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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 |