625 lines
21 KiB
Plaintext
625 lines
21 KiB
Plaintext
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#ifndef BOOST_ARCHIVE_DETAIL_ISERIALIZER_HPP
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#define BOOST_ARCHIVE_DETAIL_ISERIALIZER_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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#pragma inline_depth(511)
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#pragma inline_recursion(on)
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#endif
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#if defined(__MWERKS__)
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#pragma inline_depth(511)
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#endif
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// iserializer.hpp: interface for serialization system.
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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 <new> // for placement new
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#include <cstddef> // size_t, NULL
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#include <boost/config.hpp>
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#include <boost/detail/workaround.hpp>
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#if defined(BOOST_NO_STDC_NAMESPACE)
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namespace std{
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using ::size_t;
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} // namespace std
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#endif
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#include <boost/static_assert.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/identity.hpp>
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#include <boost/mpl/greater_equal.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/core/no_exceptions_support.hpp>
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#ifndef BOOST_SERIALIZATION_DEFAULT_TYPE_INFO
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#include <boost/serialization/extended_type_info_typeid.hpp>
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#endif
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#include <boost/serialization/throw_exception.hpp>
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#include <boost/serialization/smart_cast.hpp>
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#include <boost/serialization/static_warning.hpp>
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#include <boost/type_traits/is_pointer.hpp>
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#include <boost/type_traits/is_enum.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/type_traits/remove_const.hpp>
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#include <boost/type_traits/remove_extent.hpp>
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#include <boost/type_traits/is_polymorphic.hpp>
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#include <boost/serialization/assume_abstract.hpp>
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#ifndef BOOST_MSVC
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#define DONT_USE_HAS_NEW_OPERATOR ( \
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BOOST_WORKAROUND(__IBMCPP__, < 1210) \
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|| defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x590) \
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)
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#else
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#define DONT_USE_HAS_NEW_OPERATOR 0
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#endif
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#if ! DONT_USE_HAS_NEW_OPERATOR
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#include <boost/type_traits/has_new_operator.hpp>
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#endif
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#include <boost/serialization/serialization.hpp>
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#include <boost/serialization/version.hpp>
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#include <boost/serialization/level.hpp>
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#include <boost/serialization/tracking.hpp>
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#include <boost/serialization/type_info_implementation.hpp>
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#include <boost/serialization/nvp.hpp>
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#include <boost/serialization/void_cast.hpp>
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#include <boost/serialization/array.hpp>
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#include <boost/serialization/collection_size_type.hpp>
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#include <boost/serialization/singleton.hpp>
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#include <boost/serialization/wrapper.hpp>
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// the following is need only for dynamic cast of polymorphic pointers
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#include <boost/archive/archive_exception.hpp>
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#include <boost/archive/detail/basic_iarchive.hpp>
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#include <boost/archive/detail/basic_iserializer.hpp>
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#include <boost/archive/detail/basic_pointer_iserializer.hpp>
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#include <boost/archive/detail/archive_serializer_map.hpp>
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#include <boost/archive/detail/check.hpp>
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namespace boost {
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namespace serialization {
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class extended_type_info;
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} // namespace serialization
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namespace archive {
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// an accessor to permit friend access to archives. Needed because
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// some compilers don't handle friend templates completely
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class load_access {
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public:
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template<class Archive, class T>
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static void load_primitive(Archive &ar, T &t){
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ar.load(t);
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}
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};
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namespace detail {
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#ifdef BOOST_MSVC
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# pragma warning(push)
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# pragma warning(disable : 4511 4512)
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#endif
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template<class Archive, class T>
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class iserializer : public basic_iserializer
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{
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private:
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virtual void destroy(/*const*/ void *address) const {
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boost::serialization::access::destroy(static_cast<T *>(address));
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}
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protected:
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// protected constructor since it's always created by singleton
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explicit iserializer() :
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basic_iserializer(
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boost::serialization::singleton<
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typename
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boost::serialization::type_info_implementation< T >::type
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>::get_const_instance()
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)
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{}
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public:
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virtual BOOST_DLLEXPORT void load_object_data(
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basic_iarchive & ar,
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void *x,
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const unsigned int file_version
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) const BOOST_USED;
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virtual bool class_info() const {
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return boost::serialization::implementation_level< T >::value
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>= boost::serialization::object_class_info;
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}
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virtual bool tracking(const unsigned int /* flags */) const {
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return boost::serialization::tracking_level< T >::value
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== boost::serialization::track_always
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|| ( boost::serialization::tracking_level< T >::value
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== boost::serialization::track_selectively
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&& serialized_as_pointer());
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}
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virtual version_type version() const {
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return version_type(::boost::serialization::version< T >::value);
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}
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virtual bool is_polymorphic() const {
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return boost::is_polymorphic< T >::value;
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}
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virtual ~iserializer(){};
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};
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#ifdef BOOST_MSVC
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# pragma warning(pop)
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#endif
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template<class Archive, class T>
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BOOST_DLLEXPORT void iserializer<Archive, T>::load_object_data(
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basic_iarchive & ar,
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void *x,
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const unsigned int file_version
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) const {
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// note: we now comment this out. Before we permited archive
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// version # to be very large. Now we don't. To permit
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// readers of these old archives, we have to suppress this
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// code. Perhaps in the future we might re-enable it but
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// permit its suppression with a runtime switch.
