bool => uint8

rle/rle.go

@@ -120,7 +120,7 @@ func removeWhitespace(input string) string {
 }
 
 // Store a grid to an RLE file
-func StoreGridToRLE(grid [][]bool, filename, rule string, width, height int) error {
+func StoreGridToRLE(grid [][]uint8, filename, rule string, width, height int) error {
 	fd, err := os.Create(filename)
 	if err != nil {
 		return err
@@ -132,7 +132,7 @@ func StoreGridToRLE(grid [][]bool, filename, rule string, width, height int) err
 		line := ""
 		for x := 0; x < width; x++ {
 			char := "b"
-			if grid[y][x] {
+			if grid[y][x] == 1 {
 				char = "o"
 			}
 

src/config.go

@@ -44,8 +44,8 @@ type Config struct {
 
 const (
 	VERSION = "v0.0.8"
-	Alive   = true
+	Alive   = 1
-	Dead    = false
+	Dead    = 0
 
 	DEFAULT_GRID_WIDTH  = 600
 	DEFAULT_GRID_HEIGHT = 400

src/grid.go

@@ -13,16 +13,16 @@ import (
 )
 
 type Cell struct {
-	State         bool
+	State         uint8
 	Neighbors     [8]*Cell
 	NeighborCount int
 }
 
-func (cell *Cell) Count() int {
+func (cell *Cell) Count() uint8 {
-	count := 0
+	var count uint8
 
 	for idx := 0; idx < cell.NeighborCount; idx++ {
-		count += bool2int(cell.Neighbors[idx].State)
+		count += cell.Neighbors[idx].State
 	}
 
 	return count
@@ -97,7 +97,7 @@ func (grid *Grid) SetupNeighbors(x, y int) {
 }
 
 // count the living neighbors of a cell
-func (grid *Grid) CountNeighbors(x, y int) int {
+func (grid *Grid) CountNeighbors(x, y int) uint8 {
 	return grid.Data[y][x].Count()
 }
 
@@ -124,7 +124,7 @@ func (grid *Grid) Copy(other *Grid) {
 func (grid *Grid) Clear() {
 	for y := range grid.Data {
 		for x := range grid.Data[y] {
-			grid.Data[y][x].State = false
+			grid.Data[y][x].State = 0
 		}
 	}
 }
@@ -135,7 +135,7 @@ func (grid *Grid) FillRandom() {
 		for y := range grid.Data {
 			for x := range grid.Data[y] {
 				if rand.Intn(grid.Config.Density) == 1 {
-					grid.Data[y][x].State = true
+					grid.Data[y][x].State = 1
 				}
 			}
 		}
@@ -145,7 +145,7 @@ func (grid *Grid) FillRandom() {
 func (grid *Grid) Dump() {
 	for y := 0; y < grid.Config.Height; y++ {
 		for x := 0; x < grid.Config.Width; x++ {
-			if grid.Data[y][x].State {
+			if grid.Data[y][x].State == 1 {
 				fmt.Print("XX")
 			} else {
 				fmt.Print("  ")
@@ -168,7 +168,7 @@ func (grid *Grid) LoadRLE(pattern *rle.RLE) {
 					x = colIndex + startX
 					y = rowIndex + startY
 
-					grid.Data[y][x].State = true
+					grid.Data[y][x].State = 1
 				}
 			}
 		}
@@ -279,7 +279,7 @@ func (grid *Grid) SaveState(filename, rule string) error {
 	for y := range grid.Data {
 		for _, cell := range grid.Data[y] {
 			row := "."
-			if cell.State {
+			if cell.State == 1 {
 				row = "o"
 			}
 

src/play.go

@@ -99,8 +99,8 @@ func (scene *ScenePlay) SetNext(next SceneName) {
 	scene.Next = next
 }
 
-func (scene *ScenePlay) CheckRule(state bool, neighbors int) bool {
+func (scene *ScenePlay) CheckRule(state uint8, neighbors uint8) uint8 {
-	var nextstate bool
+	var nextstate uint8
 
 	// The standard Scene of Life is symbolized in rule-string notation
 	// as B3/S23 (23/3 here).  A cell  is born if it has exactly three
@@ -108,9 +108,9 @@ func (scene *ScenePlay) CheckRule(state bool, neighbors int) bool {
 	// and  dies otherwise. The first  number, or list of  numbers, is
 	// what is required for a dead cell to be born.
 
-	if !state && Contains(scene.Config.Rule.Birth, neighbors) {
+	if state != 1 && Contains(scene.Config.Rule.Birth, neighbors) {
 		nextstate = Alive
-	} else if state && Contains(scene.Config.Rule.Death, neighbors) {
+	} else if state == 1 && Contains(scene.Config.Rule.Death, neighbors) {
 		nextstate = Alive
 	} else {
 		nextstate = Dead
@@ -393,10 +393,10 @@ func (scene *ScenePlay) SaveRectRLE() {
 		height = scene.Mark.Y - scene.Point.Y
 	}
 
-	grid := make([][]bool, height)
+	grid := make([][]uint8, height)
 
 	for y := 0; y < height; y++ {
-		grid[y] = make([]bool, width)
+		grid[y] = make([]uint8, width)
 
 		for x := 0; x < width; x++ {
 			grid[y][x] = scene.Grids[scene.Index].Data[y+starty][x+startx].State
@@ -445,7 +445,7 @@ func (scene *ScenePlay) Update() error {
 }
 
 // set a cell to alive or dead
-func (scene *ScenePlay) ToggleCellOnCursorPos(alive bool) {
+func (scene *ScenePlay) ToggleCellOnCursorPos(alive uint8) {
 	// use cursor pos relative to the world
 	worldX, worldY := scene.Camera.ScreenToWorld(ebiten.CursorPosition())
 	x := int(worldX) / scene.Config.Cellsize
@@ -478,7 +478,7 @@ func (scene *ScenePlay) Draw(screen *ebiten.Image) {
 			if scene.Config.ShowEvolution {
 				scene.DrawEvolution(screen, x, y, op)
 			} else {
-				if scene.Grids[scene.Index].Data[y][x].State {
+				if scene.Grids[scene.Index].Data[y][x].State == 1 {
 					scene.World.DrawImage(scene.Theme.Tile(ColLife), op)
 				}
 			}

src/rule.go

@@ -9,13 +9,13 @@ import (
 // a GOL rule
 type Rule struct {
 	Definition string
-	Birth      []int
+	Birth      []uint8
-	Death      []int
+	Death      []uint8
 }
 
 // parse one part of a GOL rule into rule slice
-func NumbersToList(numbers string) []int {
+func NumbersToList(numbers string) []uint8 {
-	list := []int{}
+	list := []uint8{}
 
 	items := strings.Split(numbers, "")
 	for _, item := range items {
@@ -24,7 +24,7 @@ func NumbersToList(numbers string) []int {
 			log.Fatalf("failed to parse game rule part <%s>: %s", numbers, err)
 		}
 
-		list = append(list, num)
+		list = append(list, uint8(num))
 	}
 
 	return list