gistfile1.cpp

//previous non-STL version:
u32 vfsDevice::CmpLocalPath(const wxString& local_path)
{
	wxFileName path0(m_local_path);
	path0.Normalize();
	const wxString full_local_path = path0.GetFullPath();

	if (local_path.Len() < full_local_path.Len())
		return 0;

	wxArrayString arr0 = wxSplit(path0.GetFullPath(), '\\');
	wxArrayString arr1 = wxSplit(local_path, '\\');

	const u32 lim = min(arr0.GetCount(), arr1.GetCount());
	u32 ret = 0;

	for(u32 i=0; i<lim; ret += arr0[i++].Len() + 1)
	{
		if(arr0[i].CmpNoCase(arr1[i]) != 0)
		{
			break;
		}
	}

	return ret;
}



//half STL-version, <filesystem> in c++14 or c++17 should make this a little better
u32 vfsDevice::CmpLocalPath(const wxString& local_path)
{
	wxFileName path0(m_local_path);
	path0.Normalize();
	const wxString full_local_path = path0.GetFullPath();

	if (local_path.Len() < full_local_path.Len())
		return 0;


	std::locale loc;
	auto charType = *local_path.begin();
	auto pos = std::mismatch(
					std::begin(full_local_path),
					std::end(full_local_path),
					std::begin(local_path), 
					[&loc](decltype(charType) &a, decltype(charType) &b)
					{
						return std::tolower(a, loc) == std::tolower(b, loc);
					});

	if (pos.first == std::end(full_local_path))
	{
		return full_local_path.size();
	}
	else
	{
		const char *seperators = "/\\";
		auto last_sep = std::find_first_of(std::reverse_iterator<wxString::const_iterator>(pos.first),
						std::reverse_iterator<wxString::const_iterator>(std::begin(full_local_path)),
						seperators, seperators+3);
		if (last_sep == std::reverse_iterator<wxString::const_iterator>(std::begin(full_local_path)))
		{
			//Path without slashes?
			return 0;
		}
		else
		{
			return last_sep.base()-std::begin(full_local_path);
		}
	}
}