Function to_wpath

OgreMain/src/OgreFileSystem.cpp:168–179

	//-----------------------------------------------------------------------
#ifdef _OGRE_FILESYSTEM_ARCHIVE_UNICODE
	static std::wstring to_wpath(const String& text, unsigned codepage = CP_UTF8)
	{
		const int utf16Length = ::MultiByteToWideChar(codepage, 0, text.c_str(), (int)text.size(), NULL, 0);
		if(utf16Length > 0)
		{
			std::wstring wt;
			wt.resize(utf16Length);
			if(0 != ::MultiByteToWideChar(codepage, 0, text.c_str(), (int)text.size(), &wt[0], (int)wt.size()))
				return wt;
		}
		return L"";
	}
	static String from_wpath(const std::wstring& text, unsigned codepage = CP_UTF8)
	{
		const int length = ::WideCharToMultiByte(codepage, 0, text.c_str(), (int)text.size(), NULL, 0, NULL, NULL);