gsm_utils: Just add some constant and timekeeping utils
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/include/osmocore/gsm_utils.h b/include/osmocore/gsm_utils.h
index c87e967..195e865 100644
--- a/include/osmocore/gsm_utils.h
+++ b/include/osmocore/gsm_utils.h
@@ -27,6 +27,13 @@
#include <stdint.h>
+#define ADD_MODULO(sum, delta, modulo) do { \
+ if ((sum += delta) >= modulo) \
+ sum -= modulo; \
+ } while (0)
+
+#define GSM_MAX_FN (26*51*2048)
+
struct gsm_time {
uint32_t fn; /* FN count */
uint16_t t1; /* FN div (26*51) */