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c1fa4a7f8c
When no little/big endian flag is given to the writer, it stores data in host endianness. When loading, if no flag is set, it also assumes host endianness. This works as long as the loading and writing are done on machines with the same endianness. We change this to default to little endian when saving. This will cause the loader to see the little endian flag, and swap endianness when loading on a big endian machine. Similarly, writing on a big endian machine will swap on save, and a little endian machine will load little endian data.
321 lines
9.5 KiB
C++
321 lines
9.5 KiB
C++
#ifndef PORTABLE_BINARY_OARCHIVE_HPP
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#define PORTABLE_BINARY_OARCHIVE_HPP
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#if defined(_MSC_VER)
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#pragma warning( push )
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#pragma warning( disable : 4244 )
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#endif
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// portable_binary_oarchive.hpp
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// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org for updates, documentation, and revision history.
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#include <ostream>
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#include <boost/version.hpp>
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#include <boost/serialization/string.hpp>
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#include <boost/archive/archive_exception.hpp>
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#include <boost/archive/basic_binary_oprimitive.hpp>
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#include <boost/archive/detail/common_oarchive.hpp>
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#include <boost/archive/detail/register_archive.hpp>
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#include <boost/archive/portable_binary_archive.hpp>
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#include <boost/archive/impl/basic_binary_oprimitive.ipp>
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namespace boost { namespace archive {
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// exception to be thrown if integer read from archive doesn't fit
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// variable being loaded
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class portable_binary_oarchive_exception :
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public boost::archive::archive_exception
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{
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public:
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enum exception_code {
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invalid_flags
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} m_exception_code ;
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portable_binary_oarchive_exception(exception_code c = invalid_flags ) :
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boost::archive::archive_exception(boost::archive::archive_exception::other_exception),
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m_exception_code(c)
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{}
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virtual const char *what( ) const throw( )
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{
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const char *msg = "programmer error";
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switch(m_exception_code){
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case invalid_flags:
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msg = "cannot be both big and little endian";
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break;
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default:
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msg = boost::archive::archive_exception::what();
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assert(false);
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break;
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}
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return msg;
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}
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};
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// "Portable" output binary archive. This is a variation of the native binary
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// archive. it addresses integer size and endienness so that binary archives can
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// be passed across systems. Note:floating point types not addressed here
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class portable_binary_oarchive :
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public boost::archive::basic_binary_oprimitive<
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portable_binary_oarchive,
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std::ostream::char_type,
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std::ostream::traits_type
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>,
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public boost::archive::detail::common_oarchive<
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portable_binary_oarchive
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>
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{
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typedef boost::archive::basic_binary_oprimitive<
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portable_binary_oarchive,
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std::ostream::char_type,
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std::ostream::traits_type
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> primitive_base_t;
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typedef boost::archive::detail::common_oarchive<
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portable_binary_oarchive
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> archive_base_t;
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#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
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public:
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#else
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friend archive_base_t;
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friend primitive_base_t; // since with override save below
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friend class boost::archive::detail::interface_oarchive<
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portable_binary_oarchive
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>;
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friend class boost::archive::save_access;
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protected:
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#endif
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unsigned int m_flags;
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void save_impl(const boost::intmax_t l, const char maxsize);
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// add base class to the places considered when matching
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// save function to a specific set of arguments. Note, this didn't
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// work on my MSVC 7.0 system so we use the sure-fire method below
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// using archive_base_t::save;
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// default fall through for any types not specified here
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template<class T>
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void save(const T & t){
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save_impl(t, sizeof(T));
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}
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void save(const std::string & t){
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this->primitive_base_t::save(t);
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}
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#ifndef BOOST_NO_STD_WSTRING
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void save(const std::wstring & t){
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this->primitive_base_t::save(t);
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}
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#endif
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void save(const float & t){
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this->primitive_base_t::save(t);
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// floats not supported
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//BOOST_STATIC_ASSERT(false);
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}
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void save(const double & t){
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this->primitive_base_t::save(t);
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// doubles not supported
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//BOOST_STATIC_ASSERT(false);
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}
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void save(const char & t){
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this->primitive_base_t::save(t);
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}
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void save(const unsigned char & t){
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this->primitive_base_t::save(t);
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}
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// default processing - kick back to base class. Note the
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// extra stuff to get it passed borland compilers
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typedef boost::archive::detail::common_oarchive<portable_binary_oarchive>
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detail_common_oarchive;
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#if BOOST_VERSION > 105800
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template<class T>
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void save_override(T & t){
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this->detail_common_oarchive::save_override(t);
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}
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// explicitly convert to char * to avoid compile ambiguities
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void save_override(const boost::archive::class_name_type & t){
