comment: Osmocom_Types.ttcn: clarify f_rnd_int() return val

Change-Id: I0841b037d39fcadb75e1c13cf97d22917b68e2aa

1 files changed, 2 insertions, 1 deletions

diff --git a/library/Osmocom_Types.ttcn b/library/Osmocom_Types.ttcn
index e55f1d6c..994a0cc7 100644
--- a/library/Osmocom_Types.ttcn
+++ b/library/Osmocom_Types.ttcn
@@ -49,7 +49,8 @@ module Osmocom_Types {
 		uint15_t	arfcn
 	} with { variant "" };
 
-	/* return random integer between 0 and max */
+	/* return random integer 0 <= ret < max. According to ETSI ES 201 873 C.6.1, rnd() returns *less* than 1, so
+	 * the returned int will always be ret < max, or ret <= (max-1). */
 	function f_rnd_int(integer max) return integer {
 		return float2int(rnd()*int2float(max));
 	}