[857] | 1 | #ifndef BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
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| 2 | #define BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
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| 3 |
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| 4 | // MS compatible compilers support #pragma once
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| 5 | #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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| 6 | # pragma once
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| 7 | #endif
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| 8 |
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| 9 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 10 | // xml_unescape.hpp
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| 11 |
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| 12 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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| 13 | // Use, modification and distribution is subject to the Boost Software
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| 14 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 15 | // http://www.boost.org/LICENSE_1_0.txt)
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| 16 |
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| 17 | // See http://www.boost.org for updates, documentation, and revision history.
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| 18 |
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| 19 | #include <cassert>
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| 20 |
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| 21 | #include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME
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| 22 | #include <boost/throw_exception.hpp>
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| 23 | #include <boost/pfto.hpp>
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| 24 |
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| 25 | #include <boost/archive/iterators/unescape.hpp>
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| 26 | #include <boost/archive/iterators/dataflow_exception.hpp>
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| 27 |
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| 28 | namespace boost {
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| 29 | namespace archive {
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| 30 | namespace iterators {
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| 31 |
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| 32 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 33 | // replace &??? xml escape sequences with the corresponding characters
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| 34 | template<class Base>
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| 35 | class xml_unescape
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| 36 | : public unescape<xml_unescape<Base>, Base>
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| 37 | {
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| 38 | friend class boost::iterator_core_access;
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| 39 | typedef xml_unescape<Base> this_t;
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| 40 | typedef unescape<this_t, Base> super_t;
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| 41 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_reference<this_t> reference_type;
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| 42 |
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| 43 | reference_type dereference() const {
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| 44 | return unescape<xml_unescape<Base>, Base>::dereference();
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| 45 | }
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| 46 | public:
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| 47 | void drain_residue(const char *literal);
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| 48 | int drain();
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| 49 |
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| 50 | template<class T>
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| 51 | xml_unescape(BOOST_PFTO_WRAPPER(T) start) :
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| 52 | super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast<T>(start))))
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| 53 | {}
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| 54 | // intel 7.1 doesn't like default copy constructor
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| 55 | xml_unescape(const xml_unescape & rhs) :
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| 56 | super_t(rhs.base_reference())
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| 57 | {}
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| 58 | };
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| 59 |
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| 60 | template<class Base>
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| 61 | void xml_unescape<Base>::drain_residue(const char * literal){
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| 62 | do{
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| 63 | if(* literal != * ++(this->base_reference()))
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| 64 | boost::throw_exception(
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| 65 | dataflow_exception(
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| 66 | dataflow_exception::invalid_xml_escape_sequence
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| 67 | )
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| 68 | );
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| 69 | }
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| 70 | while('\0' != * ++literal);
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| 71 | }
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| 72 |
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| 73 | // note key constraint on this function is that can't "look ahead" any
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| 74 | // more than necessary into base iterator. Doing so would alter the base
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| 75 | // iterator refenence which would make subsequent iterator comparisons
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| 76 | // incorrect and thereby break the composiblity of iterators.
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| 77 | template<class Base>
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| 78 | int xml_unescape<Base>::drain(){
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| 79 | int retval = * this->base_reference();
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| 80 | if('&' != retval){
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| 81 | return retval;
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| 82 | }
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| 83 | retval = * ++(this->base_reference());
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| 84 | switch(retval){
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| 85 | case 'l': // <
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| 86 | drain_residue("t;");
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| 87 | retval = '<';
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| 88 | break;
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| 89 | case 'g': // >
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| 90 | drain_residue("t;");
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| 91 | retval = '>';
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| 92 | break;
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| 93 | case 'a':
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| 94 | retval = * ++(this->base_reference());
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| 95 | switch(retval){
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| 96 | case 'p': // '
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| 97 | drain_residue("os;");
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| 98 | retval = '\'';
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| 99 | break;
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| 100 | case 'm': // &
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| 101 | drain_residue("p;");
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| 102 | retval = '&';
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| 103 | break;
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| 104 | }
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| 105 | break;
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| 106 | case 'q':
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| 107 | drain_residue("uot;");
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| 108 | retval = '"';
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| 109 | break;
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| 110 | }
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| 111 | return retval;
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| 112 | }
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| 113 |
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| 114 | } // namespace iterators
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| 115 | } // namespace archive
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| 116 | } // namespace boost
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| 117 |
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| 118 | #endif // BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
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