Added in errors, ability to specify lua file

main.c

@@ -7,13 +7,28 @@
 #define TB_IMPL
 #include "termbox.h"
 
+// Errors
+#define OCT_NO_LUA_FILE 1
+#define OCT_LUA_FILE_NOT_FOUND 2
+#define OCT_LUA_FILE_MISSING_OCT_INIT 3
+
 lua_State *L;
 
-int initialize_everything();
+int process_args(int argc, char* argv[]);
+int initialize_everything(char* lua_file);
 int deinitialize_everything();
+
 int main(int argc, char* argv[]) {
-	if (!initialize_everything()) {
-		fprintf(stderr, "Couldn't initialize Open Card Table");
+	int process_args_result = process_args(argc, argv);
+	switch (process_args_result) {
+	case OCT_NO_LUA_FILE:
+		fprintf(stderr, "No lua file given\n");
+		return EXIT_FAILURE;
+		break;
+	case OCT_LUA_FILE_NOT_FOUND:
+		fprintf(stderr, "Could not open file: %s\n", argv[argc-1]);
+		return EXIT_FAILURE;
+		break;
 	}
 	struct tb_event ev;
 	int finish = 0;
@@ -37,7 +52,15 @@ int main(int argc, char* argv[]) {
 	return EXIT_SUCCESS;
 }
 
-int initialize_everything() {
+int process_args(int argc, char* argv[]) {
+	if (argc == 1) { // Didn't specify a file
+		return OCT_NO_LUA_FILE;
+	}
+	// TODO define other cmd line args here
+	return initialize_everything(argv[argc-1]); // lua file should always be last argument
+}
+
+int initialize_everything(char* lua_file) {
 	if (!oct_tb_sprite_list_initialize()) {
 		return 0;
 	}
@@ -48,11 +71,11 @@ int initialize_everything() {
 	}
 	luaL_openlibs(L);
 	oct_tb_initialize_lua(L);
-	luaL_dofile(L, "pong.lua");
+	if (luaL_dofile(L, lua_file)) return OCT_LUA_FILE_NOT_FOUND;
 	lua_getglobal(L, "oct_init");
 	lua_call(L, 0, 0);
 	tb_init();
-	return 1;
+	return 0;
 }
 
 int deinitialize_everything() {