getLocalDevicePathType

fn getLocalDevicePathType(comptime T: type, path: []const T) LocalDevicePathType {
    if (std.debug.runtime_safety) {
        assert(Dir.path.getWin32PathType(T, path) == .local_device);
    }

    const backslash = std.mem.nativeToLittle(T, '\\');
    const all_backslash = path[0] == backslash and
        path[1] == backslash and
        path[3] == backslash;
    return switch (path[2]) {
        std.mem.nativeToLittle(T, '?') => if (all_backslash) .verbatim else .fake_verbatim,
        std.mem.nativeToLittle(T, '.') => .local_device,
        else => unreachable,
    };
}