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
70
71
72
73
74
75
76
|
/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
#pragma once
#include "antlr4-common.h"
#ifdef USE_UTF8_INSTEAD_OF_CODECVT
#include "utf8.h"
#endif
namespace antlrcpp {
// For all conversions utf8 <-> utf32.
// I wouldn't prefer wstring_convert because: according to
// https://en.cppreference.com/w/cpp/locale/wstring_convert,
// wstring_convert is deprecated in C++17.
// utfcpp (https://github.com/nemtrif/utfcpp) is a substitution.
#ifndef USE_UTF8_INSTEAD_OF_CODECVT
// VS 2015 and VS 2017 have different bugs in std::codecvt_utf8<char32_t> (VS 2013 works fine).
#if defined(_MSC_VER) && _MSC_VER >= 1900 && _MSC_VER < 2000
typedef std::wstring_convert<std::codecvt_utf8<__int32>, __int32> UTF32Converter;
#else
typedef std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> UTF32Converter;
#endif
#endif
// The conversion functions fails in VS2017, so we explicitly use a workaround.
template<typename T>
inline std::string utf32_to_utf8(T const& data)
{
#ifndef USE_UTF8_INSTEAD_OF_CODECVT
// Don't make the converter static or we have to serialize access to it.
thread_local UTF32Converter converter;
#if defined(_MSC_VER) && _MSC_VER >= 1900 && _MSC_VER < 2000
const auto p = reinterpret_cast<const int32_t *>(data.data());
return converter.to_bytes(p, p + data.size());
#else
return converter.to_bytes(data);
#endif
#else
std::string narrow;
utf8::utf32to8(data.begin(), data.end(), std::back_inserter(narrow));
return narrow;
#endif
}
inline UTF32String utf8_to_utf32(const char* first, const char* last)
{
#ifndef USE_UTF8_INSTEAD_OF_CODECVT
thread_local UTF32Converter converter;
#if defined(_MSC_VER) && _MSC_VER >= 1900 && _MSC_VER < 2000
auto r = converter.from_bytes(first, last);
i32string s = reinterpret_cast<const int32_t *>(r.data());
return s;
#else
std::u32string s = converter.from_bytes(first, last);
return s;
#endif
#else
UTF32String wide;
utf8::utf8to32(first, last, std::back_inserter(wide));
return wide;
#endif
}
void replaceAll(std::string &str, std::string const& from, std::string const& to);
// string <-> wstring conversion (UTF-16), e.g. for use with Window's wide APIs.
ANTLR4CPP_PUBLIC std::string ws2s(std::wstring const& wstr);
ANTLR4CPP_PUBLIC std::wstring s2ws(std::string const& str);
}
|