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#if 0
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// trap case where the program cannot handle the current version
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if(file_version > static_cast<const unsigned int>(version()))
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boost::serialization::throw_exception(
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archive::archive_exception(
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boost::archive::archive_exception::unsupported_class_version,
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get_debug_info()
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)
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);
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#endif
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// make sure call is routed through the higest interface that might
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// be specialized by the user.
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boost::serialization::serialize_adl(
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boost::serialization::smart_cast_reference<Archive &>(ar),
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* static_cast<T *>(x),
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file_version
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);
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}
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#ifdef BOOST_MSVC
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# pragma warning(push)
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# pragma warning(disable : 4511 4512)
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#endif
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// the purpose of this code is to allocate memory for an object
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// without requiring the constructor to be called. Presumably
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// the allocated object will be subsequently initialized with
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// "placement new".
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// note: we have the boost type trait has_new_operator but we
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// have no corresponding has_delete_operator. So we presume
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// that the former being true would imply that the a delete
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// operator is also defined for the class T.
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template<class T>
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struct heap_allocation {
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// boost::has_new_operator< T > doesn't work on these compilers
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#if DONT_USE_HAS_NEW_OPERATOR
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// This doesn't handle operator new overload for class T
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static T * invoke_new(){
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return static_cast<T *>(operator new(sizeof(T)));
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}
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static void invoke_delete(T *t){
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(operator delete(t));
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}
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#else
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// note: we presume that a true value for has_new_operator
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// implies the existence of a class specific delete operator as well
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// as a class specific new operator.
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struct has_new_operator {
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static T * invoke_new() {
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return static_cast<T *>((T::operator new)(sizeof(T)));
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}
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static void invoke_delete(T * t) {
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// if compilation fails here, the likely cause that the class
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// T has a class specific new operator but no class specific
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// delete operator which matches the following signature.
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// note that this solution addresses the issue that two
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// possible signatures. But it doesn't address the possibility
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// that the class might have class specific new with NO
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// class specific delete at all. Patches (compatible with
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// C++03) welcome!
