1 #ifndef BOOST_ARCHIVE_BINARY_IPRIMITIVE_HPP
2 #define BOOST_ARCHIVE_BINARY_IPRIMITIVE_HPP
3 
4 // MS compatible compilers support #pragma once
5 #if defined(_MSC_VER)
6 # pragma once
7 #endif
8 
9 #if defined(_MSC_VER)
10 #pragma warning( disable : 4800 )
11 #endif
12 
13 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
14 // basic_binary_iprimitive.hpp
15 //
16 // archives stored as native binary - this should be the fastest way
17 // to archive the state of a group of obects.  It makes no attempt to
18 // convert to any canonical form.
19 
20 // IN GENERAL, ARCHIVES CREATED WITH THIS CLASS WILL NOT BE READABLE
21 // ON PLATFORM APART FROM THE ONE THEY ARE CREATED ON
22 
23 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
24 // Use, modification and distribution is subject to the Boost Software
25 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
26 // http://www.boost.org/LICENSE_1_0.txt)
27 
28 //  See http://www.boost.org for updates, documentation, and revision history.
29 
30 #include <iosfwd>
31 #include <boost/assert.hpp>
32 #include <locale>
33 #include <cstring> // std::memcpy
34 #include <cstddef> // std::size_t
35 #include <streambuf> // basic_streambuf
36 #include <string>
37 
38 #include <boost/config.hpp>
39 #if defined(BOOST_NO_STDC_NAMESPACE)
40 namespace std{
41     using ::memcpy;
42     using ::size_t;
43 } // namespace std
44 #endif
45 
46 #include <boost/cstdint.hpp>
47 #include <boost/serialization/throw_exception.hpp>
48 #include <boost/integer.hpp>
49 #include <boost/integer_traits.hpp>
50 
51 #include <boost/serialization/is_bitwise_serializable.hpp>
52 #include <boost/serialization/array_wrapper.hpp>
53 
54 #include <boost/archive/basic_streambuf_locale_saver.hpp>
55 #include <boost/archive/codecvt_null.hpp>
56 #include <boost/archive/archive_exception.hpp>
57 #include <boost/archive/detail/auto_link_archive.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 binary_iarchive - read serialized objects from a input binary stream
65 template<class Archive, class Elem, class Tr>
66 class BOOST_SYMBOL_VISIBLE basic_binary_iprimitive {
67 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
68     friend class load_access;
69 protected:
70 #else
71 public:
72 #endif
73     std::basic_streambuf<Elem, Tr> & m_sb;
74     // return a pointer to the most derived class
This()75     Archive * This(){
76         return static_cast<Archive *>(this);
77     }
78 
79     #ifndef BOOST_NO_STD_LOCALE
80     // note order! - if you change this, libstd++ will fail!
81     // a) create new locale with new codecvt facet
82     // b) save current locale
83     // c) change locale to new one
84     // d) use stream buffer
85     // e) change locale back to original
86     // f) destroy new codecvt facet
87     boost::archive::codecvt_null<Elem> codecvt_null_facet;
88     basic_streambuf_locale_saver<Elem, Tr> locale_saver;
89     std::locale archive_locale;
90     #endif
91 
92     // main template for serilization of primitive types
93     template<class T>
load(T & t)94     void load(T & t){
95         load_binary(& t, sizeof(T));
96     }
97 
98     /////////////////////////////////////////////////////////
99     // fundamental types that need special treatment
100 
101     // trap usage of invalid uninitialized boolean
load(bool & t)102     void load(bool & t){
103         load_binary(& t, sizeof(t));
104         int i = t;
105         BOOST_ASSERT(0 == i || 1 == i);
106         (void)i; // warning suppression for release builds.
107     }
108     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
109     load(std::string &s);
110     #ifndef BOOST_NO_STD_WSTRING
111     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
112     load(std::wstring &ws);
113     #endif
114     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
115     load(char * t);
116     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
117     load(wchar_t * t);
118 
119     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
120     init();
121     BOOST_ARCHIVE_OR_WARCHIVE_DECL
122     basic_binary_iprimitive(
123         std::basic_streambuf<Elem, Tr> & sb,
124         bool no_codecvt
125     );
126     BOOST_ARCHIVE_OR_WARCHIVE_DECL
127     ~basic_binary_iprimitive();
128 public:
129     // we provide an optimized load for all fundamental types
130     // typedef serialization::is_bitwise_serializable<mpl::_1>
131     // use_array_optimization;
132     struct use_array_optimization {
133         template <class T>
134         #if defined(BOOST_NO_DEPENDENT_NESTED_DERIVATIONS)
135             struct apply {
136                 typedef typename boost::serialization::is_bitwise_serializable< T >::type type;
137             };
138         #else
139             struct apply : public boost::serialization::is_bitwise_serializable< T > {};
140         #endif
141     };
142 
143     // the optimized load_array dispatches to load_binary
144     template <class ValueType>
load_array(serialization::array_wrapper<ValueType> & a,unsigned int)145     void load_array(serialization::array_wrapper<ValueType>& a, unsigned int)
146     {
147       load_binary(a.address(),a.count()*sizeof(ValueType));
148     }
149 
150     void
151     load_binary(void *address, std::size_t count);
152 };
153 
154 template<class Archive, class Elem, class Tr>
155 inline void
load_binary(void * address,std::size_t count)156 basic_binary_iprimitive<Archive, Elem, Tr>::load_binary(
157     void *address,
158     std::size_t count
159 ){
160     // note: an optimizer should eliminate the following for char files
161     BOOST_ASSERT(
162         static_cast<std::streamsize>(count / sizeof(Elem))
163         <= boost::integer_traits<std::streamsize>::const_max
164     );
165     std::streamsize s = static_cast<std::streamsize>(count / sizeof(Elem));
166     std::streamsize scount = m_sb.sgetn(
167         static_cast<Elem *>(address),
168         s
169     );
170     if(scount != s)
171         boost::serialization::throw_exception(
172             archive_exception(archive_exception::input_stream_error)
173         );
174     // note: an optimizer should eliminate the following for char files
175     BOOST_ASSERT(count % sizeof(Elem) <= boost::integer_traits<std::streamsize>::const_max);
176     s = static_cast<std::streamsize>(count % sizeof(Elem));
177     if(0 < s){
178 //        if(is.fail())
179 //            boost::serialization::throw_exception(
180 //                archive_exception(archive_exception::stream_error)
181 //        );
182         Elem t;
183         scount = m_sb.sgetn(& t, 1);
184         if(scount != 1)
185             boost::serialization::throw_exception(
186                 archive_exception(archive_exception::input_stream_error)
187             );
188         std::memcpy(static_cast<char*>(address) + (count - s), &t, static_cast<std::size_t>(s));
189     }
190 }
191 
192 } // namespace archive
193 } // namespace boost
194 
195 #include <boost/archive/detail/abi_suffix.hpp> // pop pragmas
196 
197 #endif // BOOST_ARCHIVE_BINARY_IPRIMITIVE_HPP
198