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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.
376 lines
12 KiB
C++
376 lines
12 KiB
C++
#ifndef PORTABLE_BINARY_IARCHIVE_HPP
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#define PORTABLE_BINARY_IARCHIVE_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_iarchive.hpp
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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 <istream>
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#include <boost/version.hpp>
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#include <boost/serialization/string.hpp>
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#include <boost/serialization/item_version_type.hpp>
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#include <boost/archive/archive_exception.hpp>
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#include <boost/archive/basic_binary_iprimitive.hpp>
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#include <boost/archive/detail/common_iarchive.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_iprimitive.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_iarchive_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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incompatible_integer_size
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} m_exception_code ;
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portable_binary_iarchive_exception(exception_code c = incompatible_integer_size ) :
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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 incompatible_integer_size:
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msg = "integer cannot be represented";
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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" input binary archive. It addresses integer size and endienness so
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// that binary archives can be passed across systems. Note:floating point types
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// not addressed here
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class portable_binary_iarchive :
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public boost::archive::basic_binary_iprimitive<
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portable_binary_iarchive,
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std::istream::char_type,
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std::istream::traits_type
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>,
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public boost::archive::detail::common_iarchive<
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portable_binary_iarchive
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>
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{
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typedef boost::archive::basic_binary_iprimitive<
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portable_binary_iarchive,
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std::istream::char_type,
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std::istream::traits_type
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> primitive_base_t;
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typedef boost::archive::detail::common_iarchive<
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portable_binary_iarchive
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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 load below
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friend class boost::archive::detail::interface_iarchive<
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portable_binary_iarchive
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>;
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friend class boost::archive::load_access;
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protected:
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#endif
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unsigned int m_flags;
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void load_impl(boost::intmax_t & l, char maxsize);
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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 load(T & t){
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boost::intmax_t l;
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load_impl(l, sizeof(T));
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// use cast to avoid compile time warning
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//t = static_cast< T >(l);
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t = T(l);
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}
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void load(boost::serialization::item_version_type & t){
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boost::intmax_t l;
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load_impl(l, sizeof(boost::serialization::item_version_type));
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// use cast to avoid compile time warning
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t = boost::serialization::item_version_type(l);
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}
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void load(boost::archive::version_type & t){
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boost::intmax_t l;
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load_impl(l, sizeof(boost::archive::version_type));
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// use cast to avoid compile time warning
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t = boost::archive::version_type(l);
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}
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void load(boost::archive::class_id_type & t){
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boost::intmax_t l;
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load_impl(l, sizeof(boost::archive::class_id_type));
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// use cast to avoid compile time warning
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t = boost::archive::class_id_type(static_cast<int>(l));
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}
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void load(std::string & t){
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this->primitive_base_t::load(t);
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}
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#ifndef BOOST_NO_STD_WSTRING
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void load(std::wstring & t){
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this->primitive_base_t::load(t);
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}
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#endif
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void load(float & t){
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this->primitive_base_t::load(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 load(double & t){
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this->primitive_base_t::load(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 load(char & t){
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this->primitive_base_t::load(t);
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}
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void load(unsigned char & t){
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this->primitive_base_t::load(t);
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}
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typedef boost::archive::detail::common_iarchive<portable_binary_iarchive>
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detail_common_iarchive;
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#if BOOST_VERSION > 105800
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template<class T>
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void load_override(T & t){
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this->detail_common_iarchive::load_override(t);
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}
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void load_override(boost::archive::class_name_type & t);
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// binary files don't include the optional information
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void load_override(boost::archive::class_id_optional_type &){}
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#else
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template<class T>
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void load_override(T & t, int){
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this->detail_common_iarchive::load_override(t, 0);
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}
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void load_override(boost::archive::class_name_type & t, int);
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// binary files don't include the optional information
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void load_override(boost::archive::class_id_optional_type &, int){}
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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_iarchive(std::istream & is, unsigned flags = 0) :
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primitive_base_t(
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* is.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(0)
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{
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init(flags);
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}
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portable_binary_iarchive(
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std::basic_streambuf<
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std::istream::char_type,
