kiss-lang/lime
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Custom wstring to UTF-8 string conversion function (codecvt may not be included in some toolchains and was deprecated in C++17 anyway).

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This commit is contained in:
Adam Hojka
2022-06-11 18:30:26 +02:00
parent 17edd0435c
commit 981d02e411
1 changed files with 53 additions and 9 deletions
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62
project/src/ExternalInterface.cpp
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@@ -48,8 +48,8 @@
#include <utils/compress/Zlib.h>
#include <vm/NekoVM.h>
#ifdef HX_WINDOWS
#include <locale>
#ifndef ANDROID
#include <codecvt>
#endif
#include <memory>
@@ -137,14 +137,58 @@ namespace lime {
std::string wstring_utf8 (const std::wstring& val) {
#ifdef ANDROID
struct codecvt : public std::codecvt<wchar_t, char, std::mbstate_t> {
~codecvt () = default;
};
return std::wstring_convert<codecvt> ().to_bytes (val);
#else
return std::wstring_convert<std::codecvt_utf8<wchar_t>> ().to_bytes (val);
#endif
std::string out;
unsigned int codepoint = 0;
for (const wchar_t chr : val) {
if (chr >= 0xd800 && chr <= 0xdbff) {
codepoint = ((chr - 0xd800) << 10) + 0x10000;
} else {
if (chr >= 0xdc00 && chr <= 0xdfff) {
codepoint |= chr - 0xdc00;
} else {
codepoint = chr;
}
if (codepoint <= 0x7f) {
out.append (1, static_cast<char> (codepoint));
} else if (codepoint <= 0x7ff) {
out.append (1, static_cast<char> (0xc0 | ((codepoint >> 6) & 0x1f)));
out.append (1, static_cast<char> (0x80 | (codepoint & 0x3f)));
} else if (codepoint <= 0xffff) {
out.append (1, static_cast<char> (0xe0 | ((codepoint >> 12) & 0x0f)));
out.append (1, static_cast<char> (0x80 | ((codepoint >> 6) & 0x3f)));
out.append (1, static_cast<char> (0x80 | (codepoint & 0x3f)));
} else {
out.append (1, static_cast<char> (0xf0 | ((codepoint >> 18) & 0x07)));
out.append (1, static_cast<char> (0x80 | ((codepoint >> 12) & 0x3f)));
out.append (1, static_cast<char> (0x80 | ((codepoint >> 6) & 0x3f)));
out.append (1, static_cast<char> (0x80 | (codepoint & 0x3f)));
}
codepoint = 0;
}
}
return out;
}