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delete t;
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}
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};
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struct doesnt_have_new_operator {
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static T* invoke_new() {
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return static_cast<T *>(operator new(sizeof(T)));
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}
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static void invoke_delete(T * t) {
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// Note: I'm reliance upon automatic conversion from T * to void * here
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delete t;
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}
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};
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static T * invoke_new() {
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typedef typename
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mpl::eval_if<
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boost::has_new_operator< T >,
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mpl::identity<has_new_operator >,
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mpl::identity<doesnt_have_new_operator >
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>::type typex;
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return typex::invoke_new();
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}
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static void invoke_delete(T *t) {
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typedef typename
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mpl::eval_if<
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boost::has_new_operator< T >,
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mpl::identity<has_new_operator >,
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mpl::identity<doesnt_have_new_operator >
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>::type typex;
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typex::invoke_delete(t);
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}
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#endif
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explicit heap_allocation(){
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m_p = invoke_new();
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}
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~heap_allocation(){
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if (0 != m_p)
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invoke_delete(m_p);
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}
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T* get() const {
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return m_p;
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}
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T* release() {
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T* p = m_p;
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m_p = 0;
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return p;
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}
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private:
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T* m_p;
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};
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template<class Archive, class T>
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class pointer_iserializer :
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public basic_pointer_iserializer
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{
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private:
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virtual void * heap_allocation() const {
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detail::heap_allocation<T> h;
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T * t = h.get();
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h.release();
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return t;
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}
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virtual const basic_iserializer & get_basic_serializer() const {
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return boost::serialization::singleton<
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iserializer<Archive, T>
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>::get_const_instance();
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}
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BOOST_DLLEXPORT virtual void load_object_ptr(
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basic_iarchive & ar,
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void * x,
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const unsigned int file_version
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) const BOOST_USED;
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protected:
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// this should alway be a singleton so make the constructor protected
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pointer_iserializer();
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~pointer_iserializer();
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};
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#ifdef BOOST_MSVC
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# pragma warning(pop)
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#endif
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// note: BOOST_DLLEXPORT is so that code for polymorphic class
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// serialized only through base class won't get optimized out
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template<class Archive, class T>
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BOOST_DLLEXPORT void pointer_iserializer<Archive, T>::load_object_ptr(
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basic_iarchive & ar,
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void * t,
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const unsigned int file_version
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) const
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{
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Archive & ar_impl =
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boost::serialization::smart_cast_reference<Archive &>(ar);
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// note that the above will throw std::bad_alloc if the allocation
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// fails so we don't have to address this contingency here.
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// catch exception during load_construct_data so that we don't
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// automatically delete the t which is most likely not fully
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// constructed
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BOOST_TRY {
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// this addresses an obscure situation that occurs when
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// load_constructor de-serializes something through a pointer.
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ar.next_object_pointer(t);
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boost::serialization::load_construct_data_adl<Archive, T>(
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ar_impl,
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static_cast<T *>(t),
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file_version
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);
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}
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BOOST_CATCH(...){
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// if we get here the load_construct failed. The heap_allocation
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// will be automatically deleted so we don't have to do anything
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// special here.
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BOOST_RETHROW;
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}
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BOOST_CATCH_END
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ar_impl >> boost::serialization::make_nvp(NULL, * static_cast<T *>(t));
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}
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template<class Archive, class T>
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pointer_iserializer<Archive, T>::pointer_iserializer() :
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basic_pointer_iserializer(
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boost::serialization::singleton<
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typename
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boost::serialization::type_info_implementation< T >::type
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>::get_const_instance()
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)
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{
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boost::serialization::singleton<
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iserializer<Archive, T>
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>::get_mutable_instance().set_bpis(this);
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archive_serializer_map<Archive>::insert(this);
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}
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template<class Archive, class T>
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pointer_iserializer<Archive, T>::~pointer_iserializer(){
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archive_serializer_map<Archive>::erase(this);
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}
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template<class Archive>
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struct load_non_pointer_type {
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// note this bounces the call right back to the archive
|
||
|
|
// with no runtime overhead
|
||
|
|
struct load_primitive {
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive & ar, T & t){
|
||
|
|
load_access::load_primitive(ar, t);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
// note this bounces the call right back to the archive
|
||
|
|
// with no runtime overhead
|
||
|
|
struct load_only {
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive & ar, const T & t){
|
||
|
|
// short cut to user's serializer
|
||
|
|
// make sure call is routed through the higest interface that might
|
||
|
|
// be specialized by the user.
