1 files changed, 9 insertions, 0 deletions
diff --git a/internal/util/math.go b/internal/util/math.go
index e1850f772..f6e78fa1c 100644
--- a/internal/util/math.go
+++ b/internal/util/math.go
@@ -23,6 +23,15 @@ type Number interface {
 		~uintptr | ~float32 | ~float64
 }
 
+// Decr performs a safe decrement of
+// n, clamping minimum value at zero.
+func Decr[N Number](n N) N {
+	if n <= 0 {
+		return 0
+	}
+	return n - 1
+}
+
 // Div performs a safe division of
 // n1 and n2, checking for zero n2. In the
 // case of zero n2, zero is returned.