1 files changed, 79 insertions, 0 deletions
diff --git a/examples/life.cff b/examples/life.cff
new file mode 100644
index 0000000..cd1cc2e
--- /dev/null
+++ b/examples/life.cff
@@ -0,0 +1,79 @@
+import "libc.hff";
+
+def W = 60, H = 40;
+
+typedef Board [(W * H)/8]u8;
+static board Board = {};
+
+fn get(b *Board, x uint, y uint) bool {
+   x %= W; y %= H;
+   let idx = x + (y * W);
+   return (*b)[idx / 8] & (1 << (idx % 8)) != 0;
+}
+
+fn set(b *Board, x uint, y uint, set bool) void {
+   x %= W; y %= H;
+   let idx = x + (y * W);
+   (*b)[idx / 8] &= ~(1 << (idx % 8));
+   if set {
+      (*b)[idx / 8] |= (1 << (idx % 8));
+   }
+}
+
+fn next(b *Board) void {
+   let temp Board = *b;
+   for let y = 0; y < H; ++y {
+      for let x = 0; x < W; ++x {
+         defmacro C(ox,oy) [ (as(int)get(&temp, x + ox, y + oy)) ]
+         let n = C(-1,-1) + C(0,-1) + C(1,-1)
+               + C(-1, 0)      +      C(1, 0)
+               + C(-1, 1) + C(0, 1) + C(1, 1);
+
+         set(b, x, y, #f);
+         if get(&temp, x, y) {
+            set(b, x, y, n == 3);
+         } else if n == 2 {
+            set(b, x, y, #t);
+         } else if n == 3 {
+            set(b, x, y, #t);
+         }
+      }
+   }
+}
+
+fn draw(b *Board) void {
+   printf("\x1B[H\n");
+   printf("\n");
+   for let y = 0; y < H; ++y {
+      printf(" ");
+      for let x = 0; x < W; ++x {
+         if get(b, x, y) {
+            printf("W");
+         } else {
+            printf(" ");
+         }
+      }
+      printf(" \n");
+   }
+}
+
+extern fn time(*void) int;
+fn init(b *Board) void {
+   let rnd u32 = time(#null);
+   for let y = 0; y < H; ++y {
+      for let x = 0; x < W; ++x {
+         set(b, x, y, as(bool)((rnd >> 31) & 1));
+         rnd = (rnd * 134775813) + 1;
+      }
+   }
+}
+
+extern fn usleep(u32) void;
+extern fn main() void {
+   init(&board);
+   for ;; {
+      draw(&board);
+      usleep(100);
+      next(&board);
+   }
+}