ptr<sqlite_connection> ds_;
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sqlite3_stmt * stmt_;
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};
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#endif // MAPNIK_SQLITE_PREPARED_HPP
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