Merge pull request #2096 from Vort/utf8

implement UTF-8 conversion with WinAPI for Windows platform

Win32/Win32App.cpp

@@ -313,7 +313,7 @@ namespace win32
 					}
 					case ID_DATADIR:
 					{
-						std::string datadir(i2p::fs::GetUTF8DataDir());
+						std::string datadir(i2p::fs::GetDataDir());
 						ShellExecute(NULL, "explore", datadir.c_str(), NULL, NULL, SW_SHOWNORMAL);
 						return 0;
 					}

libi2pd/FS.cpp

@@ -61,15 +61,17 @@ namespace fs {
 
 	const std::string GetUTF8DataDir () {
 #ifdef _WIN32
-#if ((BOOST_VERSION >= 108500) || STD_FILESYSTEM)
+		int size = MultiByteToWideChar(CP_ACP, 0,
-		fs_lib::path path (dataDir);
+			dataDir.c_str(), dataDir.size(), nullptr, 0);
-#else
+		std::wstring utf16Str(size, L'\0');
-		fs_lib::wpath path (dataDir);
+		MultiByteToWideChar(CP_ACP, 0,
-#endif
+			dataDir.c_str(), dataDir.size(), &utf16Str[0], size);
-		auto loc = fs_lib::path::imbue(std::locale( std::locale(), new std::codecvt_utf8_utf16<wchar_t>() ) ); // convert path to UTF-8
+		int utf8Size = WideCharToMultiByte(CP_UTF8, 0,
-		auto dataDirUTF8 = path.string();
+			utf16Str.c_str(), utf16Str.size(), nullptr, 0, nullptr, nullptr);
-		fs_lib::path::imbue(loc); // Return locale settings back
+		std::string utf8Str(utf8Size, '\0');
-		return dataDirUTF8;
+		WideCharToMultiByte(CP_UTF8, 0,
+			utf16Str.c_str(), utf16Str.size(), &utf8Str[0], utf8Size, nullptr, nullptr);
+		return utf8Str;
 #else
 		return dataDir; // linux, osx, android uses UTF-8 by default
 #endif