ceph/src/boost/libs/serialization/include/boost/archive/iterators/remove_whitespace.hpp

   1 #ifndef BOOST_ARCHIVE_ITERATORS_REMOVE_WHITESPACE_HPP
   2 #define BOOST_ARCHIVE_ITERATORS_REMOVE_WHITESPACE_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 // remove_whitespace.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/iterator/iterator_adaptor.hpp>
  22 #include <boost/iterator/filter_iterator.hpp>
  23 #include <boost/iterator/iterator_traits.hpp>
  24
  25 // here is the default standard implementation of the functor used
  26 // by the filter iterator to remove spaces.  Unfortunately usage
  27 // of this implementation in combination with spirit trips a bug
  28 // VC 6.5.  The only way I can find to work around it is to
  29 // implement a special non-standard version for this platform
  30
  31 #ifndef BOOST_NO_CWCTYPE
  32 #include <cwctype> // iswspace
  33 #if defined(BOOST_NO_STDC_NAMESPACE)
  34 namespace std{ using ::iswspace; }
  35 #endif
  36 #endif
  37
  38 #include <cctype> // isspace
  39 #if defined(BOOST_NO_STDC_NAMESPACE)
  40 namespace std{ using ::isspace; }
  41 #endif
  42
  43 #if defined(__STD_RWCOMPILER_H__) || defined(_RWSTD_VER)
  44 // this is required for the RW STL on Linux and Tru64.
  45 #undef isspace
  46 #undef iswspace
  47 #endif
  48
  49 namespace { // anonymous
  50
  51 template<class CharType>
  52 struct remove_whitespace_predicate;
  53
  54 template<>
  55 struct remove_whitespace_predicate<char>
  56 {
  57     bool operator()(unsigned char t){
  58         return ! std::isspace(t);
  59     }
  60 };
  61
  62 #ifndef BOOST_NO_CWCHAR
  63 template<>
  64 struct remove_whitespace_predicate<wchar_t>
  65 {
  66     bool operator()(wchar_t t){
  67         return ! std::iswspace(t);
  68     }
  69 };
  70 #endif
  71
  72 } // namespace anonymous
  73
  74 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  75 // convert base64 file data (including whitespace and padding) to binary
  76
  77 namespace boost {
  78 namespace archive {
  79 namespace iterators {
  80
  81 // custom version of filter iterator which doesn't look ahead further than
  82 // necessary
  83
  84 template<class Predicate, class Base>
  85 class filter_iterator
  86     : public boost::iterator_adaptor<
  87         filter_iterator<Predicate, Base>,
  88         Base,
  89         use_default,
  90         single_pass_traversal_tag
  91     >
  92 {
  93     friend class boost::iterator_core_access;
  94     typedef typename boost::iterator_adaptor<
  95         filter_iterator<Predicate, Base>,
  96         Base,
  97         use_default,
  98         single_pass_traversal_tag
  99     > super_t;
 100     typedef filter_iterator<Predicate, Base> this_t;
 101     typedef typename super_t::reference reference_type;
 102
 103     reference_type dereference_impl(){
 104         if(! m_full){
 105             while(! m_predicate(* this->base_reference()))
 106                 ++(this->base_reference());
 107             m_full = true;
 108         }
 109         return * this->base_reference();
 110     }
 111
 112     reference_type dereference() const {
 113         return const_cast<this_t *>(this)->dereference_impl();
 114     }
 115
 116     Predicate m_predicate;
 117     bool m_full;
 118 public:
 119     // note: this function is public only because comeau compiler complained
 120     // I don't know if this is because the compiler is wrong or what
 121     void increment(){
 122         m_full = false;
 123         ++(this->base_reference());
 124     }
 125     filter_iterator(Base start) :
 126         super_t(start),
 127         m_full(false)
 128     {}
 129     filter_iterator(){}
 130 };
 131
 132 template<class Base>
 133 class remove_whitespace :
 134     public filter_iterator<
 135         remove_whitespace_predicate<
 136             typename boost::iterator_value<Base>::type
 137             //typename Base::value_type
 138         >,
 139         Base
 140     >
 141 {
 142     friend class boost::iterator_core_access;
 143     typedef filter_iterator<
 144         remove_whitespace_predicate<
 145             typename boost::iterator_value<Base>::type
 146             //typename Base::value_type
 147         >,
 148         Base
 149     > super_t;
 150 public:
 151 //    remove_whitespace(){} // why is this needed?
 152     // make composible buy using templated constructor
 153     template<class T>
 154     remove_whitespace(T start) :
 155         super_t(Base(static_cast< T >(start)))
 156     {}
 157     // intel 7.1 doesn't like default copy constructor
 158     remove_whitespace(const remove_whitespace & rhs) :
 159         super_t(rhs.base_reference())
 160     {}
 161 };
 162
 163 } // namespace iterators
 164 } // namespace archive
 165 } // namespace boost
 166
 167 #endif // BOOST_ARCHIVE_ITERATORS_REMOVE_WHITESPACE_HPP