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#ifndef SQL_GIS_BUFFER_STRATEGIES_H_INCLUDED
#define SQL_GIS_BUFFER_STRATEGIES_H_INCLUDED
// Copyright (c) 2021, 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 a struct that is used to hold information that
/// decide how to compute the buffer of a geometry.
#include <cstddef>
namespace gis {
// Used as cases in the switch in Item_func_st_buffer::parse_strategy.
// Cannot use enum because switching on type uint.
constexpr uint kEndRound = 1;
constexpr uint kEndFlat = 2;
constexpr uint kJoinRound = 3;
constexpr uint kJoinMiter = 4;
constexpr uint kPointCircle = 5;
constexpr uint kPointSquare = 6;
struct BufferStrategies {
// See Boost's documentation for information on bg::buffer's strategies.
std::size_t join_circle_value = 32;
std::size_t end_circle_value = 32;
std::size_t point_circle_value = 32;
double join_miter_value = 5.0;
double distance = 0;
bool join_is_set = false;
bool end_is_set = false;
bool point_is_set = false;
/// 8 possible combinations since 'End = round || flat', 'Join = round ||
/// miter', and 'Point = circle || square'. Default combo is 0, with
/// default values. Combo made by bitwise OR-ing.
/// 0 : join_round, end_round, point_circle
/// 1 : join_round, end_flat, point_circle
/// 2 : join_miter, end_round, point_circle
/// 3 : join_miter, end_flat, point_circle
/// 4 : join_round, end_round, point_square
/// 5 : join_round, end_flat, point_square
/// 6 : join_miter, end_round, point_square
/// 7 : join_miter, end_flat, point_square
int combination = 0;
bool set_end_round(double value) {
if (end_is_set ||
value >= static_cast<double>(std::numeric_limits<std::size_t>::max())) {
return true;
} else {
end_is_set = true;
end_circle_value = static_cast<std::size_t>(value);
return false;
}
}
bool set_end_flat() {
if (end_is_set) {
return true;
} else {
end_is_set = true;
combination |= 1;
return false;
}
}
bool set_join_round(double value) {
if (join_is_set ||
value >= static_cast<double>(std::numeric_limits<std::size_t>::max())) {
return true;
} else {
join_is_set = true;
join_circle_value = static_cast<std::size_t>(value);
return false;
}
}
bool set_join_miter(double value) {
if (join_is_set) {
return true;
} else {
join_is_set = true;
combination |= 2;
join_miter_value = value;
return false;
}
}
bool set_point_circle(double value) {
if (point_is_set ||
value >= static_cast<double>(std::numeric_limits<std::size_t>::max())) {
return true;
} else {
point_is_set = true;
point_circle_value = static_cast<std::size_t>(value);
return false;
}
}
bool set_point_square() {
if (point_is_set) {
return true;
} else {
point_is_set = true;
combination |= 4;
return false;
}
}
};
} // namespace gis
#endif // SQL_GIS_BUFFER_H_INCLUDED
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