/*

 * 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.

 */

#include <string.h>

#include <isc/mem.h>

#include <isc/util.h>

#include "viewname_p.h"

static const char default_view[] = "_default";

static const char bind_view[] = "_bind";

const char *

dns__viewname_get(const dns_viewname_t *name) {

  return name->name;

}

const char *

dns__viewname_display(const dns_viewname_t *name) {

  if (name->name == default_view || name->name == bind_view) {

    return NULL;

  }

  return name->name;

}

void

dns__viewname_free(dns_viewname_t *name, isc_mem_t *mctx) {

  if (dns__viewname_display(name) != NULL) {

    char *value = (char *)name->name;

    isc_mem_free(mctx, value);

  }

  name->name = NULL;

}

void

dns__viewname_set(dns_viewname_t *name, isc_mem_t *mctx, const char *value) {

  REQUIRE(value != NULL);

  /* Reattaching a view of the same name leaves logging storage intact. */

  if (name->name != NULL && strcmp(name->name, value) == 0) {

    return;

  }

  const char *replacement = NULL;

  if (value[0] == '_' && strcmp(value, default_view) == 0) {

    replacement = default_view;

  } else if (value[0] == '_' && strcmp(value, bind_view) == 0) {

    replacement = bind_view;

  } else {

    replacement = isc_mem_strdup(mctx, value);

  }

  dns__viewname_free(name, mctx);

  name->name = replacement;

}