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1 | #ifndef BOOST_ARCHIVE_BASIC_TEXT_OPRIMITIVE_HPP |
2 | #define BOOST_ARCHIVE_BASIC_TEXT_OPRIMITIVE_HPP | |
3 | ||
4 | // MS compatible compilers support #pragma once | |
5 | #if defined(_MSC_VER) | |
6 | # pragma once | |
7 | #endif | |
8 | ||
9 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 | |
10 | // basic_text_oprimitive.hpp | |
11 | ||
12 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . | |
13 | // Use, modification and distribution is subject to the Boost Software | |
14 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
15 | // http://www.boost.org/LICENSE_1_0.txt) | |
16 | ||
17 | // See http://www.boost.org for updates, documentation, and revision history. | |
18 | ||
19 | // archives stored as text - note these ar templated on the basic | |
20 | // stream templates to accommodate wide (and other?) kind of characters | |
21 | // | |
22 | // note the fact that on libraries without wide characters, ostream is | |
23 | // is not a specialization of basic_ostream which in fact is not defined | |
24 | // in such cases. So we can't use basic_ostream<OStream::char_type> but rather | |
25 | // use two template parameters | |
26 | ||
27 | #include <iomanip> | |
28 | #include <locale> | |
29 | #include <cstddef> // size_t | |
30 | ||
31 | #include <boost/config.hpp> | |
32 | #include <boost/static_assert.hpp> | |
33 | #include <boost/io/ios_state.hpp> | |
34 | ||
35 | #include <boost/detail/workaround.hpp> | |
36 | #if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, == 1) | |
37 | #include <boost/archive/dinkumware.hpp> | |
38 | #endif | |
39 | ||
40 | #if defined(BOOST_NO_STDC_NAMESPACE) | |
41 | namespace std{ | |
42 | using ::size_t; | |
43 | #if ! defined(BOOST_DINKUMWARE_STDLIB) && ! defined(__SGI_STL_PORT) | |
44 | using ::locale; | |
45 | #endif | |
46 | } // namespace std | |
47 | #endif | |
48 | ||
49 | #include <boost/type_traits/is_floating_point.hpp> | |
50 | #include <boost/mpl/bool.hpp> | |
51 | #include <boost/limits.hpp> | |
52 | #include <boost/integer.hpp> | |
53 | #include <boost/io/ios_state.hpp> | |
54 | #include <boost/serialization/throw_exception.hpp> | |
55 | #include <boost/archive/basic_streambuf_locale_saver.hpp> | |
56 | #include <boost/archive/codecvt_null.hpp> | |
57 | #include <boost/archive/archive_exception.hpp> | |
58 | #include <boost/archive/detail/abi_prefix.hpp> // must be the last header | |
59 | ||
60 | namespace boost { | |
61 | namespace archive { | |
62 | ||
63 | ///////////////////////////////////////////////////////////////////////// | |
64 | // class basic_text_oprimitive - output of prmitives to stream | |
65 | template<class OStream> | |
66 | class BOOST_SYMBOL_VISIBLE basic_text_oprimitive | |
67 | { | |
68 | protected: | |
69 | OStream &os; | |
70 | io::ios_flags_saver flags_saver; | |
71 | io::ios_precision_saver precision_saver; | |
72 | ||
73 | #ifndef BOOST_NO_STD_LOCALE | |
74 | // note order! - if you change this, libstd++ will fail! | |
75 | // a) create new locale with new codecvt facet | |
76 | // b) save current locale | |
77 | // c) change locale to new one | |
78 | // d) use stream buffer | |
79 | // e) change locale back to original | |
80 | // f) destroy new codecvt facet | |
81 | boost::archive::codecvt_null<typename OStream::char_type> codecvt_null_facet; | |
82 | std::locale archive_locale; | |
83 | basic_ostream_locale_saver< | |
84 | typename OStream::char_type, | |
85 | typename OStream::traits_type | |
86 | > locale_saver; | |
87 | #endif | |
88 | ||
89 | ///////////////////////////////////////////////////////// | |
90 | // fundamental types that need special treatment | |
91 | void save(const bool t){ | |
92 | // trap usage of invalid uninitialized boolean which would | |
93 | // otherwise crash on load. | |
94 | BOOST_ASSERT(0 == static_cast<int>(t) || 1 == static_cast<int>(t)); | |
95 | if(os.fail()) | |
96 | boost::serialization::throw_exception( | |
97 | archive_exception(archive_exception::output_stream_error) | |
98 | ); | |
99 | os << t; | |
100 | } | |
101 | void save(const signed char t) | |
102 | { | |
103 | save(static_cast<short int>(t)); | |
104 | } | |
105 | void save(const unsigned char t) | |
