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#ifndef PORTABLE_BINARY_IARCHIVE_HPP
#define PORTABLE_BINARY_IARCHIVE_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// portable_binary_iarchive.hpp
// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org for updates, documentation, and revision history.
#include <ostream>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/detail/endian.hpp>
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// exception to be thrown if integer read from archive doesn't fit
// variable being loaded
class portable_binary_archive_exception :
public virtual boost::archive::archive_exception
{
public:
typedef enum {
incompatible_integer_size
} exception_code;
portable_binary_archive_exception(exception_code c = incompatible_integer_size )
{}
virtual const char *what( ) const throw( )
{
const char *msg = "programmer error";
switch(code){
case incompatible_integer_size:
msg = "integer cannot be represented";
default:
boost::archive::archive_exception::what();
}
return msg;
}
};
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// "Portable" input binary archive. This is a variation of the native binary
// archive. it addresses integer size and endienness so that binary archives can
// be passed across systems. Note:floating point types not addressed here
class portable_binary_iarchive :
// don't derive from binary_oarchive !!!
public boost::archive::binary_iarchive_impl<portable_binary_iarchive>
{
typedef portable_binary_iarchive derived_t;
#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
public:
#else
friend class boost::archive::basic_binary_iarchive<derived_t>;
friend class boost::archive::basic_binary_iprimitive<derived_t, std::istream>;
friend class boost::archive::load_access;
#endif
void load_impl(long & l, char maxsize){
char size;
size = is.get();
if(size > maxsize)
throw portable_binary_archive_exception() ;
l = 0;
load_binary(& l, size);
// we choose to use litle endian
#ifdef BOOST_BIG_ENDIAN
char * first = static_cast<char *>(static_cast<void *>(& l));
char * last = first + sizeof(l) - 1;
for(;first < last;++first, --last){
char x = *last;
*last = *first;
*first = x;
}
#endif
}
// default fall through for any types not specified here
template<class T>
void load(T & t){
boost::archive::binary_iarchive_impl<derived_t>::load(t);
}
void load(unsigned int & t){
long l;
load_impl(l, sizeof(unsigned int));
t = l;
}
void load(int & t){
long l;
load_impl(l, sizeof(int));
t = l;
}
void load(unsigned long & t){
long l;
load_impl(l, sizeof(unsigned long));
t = l;
}
void load(long & t){
long l;
load_impl(l, sizeof(long));
t = l;
}
public:
portable_binary_iarchive(std::istream & is, unsigned flags = 0) :
boost::archive::binary_iarchive_impl<derived_t>(
is,
flags | boost::archive::no_header // skip default header checking
)
{
// use our own header checking
if(0 != (flags & boost::archive::no_header)){
this->boost::archive::basic_binary_iarchive<derived_t>::init();
// skip the following for "portable" binary archives
// boost::archive::basic_binary_oprimitive<derived_t, std::ostream>::init();
}
}
};
// explicitly instantiate for this type of text stream
#include <boost/archive/impl/basic_binary_iarchive.ipp>
#include <boost/archive/impl/archive_pointer_iserializer.ipp>
#include <boost/archive/impl/basic_binary_iprimitive.ipp>
namespace boost {
namespace archive {
template class basic_binary_iarchive<portable_binary_iarchive> ;
template class basic_binary_iprimitive<portable_binary_iarchive, std::istream> ;
template class binary_iarchive_impl<portable_binary_iarchive> ;
template class detail::archive_pointer_iserializer<portable_binary_iarchive> ;
} // namespace archive
} // namespace boost
#define BOOST_ARCHIVE_CUSTOM_IARCHIVE_TYPES portable_binary_iarchive
#endif // PORTABLE_BINARY_IARCHIVE_HPP
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