129 lines
3.7 KiB
C++
129 lines
3.7 KiB
C++
#ifndef BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
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#define BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// xml_unescape.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 <boost/assert.hpp>
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#include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME
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#include <boost/serialization/throw_exception.hpp>
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#include <boost/serialization/pfto.hpp>
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#include <boost/archive/iterators/unescape.hpp>
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#include <boost/archive/iterators/dataflow_exception.hpp>
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namespace boost {
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namespace archive {
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namespace iterators {
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// replace &??? xml escape sequences with the corresponding characters
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template<class Base>
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class xml_unescape
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: public unescape<xml_unescape<Base>, Base>
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{
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friend class boost::iterator_core_access;
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typedef xml_unescape<Base> this_t;
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typedef unescape<this_t, Base> super_t;
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typedef BOOST_DEDUCED_TYPENAME boost::iterator_reference<this_t> reference_type;
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reference_type dereference() const {
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return unescape<xml_unescape<Base>, Base>::dereference();
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}
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public:
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// workaround msvc 7.1 ICU crash
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#if defined(BOOST_MSVC)
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typedef int value_type;
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#else
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typedef BOOST_DEDUCED_TYPENAME this_t::value_type value_type;
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#endif
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void drain_residue(const char *literal);
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value_type drain();
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template<class T>
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xml_unescape(BOOST_PFTO_WRAPPER(T) start) :
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super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start))))
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{}
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// intel 7.1 doesn't like default copy constructor
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xml_unescape(const xml_unescape & rhs) :
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super_t(rhs.base_reference())
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{}
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};
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template<class Base>
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void xml_unescape<Base>::drain_residue(const char * literal){
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do{
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if(* literal != * ++(this->base_reference()))
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boost::serialization::throw_exception(
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dataflow_exception(
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dataflow_exception::invalid_xml_escape_sequence
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)
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);
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}
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while('\0' != * ++literal);
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}
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// note key constraint on this function is that can't "look ahead" any
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// more than necessary into base iterator. Doing so would alter the base
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// iterator refenence which would make subsequent iterator comparisons
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// incorrect and thereby break the composiblity of iterators.
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template<class Base>
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BOOST_DEDUCED_TYPENAME xml_unescape<Base>::value_type
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//int
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xml_unescape<Base>::drain(){
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value_type retval = * this->base_reference();
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if('&' != retval){
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return retval;
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}
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retval = * ++(this->base_reference());
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switch(retval){
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case 'l': // <
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drain_residue("t;");
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retval = '<';
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break;
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case 'g': // >
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drain_residue("t;");
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retval = '>';
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break;
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case 'a':
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retval = * ++(this->base_reference());
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switch(retval){
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case 'p': // '
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drain_residue("os;");
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retval = '\'';
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break;
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case 'm': // &
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drain_residue("p;");
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retval = '&';
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break;
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}
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break;
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case 'q':
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drain_residue("uot;");
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retval = '"';
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break;
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}
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return retval;
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}
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} // namespace iterators
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} // namespace archive
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} // namespace boost
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#endif // BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
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