Further directx cleaning.

src/core/StringUtils.cpp

@@ -173,6 +173,23 @@ std::string StringUtils::convert(const std::wstring& input)
 #endif
 }
 
+std::wstring StringUtils::convert(const std::string& input)
+{
+    if (input.empty())
+    {
+        return std::wstring();
+    }
+
+#ifdef _WIN32
+    const auto charsNeeded = ::MultiByteToWideChar(CP_UTF8, 0, input.data(), (int)input.size(), NULL, 0);
+    std::vector<wchar_t> buffer(charsNeeded);
+    const auto charsConverted = ::MultiByteToWideChar(CP_UTF8, 0, input.data(), (int)input.size(), &buffer[0], buffer.size());
+    return std::wstring(&buffer[0], charsConverted);
+#else
+    throw std::logic_error("Not implemented");
+#endif
+}
+
 std::string StringUtils::toPaddedString(unsigned numBytes, unsigned entry)
 {
     std::stringstream sstr;

src/core/StringUtils.h

@@ -20,6 +20,8 @@ public:
 
     static std::string convert(const std::wstring& input);
 
+    static std::wstring convert(const std::string& input);
+
     static bool isAlphaNumeric(char c);
 
     static bool isAlphabetical(char c);