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std::istream::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_iarchive)
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#endif
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// required by export in boost <= 1.34
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#define BOOST_ARCHIVE_CUSTOM_IARCHIVE_TYPES portable_binary_iarchive
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// portable_binary_iarchive.cpp
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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 <istream>
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#include <string>
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#include <boost/predef/other/endian.h>
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#include <boost/serialization/throw_exception.hpp>
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#include <boost/archive/archive_exception.hpp>
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namespace boost { namespace archive {
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inline void
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portable_binary_iarchive::load_impl(boost::intmax_t & l, char maxsize){
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signed char size;
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l = 0;
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this->primitive_base_t::load(size);
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if(0 == size){
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return;
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}
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bool negative = (size < 0);
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if(negative)
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size = -size;
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if(size > maxsize)
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boost::serialization::throw_exception(
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portable_binary_iarchive_exception()
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);
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char * cptr = reinterpret_cast<char *>(& l);
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#if BOOST_ENDIAN_BIG_BYTE
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cptr += (sizeof(boost::intmax_t) - size);
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#endif
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this->primitive_base_t::load_binary(cptr, size);
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#if BOOST_ENDIAN_BIG_BYTE
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if((m_flags & endian_little) || (!(m_flags & endian_big)))
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#else
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if(m_flags & endian_big)
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#endif
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reverse_bytes(size, cptr);
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if(negative)
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l = -l;
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}
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#if BOOST_VERSION > 105800
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inline void
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portable_binary_iarchive::load_override(
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boost::archive::class_name_type & t
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){
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std::string cn;
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cn.reserve(BOOST_SERIALIZATION_MAX_KEY_SIZE);
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load_override(cn);
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if(cn.size() > (BOOST_SERIALIZATION_MAX_KEY_SIZE - 1))
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boost::serialization::throw_exception(
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boost::archive::archive_exception(
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boost::archive::archive_exception::invalid_class_name)
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);
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std::memcpy(t, cn.data(), cn.size());
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// borland tweak
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t.t[cn.size()] = '\0';
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}
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#else
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inline void
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portable_binary_iarchive::load_override(
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boost::archive::class_name_type & t, int
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){
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std::string cn;
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cn.reserve(BOOST_SERIALIZATION_MAX_KEY_SIZE);
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load_override(cn, 0);
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if(cn.size() > (BOOST_SERIALIZATION_MAX_KEY_SIZE - 1))
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boost::serialization::throw_exception(
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boost::archive::archive_exception(
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boost::archive::archive_exception::invalid_class_name)
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);
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std::memcpy(t, cn.data(), cn.size());
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// borland tweak
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t.t[cn.size()] = '\0';
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}
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#endif
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inline void
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portable_binary_iarchive::init(unsigned int flags){
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if(0 == (flags & boost::archive::no_header)){
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// read signature in an archive version independent manner
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std::string file_signature;
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* this >> file_signature;
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if(file_signature != boost::archive::BOOST_ARCHIVE_SIGNATURE())
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boost::serialization::throw_exception(
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boost::archive::archive_exception(
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boost::archive::archive_exception::invalid_signature
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)
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);
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// make sure the version of the reading archive library can
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// support the format of the archive being read
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boost::archive::library_version_type input_library_version;
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* this >> input_library_version;
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// ignore archive version checking
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/*
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// extra little .t is to get around borland quirk
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if(boost::archive::BOOST_ARCHIVE_VERSION() < input_library_version)
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boost::serialization::throw_exception(
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boost::archive::archive_exception(
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boost::archive::archive_exception::unsupported_version
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)
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);
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*/
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#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205))
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this->set_library_version(input_library_version);
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//#else
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//#if ! BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
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//detail::
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//#endif
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boost::archive::detail::basic_iarchive::set_library_version(
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input_library_version
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);
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#endif
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}
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if (!(m_flags & (endian_little | endian_big)))
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m_flags |= endian_little;
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unsigned char x;
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load(x);
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m_flags = x << 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_iarchive>;
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}
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// template class basic_binary_iprimitive<
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// portable_binary_iarchive,
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// std::istream::char_type,
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// std::istream::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_IARCHIVE_HPP
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