1 // udt_conversion_example.cpp --------------------------------------------------------//
2
3 // Copyright Beman Dawes 2013
4
5 // Distributed under the Boost Software License, Version 1.0.
6 // http://www.boost.org/LICENSE_1_0.txt
7
8 //--------------------------------------------------------------------------------------//
9
10 #include <boost/endian/detail/disable_warnings.hpp>
11
12 #include <boost/endian/conversion.hpp>
13 #include <iostream>
14 #include <cstring>
15
16 using namespace boost::endian;
17 using std::cout;
18 using std::endl;
19 using boost::int32_t;
20 using boost::int64_t;
21
22 namespace user
23 {
24 class UDT
25 {
26 public:
UDT()27 UDT() : id_(0), value_(0) {desc_[0] = '\0';}
UDT(int32_t id,int64_t value,const char * desc)28 UDT(int32_t id, int64_t value, const char* desc) : id_(id), value_(value)
29 {
30 std::strncpy(desc_, desc, sizeof(desc_)-1);
31 desc_[sizeof(desc_)-1] = '\0';
32 }
id() const33 int32_t id() const {return id_;}
value() const34 int64_t value() const {return value_;}
desc() const35 const char* desc() const {return desc_;}
id(int32_t x)36 void id(int32_t x) {id_ = x;}
value(int64_t v)37 void value(int64_t v) {value_ = v;}
desc(const char * s)38 void desc(const char* s)
39 {
40 std::strncpy(desc_, s, sizeof(desc_)-1);
41 desc_[sizeof(desc_-1)] = '\0';
42 }
43
44 friend void endian_reverse_inplace(UDT&);
45
46 private:
47 int32_t id_;
48 int64_t value_;
49 char desc_[56]; // '/0'
50 };
51
endian_reverse_inplace(UDT & x)52 void endian_reverse_inplace(UDT& x)
53 {
54 boost::endian::endian_reverse_inplace(x.id_);
55 boost::endian::endian_reverse_inplace(x.value_);
56 }
57 }
58
main(int,char * [])59 int main(int, char* [])
60 {
61 user::UDT x(1, 123456789012345LL, "Bingo!");
62
63 //cout << std::hex;
64 cout << "(1) " << x.id() << ' ' << x.value() << ' ' << x.desc() << endl;
65
66 user::endian_reverse_inplace(x);
67 cout << "(2) " << x.id() << ' ' << x.value() << ' ' << x.desc() << endl;
68
69 endian_reverse_inplace(x);
70 cout << "(3) " << x.id() << ' ' << x.value() << ' ' << x.desc() << endl;
71
72 conditional_reverse_inplace<order::little, order::big>(x);
73 cout << "(4) " << x.id() << ' ' << x.value() << ' ' << x.desc() << endl;
74
75 conditional_reverse_inplace(x, order::big, order::little);
76 cout << "(5) " << x.id() << ' ' << x.value() << ' ' << x.desc() << endl;
77 }
78
79 #include <boost/endian/detail/disable_warnings_pop.hpp>
80