Chris@16: #ifndef BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP
Chris@16: #define BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP
Chris@16: 
Chris@16: // MS compatible compilers support #pragma once
Chris@101: #if defined(_MSC_VER)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
Chris@16: // escape.hpp
Chris@16: 
Chris@16: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
Chris@16: // Use, modification and distribution is subject to the Boost Software
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  See http://www.boost.org for updates, documentation, and revision history.
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <cstddef> // NULL
Chris@16: 
Chris@16: #include <boost/iterator/iterator_adaptor.hpp>
Chris@16: #include <boost/iterator/iterator_traits.hpp>
Chris@16: 
Chris@16: namespace boost { 
Chris@16: namespace archive {
Chris@16: namespace iterators {
Chris@16: 
Chris@16: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
Chris@16: // insert escapes into text
Chris@16: 
Chris@16: template<class Derived, class Base>
Chris@16: class escape : 
Chris@16:     public boost::iterator_adaptor<
Chris@16:         Derived, 
Chris@16:         Base, 
Chris@101:         typename boost::iterator_value<Base>::type,
Chris@16:         single_pass_traversal_tag,
Chris@101:         typename boost::iterator_value<Base>::type
Chris@16:     >
Chris@16: {
Chris@101:     typedef typename boost::iterator_value<Base>::type base_value_type;
Chris@101:     typedef typename boost::iterator_reference<Base>::type reference_type;
Chris@16:     friend class boost::iterator_core_access;
Chris@16: 
Chris@101:     typedef typename boost::iterator_adaptor<
Chris@16:         Derived, 
Chris@16:         Base, 
Chris@16:         base_value_type,
Chris@16:         single_pass_traversal_tag,
Chris@16:         base_value_type
Chris@16:     > super_t;
Chris@16: 
Chris@16:     typedef escape<Derived, Base> this_t;
Chris@16: 
Chris@16:     void dereference_impl() {
Chris@16:         m_current_value = static_cast<Derived *>(this)->fill(m_bnext, m_bend);
Chris@16:         m_full = true;
Chris@16:     }
Chris@16: 
Chris@16:     //Access the value referred to 
Chris@16:     reference_type dereference() const {
Chris@16:         if(!m_full)
Chris@16:             const_cast<this_t *>(this)->dereference_impl();
Chris@16:         return m_current_value;
Chris@16:     }
Chris@16: 
Chris@16:     bool equal(const this_t & rhs) const {
Chris@16:         if(m_full){
Chris@16:             if(! rhs.m_full)
Chris@16:                 const_cast<this_t *>(& rhs)->dereference_impl();
Chris@16:         }
Chris@16:         else{
Chris@16:             if(rhs.m_full)
Chris@16:                 const_cast<this_t *>(this)->dereference_impl();
Chris@16:         }
Chris@16:         if(m_bnext != rhs.m_bnext)
Chris@16:             return false;
Chris@16:         if(this->base_reference() != rhs.base_reference())
Chris@16:             return false;
Chris@16:         return true;
Chris@16:     }
Chris@16: 
Chris@16:    void increment(){
Chris@16:         if(++m_bnext < m_bend){
Chris@16:             m_current_value = *m_bnext;
Chris@16:             return;
Chris@16:         }
Chris@16:         ++(this->base_reference());
Chris@16:         m_bnext = NULL;
Chris@16:         m_bend = NULL;
Chris@16:         m_full = false;
Chris@16:     }
Chris@16: 
Chris@16:     // buffer to handle pending characters
Chris@16:     const base_value_type *m_bnext;
Chris@16:     const base_value_type *m_bend;
Chris@16:     bool m_full;
Chris@16:     base_value_type m_current_value;
Chris@16: public:
Chris@16:     escape(Base base) : 
Chris@16:         super_t(base),
Chris@16:         m_bnext(NULL),
Chris@16:         m_bend(NULL),
Chris@16:         m_full(false)
Chris@16:     {
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: } // namespace iterators
Chris@16: } // namespace archive
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP