lab4

golang/lab4/ship.go

@@ -0,0 +1,79 @@
+package lab4
+
+import "errors"
+
+const fieldWidth = 8
+const fieldHeight = 8
+const maxShipLength = 4
+
+type ship struct {
+	width  uint8
+	height uint8
+	x      uint8
+	y      uint8
+}
+
+func NewShip(width, height, x, y uint8) (*ship, error) {
+	if width > 1 && height > 1 {
+		return nil, errors.New("Unsupported ship sizes.")
+	}
+
+	if width == 0 || height == 0 {
+		return nil, errors.New("Unsupported ship sizes.")
+	}
+
+	if width > maxShipLength || height > maxShipLength {
+		return nil, errors.New("Unsupported ship sizes.")
+	}
+
+	ship := ship{
+		width:  width,
+		height: height,
+	}
+
+	error := ship.SetX(x)
+	if error != nil {
+		return nil, error
+	}
+
+	error = ship.SetY(y)
+	if error != nil {
+		return nil, error
+	}
+
+	return &ship, nil
+}
+
+func (instance *ship) Width() uint8 {
+	return instance.width
+}
+
+func (instance *ship) Height() uint8 {
+	return instance.height
+}
+
+func (instance *ship) X() uint8 {
+	return instance.x
+}
+
+func (instance *ship) Y() uint8 {
+	return instance.y
+}
+
+func (instance *ship) SetX(x uint8) error {
+	if x+instance.width > fieldWidth {
+		return errors.New("Ship go out of field bounds.")
+	}
+
+	instance.x = x
+	return nil
+}
+
+func (instance *ship) SetY(y uint8) error {
+	if y+instance.height > fieldHeight {
+		return errors.New("Ship go out of field bounds.")
+	}
+
+	instance.y = y
+	return nil
+}