blob: a037c3d5935b127472e647ca9a28f04efd77f315 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
//
// Copyright (c) 2015 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_LOCALE_UTF8_CODECVT_HPP
#define BOOST_LOCALE_UTF8_CODECVT_HPP
#include <boost/locale/utf.hpp>
#include <boost/locale/generic_codecvt.hpp>
#include <boost/cstdint.hpp>
#include <locale>
namespace boost {
namespace locale {
///
/// \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
///
template<typename CharType>
class utf8_codecvt : public generic_codecvt<CharType,utf8_codecvt<CharType> >
{
public:
struct state_type {};
utf8_codecvt(size_t refs = 0) : generic_codecvt<CharType,utf8_codecvt<CharType> >(refs)
{
}
static int max_encoding_length()
{
return 4;
}
static state_type initial_state(generic_codecvt_base::initial_convertion_state /* unused */)
{
return state_type();
}
static utf::code_point to_unicode(state_type &,char const *&begin,char const *end)
{
char const *p=begin;
utf::code_point c = utf::utf_traits<char>::decode(p,end);
if(c!=utf::illegal && c!=utf::incomplete)
begin = p;
return c;
}
static utf::code_point from_unicode(state_type &,utf::code_point u,char *begin,char const *end)
{
if(!utf::is_valid_codepoint(u))
return utf::illegal;
int width;
if((width=utf::utf_traits<char>::width(u)) > end - begin)
return utf::incomplete;
utf::utf_traits<char>::encode(u,begin);
return width;
}
};
} // locale
} // namespace boost
#endif
///
// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
|
