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1 | // |
2 | // Copyright (c) 2009-2011 Artyom Beilis (Tonkikh) | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. (See | |
5 | // accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | // | |
8 | #ifndef BOOST_LOCALE_BOUNDARY_FACETS_HPP_INCLUDED | |
9 | #define BOOST_LOCALE_BOUNDARY_FACETS_HPP_INCLUDED | |
10 | ||
11 | #include <boost/locale/config.hpp> | |
12 | #include <boost/locale/boundary/types.hpp> | |
13 | #ifdef BOOST_MSVC | |
14 | # pragma warning(push) | |
15 | # pragma warning(disable : 4275 4251 4231 4660) | |
16 | #endif | |
17 | #include <locale> | |
18 | #include <vector> | |
19 | ||
20 | ||
21 | ||
22 | ||
23 | namespace boost { | |
24 | ||
25 | namespace locale { | |
26 | ||
27 | /// | |
28 | /// \brief This namespae contains all operations required for boundary analysis of text | |
29 | /// | |
30 | namespace boundary { | |
31 | /// | |
32 | /// \addtogroup boundary | |
33 | /// | |
34 | /// @{ | |
35 | /// | |
36 | ||
37 | ||
38 | /// | |
39 | /// \brief This structure is used for representing boundary point | |
40 | /// that follows the offset. | |
41 | /// | |
42 | struct break_info { | |
43 | ||
44 | /// | |
45 | /// Create empty break point at beginning | |
46 | /// | |
47 | break_info() : | |
48 | offset(0), | |
49 | rule(0) | |
50 | { | |
51 | } | |
52 | /// | |
53 | /// Create empty break point at offset v. | |
54 | /// it is useful for order comparison with other points. | |
55 | /// | |
56 | break_info(size_t v) : | |
57 | offset(v), | |
58 | rule(0) | |
59 | { | |
60 | } | |
61 | ||
62 | /// | |
63 | /// Offset from the beggining of the text where a break occurs. | |
64 | /// | |
65 | size_t offset; | |
66 | /// | |
67 | /// The identification of this break point according to | |
68 | /// various break types | |
69 | /// | |
70 | rule_type rule; | |
71 | ||
72 | /// | |
73 | /// Compare two break points' offset. Allows to search with | |
74 | /// standard algorithms over the index. | |
75 | /// | |
76 | bool operator<(break_info const &other) const | |
77 | { | |
78 | return offset < other.offset; | |
79 | } | |
80 | }; | |
81 | ||
82 | /// | |
83 | /// This type holds the analysis of the text - all its break points | |
84 | /// with marks | |
85 | /// | |
86 | typedef std::vector<break_info> index_type; | |
87 | ||
88 | ||
89 | template<typename CharType> | |
90 | class boundary_indexing; | |
91 | ||
92 | #ifdef BOOST_LOCALE_DOXYGEN | |
93 | /// | |
94 | /// \brief This facet generates an index for boundary analysis | |
95 | /// for a given text. | |
96 | /// | |
97 | /// It is specialized for 4 types of characters \c char_t, \c wchar_t, \c char16_t and \c char32_t | |
98 | /// | |
99 | template<typename Char> | |
100 | class BOOST_LOCALE_DECL boundary_indexing : public std::locale::facet { | |
101 | public: | |
102 | /// | |
103 | /// Default constructor typical for facets | |
104 | /// | |
105 | boundary_indexing(size_t refs=0) : std::locale::facet(refs) | |
106 | { | |
107 | } | |
108 | /// | |
109 | /// Create index for boundary type \a t for text in range [begin,end) | |
110 | /// | |
111 | /// The returned value is an index of type \ref index_type. Note that this | |
112 | /// index is never empty, even if the range [begin,end) is empty it consists | |
113 | /// of at least one boundary point with the offset 0. | |
114 | /// | |
115 | virtual index_type map(boundary_type t,Char const *begin,Char const *end) const = 0; | |
116 | /// | |
117 | /// Identification of this facet | |
118 | /// | |
119 | static std::locale::id id; | |
120 | ||
121 | #if defined (__SUNPRO_CC) && defined (_RWSTD_VER) | |
122 | std::locale::id& __get_id (void) const { return id; } | |
123 | #endif | |
124 | }; | |
125 | ||
126 | #else | |
127 | ||
128 | template<> | |
129 | class BOOST_LOCALE_DECL boundary_indexing<char> : public std::locale::facet { | |
130 | public: | |
131 | boundary_indexing(size_t refs=0) : std::locale::facet(refs) | |
132 | { | |
133 | } | |
134 | virtual index_type map(boundary_type t,char const *begin,char const *end) const = 0; | |
135 | static std::locale::id id; | |
136 | #if defined (__SUNPRO_CC) && defined (_RWSTD_VER) | |
137 | std::locale::id& __get_id (void) const { return id; } | |
138 | #endif | |
139 | }; | |
140 | ||
141 | template<> | |
142 | class BOOST_LOCALE_DECL boundary_indexing<wchar_t> : public std::locale::facet { | |
143 | public: | |
144 | boundary_indexing(size_t refs=0) : std::locale::facet(refs) | |
145 | { | |
146 | } | |
147 | virtual index_type map(boundary_type t,wchar_t const *begin,wchar_t const *end) const = 0; | |
148 | ||
149 | static std::locale::id id; | |
150 | #if defined (__SUNPRO_CC) && defined (_RWSTD_VER) | |
151 | std::locale::id& __get_id (void) const { return id; } | |
152 | #endif | |
153 | }; | |
154 | ||
155 | #ifdef BOOST_LOCALE_ENABLE_CHAR16_T | |
156 | template<> | |
157 | class BOOST_LOCALE_DECL boundary_indexing<char16_t> : public std::locale::facet { | |
158 | public: | |
159 | boundary_indexing(size_t refs=0) : std::locale::facet(refs) | |
160 | { | |
161 | } | |
162 | virtual index_type map(boundary_type t,char16_t const *begin,char16_t const *end) const = 0; | |
163 | static std::locale::id id; | |
164 | #if defined (__SUNPRO_CC) && defined (_RWSTD_VER) | |
165 | std::locale::id& __get_id (void) const { return id; } | |
166 | #endif | |
167 | }; | |
168 | #endif | |
169 | ||
170 | #ifdef BOOST_LOCALE_ENABLE_CHAR32_T | |
171 | template<> | |
172 | class BOOST_LOCALE_DECL boundary_indexing<char32_t> : public std::locale::facet { | |
173 | public: | |
174 | boundary_indexing(size_t refs=0) : std::locale::facet(refs) | |
175 | { | |
176 | } | |
177 | virtual index_type map(boundary_type t,char32_t const *begin,char32_t const *end) const = 0; | |
178 | static std::locale::id id; | |
179 | #if defined (__SUNPRO_CC) && defined (_RWSTD_VER) | |
180 | std::locale::id& __get_id (void) const { return id; } | |
181 | #endif | |
182 | }; | |
183 | #endif | |
184 | ||
185 | #endif | |
186 | ||
187 | /// | |
188 | /// @} | |
189 | /// | |
190 | ||
191 | ||
192 | } // boundary | |
193 | ||
194 | } // locale | |
195 | } // boost | |
196 | ||
197 | ||
198 | #ifdef BOOST_MSVC | |
199 | #pragma warning(pop) | |
200 | #endif | |
201 | ||
202 | #endif | |
203 | // vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4 |