ceph/src/boost/boost/archive/iterators/xml_unescape.hpp

   1 #ifndef BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
   2 #define BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // xml_unescape.hpp
  11
  12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 #include <boost/config.hpp>
  20 #include <boost/detail/workaround.hpp>
  21 #include <boost/assert.hpp>
  22
  23 #include <boost/serialization/throw_exception.hpp>
  24
  25 #include <boost/archive/iterators/unescape.hpp>
  26 #include <boost/archive/iterators/dataflow_exception.hpp>
  27
  28 namespace boost {
  29 namespace archive {
  30 namespace iterators {
  31
  32 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  33 // replace &??? xml escape sequences with the corresponding characters
  34 template<class Base>
  35 class xml_unescape
  36     : public unescape<xml_unescape<Base>, Base>
  37 {
  38     friend class boost::iterator_core_access;
  39     typedef xml_unescape<Base> this_t;
  40     typedef unescape<this_t, Base> super_t;
  41     typedef typename boost::iterator_reference<this_t> reference_type;
  42
  43     reference_type dereference() const {
  44         return unescape<xml_unescape<Base>, Base>::dereference();
  45     }
  46 public:
  47     // msvc versions prior to 14.0 crash with and ICE
  48     #if BOOST_WORKAROUND(BOOST_MSVC, < 1900)
  49         typedef int value_type;
  50     #else
  51         typedef typename super_t::value_type value_type;
  52     #endif
  53
  54     void drain_residue(const char *literal);
  55     value_type drain();
  56
  57     template<class T>
  58     xml_unescape(T start) :
  59         super_t(Base(static_cast< T >(start)))
  60     {}
  61     // intel 7.1 doesn't like default copy constructor
  62     xml_unescape(const xml_unescape & rhs) :
  63         super_t(rhs.base_reference())
  64     {}
  65 };
  66
  67 template<class Base>
  68 void xml_unescape<Base>::drain_residue(const char * literal){
  69     do{
  70         if(* literal != * ++(this->base_reference()))
  71             boost::serialization::throw_exception(
  72                 dataflow_exception(
  73                     dataflow_exception::invalid_xml_escape_sequence
  74                 )
  75             );
  76     }
  77     while('\0' != * ++literal);
  78 }
  79
  80 // note key constraint on this function is that can't "look ahead" any
  81 // more than necessary into base iterator.  Doing so would alter the base
  82 // iterator refenence which would make subsequent iterator comparisons
  83 // incorrect and thereby break the composiblity of iterators.
  84 template<class Base>
  85 typename xml_unescape<Base>::value_type
  86 //int
  87 xml_unescape<Base>::drain(){
  88     value_type retval = * this->base_reference();
  89     if('&' != retval){
  90         return retval;
  91     }
  92     retval = * ++(this->base_reference());
  93     switch(retval){
  94     case 'l': // &lt;
  95         drain_residue("t;");
  96         retval = '<';
  97         break;
  98     case 'g': // &gt;
  99         drain_residue("t;");
 100         retval = '>';
 101         break;
 102     case 'a':
 103         retval = * ++(this->base_reference());
 104         switch(retval){
 105         case 'p': // &apos;
 106             drain_residue("os;");
 107             retval = '\'';
 108             break;
 109         case 'm': // &amp;
 110             drain_residue("p;");
 111             retval = '&';
 112             break;
 113         }
 114         break;
 115     case 'q':
 116         drain_residue("uot;");
 117         retval = '"';
 118         break;
 119     }
 120     return retval;
 121 }
 122
 123 } // namespace iterators
 124 } // namespace archive
 125 } // namespace boost
 126
 127 #endif // BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP