Add types.h, standardize integer types on stdint

src/game.c

@@ -104,7 +104,8 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_init()
     camera.x = 0;
     camera.y = 0;
     camera.w = game.screenwidth;
-    camera.h = game.screenheight;    
+    camera.h = game.screenheight;
+    SUCCEED(errctx);
 }
 
 void akgl_game_updateFPS()
@@ -119,3 +120,20 @@ void akgl_game_updateFPS()
     game.framesSinceUpdate += 1;
     game.lastIterTime = curTime;
 }
+
+akerr_ErrorContext AKERR_NOIGNORE *akgl_game_save(char *fpath)
+{
+    FILE *fp = NULL;
+    PREPARE_ERROR(errctx);
+
+    FAIL_ZERO_RETURN(errctx, fpath, AKERR_NULLPOINTER, "NULL file path");
+    fp = fopen(fpath, "rb");
+    fclose(fp);
+    SUCCEED(errctx); // SUCCEED_NORETURN if in main().
+}
+
+akerr_ErrorContext AKERR_NOIGNORE *akgl_game_load(char *fpath)
+{
+    PREPARE_ERROR(errctx);
+    SUCCEED(errctx);
+}