#ifndef BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP | |
#define BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_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 | |
// xml_unescape.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 <boost/assert.hpp> | |
#include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME | |
#include <boost/serialization/throw_exception.hpp> | |
#include <boost/serialization/pfto.hpp> | |
#include <boost/archive/iterators/unescape.hpp> | |
#include <boost/archive/iterators/dataflow_exception.hpp> | |
namespace boost { | |
namespace archive { | |
namespace iterators { | |
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 | |
// replace &??? xml escape sequences with the corresponding characters | |
template<class Base> | |
class xml_unescape | |
: public unescape<xml_unescape<Base>, Base> | |
{ | |
friend class boost::iterator_core_access; | |
typedef xml_unescape<Base> this_t; | |
typedef unescape<this_t, Base> super_t; | |
typedef BOOST_DEDUCED_TYPENAME boost::iterator_reference<this_t> reference_type; | |
reference_type dereference() const { | |
return unescape<xml_unescape<Base>, Base>::dereference(); | |
} | |
public: | |
// workaround msvc 7.1 ICU crash | |
#if defined(BOOST_MSVC) | |
typedef int value_type; | |
#else | |
typedef BOOST_DEDUCED_TYPENAME this_t::value_type value_type; | |
#endif | |
void drain_residue(const char *literal); | |
value_type drain(); | |
template<class T> | |
xml_unescape(BOOST_PFTO_WRAPPER(T) start) : | |
super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start)))) | |
{} | |
// intel 7.1 doesn't like default copy constructor | |
xml_unescape(const xml_unescape & rhs) : | |
super_t(rhs.base_reference()) | |
{} | |
}; | |
template<class Base> | |
void xml_unescape<Base>::drain_residue(const char * literal){ | |
do{ | |
if(* literal != * ++(this->base_reference())) | |
boost::serialization::throw_exception( | |
dataflow_exception( | |
dataflow_exception::invalid_xml_escape_sequence | |
) | |
); | |
} | |
while('\0' != * ++literal); | |
} | |
// note key constraint on this function is that can't "look ahead" any | |
// more than necessary into base iterator. Doing so would alter the base | |
// iterator refenence which would make subsequent iterator comparisons | |
// incorrect and thereby break the composiblity of iterators. | |
template<class Base> | |
BOOST_DEDUCED_TYPENAME xml_unescape<Base>::value_type | |
//int | |
xml_unescape<Base>::drain(){ | |
value_type retval = * this->base_reference(); | |
if('&' != retval){ | |
return retval; | |
} | |
retval = * ++(this->base_reference()); | |
switch(retval){ | |
case 'l': // < | |
drain_residue("t;"); | |
retval = '<'; | |
break; | |
case 'g': // > | |
drain_residue("t;"); | |
retval = '>'; | |
break; | |
case 'a': | |
retval = * ++(this->base_reference()); | |
switch(retval){ | |
case 'p': // ' | |
drain_residue("os;"); | |
retval = '\''; | |
break; | |
case 'm': // & | |
drain_residue("p;"); | |
retval = '&'; | |
break; | |
} | |
break; | |
case 'q': | |
drain_residue("uot;"); | |
retval = '"'; | |
break; | |
} | |
return retval; | |
} | |
} // namespace iterators | |
} // namespace archive | |
} // namespace boost | |
#endif // BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP |