From ee1bbd0204064a20cbf89003da15151f1214fb2a Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Wed, 24 Aug 2022 18:03:02 +0200
Subject: i don't know how to use phi nodes sorry

---
 examples/life.c   | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 examples/life.cff |  7 +----
 2 files changed, 85 insertions(+), 6 deletions(-)
 create mode 100644 examples/life.c

(limited to 'examples')

diff --git a/examples/life.c b/examples/life.c
new file mode 100644
index 0000000..212ece9
--- /dev/null
+++ b/examples/life.c
@@ -0,0 +1,84 @@
+#include <stdio.h>
+
+#define W 60
+#define H 40
+
+typedef unsigned char Board[W*H/8];
+static Board board;
+
+static _Bool
+get(Board *b, unsigned x, unsigned y) {
+   x %= W; y %= H;
+   unsigned idx = x + y * W;
+   return (*b)[idx/8] & (1 << (idx % 8));
+}
+
+static void
+set(Board *b, unsigned x, unsigned y, _Bool set) {
+   x %= W; y %= H;
+   unsigned idx = x + y * W;
+   (*b)[idx/8] &= ~(1 << (idx % 8));
+   if (set)
+      (*b)[idx/8] |= (1 << (idx % 8));
+}
+
+static void
+next(Board *b) {
+   Board temp;
+   memcpy(temp, &**b, sizeof temp);
+   for (int y = 0; y < H; ++y)
+      for (int x = 0; x < W; ++x) {
+         #define C(ox, oy) get(&temp, x + ox, y + oy)
+         int 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, 0);
+         if (get(&temp, x, y))
+            set(b, x, y, n == 3);
+         else if (n == 2)
+            set(b, x, y, 1);
+         else if (n == 3)
+            set(b, x, y, 1);
+      }
+}
+
+static
+void draw(Board *b) {
+   printf("\x1B[H\n");
+   printf("\n");
+   for (int y = 0; y < H; ++y) {
+      printf(" ");
+      for (int x = 0; x < W; ++x) {
+         if (get(b, x, y)) {
+            printf("W");
+         } else {
+            printf(" ");
+         }
+      }
+      printf(" \n");
+   }
+}
+
+
+static void
+init(Board *b) {
+   int time(void *);
+   unsigned rnd = time(0);
+   for (int y = 0; y < H; ++y) {
+      for (int x = 0; x < W; ++x) {
+         set(b, x, y, (_Bool)((rnd >> 31) & 1));
+         rnd = (rnd * 134775813) + 1;
+      }
+   }
+}
+
+void usleep(unsigned);
+int main () {
+   init(&board);
+   for (;;) {
+      draw(&board);
+      usleep(100);
+      next(&board);
+   }
+}
diff --git a/examples/life.cff b/examples/life.cff
index 791916f..e9c4dce 100644
--- a/examples/life.cff
+++ b/examples/life.cff
@@ -29,12 +29,7 @@ fn next(b *Board) void {
                + 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 or n == 3 {
-            set(b, x, y, #t);
-         }
+         set(b, x, y, get(&temp, x, y) ? n == 3 : (n == 2 or n == 3));
       }
    }
 }
-- 
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