/*

 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")

 *

 * SPDX-License-Identifier: MPL-2.0

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, you can obtain one at https://mozilla.org/MPL/2.0/.

 *

 * See the COPYRIGHT file distributed with this work for additional

 * information regarding copyright ownership.

 */

/*! \file */

#include <stdlib.h>

#include <string.h>

#include <isc/region.h>

#include <isc/util.h>

int

isc_region_compare(isc_region_t *r1, isc_region_t *r2) {

  unsigned int l;

  int result;

  REQUIRE(r1 != NULL);

  REQUIRE(r2 != NULL);

  REQUIRE(r1->base != NULL);

  REQUIRE(r2->base != NULL);

  l = (r1->length < r2->length) ? r1->length : r2->length;

  if ((result = memcmp(r1->base, r2->base, l)) != 0) {

    return (result < 0) ? -1 : 1;

  } else {

    return (r1->length == r2->length)  ? 0

           : (r1->length < r2->length) ? -1

               : 1;

  }

}