/usr/include/osmium/dynamic_handler.hpp is in libosmium2-dev 2.6.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | #ifndef OSMIUM_DYNAMIC_HANDLER_HPP
#define OSMIUM_DYNAMIC_HANDLER_HPP
/*
This file is part of Osmium (http://osmcode.org/libosmium).
Copyright 2013-2016 Jochen Topf <jochen@topf.org> and others (see README).
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include <memory>
#include <utility>
#include <osmium/fwd.hpp>
#include <osmium/handler.hpp>
namespace osmium {
namespace handler {
namespace detail {
class HandlerWrapperBase {
public:
virtual ~HandlerWrapperBase() {
}
virtual void node(const osmium::Node&) {
}
virtual void way(const osmium::Way&) {
}
virtual void relation(const osmium::Relation&) {
}
virtual void area(const osmium::Area&) {
}
virtual void changeset(const osmium::Changeset&) {
}
virtual void flush() {
}
}; // class HandlerWrapperBase
// The following uses trick from
// http://stackoverflow.com/questions/257288/is-it-possible-to-write-a-c-template-to-check-for-a-functions-existence
// to either call handler style functions or visitor style operator().
#define OSMIUM_DYNAMIC_HANDLER_DISPATCH(_name_, _type_) \
template <typename THandler> \
auto _name_##_dispatch(THandler& handler, const osmium::_type_& object, int) -> decltype(handler._name_(object), void()) { \
handler._name_(object); \
} \
template <typename THandler> \
auto _name_##_dispatch(THandler& handler, const osmium::_type_& object, long) -> decltype(handler(object), void()) { \
handler(object); \
}
OSMIUM_DYNAMIC_HANDLER_DISPATCH(node, Node)
OSMIUM_DYNAMIC_HANDLER_DISPATCH(way, Way)
OSMIUM_DYNAMIC_HANDLER_DISPATCH(relation, Relation)
OSMIUM_DYNAMIC_HANDLER_DISPATCH(changeset, Changeset)
OSMIUM_DYNAMIC_HANDLER_DISPATCH(area, Area)
template <typename THandler>
auto flush_dispatch(THandler& handler, int) -> decltype(handler.flush(), void()) {
handler.flush();
}
template <typename THandler>
void flush_dispatch(THandler&, long) {}
template <typename THandler>
class HandlerWrapper : public HandlerWrapperBase {
THandler m_handler;
public:
template <typename... TArgs>
HandlerWrapper(TArgs&&... args) :
m_handler(std::forward<TArgs>(args)...) {
}
void node(const osmium::Node& node) final {
node_dispatch(m_handler, node, 0);
}
void way(const osmium::Way& way) final {
way_dispatch(m_handler, way, 0);
}
void relation(const osmium::Relation& relation) final {
relation_dispatch(m_handler, relation, 0);
}
void area(const osmium::Area& area) final {
area_dispatch(m_handler, area, 0);
}
void changeset(const osmium::Changeset& changeset) final {
changeset_dispatch(m_handler, changeset, 0);
}
void flush() final {
flush_dispatch(m_handler, 0);
}
}; // class HandlerWrapper
} // namespace detail
class DynamicHandler : public osmium::handler::Handler {
typedef std::unique_ptr<osmium::handler::detail::HandlerWrapperBase> impl_ptr;
impl_ptr m_impl;
public:
DynamicHandler() :
m_impl(impl_ptr(new osmium::handler::detail::HandlerWrapperBase)) {
}
template <typename THandler, typename... TArgs>
void set(TArgs&&... args) {
m_impl = impl_ptr(new osmium::handler::detail::HandlerWrapper<THandler>(std::forward<TArgs>(args)...));
}
void node(const osmium::Node& node) {
m_impl->node(node);
}
void way(const osmium::Way& way) {
m_impl->way(way);
}
void relation(const osmium::Relation& relation) {
m_impl->relation(relation);
}
void area(const osmium::Area& area) {
m_impl->area(area);
}
void changeset(const osmium::Changeset& changeset) {
m_impl->changeset(changeset);
}
void flush() {
m_impl->flush();
}
}; // class DynamicHandler
} // namespace handler
} // namespace osmium
#endif // OSMIUM_DYNAMIC_HANDLER_HPP
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