utils: add helper wrapper for osmo_strlcpy()

Add wrapper for osmo_strlcpy() which uses sizeof() to automatically
determine buffer's size and use it for GSMTAP logging. This is pretty
common use case for osmo_strlcpy() so it's a good idea to save some
typing by using generic define.

Related: OS#2864
Change-Id: I03d0d3d32a8d572ad573d03c603e14cdc27a3f7b
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h
index 72266ae..f1e011f 100644
--- a/include/osmocom/core/utils.h
+++ b/include/osmocom/core/utils.h
@@ -26,6 +26,9 @@
 /*! Number of bytes necessary to store given BITS */
 #define OSMO_BYTES_FOR_BITS(BITS) ((BITS + 8 - 1) / 8)
 
+/*! Copy a C-string into a sized buffer using sizeof to detect buffer's size */
+#define OSMO_STRLCPY_ARRAY(array, src) osmo_strlcpy(array, src, sizeof(array))
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>