boost/archive/impl/basic_binary_iarchive.ipp

   1 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
   2 // basic_binary_iarchive.ipp:
   3
   4 // (C) Copyright 2002 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 #include <string>
  11 #include <boost/assert.hpp>
  12 #include <algorithm>
  13 #include <cstring>
  14
  15 #include <boost/config.hpp>
  16 #if defined(BOOST_NO_STDC_NAMESPACE)
  17 namespace std{
  18     using ::memcpy;
  19     using ::strlen;
  20     using ::size_t;
  21 }
  22 #endif
  23
  24 #include <boost/detail/workaround.hpp>
  25 #include <boost/predef/other/endian.h>
  26
  27 #include <boost/archive/basic_binary_iarchive.hpp>
  28
  29 namespace boost {
  30 namespace archive {
  31
  32 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  33 // implementation of binary_binary_archive
  34 template<class Archive>
  35 BOOST_ARCHIVE_OR_WARCHIVE_DECL void
  36 basic_binary_iarchive<Archive>::load_override(class_name_type & t){
  37     std::string cn;
  38     cn.reserve(BOOST_SERIALIZATION_MAX_KEY_SIZE);
  39     load_override(cn);
  40     if(cn.size() > (BOOST_SERIALIZATION_MAX_KEY_SIZE - 1))
  41         boost::serialization::throw_exception(
  42             archive_exception(archive_exception::invalid_class_name)
  43         );
  44     std::memcpy(t, cn.data(), cn.size());
  45     // borland tweak
  46     t.t[cn.size()] = '\0';
  47 }
  48
  49 template<class Archive>
  50 BOOST_ARCHIVE_OR_WARCHIVE_DECL void
  51 basic_binary_iarchive<Archive>::init(void){
  52     // read signature in an archive version independent manner
  53     std::string file_signature;
  54
  55     #if 0 // commented out since it interfers with derivation
  56     BOOST_TRY {
  57         std::size_t l;
  58         this->This()->load(l);
  59         if(l == std::strlen(BOOST_ARCHIVE_SIGNATURE())) {
  60             // borland de-allocator fixup
  61             #if BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(20101))
  62             if(NULL != file_signature.data())
  63             #endif
  64                 file_signature.resize(l);
  65             // note breaking a rule here - could be a problem on some platform
  66             if(0 < l)
  67                 this->This()->load_binary(&(*file_signature.begin()), l);
  68         }
  69     }
  70     BOOST_CATCH(archive_exception const &) {  // catch stream_error archive exceptions
  71         // will cause invalid_signature archive exception to be thrown below
  72         file_signature = "";
  73     }
  74     BOOST_CATCH_END
  75     #else
  76     // https://svn.boost.org/trac/boost/ticket/7301
  77     * this->This() >> file_signature;
  78     #endif
  79
  80     if(file_signature != BOOST_ARCHIVE_SIGNATURE())
  81         boost::serialization::throw_exception(
  82             archive_exception(archive_exception::invalid_signature)
  83         );
  84
  85     // make sure the version of the reading archive library can
  86     // support the format of the archive being read
  87     library_version_type input_library_version;
  88     //* this->This() >> input_library_version;
  89     {
  90         int v = 0;
  91         v = this->This()->m_sb.sbumpc();
  92         #if BOOST_ENDIAN_LITTLE_BYTE
  93         if(v < 6){
  94             ;
  95         }
  96         else
  97         if(v < 7){
  98             // version 6 - next byte should be zero
  99             this->This()->m_sb.sbumpc();
 100         }
 101         else
 102         if(v < 8){
 103             int x1;
 104             // version 7 = might be followed by zero or some other byte
 105             x1 = this->This()->m_sb.sgetc();
 106             // it's =a zero, push it back
 107             if(0 == x1)
 108                 this->This()->m_sb.sbumpc();
 109         }
 110         else{
 111             // version 8+ followed by a zero
 112             this->This()->m_sb.sbumpc();
 113         }
 114         #elif BOOST_ENDIAN_BIG_BYTE
 115         if(v == 0)
 116             v = this->This()->m_sb.sbumpc();
 117         #endif
 118         input_library_version = static_cast<library_version_type>(v);
 119     }
 120
 121     #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205))
 122     this->set_library_version(input_library_version);
 123     #else
 124     detail::basic_iarchive::set_library_version(input_library_version);
 125     #endif
 126
 127     if(BOOST_ARCHIVE_VERSION() < input_library_version)
 128         boost::serialization::throw_exception(
 129             archive_exception(archive_exception::unsupported_version)
 130         );
 131 }
 132
 133 } // namespace archive
 134 } // namespace boost