twn_util.c: add file_read()

src/twn_util.c

@@ -154,6 +154,24 @@ char *file_to_str(const char *path) {
     return str_out;
 }
 
+static char **read_files;
+
+char const *file_read(char const *file) {
+    char *s = file_to_str(file);
+
+    if (s) arrpush(read_files, s);
+
+    return s;
+}
+
+
+void file_read_garbage_collect(void) {
+    for (size_t i = 0; i < arrlenu(read_files); ++i)
+        SDL_free(read_files[i]);
+    arrfree(read_files);
+    read_files = NULL;
+}
+
 
 bool file_exists(const char *path) {
     return PHYSFS_exists(path);