/*
 * @BEGIN LICENSE
 *
 * Psi4: an open-source quantum chemistry software package
 *
 * Copyright (c) 2007-2019 The Psi4 Developers.
 *
 * The copyrights for code used from other parties are included in
 * the corresponding files.
 *
 * This file is part of Psi4.
 *
 * Psi4 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, version 3.
 *
 * Psi4 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 Psi4; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * @END LICENSE
 */

/*!
 \file
 \ingroup PSIO
 */

#include "psi4/libpsio/psio.h"

namespace psi {
/*!
 ** PSIO_GET_GLOBAL_ADDRESS(): Given the global starting address for a
 ** TOC entry and a relative offset within the entry, compute the global
 ** address for the offset.
 **
 ** \ingroup PSIO
 */

psio_address psio_get_global_address(psio_address entry_start, psio_address rel_address) {
    psio_address address;

    address.page = entry_start.page + rel_address.page;
    address.offset = entry_start.offset + rel_address.offset;
    if ((entry_start.offset + rel_address.offset) >= PSIO_PAGELEN) {
        address.offset -= PSIO_PAGELEN;
        address.page++;
    }

    return (address);
}

}  // namespace psi