|
||
|
|
boost::serialization::serialize_adl(
|
||
|
|
ar,
|
||
|
|
const_cast<T &>(t),
|
||
|
|
boost::serialization::version< T >::value
|
||
|
|
);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// note this save class information including version
|
||
|
|
// and serialization level to the archive
|
||
|
|
struct load_standard {
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive &ar, const T & t){
|
||
|
|
void * x = & const_cast<T &>(t);
|
||
|
|
ar.load_object(
|
||
|
|
x,
|
||
|
|
boost::serialization::singleton<
|
||
|
|
iserializer<Archive, T>
|
||
|
|
>::get_const_instance()
|
||
|
|
);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct load_conditional {
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive &ar, T &t){
|
||
|
|
//if(0 == (ar.get_flags() & no_tracking))
|
||
|
|
load_standard::invoke(ar, t);
|
||
|
|
//else
|
||
|
|
// load_only::invoke(ar, t);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive & ar, T &t){
|
||
|
|
typedef typename mpl::eval_if<
|
||
|
|
// if its primitive
|
||
|
|
mpl::equal_to<
|
||
|
|
boost::serialization::implementation_level< T >,
|
||
|
|
mpl::int_<boost::serialization::primitive_type>
|
||
|
|
>,
|
||
|
|
mpl::identity<load_primitive>,
|
||
|
|
// else
|
||
|
|
typename mpl::eval_if<
|
||
|
|
// class info / version
|
||
|
|
mpl::greater_equal<
|
||
|
|
boost::serialization::implementation_level< T >,
|
||
|
|
mpl::int_<boost::serialization::object_class_info>
|
||
|
|
>,
|
||
|
|
// do standard load
|
||
|
|
mpl::identity<load_standard>,
|
||
|
|
// else
|
||
|
|
typename mpl::eval_if<
|
||
|
|
// no tracking
|
||
|
|
mpl::equal_to<
|
||
|
|
boost::serialization::tracking_level< T >,
|
||
|
|
mpl::int_<boost::serialization::track_never>
|
||
|
|
>,
|
||
|
|
// do a fast load
|
||
|
|
mpl::identity<load_only>,
|
||
|
|
// else
|
||
|
|
// do a fast load only tracking is turned off
|
||
|
|
mpl::identity<load_conditional>
|
||
|
|
> > >::type typex;
|
||
|
|
check_object_versioning< T >();
|
||
|
|
check_object_level< T >();
|
||
|
|
typex::invoke(ar, t);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class Archive>
|
||
|
|
struct load_pointer_type {
|
||
|
|
struct abstract
|
||
|
|
{
|
||
|
|
template<class T>
|
||
|
|
static const basic_pointer_iserializer * register_type(Archive & /* ar */){
|
||
|
|
// it has? to be polymorphic
|
||
|
|
BOOST_STATIC_ASSERT(boost::is_polymorphic< T >::value);
|
||
|
|
return static_cast<basic_pointer_iserializer *>(NULL);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct non_abstract
|
||
|
|
{
|
||
|
|
template<class T>
|
||
|
|
static const basic_pointer_iserializer * register_type(Archive & ar){
|
||
|
|
return ar.register_type(static_cast<T *>(NULL));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
static const basic_pointer_iserializer * register_type(Archive &ar, const T & /*t*/){
|
||
|
|
// there should never be any need to load an abstract polymorphic
|
||
|
|
// class pointer. Inhibiting code generation for this
|
||
|
|
// permits abstract base classes to be used - note: exception
|
||
|
|
// virtual serialize functions used for plug-ins
|
||
|
|
typedef typename
|
||
|
|
mpl::eval_if<
|
||
|
|
boost::serialization::is_abstract<const T>,
|
||
|
|
boost::mpl::identity<abstract>,
|
||
|
|
boost::mpl::identity<non_abstract>
|
||
|
|
>::type typex;
|
||
|
|
return typex::template register_type< T >(ar);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
static T * pointer_tweak(
|
||
|
|
const boost::serialization::extended_type_info & eti,
|
||
|
|
void const * const t,
|
||
|
|
const T &
|
||
|
|
) {
|
||
|
|
// tweak the pointer back to the base class
|
||
|
|
void * upcast = const_cast<void *>(
|
||
|
|
boost::serialization::void_upcast(
|
||
|
|
eti,
|
||
|
|
boost::serialization::singleton<
|
||
|
|
typename
|
||
|
|
boost::serialization::type_info_implementation< T >::type
|
||
|
|
>::get_const_instance(),
|
||
|
|
t
|
||
|
|
)
|
||
|
|
);
|
||
|
|
if(NULL == upcast)
|
||
|
|
boost::serialization::throw_exception(
|
||
|
|
archive_exception(archive_exception::unregistered_class)
|
||
|
|
);
|
||
|
|
return static_cast<T *>(upcast);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
static void check_load(T & /* t */){
|
||
|
|
check_pointer_level< T >();
|
||
|
|
check_pointer_tracking< T >();
|
||
|
|
}
|
||
|
|
|
||
|
|
static const basic_pointer_iserializer *
|
||
|
|
find(const boost::serialization::extended_type_info & type){
|
||
|
|
return static_cast<const basic_pointer_iserializer *>(
|
||
|
|
archive_serializer_map<Archive>::find(type)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class Tptr>
|
||
|
|
static void invoke(Archive & ar, Tptr & t){
|
||
|
|
check_load(*t);
|
||
|
|
const basic_pointer_iserializer * bpis_ptr = register_type(ar, *t);
|
||
|
|
const basic_pointer_iserializer * newbpis_ptr = ar.load_pointer(
|
||
|
|
// note major hack here !!!
