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|
package gcc
import "fmt"
type state int
const (
stateIncrease state = iota
stateDecrease
stateHold
)
func (s state) transition(u usage) state {
switch s {
case stateHold:
switch u {
case usageOver:
return stateDecrease
case usageNormal:
return stateIncrease
case usageUnder:
return stateHold
}
case stateIncrease:
switch u {
case usageOver:
return stateDecrease
case usageNormal:
return stateIncrease
case usageUnder:
return stateHold
}
case stateDecrease:
switch u {
case usageOver:
return stateDecrease
case usageNormal:
return stateHold
case usageUnder:
return stateHold
}
}
return stateIncrease
}
func (s state) String() string {
switch s {
case stateIncrease:
return "increase"
case stateDecrease:
return "decrease"
case stateHold:
return "hold"
default:
return fmt.Sprintf("invalid state: %d", s)
}
}
|