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const std::string s(t);
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* this << s;
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}
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// binary files don't include the optional information
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void save_override(
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const boost::archive::class_id_optional_type & /* t */
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){}
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#else
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template<class T>
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void save_override(T & t, int){
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this->detail_common_oarchive::save_override(t, 0);
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}
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// explicitly convert to char * to avoid compile ambiguities
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void save_override(const boost::archive::class_name_type & t, int){
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const std::string s(t);
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* this << s;
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}
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// binary files don't include the optional information
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void save_override(
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const boost::archive::class_id_optional_type & /* t */, int
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){}
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#endif
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void init(unsigned int flags);
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public:
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portable_binary_oarchive(std::ostream & os, unsigned flags = endian_little) :
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primitive_base_t(
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* os.rdbuf(),
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0 != (flags & boost::archive::no_codecvt)
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),
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archive_base_t(flags),
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m_flags(flags & (endian_big | endian_little))
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{
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init(flags);
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}
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portable_binary_oarchive(
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std::basic_streambuf<
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std::ostream::char_type,
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std::ostream::traits_type
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> & bsb,
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unsigned int flags
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) :
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primitive_base_t(
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bsb,
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0 != (flags & boost::archive::no_codecvt)
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),
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archive_base_t(flags),
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m_flags(0)
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{
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init(flags);
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}
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};
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} }
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// required by export in boost version > 1.34
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#ifdef BOOST_SERIALIZATION_REGISTER_ARCHIVE
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BOOST_SERIALIZATION_REGISTER_ARCHIVE(portable_binary_oarchive)
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#endif
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// required by export in boost <= 1.34
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#define BOOST_ARCHIVE_CUSTOM_OARCHIVE_TYPES portable_binary_oarchive
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// portable_binary_oarchive.cpp
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// (C) Copyright 2002-7 Robert Ramey - http://www.rrsd.com .
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org for updates, documentation, and revision history.
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#include <ostream>
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#include <boost/predef/other/endian.h>
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namespace boost { namespace archive {
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inline void
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portable_binary_oarchive::save_impl(
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const boost::intmax_t l,
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const char maxsize
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){
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signed char size = 0;
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if(l == 0){
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this->primitive_base_t::save(size);
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return;
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}
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boost::intmax_t ll;
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bool negative = (l < 0);
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if(negative)
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ll = -l;
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else
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ll = l;
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do{
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ll >>= CHAR_BIT;
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++size;
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}while(ll != 0);
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this->primitive_base_t::save(
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static_cast<signed char>(negative ? -size : size)
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);
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if(negative)
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ll = -l;
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else
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ll = l;
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char * cptr = reinterpret_cast<char *>(& ll);
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#if BOOST_ENDIAN_BIG_BYTE
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cptr += (sizeof(boost::intmax_t) - size);
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if(m_flags & endian_little)
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reverse_bytes(size, cptr);
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#else
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if(m_flags & endian_big)
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reverse_bytes(size, cptr);
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#endif
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this->primitive_base_t::save_binary(cptr, size);
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}
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inline void
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portable_binary_oarchive::init(unsigned int flags) {
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if(m_flags == (endian_big | endian_little)){
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boost::serialization::throw_exception(
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portable_binary_oarchive_exception()
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);
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}
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if(0 == (flags & boost::archive::no_header)){
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// write signature in an archive version independent manner
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const std::string file_signature(
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boost::archive::BOOST_ARCHIVE_SIGNATURE()
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);
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* this << file_signature;
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// ignore archive version checking
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const boost::archive::library_version_type v{};
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/*
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// write library version
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const boost::archive::library_version_type v(
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boost::archive::BOOST_ARCHIVE_VERSION()
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);
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*/
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* this << v;
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}
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save(static_cast<unsigned char>(m_flags >> CHAR_BIT));
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}
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} }
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namespace boost {
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namespace archive {
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namespace detail {
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template class archive_serializer_map<portable_binary_oarchive>;
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}
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// template class basic_binary_oprimitive<
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// portable_binary_oarchive,
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// std::ostream::char_type,
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// std::ostream::traits_type
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// > ;
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} // namespace archive
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} // namespace boost
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#if defined(_MSC_VER)
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#pragma warning( pop )
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#endif
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#endif // PORTABLE_BINARY_OARCHIVE_HPP
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