qcdm: add DM protocol utilities and testcases

Bits for CRC calculation and frame escaping/unescaping.

libqcdm/src/utils.h

@@ -0,0 +1,37 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef UTILS_H
+#define UTILS_H
+
+#include <glib.h>
+
+guint16 crc16 (const char *buffer, gsize len);
+
+gsize dm_escape (const char *inbuf,
+                 gsize inbuf_len,
+                 char *outbuf,
+                 gsize outbuf_len);
+
+gsize dm_unescape (const char *inbuf,
+                   gsize inbuf_len,
+                   char *outbuf,
+                   gsize outbuf_len,
+                   gboolean *escaping);
+
+#endif  /* UTILS_H */
+