Chris@16: #ifndef BOOST_ARCHIVE_ITERATORS_REMOVE_WHITESPACE_HPP
Chris@16: #define BOOST_ARCHIVE_ITERATORS_REMOVE_WHITESPACE_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: // remove_whitespace.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: 
Chris@16: #include <boost/serialization/pfto.hpp>
Chris@16: 
Chris@16: #include <boost/iterator/iterator_adaptor.hpp>
Chris@16: #include <boost/iterator/filter_iterator.hpp>
Chris@16: #include <boost/iterator/iterator_traits.hpp>
Chris@16: 
Chris@16: // here is the default standard implementation of the functor used
Chris@16: // by the filter iterator to remove spaces.  Unfortunately usage
Chris@16: // of this implementation in combination with spirit trips a bug
Chris@16: // VC 6.5.  The only way I can find to work around it is to 
Chris@16: // implement a special non-standard version for this platform
Chris@16: 
Chris@16: #ifndef BOOST_NO_CWCTYPE
Chris@16: #include <cwctype> // iswspace
Chris@16: #if defined(BOOST_NO_STDC_NAMESPACE)
Chris@16: namespace std{ using ::iswspace; }
Chris@16: #endif
Chris@16: #endif
Chris@16: 
Chris@16: #include <cctype> // isspace
Chris@16: #if defined(BOOST_NO_STDC_NAMESPACE)
Chris@16: namespace std{ using ::isspace; }
Chris@16: #endif
Chris@16: 
Chris@16: #if defined(__STD_RWCOMPILER_H__) || defined(_RWSTD_VER)
Chris@16: // this is required for the RW STL on Linux and Tru64.
Chris@16: #undef isspace
Chris@16: #undef iswspace
Chris@16: #endif
Chris@16: 
Chris@16: namespace { // anonymous
Chris@16: 
Chris@16: template<class CharType>
Chris@16: struct remove_whitespace_predicate;
Chris@16: 
Chris@16: template<>
Chris@16: struct remove_whitespace_predicate<char>
Chris@16: {
Chris@16:     bool operator()(unsigned char t){
Chris@16:         return ! std::isspace(t);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: #ifndef BOOST_NO_CWCHAR
Chris@16: template<>
Chris@16: struct remove_whitespace_predicate<wchar_t>
Chris@16: {
Chris@16:     bool operator()(wchar_t t){
Chris@16:         return ! std::iswspace(t);
Chris@16:     }
Chris@16: };
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace anonymous
Chris@16: 
Chris@16: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
Chris@16: // convert base64 file data (including whitespace and padding) to binary
Chris@16: 
Chris@16: namespace boost { 
Chris@16: namespace archive {
Chris@16: namespace iterators {
Chris@16: 
Chris@16: // custom version of filter iterator which doesn't look ahead further than
Chris@16: // necessary
Chris@16: 
Chris@16: template<class Predicate, class Base>
Chris@16: class filter_iterator
Chris@16:     : public boost::iterator_adaptor<
Chris@16:         filter_iterator<Predicate, Base>,
Chris@16:         Base,
Chris@16:         use_default,
Chris@16:         single_pass_traversal_tag
Chris@16:     >
Chris@16: {
Chris@16:     friend class boost::iterator_core_access;
Chris@101:     typedef typename boost::iterator_adaptor<
Chris@16:         filter_iterator<Predicate, Base>,
Chris@16:         Base,
Chris@16:         use_default,
Chris@16:         single_pass_traversal_tag
Chris@16:     > super_t;
Chris@16:     typedef filter_iterator<Predicate, Base> this_t;
Chris@101:     typedef typename super_t::reference reference_type;
Chris@16: 
Chris@16:     reference_type dereference_impl(){
Chris@16:         if(! m_full){
Chris@16:             while(! m_predicate(* this->base_reference()))
Chris@16:                 ++(this->base_reference());
Chris@16:             m_full = true;
Chris@16:         }
Chris@16:         return * this->base_reference();
Chris@16:     }
Chris@16: 
Chris@16:     reference_type dereference() const {
Chris@16:         return const_cast<this_t *>(this)->dereference_impl();
Chris@16:     }
Chris@16: 
Chris@16:     Predicate m_predicate;
Chris@16:     bool m_full;
Chris@16: public:
Chris@16:     // note: this function is public only because comeau compiler complained
Chris@16:     // I don't know if this is because the compiler is wrong or what
Chris@16:     void increment(){
Chris@16:         m_full = false;
Chris@16:         ++(this->base_reference());
Chris@16:     }
Chris@16:     filter_iterator(Base start) : 
Chris@16:         super_t(start), 
Chris@16:         m_full(false)
Chris@16:     {}
Chris@16:     filter_iterator(){}
Chris@16: };
Chris@16: 
Chris@16: template<class Base>
Chris@16: class remove_whitespace : 
Chris@16:     public filter_iterator<
Chris@16:         remove_whitespace_predicate<
Chris@101:             typename boost::iterator_value<Base>::type
Chris@101:             //typename Base::value_type
Chris@16:         >,
Chris@16:         Base
Chris@16:     >
Chris@16: {
Chris@16:     friend class boost::iterator_core_access;
Chris@16:     typedef filter_iterator<
Chris@16:         remove_whitespace_predicate<
Chris@101:             typename boost::iterator_value<Base>::type
Chris@101:             //typename Base::value_type
Chris@16:         >,
Chris@16:         Base
Chris@16:     > super_t;
Chris@16: public:
Chris@16: //    remove_whitespace(){} // why is this needed?
Chris@16:     // make composible buy using templated constructor
Chris@16:     template<class T>
Chris@16:     remove_whitespace(BOOST_PFTO_WRAPPER(T) start) :
Chris@16:         super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start))))
Chris@16:     {}
Chris@16:     // intel 7.1 doesn't like default copy constructor
Chris@16:     remove_whitespace(const remove_whitespace & rhs) : 
Chris@16:         super_t(rhs.base_reference())
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_REMOVE_WHITESPACE_HPP