ceph/src/boost/libs/serialization/include/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/assert.hpp>
  20
  21 #include <boost/serialization/throw_exception.hpp>
  22
  23 #include <boost/archive/iterators/unescape.hpp>
  24 #include <boost/archive/iterators/dataflow_exception.hpp>
  25
  26 namespace boost {
  27 namespace archive {
  28 namespace iterators {
  29
  30 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  31 // replace &??? xml escape sequences with the corresponding characters
  32 template<class Base>
  33 class xml_unescape
  34     : public unescape<xml_unescape<Base>, Base>
  35 {
  36     friend class boost::iterator_core_access;
  37     typedef xml_unescape<Base> this_t;
  38     typedef unescape<this_t, Base> super_t;
  39     typedef typename boost::iterator_reference<this_t> reference_type;
  40
  41     reference_type dereference() const {
  42         return unescape<xml_unescape<Base>, Base>::dereference();
  43     }
  44 public:
  45     // workaround msvc 7.1 ICU crash
  46     #if defined(BOOST_MSVC)
  47         typedef int value_type;
  48     #else
  49         typedef typename this_t::value_type value_type;
  50     #endif
  51
  52     void drain_residue(const char *literal);
  53     value_type drain();
  54
  55     template<class T>
  56     xml_unescape(T start) :
  57         super_t(Base(static_cast< T >(start)))
  58     {}
  59     // intel 7.1 doesn't like default copy constructor
  60     xml_unescape(const xml_unescape & rhs) :
  61         super_t(rhs.base_reference())
  62     {}
  63 };
  64
  65 template<class Base>
  66 void xml_unescape<Base>::drain_residue(const char * literal){
  67     do{
  68         if(* literal != * ++(this->base_reference()))
  69             boost::serialization::throw_exception(
  70                 dataflow_exception(
  71                     dataflow_exception::invalid_xml_escape_sequence
  72                 )
  73             );
  74     }
  75     while('\0' != * ++literal);
  76 }
  77
  78 // note key constraint on this function is that can't "look ahead" any
  79 // more than necessary into base iterator.  Doing so would alter the base
  80 // iterator refenence which would make subsequent iterator comparisons
  81 // incorrect and thereby break the composiblity of iterators.
  82 template<class Base>
  83 typename xml_unescape<Base>::value_type
  84 //int
  85 xml_unescape<Base>::drain(){
  86     value_type retval = * this->base_reference();
  87     if('&' != retval){
  88         return retval;
  89     }
  90     retval = * ++(this->base_reference());
  91     switch(retval){
  92     case 'l': // &lt;
  93         drain_residue("t;");
  94         retval = '<';
  95         break;
  96     case 'g': // &gt;
  97         drain_residue("t;");
  98         retval = '>';
  99         break;
 100     case 'a':
 101         retval = * ++(this->base_reference());
 102         switch(retval){
 103         case 'p': // &apos;
 104             drain_residue("os;");
 105             retval = '\'';
 106             break;
 107         case 'm': // &amp;
 108             drain_residue("p;");
 109             retval = '&';
 110             break;
 111         }
 112         break;
 113     case 'q':
 114         drain_residue("uot;");
 115         retval = '"';
 116         break;
 117     }
 118     return retval;
 119 }
 120
 121 } // namespace iterators
 122 } // namespace archive
 123 } // namespace boost
 124
 125 #endif // BOOST_ARCHIVE_ITERATORS_XML_UNESCAPE_HPP