Merge pull request #11 from adafruit/ticks-exception-like-micropython

raise an OverflowError like micropython for too big a value
adafruit · Aug 9, 2024 · 26a51ab · 26a51ab
2 parents 527d90e + 892cca3
commit 26a51ab
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/adafruit_ticks.py b/adafruit_ticks.py
@@ -122,7 +122,9 @@ def ticks_ms() -> int:
 
 def ticks_add(ticks: int, delta: int) -> int:
     "Add a delta to a base number of ticks, performing wraparound at 2**29ms."
-    return (ticks + delta) % _TICKS_PERIOD
+    if -_TICKS_HALFPERIOD < delta < _TICKS_HALFPERIOD:
+        return (ticks + delta) % _TICKS_PERIOD
+    raise OverflowError("ticks interval overflow")
 
 
 def ticks_diff(ticks1: int, ticks2: int) -> int: