Support multilang, update code

Signed-off-by: R4SAS <r4sas@i2pmail.org>

libi2pd/FS.cpp

@@ -12,6 +12,7 @@
 #ifdef _WIN32
 #include <shlobj.h>
 #include <windows.h>
+#include <codecvt>
 #endif
 
 #include "Base.h"
@@ -41,6 +42,18 @@ namespace fs {
 		return dataDir;
 	}
 
+	const std::string GetUTF8DataDir () {
+#ifdef _WIN32
+		boost::filesystem::wpath path (dataDir);
+		auto loc = boost::filesystem::path::imbue(std::locale( std::locale(), new std::codecvt_utf8_utf16<wchar_t>() ) ); // convert path to UTF-8
+		auto dataDirUTF8 = path.string();
+		boost::filesystem::path::imbue(loc); // Return locale settings back
+		return dataDirUTF8;
+#else
+		return dataDir; // linux, osx, android uses UTF-8 by default
+#endif
+	}
+
 	void DetectDataDir(const std::string & cmdline_param, bool isService) {
 		if (cmdline_param != "") {
 			dataDir = cmdline_param;