Use utarray to process index entries.

include/internal.h

@@ -0,0 +1,27 @@
+/*
+ * This file is part of the Aaru Data Preservation Suite.
+ * Copyright (c) 2019-2025 Natalia Portillo.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBAARUFORMAT_INTERNAL_H
+#define LIBAARUFORMAT_INTERNAL_H
+
+#include "utarray.h"
+
+UT_array *process_index_v1(aaruformatContext *ctx);
+int32_t   verify_index_v1(aaruformatContext *ctx);
+
+#endif  // LIBAARUFORMAT_INTERNAL_H