204 lines
6.8 KiB
C++
204 lines
6.8 KiB
C++
//
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// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_LOCALE_BOUNDARY_FACETS_HPP_INCLUDED
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#define BOOST_LOCALE_BOUNDARY_FACETS_HPP_INCLUDED
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#include <boost/locale/config.hpp>
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#include <boost/locale/boundary/types.hpp>
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#ifdef BOOST_MSVC
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# pragma warning(push)
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# pragma warning(disable : 4275 4251 4231 4660)
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#endif
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#include <locale>
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#include <vector>
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namespace boost {
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namespace locale {
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///
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/// \brief This namespae contains all operations required for boundary analysis of text
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///
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namespace boundary {
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///
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/// \addtogroup boundary
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///
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/// @{
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///
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///
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/// \brief This structure is used for representing boundary point
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/// that follows the offset.
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///
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struct break_info {
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///
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/// Create empty break point at beginning
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///
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break_info() :
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offset(0),
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rule(0)
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{
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}
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///
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/// Create empty break point at offset v.
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/// it is useful for order comparison with other points.
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///
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break_info(size_t v) :
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offset(v),
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rule(0)
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{
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}
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///
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/// Offset from the beggining of the text where a break occurs.
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///
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size_t offset;
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///
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/// The identification of this break point according to
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/// various break types
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///
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rule_type rule;
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///
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/// Compare two break points' offset. Allows to search with
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/// standard algorithms over the index.
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///
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bool operator<(break_info const &other) const
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{
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return offset < other.offset;
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}
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};
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///
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/// This type holds the analysis of the text - all its break points
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/// with marks
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///
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typedef std::vector<break_info> index_type;
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template<typename CharType>
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class boundary_indexing;
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#ifdef BOOST_LOCALE_DOXYGEN
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///
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/// \brief This facet generates an index for boundary analysis
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/// for a given text.
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///
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/// It is specialized for 4 types of characters \c char_t, \c wchar_t, \c char16_t and \c char32_t
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///
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template<typename Char>
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class BOOST_LOCALE_DECL boundary_indexing : public std::locale::facet {
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public:
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///
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/// Default constructor typical for facets
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///
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boundary_indexing(size_t refs=0) : std::locale::facet(refs)
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{
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}
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///
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/// Create index for boundary type \a t for text in range [begin,end)
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///
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/// The returned value is an index of type \ref index_type. Note that this
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/// index is never empty, even if the range [begin,end) is empty it consists
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/// of at least one boundary point with the offset 0.
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///
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virtual index_type map(boundary_type t,Char const *begin,Char const *end) const = 0;
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///
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/// Identification of this facet
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///
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static std::locale::id id;
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#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
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std::locale::id& __get_id (void) const { return id; }
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#endif
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};
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#else
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template<>
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class BOOST_LOCALE_DECL boundary_indexing<char> : public std::locale::facet {
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public:
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boundary_indexing(size_t refs=0) : std::locale::facet(refs)
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{
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}
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virtual index_type map(boundary_type t,char const *begin,char const *end) const = 0;
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static std::locale::id id;
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#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
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std::locale::id& __get_id (void) const { return id; }
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#endif
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};
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template<>
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class BOOST_LOCALE_DECL boundary_indexing<wchar_t> : public std::locale::facet {
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public:
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boundary_indexing(size_t refs=0) : std::locale::facet(refs)
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{
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}
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virtual index_type map(boundary_type t,wchar_t const *begin,wchar_t const *end) const = 0;
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static std::locale::id id;
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#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
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std::locale::id& __get_id (void) const { return id; }
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#endif
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};
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#ifdef BOOST_LOCALE_ENABLE_CHAR16_T
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template<>
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class BOOST_LOCALE_DECL boundary_indexing<char16_t> : public std::locale::facet {
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public:
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boundary_indexing(size_t refs=0) : std::locale::facet(refs)
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{
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}
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virtual index_type map(boundary_type t,char16_t const *begin,char16_t const *end) const = 0;
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static std::locale::id id;
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#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
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std::locale::id& __get_id (void) const { return id; }
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#endif
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};
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#endif
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#ifdef BOOST_LOCALE_ENABLE_CHAR32_T
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template<>
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class BOOST_LOCALE_DECL boundary_indexing<char32_t> : public std::locale::facet {
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public:
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boundary_indexing(size_t refs=0) : std::locale::facet(refs)
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{
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}
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virtual index_type map(boundary_type t,char32_t const *begin,char32_t const *end) const = 0;
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static std::locale::id id;
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#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
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std::locale::id& __get_id (void) const { return id; }
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#endif
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};
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#endif
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#endif
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///
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/// @}
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///
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} // boundary
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} // locale
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} // boost
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#endif
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#endif
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// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
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