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182
Task/Snake/Kotlin/snake.kotlin
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182
Task/Snake/Kotlin/snake.kotlin
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// Kotlin Native v0.5
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import kotlinx.cinterop.*
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import platform.posix.*
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import platform.windows.*
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const val WID = 60
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const val HEI = 30
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const val MAX_LEN = 600
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const val NUL = '\u0000'
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enum class Dir { NORTH, EAST, SOUTH, WEST }
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class Snake {
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val console: HANDLE
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var alive = false
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val brd = CharArray(WID * HEI)
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var dir = Dir.NORTH
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val snk = nativeHeap.allocArray<COORD>(MAX_LEN)
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lateinit var head: COORD
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var tailIdx = 0
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var headIdx = 0
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var points = 0
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init {
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console = GetStdHandle(STD_OUTPUT_HANDLE)!!
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SetConsoleTitleW("Snake")
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memScoped {
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val coord = alloc<COORD>().apply { X = (WID + 1).toShort(); Y = (HEI + 2).toShort() }
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SetConsoleScreenBufferSize(console, coord.readValue())
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val rc = alloc<SMALL_RECT>().apply {
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Left = 0; Top = 0; Right = WID.toShort(); Bottom = (HEI + 1).toShort()
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}
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SetConsoleWindowInfo(console, TRUE, rc.ptr)
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val ci = alloc<CONSOLE_CURSOR_INFO>().apply { dwSize = 1; bVisible = FALSE }
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SetConsoleCursorInfo(console, ci.ptr)
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}
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}
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fun play() {
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while (true) {
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createfield()
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alive = true
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while (alive) {
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drawfield()
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readKey()
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moveSnake()
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Sleep(50)
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}
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memScoped {
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val c = alloc<COORD>().apply { X = 0; Y = (HEI + 1).toShort() }
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SetConsoleCursorPosition(console, c.readValue())
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}
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SetConsoleTextAttribute(console, 0x000b)
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print("Play again [Y/N]? ")
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val a = readLine()!!.toLowerCase()
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if (a.length > 0 && a[0] != 'y') {
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nativeHeap.free(snk)
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return
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}
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}
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}
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private fun createfield() {
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memScoped {
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val coord = alloc<COORD>().apply { X = 0; Y = 0 }
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val c = alloc<DWORDVar>()
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FillConsoleOutputCharacterW(console, 32, (HEI + 2) * 80, coord.readValue(), c.ptr)
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FillConsoleOutputAttribute(console, 0x0000, (HEI + 2) * 80, coord.readValue(), c.ptr)
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SetConsoleCursorPosition(console, coord.readValue())
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}
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for (x in 0 until WID * HEI) brd[x] = NUL
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for (x in 0 until WID) {
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brd[x + WID * (HEI - 1)] = '+'
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brd[x] = '+'
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}
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for (y in 1 until HEI) {
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brd[WID - 1 + WID * y] = '+'
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brd[WID * y] = '+'
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}
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var xx: Int
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var yy: Int
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do {
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xx = rand() % WID
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yy = rand() % (HEI shr 1) + (HEI shr 1)
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}
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while (brd[xx + WID * yy] != NUL)
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brd[xx + WID * yy] = '@'
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tailIdx = 0
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headIdx = 4
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xx = 3
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yy = 2
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for (cc in tailIdx until headIdx) {
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brd[xx + WID * yy] = '#'
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snk[cc].X = (3 + cc).toShort()
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snk[cc].Y = 2
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}
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head = snk[3]
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dir = Dir.EAST
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points = 0
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}
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private fun readKey() {
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if ((GetAsyncKeyState(39).toInt() and 0x8000) != 0) dir = Dir.EAST
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if ((GetAsyncKeyState(37).toInt() and 0x8000) != 0) dir = Dir.WEST
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if ((GetAsyncKeyState(38).toInt() and 0x8000) != 0) dir = Dir.NORTH
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if ((GetAsyncKeyState(40).toInt() and 0x8000) != 0) dir = Dir.SOUTH
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}
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private fun drawfield() {
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memScoped {
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val coord = alloc<COORD>()
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var t = NUL
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for (y in 0 until HEI) {
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coord.Y = y.toShort()
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for (x in 0 until WID) {
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t = brd[x + WID * y]
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if (t == NUL) continue
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coord.X = x.toShort()
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SetConsoleCursorPosition(console, coord.readValue())
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if (coord.X == head.X && coord.Y == head.Y) {
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SetConsoleTextAttribute(console, 0x002e)
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print('O')
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SetConsoleTextAttribute(console, 0x0000)
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continue
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}
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when (t) {
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'#' -> SetConsoleTextAttribute(console, 0x002a)
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'+' -> SetConsoleTextAttribute(console, 0x0019)
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'@' -> SetConsoleTextAttribute(console, 0x004c)
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}
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print(t)
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SetConsoleTextAttribute(console, 0x0000)
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}
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}
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print(t)
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SetConsoleTextAttribute(console, 0x0007)
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val c = alloc<COORD>().apply { X = 0; Y = HEI.toShort() }
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SetConsoleCursorPosition(console, c.readValue())
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print("Points: $points")
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}
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}
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private fun moveSnake() {
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when (dir) {
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Dir.NORTH -> head.Y--
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Dir.EAST -> head.X++
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Dir.SOUTH -> head.Y++
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Dir.WEST -> head.X--
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}
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val t = brd[head.X + WID * head.Y]
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if (t != NUL && t != '@') {
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alive = false
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return
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}
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brd[head.X + WID * head.Y] = '#'
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snk[headIdx].X = head.X
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snk[headIdx].Y = head.Y
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if (++headIdx >= MAX_LEN) headIdx = 0
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if (t == '@') {
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points++
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var x: Int
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var y: Int
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do {
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x = rand() % WID
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y = rand() % (HEI shr 1) + (HEI shr 1)
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}
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while (brd[x + WID * y] != NUL)
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brd[x + WID * y] = '@'
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return
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}
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SetConsoleCursorPosition(console, snk[tailIdx].readValue())
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print(' ')
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brd[snk[tailIdx].X + WID * snk[tailIdx].Y] = NUL
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if (++tailIdx >= MAX_LEN) tailIdx = 0
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}
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}
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fun main(args: Array<String>) {
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srand(time(null).toInt())
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Snake().play()
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}
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