|
||
|
|
// I tried every way to convert Tptr &t (where Tptr might
|
||
|
|
// include const) to void * &. This is the only way
|
||
|
|
// I could make it work. RR
|
||
|
|
(void * & )t,
|
||
|
|
bpis_ptr,
|
||
|
|
find
|
||
|
|
);
|
||
|
|
// if the pointer isn't that of the base class
|
||
|
|
if(newbpis_ptr != bpis_ptr){
|
||
|
|
t = pointer_tweak(newbpis_ptr->get_eti(), t, *t);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class Archive>
|
||
|
|
struct load_enum_type {
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive &ar, T &t){
|
||
|
|
// convert integers to correct enum to load
|
||
|
|
int i;
|
||
|
|
ar >> boost::serialization::make_nvp(NULL, i);
|
||
|
|
t = static_cast< T >(i);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class Archive>
|
||
|
|
struct load_array_type {
|
||
|
|
template<class T>
|
||
|
|
static void invoke(Archive &ar, T &t){
|
||
|
|
typedef typename remove_extent< T >::type value_type;
|
||
|
|
|
||
|
|
// convert integers to correct enum to load
|
||
|
|
// determine number of elements in the array. Consider the
|
||
|
|
// fact that some machines will align elements on boundries
|
||
|
|
// other than characters.
|
||
|
|
std::size_t current_count = sizeof(t) / (
|
||
|
|
static_cast<char *>(static_cast<void *>(&t[1]))
|
||
|
|
- static_cast<char *>(static_cast<void *>(&t[0]))
|
||
|
|
);
|
||
|
|
boost::serialization::collection_size_type count;
|
||
|
|
ar >> BOOST_SERIALIZATION_NVP(count);
|
||
|
|
if(static_cast<std::size_t>(count) > current_count)
|
||
|
|
boost::serialization::throw_exception(
|
||
|
|
archive::archive_exception(
|
||
|
|
boost::archive::archive_exception::array_size_too_short
|
||
|
|
)
|
||
|
|
);
|
||
|
|
ar >> serialization::make_array(static_cast<value_type*>(&t[0]),count);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
} // detail
|
||
|
|
|
||
|
|
template<class Archive, class T>
|
||
|
|
inline void load(Archive & ar, T &t){
|
||
|
|
// if this assertion trips. It means we're trying to load a
|
||
|
|
// const object with a compiler that doesn't have correct
|
||
|
|
// funtion template ordering. On other compilers, this is
|
||
|
|
// handled below.
|
||
|
|
detail::check_const_loading< T >();
|
||
|
|
typedef
|
||
|
|
typename mpl::eval_if<is_pointer< T >,
|
||
|
|
mpl::identity<detail::load_pointer_type<Archive> >
|
||
|
|
,//else
|
||
|
|
typename mpl::eval_if<is_array< T >,
|
||
|
|
mpl::identity<detail::load_array_type<Archive> >
|
||
|
|
,//else
|
||
|
|
typename mpl::eval_if<is_enum< T >,
|
||
|
|
mpl::identity<detail::load_enum_type<Archive> >
|
||
|
|
,//else
|
||
|
|
mpl::identity<detail::load_non_pointer_type<Archive> >
|
||
|
|
>
|
||
|
|
>
|
||
|
|
>::type typex;
|
||
|
|
typex::invoke(ar, t);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace archive
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif // BOOST_ARCHIVE_DETAIL_ISERIALIZER_HPP
|