Libosmium  2.15.4
Fast and flexible C++ library for working with OpenStreetMap data
diff_visitor.hpp
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1 #ifndef OSMIUM_DIFF_VISITOR_HPP
2 #define OSMIUM_DIFF_VISITOR_HPP
3 
4 /*
5 
6 This file is part of Osmium (https://osmcode.org/libosmium).
7 
8 Copyright 2013-2019 Jochen Topf <jochen@topf.org> and others (see README).
9 
10 Boost Software License - Version 1.0 - August 17th, 2003
11 
12 Permission is hereby granted, free of charge, to any person or organization
13 obtaining a copy of the software and accompanying documentation covered by
14 this license (the "Software") to use, reproduce, display, distribute,
15 execute, and transmit the Software, and to prepare derivative works of the
16 Software, and to permit third-parties to whom the Software is furnished to
17 do so, all subject to the following:
18 
19 The copyright notices in the Software and this entire statement, including
20 the above license grant, this restriction and the following disclaimer,
21 must be included in all copies of the Software, in whole or in part, and
22 all derivative works of the Software, unless such copies or derivative
23 works are solely in the form of machine-executable object code generated by
24 a source language processor.
25 
26 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
29 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
30 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
31 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
32 DEALINGS IN THE SOFTWARE.
33 
34 */
35 
36 #include <osmium/diff_iterator.hpp>
38 #include <osmium/memory/buffer.hpp>
40 #include <osmium/osm/item_type.hpp>
41 
42 namespace osmium {
43 
44  namespace detail {
45 
46  template <typename THandler>
47  inline void apply_diff_iterator_recurse(const osmium::DiffObject& diff, THandler& handler) {
48  switch (diff.type()) {
50  handler.node(static_cast<const osmium::DiffNode&>(diff));
51  break;
53  handler.way(static_cast<const osmium::DiffWay&>(diff));
54  break;
56  handler.relation(static_cast<const osmium::DiffRelation&>(diff));
57  break;
58  default:
59  throw osmium::unknown_type{};
60  }
61  }
62 
63  template <typename THandler, typename... TRest>
64  inline void apply_diff_iterator_recurse(const osmium::DiffObject& diff, THandler& handler, TRest&... more) {
65  apply_diff_iterator_recurse(diff, handler);
66  apply_diff_iterator_recurse(diff, more...);
67  }
68 
69  } // namespace detail
70 
71  template <typename TIterator, typename... THandlers>
72  inline void apply_diff(TIterator it, TIterator end, THandlers&... handlers) {
73  using diff_iterator = osmium::DiffIterator<TIterator>;
74 
75  diff_iterator dit{it, end};
76  diff_iterator dend{end, end};
77 
78  for (; dit != dend; ++dit) {
79  detail::apply_diff_iterator_recurse(*dit, handlers...);
80  }
81  }
82 
83  class OSMObject;
84 
85  template <typename TSource, typename... THandlers>
86  inline void apply_diff(TSource& source, THandlers&... handlers) {
89  handlers...);
90  }
91 
92  template <typename... THandlers>
93  inline void apply_diff(osmium::memory::Buffer& buffer, THandlers&... handlers) {
94  apply_diff(buffer.begin(), buffer.end(), handlers...);
95  }
96 
97  template <typename... THandlers>
98  inline void apply_diff(const osmium::memory::Buffer& buffer, THandlers&... handlers) {
99  apply_diff(buffer.cbegin(), buffer.cend(), handlers...);
100  }
101 
102 } // namespace osmium
103 
104 #endif // OSMIUM_DIFF_VISITOR_HPP
diff_object.hpp
osmium::DiffIterator
Definition: diff_iterator.hpp:57
osmium::memory::Buffer::end
t_iterator< T > end()
Definition: buffer.hpp:746
detail
Definition: attr.hpp:333
osmium::DiffObject::type
osmium::item_type type() const noexcept
Definition: diff_object.hpp:155
osmium::memory::Buffer::cend
t_const_iterator< T > cend() const
Definition: buffer.hpp:789
osmium::memory::Buffer
Definition: buffer.hpp:97
osmium::memory::Buffer::cbegin
t_const_iterator< T > cbegin() const
Definition: buffer.hpp:765
osmium::unknown_type
Definition: item_type.hpp:195
osmium
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
osmium::item_type::node
@ node
osmium::DiffObjectDerived
Definition: diff_object.hpp:243
osmium::io::InputIterator
Definition: input_iterator.hpp:55
osmium::DiffObject
Definition: diff_object.hpp:66
diff_iterator.hpp
osmium::apply_diff
void apply_diff(TIterator it, TIterator end, THandlers &... handlers)
Definition: diff_visitor.hpp:72
osmium::item_type::way
@ way
buffer.hpp
osmium::memory::Buffer::begin
t_iterator< T > begin()
Definition: buffer.hpp:688
osmium::item_type::relation
@ relation
input_iterator.hpp
item_type.hpp
osmium::io::end
InputIterator< Reader > end(Reader &)
Definition: reader_iterator.hpp:47