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/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
  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>
  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
 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>
 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
 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