1 /* sane - Scanner Access Now Easy.
2
3 Copyright (C) 2019 Povilas Kanapickas <povilas@radix.lt>
4
5 This file is part of the SANE package.
6
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <https://www.gnu.org/licenses/>.
19
20 As a special exception, the authors of SANE give permission for
21 additional uses of the libraries contained in this release of SANE.
22
23 The exception is that, if you link a SANE library with other files
24 to produce an executable, this does not by itself cause the
25 resulting executable to be covered by the GNU General Public
26 License. Your use of that executable is in no way restricted on
27 account of linking the SANE library code into it.
28
29 This exception does not, however, invalidate any other reasons why
30 the executable file might be covered by the GNU General Public
31 License.
32
33 If you submit changes to SANE to the maintainers to be included in
34 a subsequent release, you agree by submitting the changes that
35 those changes may be distributed with this exception intact.
36
37 If you write modifications of your own for SANE, it is your choice
38 whether to permit this exception to apply to your modifications.
39 If you do not wish that, delete this exception notice.
40 */
41
42 #ifndef BACKEND_GENESYS_SERIALIZE_H
43 #define BACKEND_GENESYS_SERIALIZE_H
44
45 #include "error.h"
46 #include <array>
47 #include <iostream>
48 #include <limits>
49 #include <string>
50 #include <vector>
51
52 namespace genesys {
53
54 // it would be best to use something like boost.serialization
55
serialize_newline(std::ostream & str)56 inline void serialize_newline(std::ostream& str) { str << '\n'; }
serialize_newline(std::istream & str)57 inline void serialize_newline(std::istream& str) { (void) str; }
58
serialize(std::ostream & str,bool x)59 inline void serialize(std::ostream& str, bool x) { str << static_cast<unsigned>(x) << " "; }
serialize(std::istream & str,bool & x)60 inline void serialize(std::istream& str, bool& x) { unsigned v; str >> v; x = v; }
serialize(std::ostream & str,char x)61 inline void serialize(std::ostream& str, char x) { str << static_cast<int>(x) << " "; }
serialize(std::istream & str,char & x)62 inline void serialize(std::istream& str, char& x) { int v; str >> v; x = v; }
serialize(std::ostream & str,unsigned char x)63 inline void serialize(std::ostream& str, unsigned char x) { str << static_cast<unsigned>(x) << " "; }
serialize(std::istream & str,unsigned char & x)64 inline void serialize(std::istream& str, unsigned char& x) { unsigned v; str >> v; x = v; }
serialize(std::ostream & str,signed char x)65 inline void serialize(std::ostream& str, signed char x) { str << static_cast<int>(x) << " "; }
serialize(std::istream & str,signed char & x)66 inline void serialize(std::istream& str, signed char& x) { int v; str >> v; x = v; }
serialize(std::ostream & str,short x)67 inline void serialize(std::ostream& str, short x) { str << x << " "; }
serialize(std::istream & str,short & x)68 inline void serialize(std::istream& str, short& x) { str >> x; }
serialize(std::ostream & str,unsigned short x)69 inline void serialize(std::ostream& str, unsigned short x) { str << x << " "; }
serialize(std::istream & str,unsigned short & x)70 inline void serialize(std::istream& str, unsigned short& x) { str >> x; }
serialize(std::ostream & str,int x)71 inline void serialize(std::ostream& str, int x) { str << x << " "; }
serialize(std::istream & str,int & x)72 inline void serialize(std::istream& str, int& x) { str >> x; }
serialize(std::ostream & str,unsigned int x)73 inline void serialize(std::ostream& str, unsigned int x) { str << x << " "; }
serialize(std::istream & str,unsigned int & x)74 inline void serialize(std::istream& str, unsigned int& x) { str >> x; }
serialize(std::ostream & str,long x)75 inline void serialize(std::ostream& str, long x) { str << x << " "; }
serialize(std::istream & str,long & x)76 inline void serialize(std::istream& str, long& x) { str >> x; }
serialize(std::ostream & str,unsigned long x)77 inline void serialize(std::ostream& str, unsigned long x) { str << x << " "; }
serialize(std::istream & str,unsigned long & x)78 inline void serialize(std::istream& str, unsigned long& x) { str >> x; }
serialize(std::ostream & str,long long x)79 inline void serialize(std::ostream& str, long long x) { str << x << " "; }
serialize(std::istream & str,long long & x)80 inline void serialize(std::istream& str, long long& x) { str >> x; }
serialize(std::ostream & str,unsigned long long x)81 inline void serialize(std::ostream& str, unsigned long long x) { str << x << " "; }
serialize(std::istream & str,unsigned long long & x)82 inline void serialize(std::istream& str, unsigned long long& x) { str >> x; }
serialize(std::ostream & str,float x)83 inline void serialize(std::ostream& str, float x) { str << x << " "; }
serialize(std::istream & str,float & x)84 inline void serialize(std::istream& str, float& x) { str >> x; }
serialize(std::ostream & str,double x)85 inline void serialize(std::ostream& str, double x) { str << x << " "; }
serialize(std::istream & str,double & x)86 inline void serialize(std::istream& str, double& x) { str >> x; }
serialize(std::ostream & str,const std::string & x)87 inline void serialize(std::ostream& str, const std::string& x) { str << x << " "; }
serialize(std::istream & str,std::string & x)88 inline void serialize(std::istream& str, std::string& x) { str >> x; }
89
90 template<class T>
serialize(std::ostream & str,std::vector<T> & x)91 void serialize(std::ostream& str, std::vector<T>& x)
92 {
93 serialize(str, x.size());
94 serialize_newline(str);
95
96 for (auto& item : x) {
97 serialize(str, item);
98 serialize_newline(str);
99 }
100 }
101
102 template<class T>
103 void serialize(std::istream& str, std::vector<T>& x,
104 size_t max_size = std::numeric_limits<size_t>::max())
105 {
106 size_t new_size;
107 serialize(str, new_size);
108
109 if (new_size > max_size) {
110 throw SaneException("Too large std::vector to deserialize");
111 }
112 x.reserve(new_size);
113 for (size_t i = 0; i < new_size; ++i) {
114 T item;
115 serialize(str, item);
116 x.push_back(item);
117 }
118 }
119
120 template<class T, size_t Size>
serialize(std::ostream & str,std::array<T,Size> & x)121 void serialize(std::ostream& str, std::array<T, Size>& x)
122 {
123 serialize(str, x.size());
124 serialize_newline(str);
125
126 for (auto& item : x) {
127 serialize(str, item);
128 serialize_newline(str);
129 }
130 }
131
132 template<class T, size_t Size>
serialize(std::istream & str,std::array<T,Size> & x)133 void serialize(std::istream& str, std::array<T, Size>& x)
134 {
135 size_t new_size;
136 serialize(str, new_size);
137
138 if (new_size > Size) {
139 throw SaneException("Incorrect std::array size to deserialize");
140 }
141 for (auto& item : x) {
142 serialize(str, item);
143 }
144 }
145
146 } // namespace genesys
147
148 #endif
149