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// Copyright (c) 2017, 2025, Oracle and/or its affiliates.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 2.0,
// as published by the Free Software Foundation.
//
// This program is designed to work with certain software (including
// but not limited to OpenSSL) that is licensed under separate terms,
// as designated in a particular file or component or in included license
// documentation. The authors of MySQL hereby grant you an additional
// permission to link the program and your derivative works with the
// separately licensed software that they have either included with
// the program or referenced in the documentation.
//
// 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 General Public License, version 2.0, for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
/// @file
///
/// This file implements the difference function.
#include <memory> // std::unique_ptr
#include "sql/gis/difference_functor.h"
#include "sql/gis/setops.h"
#include "sql/sql_exception_handler.h" // handle_gis_exception
namespace gis {
bool difference(const dd::Spatial_reference_system *srs, const Geometry *g1,
const Geometry *g2, const char *func_name,
std::unique_ptr<Geometry> *result) noexcept {
try {
assert(g1 && g2 && g1->coordinate_system() == g2->coordinate_system());
assert(((srs == nullptr || srs->is_cartesian()) &&
g1->coordinate_system() == Coordinate_system::kCartesian) ||
(srs && srs->is_geographic() &&
g1->coordinate_system() == Coordinate_system::kGeographic));
Difference difference_func(srs ? srs->semi_major_axis() : 0.0,
srs ? srs->semi_minor_axis() : 0.0);
*result = difference_func(g1, g2);
if (result->get()->type() != Geometry_type::kGeometrycollection &&
result->get()->is_empty()) {
if (result->get()->coordinate_system() == Coordinate_system::kCartesian) {
*result = std::make_unique<Cartesian_geometrycollection>();
} else {
*result = std::make_unique<Geographic_geometrycollection>();
}
}
} catch (...) {
handle_gis_exception(func_name);
return true;
}
return false;
}
} // namespace gis
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