projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | // |
| 2 | // Copyright (c) 2015 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_UTF8_CODECVT_HPP | |
| 9 | #define BOOST_LOCALE_UTF8_CODECVT_HPP | |
| 10 | ||
| 11 | #include <boost/locale/utf.hpp> | |
| 12 | #include <boost/locale/generic_codecvt.hpp> | |
| 13 | #include <boost/cstdint.hpp> | |
| 14 | #include <locale> | |
| 15 | ||
| 16 | namespace boost { | |
| 17 | namespace locale { | |
| 18 | ||
| 19 | /// | |
| 20 | /// \brief Geneneric utf8 codecvt facet, it allows to convert UTF-8 strings to UTF-16 and UTF-32 using wchar_t, char32_t and char16_t | |
| 21 | /// | |
| 22 | template<typename CharType> | |
| 23 | class utf8_codecvt : public generic_codecvt<CharType,utf8_codecvt<CharType> > | |
| 24 | { | |
| 25 | public: | |
| 26 | ||
| 27 | struct state_type {}; | |
| 28 | ||
| 29 | utf8_codecvt(size_t refs = 0) : generic_codecvt<CharType,utf8_codecvt<CharType> >(refs) | |
| 30 | { | |
| 31 | } | |
| 32 | ||
| 33 | static int max_encoding_length() | |
| 34 | { | |
| 35 | return 4; | |
| 36 | } | |
| 37 | ||
| 38 | static state_type initial_state(generic_codecvt_base::initial_convertion_state /* unused */) | |
| 39 | { | |
| 40 | return state_type(); | |
| 41 | } | |
| 42 | static utf::code_point to_unicode(state_type &,char const *&begin,char const *end) | |
| 43 | { | |
| 44 | char const *p=begin; | |
| 45 | ||
| 46 | utf::code_point c = utf::utf_traits<char>::decode(p,end); | |
| 47 | if(c!=utf::illegal && c!=utf::incomplete) | |
| 48 | begin = p; | |
| 49 | return c; | |
| 50 | } | |
| 51 | ||
| 52 | static utf::code_point from_unicode(state_type &,utf::code_point u,char *begin,char const *end) | |
| 53 | { | |
| 54 | if(!utf::is_valid_codepoint(u)) | |
| 55 | return utf::illegal; | |
| 56 | int width; | |
| 57 | if((width=utf::utf_traits<char>::width(u)) > end - begin) | |
| 58 | return utf::incomplete; | |
| 59 | utf::utf_traits<char>::encode(u,begin); | |
| 60 | return width; | |
| 61 | } | |
| 62 | }; | |
| 63 | ||
| 64 | } // locale | |
| 65 | } // namespace boost | |
| 66 | ||
| 67 | #endif | |
| 68 | /// | |
| 69 | // vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4 |