gsm: add GetOperatorID method

Returns the ID of the operator that issued the SIM card.

Cleanups and get_mnc_length_done() by me (dcbw).

src/mm-utils.h

@@ -0,0 +1,24 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ */
+
+#ifndef MM_UTILS_H
+#define MM_UTILS_H
+
+int utils_hex2byte (const char *hex);
+
+char *utils_hexstr2bin (const char *hex, gsize *out_len);
+
+#endif  /* MM_UTILS_H */
+