75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
#ifndef SQL_GIS_WKB_VISITOR_H_INCLUDED
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#define SQL_GIS_WKB_VISITOR_H_INCLUDED
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// Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0,
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// as published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an additional
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// permission to link the program and your derivative works with the
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// separately licensed software that they have included with MySQL.
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//
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// This program 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
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// GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; 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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#include "sql/dd/types/spatial_reference_system.h" // dd::Spatial_reference_system
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#include "sql/gis/geometry_visitor.h"
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namespace gis {
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/// A visitor that serializes the geometry to little-endian WKB and appends it
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/// to a string.
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class Wkb_visitor : public Nop_visitor {
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private:
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/// Spatial reference system of the geometry.
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const dd::Spatial_reference_system *m_srs;
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/// The WKB string.
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const char *m_wkb;
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/// Size of the buffer allocated for the WKB string.
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const size_t m_wkb_size;
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/// The position of the next character to be added to the string.
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char *m_wkb_current_position;
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public:
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/// Construct a new WKB visitor.
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///
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/// @param[in] srs The spatial reference system of the geometry.
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/// @param[in] wkb The string to write the WKB to.
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/// @param[in] wkb_size The length of the WKB string buffer.
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Wkb_visitor(const dd::Spatial_reference_system *srs, char *wkb,
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size_t wkb_size)
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: m_srs(srs),
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m_wkb(wkb),
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m_wkb_size(wkb_size),
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m_wkb_current_position(wkb) {}
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using Nop_visitor::visit_enter;
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bool visit_enter(Geometry *) override {
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/* purecov: begin deadcode */
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DBUG_ASSERT(false);
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return true;
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/* purecov: end */
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}
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bool visit_enter(Linestring *ls) override;
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bool visit_enter(Polygon *py) override;
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bool visit_enter(Geometrycollection *gc) override;
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using Nop_visitor::visit;
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bool visit(Point *pt) override;
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};
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} // namespace gis
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#endif // SQL_GIS_WKB_VISITOR_H_INCLUDED
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