2 files changed, 23 insertions, 13 deletions
diff --git a/lib.h b/lib.h
new file mode 100644
index 0000000..bebc1df
--- /dev/null
+++ b/lib.h
@@ -0,0 +1,22 @@
+#ifndef LIB_H
+#define LIB_H
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+typedef struct State
+{
+  // Sandpiles
+  unsigned char *data;
+  size_t dwidth;
+
+  size_t window_len;
+  int multiplier;
+
+  bool thread_alive;
+} state_t;
+
+bool load_from_file(state_t *state, const char *filepath);
+bool write_to_file(state_t *state, const char *filepath);
+
+#endif
diff --git a/main.c b/main.c
index c20662d..ab11790 100644
--- a/main.c
+++ b/main.c
@@ -13,19 +13,7 @@
 #include <raylib.h>
 #include <raymath.h>
 
-struct State
-{
-  // Sandpiles
-  unsigned char *data;
-  size_t dwidth;
-
-  size_t window_len;
-  int multiplier;
-
-  bool thread_alive;
-};
-
-typedef struct State state_t;
+#include "./lib.h"
 
 void step(state_t *state)
 {