1 files changed, 53 insertions, 0 deletions
diff --git a/serial/src/game.c b/serial/src/game.c
new file mode 100644
index 0000000..2921e3c
--- /dev/null
+++ b/serial/src/game.c
@@ -0,0 +1,53 @@
+#include "game.h"
+
+int neighbors(struct GAME* game, int x, int y) {
+  int n = 0;
+  for (int dy = -1; dy <= 1; dy++) {
+    for (int dx = -1; dx <= 1; dx++) {
+      if (!(dx == 0 && dy == 0) && (x+dx) > 0 && (y+dy) > 0 && (x+dx) < game->width+(game->padding*2) && (y+dy) < game->height+(game->padding*2)) {
+        if (game->grid[y+dy][x+dx]) {
+          n++;
+        }
+      }
+    }
+  }
+
+  return n;
+}
+
+void next(struct GAME* game) {
+  unsigned char** newGrid = malloc(sizeof(unsigned char*) * (game->height+(game->padding*2)));
+  int size = sizeof(unsigned char) * (game->width+(game->padding*2));
+  for (int y = 0; y < game->height+(game->padding*2); y++) {
+    newGrid[y] = malloc(size);
+    memset(newGrid[y], 0, size);
+  }
+
+  for (int y = 0; y < game->height+(game->padding*2); y++) {
+    for (int x = 0; x < game->width+(game->padding*2); x++) {
+      int my_neighbors = neighbors(game, x, y);
+      if (game->grid[y][x]) {
+        if (my_neighbors < 2 || my_neighbors > 3) {
+          newGrid[y][x] = 0;
+        } else  {
+          newGrid[y][x] = 1;
+        }
+      } else {
+        if (my_neighbors == 3) {
+          newGrid[y][x] = 1;
+        }
+      }
+    }
+  }
+
+  free(game->grid);
+  game->grid = newGrid;
+}
+
+void randomize(struct GAME* game) {
+  for (int y = game->padding; y < game->height+game->padding; y++) {
+    for (int x = game->padding; x < game->width+game->padding; x++) {
+      game->grid[y][x] = rand() & 1;
+    }
+  }
+}