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#ifndef BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP
#define BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// escape.hpp
// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org for updates, documentation, and revision history.
#include <boost/assert.hpp>
#include <cstddef> // NULL
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/iterator/iterator_traits.hpp>
namespace boost {
namespace archive {
namespace iterators {
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// insert escapes into text
template<class Derived, class Base>
class escape :
public boost::iterator_adaptor<
Derived,
Base,
typename boost::iterator_value<Base>::type,
single_pass_traversal_tag,
typename boost::iterator_value<Base>::type
>
{
typedef typename boost::iterator_value<Base>::type base_value_type;
typedef typename boost::iterator_reference<Base>::type reference_type;
friend class boost::iterator_core_access;
typedef typename boost::iterator_adaptor<
Derived,
Base,
base_value_type,
single_pass_traversal_tag,
base_value_type
> super_t;
typedef escape<Derived, Base> this_t;
void dereference_impl() {
m_current_value = static_cast<Derived *>(this)->fill(m_bnext, m_bend);
m_full = true;
}
//Access the value referred to
reference_type dereference() const {
if(!m_full)
const_cast<this_t *>(this)->dereference_impl();
return m_current_value;
}
bool equal(const this_t & rhs) const {
if(m_full){
if(! rhs.m_full)
const_cast<this_t *>(& rhs)->dereference_impl();
}
else{
if(rhs.m_full)
const_cast<this_t *>(this)->dereference_impl();
}
if(m_bnext != rhs.m_bnext)
return false;
if(this->base_reference() != rhs.base_reference())
return false;
return true;
}
void increment(){
if(++m_bnext < m_bend){
m_current_value = *m_bnext;
return;
}
++(this->base_reference());
m_bnext = NULL;
m_bend = NULL;
m_full = false;
}
// buffer to handle pending characters
const base_value_type *m_bnext;
const base_value_type *m_bend;
bool m_full;
base_value_type m_current_value;
public:
escape(Base base) :
super_t(base),
m_bnext(NULL),
m_bend(NULL),
m_full(false),
m_current_value(0)
{
}
};
} // namespace iterators
} // namespace archive
} // namespace boost
#endif // BOOST_ARCHIVE_ITERATORS_ESCAPE_HPP
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