libs/serialization/example/portable_binary_oarchive.cpp

   1 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
   2 // portable_binary_oarchive.cpp
   3
   4 // (C) Copyright 2002-7 Robert Ramey - http://www.rrsd.com .
   5 // Use, modification and distribution is subject to the Boost Software
   6 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 //  See http://www.boost.org for updates, documentation, and revision history.
  10
  11 #include <ostream>
  12 #include <boost/predef/other/endian.h>
  13 #include "portable_binary_oarchive.hpp"
  14
  15 void
  16 portable_binary_oarchive::save_impl(
  17     const boost::intmax_t l,
  18     const char maxsize
  19 ){
  20     char size = 0;
  21
  22     if(l == 0){
  23         this->primitive_base_t::save(size);
  24         return;
  25     }
  26
  27     boost::intmax_t ll;
  28     bool negative = (l < 0);
  29     if(negative)
  30         ll = -l;
  31     else
  32         ll = l;
  33
  34     do{
  35         ll >>= CHAR_BIT;
  36         ++size;
  37     }while(ll != 0);
  38
  39     this->primitive_base_t::save(
  40         static_cast<char>(negative ? -size : size)
  41     );
  42
  43     if(negative)
  44         ll = -l;
  45     else
  46         ll = l;
  47     char * cptr = reinterpret_cast<char *>(& ll);
  48     #if BOOST_ENDIAN_BIG_BYTE
  49         cptr += (sizeof(boost::intmax_t) - size);
  50         if(m_flags & endian_little)
  51             reverse_bytes(size, cptr);
  52     #else
  53         if(m_flags & endian_big)
  54             reverse_bytes(size, cptr);
  55     #endif
  56     this->primitive_base_t::save_binary(cptr, size);
  57 }
  58
  59 void
  60 portable_binary_oarchive::init(unsigned int flags) {
  61     if(m_flags == (endian_big | endian_little)){
  62         boost::serialization::throw_exception(
  63             portable_binary_oarchive_exception()
  64         );
  65     }
  66     if(0 == (flags & boost::archive::no_header)){
  67         // write signature in an archive version independent manner
  68         const std::string file_signature(
  69             boost::archive::BOOST_ARCHIVE_SIGNATURE()
  70         );
  71         * this << file_signature;
  72         // write library version
  73         const boost::archive::library_version_type v(
  74             boost::archive::BOOST_ARCHIVE_VERSION()
  75         );
  76         * this << v;
  77     }
  78     save(static_cast<unsigned char>(m_flags >> CHAR_BIT));
  79 }
  80
  81 #include <boost/archive/impl/archive_serializer_map.ipp>
  82 #include <boost/archive/impl/basic_binary_oprimitive.ipp>
  83
  84 namespace boost {
  85 namespace archive {
  86
  87 namespace detail {
  88     template class archive_serializer_map<portable_binary_oarchive>;
  89 }
  90
  91 template class basic_binary_oprimitive<
  92     portable_binary_oarchive,
  93     std::ostream::char_type,
  94     std::ostream::traits_type
  95 > ;
  96
  97 } // namespace archive
  98 } // namespace boost