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package main

// clampMin ensures value is at least min (saturate at minimum).
func clampMin(value, min int) int {
	if value < min {
		return min
	}
	return value
}

// clampMax ensures value is at most max (saturate at maximum).
func clampMax(value, max int) int {
	if value > max {
		return max
	}
	return value
}

// clampRange ensures value is within [min, max] (inclusive).
func clampRange(value, min, max int) int {
	if value < min {
		return min
	}
	if value > max {
		return max
	}
	return value
}

// clampIndex clamps index to valid slice bounds [0, count-1].
// Returns 0 if count is 0 (empty slice).
func clampIndex(index, count int) int {
	if count == 0 {
		return 0
	}
	if index < 0 {
		return 0
	}
	if index >= count {
		return count - 1
	}
	return index
}

// saturatingDec decrements value by 1, but doesn't go below min.
func saturatingDec(value, min int) int {
	if value > min {
		return value - 1
	}
	return min
}

// saturatingInc increments value by 1, but doesn't go above max.
func saturatingInc(value, max int) int {
	if value < max {
		return value + 1
	}
	return max
}

// saturatingAdd adds delta to value, but doesn't exceed max.
func saturatingAdd(value, delta, max int) int {
	result := value + delta
	if result > max {
		return max
	}
	return result
}

// saturatingSub subtracts delta from value, but doesn't go below min.
func saturatingSub(value, delta, min int) int {
	result := value - delta
	if result < min {
		return min
	}
	return result
}