1 // Boost uuid_io.hpp header file ----------------------------------------------//
2
3 // Copyright 2009 Andy Tompkins.
4 // Distributed under the Boost Software License, Version 1.0. (See
5 // accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt)
7
8 // Revision History
9 // 20 Mar 2009 - Initial Revision
10 // 28 Nov 2009 - disabled deprecated warnings for MSVC
11
12 #ifndef BOOST_UUID_IO_HPP
13 #define BOOST_UUID_IO_HPP
14
15 #include <boost/uuid/uuid.hpp>
16 #include <ios>
17 #include <ostream>
18 #include <istream>
19 #include <boost/io/ios_state.hpp>
20 #include <locale>
21 #include <algorithm>
22
23 #if defined(_MSC_VER)
24 #pragma warning(push) // Save warning settings.
25 #pragma warning(disable : 4996) // Disable deprecated std::ctype<char>::widen, std::copy
26 #endif
27
28 namespace boost {
29 namespace uuids {
30
31 template <typename ch, typename char_traits>
operator <<(std::basic_ostream<ch,char_traits> & os,uuid const & u)32 std::basic_ostream<ch, char_traits>& operator<<(std::basic_ostream<ch, char_traits> &os, uuid const& u)
33 {
34 io::ios_flags_saver flags_saver(os);
35 io::basic_ios_fill_saver<ch, char_traits> fill_saver(os);
36
37 const typename std::basic_ostream<ch, char_traits>::sentry ok(os);
38 if (ok) {
39 const std::streamsize width = os.width(0);
40 const std::streamsize uuid_width = 36;
41 const std::ios_base::fmtflags flags = os.flags();
42 const typename std::basic_ios<ch, char_traits>::char_type fill = os.fill();
43 if (flags & (std::ios_base::right | std::ios_base::internal)) {
44 for (std::streamsize i=uuid_width; i<width; i++) {
45 os << fill;
46 }
47 }
48
49 os << std::hex;
50 os.fill(os.widen('0'));
51
52 std::size_t i=0;
53 for (uuid::const_iterator i_data = u.begin(); i_data!=u.end(); ++i_data, ++i) {
54 os.width(2);
55 os << static_cast<unsigned int>(*i_data);
56 if (i == 3 || i == 5 || i == 7 || i == 9) {
57 os << os.widen('-');
58 }
59 }
60
61 if (flags & std::ios_base::left) {
62 for (std::streamsize s=uuid_width; s<width; s++) {
63 os << fill;
64 }
65 }
66
67 os.width(0); //used the width so reset it
68 }
69 return os;
70 }
71
72 template <typename ch, typename char_traits>
operator >>(std::basic_istream<ch,char_traits> & is,uuid & u)73 std::basic_istream<ch, char_traits>& operator>>(std::basic_istream<ch, char_traits> &is, uuid &u)
74 {
75 const typename std::basic_istream<ch, char_traits>::sentry ok(is);
76 if (ok) {
77 unsigned char data[16];
78
79 typedef std::ctype<ch> ctype_t;
80 ctype_t const& ctype = std::use_facet<ctype_t>(is.getloc());
81
82 ch xdigits[16];
83 {
84 char szdigits[] = "0123456789ABCDEF";
85 ctype.widen(szdigits, szdigits+16, xdigits);
86 }
87 ch*const xdigits_end = xdigits+16;
88
89 ch c;
90 for (std::size_t i=0; i<u.size() && is; ++i) {
91 is >> c;
92 c = ctype.toupper(c);
93
94 ch* f = std::find(xdigits, xdigits_end, c);
95 if (f == xdigits_end) {
96 is.setstate(std::ios_base::failbit);
97 break;
98 }
99
100 unsigned char byte = static_cast<unsigned char>(std::distance(&xdigits[0], f));
101
102 is >> c;
103 c = ctype.toupper(c);
104 f = std::find(xdigits, xdigits_end, c);
105 if (f == xdigits_end) {
106 is.setstate(std::ios_base::failbit);
107 break;
108 }
109
110 byte <<= 4;
111 byte |= static_cast<unsigned char>(std::distance(&xdigits[0], f));
112
113 data[i] = byte;
114
115 if (is) {
116 if (i == 3 || i == 5 || i == 7 || i == 9) {
117 is >> c;
118 if (c != is.widen('-')) is.setstate(std::ios_base::failbit);
119 }
120 }
121 }
122
123 if (is) {
124 std::copy(data, data+16, u.begin());
125 }
126 }
127 return is;
128 }
129
130 namespace detail {
to_char(size_t i)131 inline char to_char(size_t i) {
132 if (i <= 9) {
133 return static_cast<char>('0' + i);
134 } else {
135 return static_cast<char>('a' + (i-10));
136 }
137 }
138
to_wchar(size_t i)139 inline wchar_t to_wchar(size_t i) {
140 if (i <= 9) {
141 return static_cast<wchar_t>(L'0' + i);
142 } else {
143 return static_cast<wchar_t>(L'a' + (i-10));
144 }
145 }
146
147 } // namespace detail
148
to_string(uuid const & u)149 inline std::string to_string(uuid const& u)
150 {
151 std::string result;
152 result.reserve(36);
153
154 std::size_t i=0;
155 for (uuid::const_iterator it_data = u.begin(); it_data!=u.end(); ++it_data, ++i) {
156 const size_t hi = ((*it_data) >> 4) & 0x0F;
157 result += detail::to_char(hi);
158
159 const size_t lo = (*it_data) & 0x0F;
160 result += detail::to_char(lo);
161
162 if (i == 3 || i == 5 || i == 7 || i == 9) {
163 result += '-';
164 }
165 }
166 return result;
167 }
168
169 #ifndef BOOST_NO_STD_WSTRING
to_wstring(uuid const & u)170 inline std::wstring to_wstring(uuid const& u)
171 {
172 std::wstring result;
173 result.reserve(36);
174
175 std::size_t i=0;
176 for (uuid::const_iterator it_data = u.begin(); it_data!=u.end(); ++it_data, ++i) {
177 const size_t hi = ((*it_data) >> 4) & 0x0F;
178 result += detail::to_wchar(hi);
179
180 const size_t lo = (*it_data) & 0x0F;
181 result += detail::to_wchar(lo);
182
183 if (i == 3 || i == 5 || i == 7 || i == 9) {
184 result += L'-';
185 }
186 }
187 return result;
188 }
189
190 #endif
191
192 }} //namespace boost::uuids
193
194 #if defined(_MSC_VER)
195 #pragma warning(pop) // Restore warnings to previous state.
196 #endif
197
198 #endif // BOOST_UUID_IO_HPP
199