1 #ifndef BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP 2 #define BOOST_ARCHIVE_ITERATORS_ESCAPE_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 // escape.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 #include <cstddef> // NULL 21 22 #include <boost/iterator/iterator_adaptor.hpp> 23 #include <boost/iterator/iterator_traits.hpp> 24 25 namespace boost { 26 namespace archive { 27 namespace iterators { 28 29 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 30 // insert escapes into text 31 32 template<class Derived, class Base> 33 class escape : 34 public boost::iterator_adaptor< 35 Derived, 36 Base, 37 typename boost::iterator_value<Base>::type, 38 single_pass_traversal_tag, 39 typename boost::iterator_value<Base>::type 40 > 41 { 42 typedef typename boost::iterator_value<Base>::type base_value_type; 43 typedef typename boost::iterator_reference<Base>::type reference_type; 44 friend class boost::iterator_core_access; 45 46 typedef typename boost::iterator_adaptor< 47 Derived, 48 Base, 49 base_value_type, 50 single_pass_traversal_tag, 51 base_value_type 52 > super_t; 53 54 typedef escape<Derived, Base> this_t; 55 dereference_impl()56 void dereference_impl() { 57 m_current_value = static_cast<Derived *>(this)->fill(m_bnext, m_bend); 58 m_full = true; 59 } 60 61 //Access the value referred to dereference() const62 reference_type dereference() const { 63 if(!m_full) 64 const_cast<this_t *>(this)->dereference_impl(); 65 return m_current_value; 66 } 67 equal(const this_t & rhs) const68 bool equal(const this_t & rhs) const { 69 if(m_full){ 70 if(! rhs.m_full) 71 const_cast<this_t *>(& rhs)->dereference_impl(); 72 } 73 else{ 74 if(rhs.m_full) 75 const_cast<this_t *>(this)->dereference_impl(); 76 } 77 if(m_bnext != rhs.m_bnext) 78 return false; 79 if(this->base_reference() != rhs.base_reference()) 80 return false; 81 return true; 82 } 83 increment()84 void increment(){ 85 if(++m_bnext < m_bend){ 86 m_current_value = *m_bnext; 87 return; 88 } 89 ++(this->base_reference()); 90 m_bnext = NULL; 91 m_bend = NULL; 92 m_full = false; 93 } 94 95 // buffer to handle pending characters 96 const base_value_type *m_bnext; 97 const base_value_type *m_bend; 98 bool m_full; 99 base_value_type m_current_value; 100 public: escape(Base base)101 escape(Base base) : 102 super_t(base), 103 m_bnext(NULL), 104 m_bend(NULL), 105 m_full(false), 106 m_current_value(0) 107 { 108 } 109 }; 110 111 } // namespace iterators 112 } // namespace archive 113 } // namespace boost 114 115 #endif // BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP 116