nil check for StateMachine.IsValid

soypat · soypat · commit 8245dcbf8b17 · 2023-11-10T19:58:27.000-03:00
diff --git a/rp2-pio/statemachine.go b/rp2-pio/statemachine.go
@@ -48,7 +48,7 @@ func (sm StateMachine) StateMachineIndex() uint8 { return sm.index }
 
 // IsValid returns true if state machine is a valid instance.
 func (sm StateMachine) IsValid() bool {
-	return (sm.pio.hw == rp.PIO0 || sm.pio.hw == rp.PIO1) && sm.index <= 3
+	return sm.pio != nil && (sm.pio.hw == rp.PIO0 || sm.pio.hw == rp.PIO1) && sm.index <= 3
 }
 
 // Init initializes the state machine

Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,7 @@ func (sm StateMachine) StateMachineIndex() uint8 { return sm.index }`
`48`	`48`
`49`	`49`	`// IsValid returns true if state machine is a valid instance.`
`50`	`50`	`func (sm StateMachine) IsValid() bool {`
`51`		`- return (sm.pio.hw == rp.PIO0 \|\| sm.pio.hw == rp.PIO1) && sm.index <= 3`
	`51`	`+ return sm.pio != nil && (sm.pio.hw == rp.PIO0 \|\| sm.pio.hw == rp.PIO1) && sm.index <= 3`
`52`	`52`	`}`
`53`	`53`
`54`	`54`	`// Init initializes the state machine`