msgb: Add non-inlined helper functions to ease with language bindings

It is easier from languages that dlopen libosmocore to have a function
to access this data than to poke at the bytes of the struct directly. Add
copyright for this method and the reset method I did earlier this year.

include/osmocore/msgb.h

@@ -187,4 +187,9 @@ static inline struct msgb *msgb_alloc_headroom(int size, int headroom,
 	return msg;
 }
 
+/* non inline functions to ease binding */
+uint8_t *msgb_data(const struct msgb *msg);
+uint16_t msgb_length(const struct msgb *msg);
+
+
 #endif /* _MSGB_H */

src/msgb.c

@@ -1,4 +1,5 @@
 /* (C) 2008 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
  * All Rights Reserved
  *
  * This program is free software; you can redistribute it and/or modify
@@ -88,3 +89,13 @@ void msgb_reset(struct msgb *msg)
 
 	memset(&msg->cb, 0, sizeof(msg->cb));
 }
+
+uint8_t *msgb_data(const struct msgb *msg)
+{
+	return msg->data;
+}
+
+uint16_t msgb_length(const struct msgb *msg)
+{
+	return msg->len;
+}