ceph/src/boost/boost/archive/basic_binary_iprimitive.hpp

   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/mpl/placeholders.hpp>
  52 #include <boost/serialization/is_bitwise_serializable.hpp>
  53 #include <boost/serialization/array_wrapper.hpp>
  54
  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/auto_link_archive.hpp>
  59 #include <boost/archive/detail/abi_prefix.hpp> // must be the last header
  60
  61 namespace boost {
  62 namespace archive {
  63
  64 /////////////////////////////////////////////////////////////////////////////
  65 // class binary_iarchive - read serialized objects from a input binary stream
  66 template<class Archive, class Elem, class Tr>
  67 class BOOST_SYMBOL_VISIBLE basic_binary_iprimitive {
  68 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
  69     friend class load_access;
  70 protected:
  71 #else
  72 public:
  73 #endif
  74     std::basic_streambuf<Elem, Tr> & m_sb;
  75     // return a pointer to the most derived class
  76     Archive * This(){
  77         return static_cast<Archive *>(this);
  78     }
  79
  80     #ifndef BOOST_NO_STD_LOCALE
  81     // note order! - if you change this, libstd++ will fail!
  82     // a) create new locale with new codecvt facet
  83     // b) save current locale
  84     // c) change locale to new one
  85     // d) use stream buffer
  86     // e) change locale back to original
  87     // f) destroy new codecvt facet
  88     boost::archive::codecvt_null<Elem> codecvt_null_facet;
  89     basic_streambuf_locale_saver<Elem, Tr> locale_saver;
  90     std::locale archive_locale;
  91     #endif
  92
  93     // main template for serilization of primitive types
  94     template<class T>
  95     void load(T & t){
  96         load_binary(& t, sizeof(T));
  97     }
  98
  99     /////////////////////////////////////////////////////////
 100     // fundamental types that need special treatment
 101
 102     // trap usage of invalid uninitialized boolean
 103     void load(bool & t){
 104         load_binary(& t, sizeof(t));
 105         int i = t;
 106         BOOST_ASSERT(0 == i || 1 == i);
 107         (void)i; // warning suppression for release builds.
 108     }
 109     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 110     load(std::string &s);
 111     #ifndef BOOST_NO_STD_WSTRING
 112     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 113     load(std::wstring &ws);
 114     #endif
 115     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 116     load(char * t);
 117     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 118     load(wchar_t * t);
 119
 120     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 121     init();
 122     BOOST_ARCHIVE_OR_WARCHIVE_DECL
 123     basic_binary_iprimitive(
 124         std::basic_streambuf<Elem, Tr> & sb,
 125         bool no_codecvt
 126     );
 127     BOOST_ARCHIVE_OR_WARCHIVE_DECL
 128     ~basic_binary_iprimitive();
 129 public:
 130     // we provide an optimized load for all fundamental types
 131     // typedef serialization::is_bitwise_serializable<mpl::_1>
 132     // use_array_optimization;
 133     struct use_array_optimization {
 134         template <class T>
 135         #if defined(BOOST_NO_DEPENDENT_NESTED_DERIVATIONS)
 136             struct apply {
 137                 typedef typename boost::serialization::is_bitwise_serializable< T >::type type;
 138             };
 139         #else
 140             struct apply : public boost::serialization::is_bitwise_serializable< T > {};
 141         #endif
 142     };
 143
 144     // the optimized load_array dispatches to load_binary
 145     template <class ValueType>
 146     void load_array(serialization::array_wrapper<ValueType>& a, unsigned int)
 147     {
 148       load_binary(a.address(),a.count()*sizeof(ValueType));
 149     }
 150
 151     void
 152     load_binary(void *address, std::size_t count);
 153 };
 154
 155 template<class Archive, class Elem, class Tr>
 156 inline void
 157 basic_binary_iprimitive<Archive, Elem, Tr>::load_binary(
 158     void *address,
 159     std::size_t count
 160 ){
 161     // note: an optimizer should eliminate the following for char files
 162     BOOST_ASSERT(
 163         static_cast<std::streamsize>(count / sizeof(Elem))
 164         <= boost::integer_traits<std::streamsize>::const_max
 165     );
 166     std::streamsize s = static_cast<std::streamsize>(count / sizeof(Elem));
 167     std::streamsize scount = m_sb.sgetn(
 168         static_cast<Elem *>(address),
 169         s
 170     );
 171     if(scount != s)
 172         boost::serialization::throw_exception(
 173             archive_exception(archive_exception::input_stream_error)
 174         );
 175     // note: an optimizer should eliminate the following for char files
 176     BOOST_ASSERT(count % sizeof(Elem) <= boost::integer_traits<std::streamsize>::const_max);
 177     s = static_cast<std::streamsize>(count % sizeof(Elem));
 178     if(0 < s){
 179 //        if(is.fail())
 180 //            boost::serialization::throw_exception(
 181 //                archive_exception(archive_exception::stream_error)
 182 //        );
 183         Elem t;
 184         scount = m_sb.sgetn(& t, 1);
 185         if(scount != 1)
 186             boost::serialization::throw_exception(
 187                 archive_exception(archive_exception::input_stream_error)
 188             );
 189         std::memcpy(static_cast<char*>(address) + (count - s), &t, static_cast<std::size_t>(s));
 190     }
 191 }
 192
 193 } // namespace archive
 194 } // namespace boost
 195
 196 #include <boost/archive/detail/abi_suffix.hpp> // pop pragmas
 197
 198 #endif // BOOST_ARCHIVE_BINARY_IPRIMITIVE_HPP