106 | { | |
107 | save(static_cast<short unsigned int>(t)); | |
108 | } | |
109 | void save(const char t) | |
110 | { | |
111 | save(static_cast<short int>(t)); | |
112 | } | |
113 | #ifndef BOOST_NO_INTRINSIC_WCHAR_T | |
114 | void save(const wchar_t t) | |
115 | { | |
116 | BOOST_STATIC_ASSERT(sizeof(wchar_t) <= sizeof(int)); | |
117 | save(static_cast<int>(t)); | |
118 | } | |
119 | #endif | |
120 | ||
121 | ///////////////////////////////////////////////////////// | |
122 | // saving of any types not listed above | |
123 | ||
124 | template<class T> | |
125 | void save_impl(const T &t, boost::mpl::bool_<false> &){ | |
126 | if(os.fail()) | |
127 | boost::serialization::throw_exception( | |
128 | archive_exception(archive_exception::output_stream_error) | |
129 | ); | |
130 | os << t; | |
131 | } | |
132 | ||
133 | ///////////////////////////////////////////////////////// | |
134 | // floating point types need even more special treatment | |
135 | // the following determines whether the type T is some sort | |
136 | // of floating point type. Note that we then assume that | |
137 | // the stream << operator is defined on that type - if not | |
138 | // we'll get a compile time error. This is meant to automatically | |
139 | // support synthesized types which support floating point | |
140 | // operations. Also it should handle compiler dependent types | |
141 | // such long double. Due to John Maddock. | |
142 | ||
143 | template<class T> | |
144 | struct is_float { | |
145 | typedef typename mpl::bool_< | |
146 | boost::is_floating_point<T>::value | |
147 | || (std::numeric_limits<T>::is_specialized | |
148 | && !std::numeric_limits<T>::is_integer | |
149 | && !std::numeric_limits<T>::is_exact | |
150 | && std::numeric_limits<T>::max_exponent) | |
151 | >::type type; | |
152 | }; | |
153 | ||
154 | template<class T> | |
155 | void save_impl(const T &t, boost::mpl::bool_<true> &){ | |
156 | // must be a user mistake - can't serialize un-initialized data | |
157 | if(os.fail()) | |
158 | boost::serialization::throw_exception( | |
159 | archive_exception(archive_exception::output_stream_error) | |
160 | ); | |
161 | // The formulae for the number of decimla digits required is given in | |
162 | // http://www2.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1822.pdf | |
163 | // which is derived from Kahan's paper: | |
164 | // www.eecs.berkeley.edu/~wkahan/ieee754status/ieee754.ps | |
165 | // const unsigned int digits = (std::numeric_limits<T>::digits * 3010) / 10000; | |
166 | // note: I've commented out the above because I didn't get good results. e.g. | |
167 | // in one case I got a difference of 19 units. | |
168 | #ifndef BOOST_NO_CXX11_NUMERIC_LIMITS | |
169 | const unsigned int digits = std::numeric_limits<T>::max_digits10; | |
170 | #else | |
171 | const unsigned int digits = std::numeric_limits<T>::digits10 + 2; | |
172 | #endif | |
173 | os << std::setprecision(digits) << std::scientific << t; | |
174 | } | |
175 | ||
176 | template<class T> | |
177 | void save(const T & t){ | |
178 | boost::io::ios_flags_saver fs(os); | |
179 | boost::io::ios_precision_saver ps(os); | |
180 | typename is_float<T>::type tf; | |
181 | save_impl(t, tf); | |
182 | } | |
183 | ||
184 | BOOST_ARCHIVE_OR_WARCHIVE_DECL | |
185 | basic_text_oprimitive(OStream & os, bool no_codecvt); | |
186 | BOOST_ARCHIVE_OR_WARCHIVE_DECL | |
187 | ~basic_text_oprimitive(); | |
188 | public: | |
189 | // unformatted append of one character | |
190 | void put(typename OStream::char_type c){ | |
191 | if(os.fail()) | |
192 | boost::serialization::throw_exception( | |
193 | archive_exception(archive_exception::output_stream_error) | |
194 | ); | |
195 | os.put(c); | |
196 | } | |
197 | // unformatted append of null terminated string | |
198 | void put(const char * s){ | |
199 | while('\0' != *s) | |
200 | os.put(*s++); | |
201 | } | |
202 | BOOST_ARCHIVE_OR_WARCHIVE_DECL void | |
203 | save_binary(const void *address, std::size_t count); | |
204 | }; | |
205 | ||
206 | } //namespace boost | |
207 | } //namespace archive | |
208 | ||
209 | #include <boost/archive/detail/abi_suffix.hpp> // pops abi_suffix.hpp pragmas | |
210 | ||
211 | #endif // BOOST_ARCHIVE_BASIC_TEXT_OPRIMITIVE_HPP |