ceph/src/boost/boost/archive/basic_binary_oprimitive.hpp

   1 #ifndef BOOST_ARCHIVE_BASIC_BINARY_OPRIMITIVE_HPP
   2 #define BOOST_ARCHIVE_BASIC_BINARY_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_binary_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 native binary - this should be the fastest way
  20 // to archive the state of a group of obects.  It makes no attempt to
  21 // convert to any canonical form.
  22
  23 // IN GENERAL, ARCHIVES CREATED WITH THIS CLASS WILL NOT BE READABLE
  24 // ON PLATFORM APART FROM THE ONE THEY ARE CREATE ON
  25
  26 #include <iosfwd>
  27 #include <boost/assert.hpp>
  28 #include <locale>
  29 #include <streambuf> // basic_streambuf
  30 #include <string>
  31 #include <cstddef> // size_t
  32
  33 #include <boost/config.hpp>
  34 #if defined(BOOST_NO_STDC_NAMESPACE)
  35 namespace std{
  36     using ::size_t;
  37 } // namespace std
  38 #endif
  39
  40 #include <boost/cstdint.hpp>
  41 #include <boost/integer.hpp>
  42 #include <boost/integer_traits.hpp>
  43 #include <boost/scoped_ptr.hpp>
  44 #include <boost/serialization/throw_exception.hpp>
  45
  46 #include <boost/serialization/is_bitwise_serializable.hpp>
  47 #include <boost/serialization/array_wrapper.hpp>
  48
  49 #include <boost/archive/basic_streambuf_locale_saver.hpp>
  50 #include <boost/archive/codecvt_null.hpp>
  51 #include <boost/archive/archive_exception.hpp>
  52 #include <boost/archive/detail/auto_link_archive.hpp>
  53 #include <boost/archive/detail/abi_prefix.hpp> // must be the last header
  54
  55 namespace boost {
  56 namespace archive {
  57
  58 /////////////////////////////////////////////////////////////////////////
  59 // class basic_binary_oprimitive - binary output of prmitives
  60
  61 template<class Archive, class Elem, class Tr>
  62 class BOOST_SYMBOL_VISIBLE basic_binary_oprimitive {
  63 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
  64     friend class save_access;
  65 protected:
  66 #else
  67 public:
  68 #endif
  69     std::basic_streambuf<Elem, Tr> & m_sb;
  70     // return a pointer to the most derived class
  71     Archive * This(){
  72         return static_cast<Archive *>(this);
  73     }
  74     #ifndef BOOST_NO_STD_LOCALE
  75     // note order! - if you change this, libstd++ will fail!
  76     // a) create new locale with new codecvt facet
  77     // b) save current locale
  78     // c) change locale to new one
  79     // d) use stream buffer
  80     // e) change locale back to original
  81     // f) destroy new codecvt facet
  82     boost::archive::codecvt_null<Elem> codecvt_null_facet;
  83     basic_streambuf_locale_saver<Elem, Tr> locale_saver;
  84     std::locale archive_locale;
  85     #endif
  86     // default saving of primitives.
  87     template<class T>
  88     void save(const T & t)
  89     {
  90         save_binary(& t, sizeof(T));
  91     }
  92
  93     /////////////////////////////////////////////////////////
  94     // fundamental types that need special treatment
  95
  96     // trap usage of invalid uninitialized boolean which would
  97     // otherwise crash on load.
  98     void save(const bool t){
  99         BOOST_ASSERT(0 == static_cast<int>(t) || 1 == static_cast<int>(t));
 100         save_binary(& t, sizeof(t));
 101     }
 102     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 103     save(const std::string &s);
 104     #ifndef BOOST_NO_STD_WSTRING
 105     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 106     save(const std::wstring &ws);
 107     #endif
 108     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 109     save(const char * t);
 110     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 111     save(const wchar_t * t);
 112
 113     BOOST_ARCHIVE_OR_WARCHIVE_DECL void
 114     init();
 115
 116     BOOST_ARCHIVE_OR_WARCHIVE_DECL
 117     basic_binary_oprimitive(
 118         std::basic_streambuf<Elem, Tr> & sb,
 119         bool no_codecvt
 120     );
 121     BOOST_ARCHIVE_OR_WARCHIVE_DECL
 122     ~basic_binary_oprimitive();
 123 public:
 124
 125     // we provide an optimized save for all fundamental types
 126     // typedef serialization::is_bitwise_serializable<mpl::_1>
 127     // use_array_optimization;
 128     // workaround without using mpl lambdas
 129     struct use_array_optimization {
 130         template <class T>
 131         #if defined(BOOST_NO_DEPENDENT_NESTED_DERIVATIONS)
 132             struct apply {
 133                 typedef typename boost::serialization::is_bitwise_serializable< T >::type type;
 134             };
 135         #else
 136             struct apply : public boost::serialization::is_bitwise_serializable< T > {};
 137         #endif
 138     };
 139
 140     // the optimized save_array dispatches to save_binary
 141     template <class ValueType>
 142     void save_array(boost::serialization::array_wrapper<ValueType> const& a, unsigned int)
 143     {
 144       save_binary(a.address(),a.count()*sizeof(ValueType));
 145     }
 146
 147     void save_binary(const void *address, std::size_t count);
 148 };
 149
 150 template<class Archive, class Elem, class Tr>
 151 inline void
 152 basic_binary_oprimitive<Archive, Elem, Tr>::save_binary(
 153     const void *address,
 154     std::size_t count
 155 ){
 156     // BOOST_ASSERT(count <= std::size_t(boost::integer_traits<std::streamsize>::const_max));
 157     // note: if the following assertions fail
 158     // a likely cause is that the output stream is set to "text"
 159     // mode where by cr characters recieve special treatment.
 160     // be sure that the output stream is opened with ios::binary
 161     //if(os.fail())
 162     //    boost::serialization::throw_exception(
 163     //        archive_exception(archive_exception::output_stream_error)
 164     //    );
 165     // figure number of elements to output - round up
 166     count = ( count + sizeof(Elem) - 1) / sizeof(Elem);
 167     std::streamsize scount = m_sb.sputn(
 168         static_cast<const Elem *>(address),
 169         static_cast<std::streamsize>(count)
 170     );
 171     if(count != static_cast<std::size_t>(scount))
 172         boost::serialization::throw_exception(
 173             archive_exception(archive_exception::output_stream_error)
 174         );
 175     //os.write(
 176     //    static_cast<const typename OStream::char_type *>(address),
 177     //    count
 178     //);
 179     //BOOST_ASSERT(os.good());
 180 }
 181
 182 } //namespace boost
 183 } //namespace archive
 184
 185 #include <boost/archive/detail/abi_suffix.hpp> // pop pragmas
 186
 187 #endif // BOOST_ARCHIVE_BASIC_BINARY_OPRIMITIVE_HPP