Developer Documentation

SerializersT_impl.hh
1 /*===========================================================================*\
2 * *
3 * OpenVolumeMesh *
4 * Copyright (C) 2011 by Computer Graphics Group, RWTH Aachen *
5 * www.openvolumemesh.org *
6 * *
7 *---------------------------------------------------------------------------*
8 * This file is part of OpenVolumeMesh. *
9 * *
10 * OpenVolumeMesh is free software: you can redistribute it and/or modify *
11 * it under the terms of the GNU Lesser General Public License as *
12 * published by the Free Software Foundation, either version 3 of *
13 * the License, or (at your option) any later version with the *
14 * following exceptions: *
15 * *
16 * If other files instantiate templates or use macros *
17 * or inline functions from this file, or you compile this file and *
18 * link it with other files to produce an executable, this file does *
19 * not by itself cause the resulting executable to be covered by the *
20 * GNU Lesser General Public License. This exception does not however *
21 * invalidate any other reasons why the executable file might be *
22 * covered by the GNU Lesser General Public License. *
23 * *
24 * OpenVolumeMesh is distributed in the hope that it will be useful, *
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
27 * GNU Lesser General Public License for more details. *
28 * *
29 * You should have received a copy of the GNU LesserGeneral Public *
30 * License along with OpenVolumeMesh. If not, *
31 * see <http://www.gnu.org/licenses/>. *
32 * *
33 \*===========================================================================*/
34
35 /*===========================================================================*\
36 * *
37 * $Revision: 236 $ *
38 * $Date: 2013-02-19 12:32:33 +0100 (Tue, 19 Feb 2013) $ *
39 * $LastChangedBy: kremer $ *
40 * *
41 \*===========================================================================*/
42
43 #define SERIALIZERST_CC
44
45 #include "Serializers.hh"
46
47 namespace OpenVolumeMesh
48 {
49
50 template<typename T>
51 T& decllval();
52
53 template <bool B> struct bool_type;
54 template <> struct bool_type<true> { char c[1]; };
55 template <> struct bool_type<false> { char c[2]; };
56
57 typedef bool_type<true> true_type;
58 typedef bool_type<false> false_type;
59
60 template <typename Stream, typename T>
61 class has_input_operator
62 {
63 private:
64 template<class U> static true_type test(char(*)[sizeof(decllval<Stream>() >> decllval<U>(), void(), 0)]);
65 template<class U> static false_type test(...);
66
67 public:
68 enum { bool_value = sizeof(true_type) == sizeof(test<T>(nullptr)) };
69 typedef bool_type<bool_value> type;
70 static type value;
71 };
72
73 template <typename Stream, typename T>
74 typename has_input_operator<Stream, T>::type has_input_operator<Stream, T>::value = typename has_input_operator<Stream, T>::type();
75
76
77 template <typename Stream, typename T>
78 class has_output_operator
79 {
80 private:
81 template<class U> static true_type test(char(*)[sizeof(decllval<Stream>() << decllval<U>(), void(), 0)]);
82 template<class U> static false_type test(...);
83
84 public:
85 enum { bool_value = sizeof(true_type) == sizeof(test<T>(nullptr)) };
86 typedef bool_type<bool_value> type;
87 static type value;
88 };
89
90 template <typename Stream, typename T>
91 typename has_output_operator<Stream, T>::type has_output_operator<Stream, T>::value = typename has_output_operator<Stream, T>::type();
92
93
94 template <typename ValueT>
95 std::ostream& serialize_helper(std::ostream& _ostr, ValueT& _rhs, true_type)
96 {
97 _ostr << _rhs;
98 return _ostr;
99 }
100
101 template <typename ValueT>
102 std::ostream& serialize_helper(std::ostream& _ostr, ValueT&, false_type)
103 {
104 std::cout << "Warning: trying to serialize a type that does not have a serialize function" << std::endl;
105 return _ostr;
106 }
107
108 template <typename ValueT>
109 std::ostream& serialize(std::ostream& _ostr, const ValueT& _rhs)
110 {
111 return serialize_helper(_ostr, _rhs, has_output_operator<std::ostream, ValueT>::value);
112 }
113
114
115 template <typename ValueT>
116 std::istream& deserialize_helper(std::istream& _istr, ValueT& _rhs, true_type)
117 {
118 _istr >> _rhs;
119 return _istr;
120 }
121
122 template <typename ValueT>
123 std::istream& deserialize_helper(std::istream& _istr, ValueT&, false_type)
124 {
125 std::cout << "Warning: trying to deserialize a type that does not have a deserialize function" << std::endl;
126 return _istr;
127 }
128
129 template <typename ValueT>
130 std::istream& deserialize(std::istream& _istr, ValueT& _rhs)
131 {
132 return deserialize_helper(_istr, _rhs, has_input_operator<std::istream, ValueT>::value);
133 }
134
135 template <typename KeyT, typename ValueT>
136 std::ostream& serialize(std::ostream& os, const std::map< KeyT, ValueT >& rhs)
137 {
138 os << rhs.size() << std::endl;
139 for (typename std::map< KeyT, ValueT >::const_iterator it = rhs.begin();
140 it != rhs.end();
141 ++it)
142 {
143 serialize(os,it->first) << std::endl;
144 serialize(os, it->second) << std::endl;
145 }
146
147 return os;
148 }
149
150 template <typename KeyT, typename ValueT>
151 std::istream& deserialize(std::istream& is, std::map< KeyT, ValueT >& rhs)
152 {
153
154 size_t size;
155 is >> size;
156 rhs.clear();
157 for (size_t i=0; i<size; i++)
158 {
159 KeyT key;
160 ValueT value;
161 deserialize(is, key);
162 deserialize(is, value);
163 rhs[key] = value;
164 }
165
166 return is;
167 }
168
169 template <typename ValueT>
170 std::ostream& serialize(std::ostream& _ostr, const std::vector< ValueT >& _rhs)
171 {
172 _ostr << _rhs.size() << std::endl;
173 for (size_t i = 0; i < _rhs.size(); ++i)
174 serialize(_ostr, _rhs[i]) << std::endl;
175 return _ostr;
176 }
177
178 template <typename ValueT>
179 std::istream& deserialize(std::istream& _istr, std::vector< ValueT >& _rhs)
180 {
181 size_t size;
182 _istr >> size;
183 _rhs.resize(size);
184 for (size_t i=0; i<size; i++)
185 deserialize(_istr,_rhs[i]);
186
187 return _istr;
188 }
189
190
191 }
OpenVolumeMesh
Definition: ColorAttrib.hh:53
OpenVolumeMesh::bool_type< true >
Definition: SerializersT_impl.hh:54
OpenVolumeMesh::bool_type< false >
Definition: SerializersT_impl.hh:55
OpenVolumeMesh::bool_type
Definition: SerializersT_impl.hh:53
OpenVolumeMesh::has_input_operator
Definition: SerializersT_impl.hh:61
OpenVolumeMesh::has_output_operator
Definition: SerializersT_impl.hh:78
test
Definition: minimalExecutionTest.cc:5