/*

 * The directory tree functions

 *

 * Copyright (C) 2008-2026, Joachim Metz <joachim.metz@gmail.com>

 *

 * Refer to AUTHORS for acknowledgements.

 *

 * This program 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 3 of the License, or

 * (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */

#include <common.h>

#include <types.h>

#include "libolecf_definitions.h"

#include "libolecf_directory_entry.h"

#include "libolecf_directory_list.h"

#include "libolecf_directory_tree.h"

#include "libolecf_libcdata.h"

#include "libolecf_libcerror.h"

#include "libolecf_libcnotify.h"

#include "libolecf_libuna.h"

#include "olecf_directory.h"

/* Create the directory tree from the directory entry list

 * Returns 1 if successful, 0 if no directory entries or -1 on error

 */

int libolecf_directory_tree_create(

     libcdata_tree_node_t **directory_tree_root_node,

     uint32_t *short_sector_stream_start_sector_identifier,

     libolecf_directory_entry_t **document_summary_information_directory_entry,

     libolecf_directory_entry_t **summary_information_directory_entry,

     libcdata_list_t *directory_entry_list,

     uint8_t byte_order,

     libcerror_error_t **error )

{

  libcdata_list_element_t *list_element       = NULL;

  libolecf_directory_entry_t *directory_entry = NULL;

  static char *function                       = "libolecf_directory_tree_create";

  int element_index                           = 0;

  int number_of_elements                      = 0;

  if( directory_tree_root_node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid directory tree root node.",

     function );

    return( -1 );

  }

  if( *directory_tree_root_node != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: directory tree root node already set.",

     function );

    return( -1 );

  }

  if( short_sector_stream_start_sector_identifier == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid short sector stream start sector identifier.",

     function );

    return( -1 );

  }

  if( libcdata_list_get_number_of_elements(

       directory_entry_list,

       &number_of_elements,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve number of elements in directory entry list.",

     function );

    goto on_error;

  }

  if( number_of_elements == 0 )

  {

    return( 0 );

  }

  if( libcdata_list_get_first_element(

       directory_entry_list,

       &list_element,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve first element of directory entry list.",

     function );

    goto on_error;

  }

  for( element_index = 0;

       element_index < number_of_elements;

       element_index++ )

  {

    if( libcdata_list_element_get_value(

         list_element,

         (intptr_t **) &directory_entry,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve value from element: %d.",

       function,

       element_index );

      goto on_error;

    }

    if( directory_entry == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

       "%s: missing directory entry: %d.",

       function,

       element_index );

      goto on_error;

    }

    if( directory_entry->type == LIBOLECF_ITEM_TYPE_ROOT_STORAGE )

    {

      break;

    }

    if( libcdata_list_element_get_next_element(

         list_element,

         &list_element,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve next element of element: %d.",

       function,

       element_index );

      goto on_error;

    }

  }

  if( list_element == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: unable to find root storage directory entry.",

     function );

    goto on_error;

  }

  if( directory_entry == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: missing directory entry: %d.",

     function,

     element_index );

    goto on_error;

  }

#if defined( HAVE_VERBOSE_OUTPUT ) || defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    if( element_index != 0 )

    {

      libcnotify_printf(

       "%s: root storage is not first directory entry.\n",

       function );

    }

    if( directory_entry->previous_directory_identifier != LIBOLECF_SECTOR_IDENTIFIER_UNUSED )

    {

      libcnotify_printf(

       "%s: previous directory identifier in root storage is not unused.\n",

       function );

    }

    if( directory_entry->next_directory_identifier != LIBOLECF_SECTOR_IDENTIFIER_UNUSED )

    {

      libcnotify_printf(

       "%s: next directory identifier in root storage is not unused.\n",

       function );

    }

  }

#endif

  if( directory_entry->sub_directory_identifier == LIBOLECF_SECTOR_IDENTIFIER_UNUSED )

  {

    return( 0 );

  }

  if( libcdata_tree_node_initialize(

       directory_tree_root_node,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create directory root node.",

     function );

    goto on_error;

  }

  if( libcdata_tree_node_set_value(

       *directory_tree_root_node,

       (intptr_t *) directory_entry,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to set directory root node value.",

     function );

    goto on_error;

  }

  *short_sector_stream_start_sector_identifier = directory_entry->sector_identifier;

  if( libolecf_directory_tree_create_process_entry(

       *directory_tree_root_node,

       directory_entry,

       document_summary_information_directory_entry,

       summary_information_directory_entry,

       directory_entry_list,

       directory_entry,

       byte_order,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to process sub directory entry.",

     function );

    goto on_error;

  }

  directory_entry->set_in_tree = 1;

  return( 1 );

on_error:

  if( *directory_tree_root_node != NULL )

  {

    /* The directory entry is managed by the list

     */

    libcdata_tree_node_free(

     directory_tree_root_node,

     NULL,

     NULL );

  }

  return( -1 );

}

/* Process the directory entry and adds it to the directory tree node

 * Returns 1 if successful or -1 on error

 */

int libolecf_directory_tree_create_process_entry(

     libcdata_tree_node_t *directory_tree_node,

     const libolecf_directory_entry_t *root_directory_entry,

     libolecf_directory_entry_t **document_summary_information_directory_entry,

     libolecf_directory_entry_t **summary_information_directory_entry,

     libcdata_list_t *directory_entry_list,

     libolecf_directory_entry_t *directory_entry,

     uint8_t byte_order,

     libcerror_error_t **error )

{

  libcdata_tree_node_t *parent_node               = NULL;

  libolecf_directory_entry_t *sub_directory_entry = NULL;

  libcdata_tree_node_t *tree_node                 = NULL;

  static char *function                           = "libolecf_directory_tree_create_process_entry";

  int result                                      = 0;

  if( directory_tree_node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid directory tree node.",

     function );

    return( -1 );

  }

  if( root_directory_entry == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid root directory entry.",

     function );

    return( -1 );

  }

  if( document_summary_information_directory_entry == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid document summary information directory entry.",

     function );

    return( -1 );

  }

  if( summary_information_directory_entry == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid summary information directory entry.",

     function );

    return( -1 );

  }

  if( directory_entry->name_size == 28 )

  {

    result = libuna_utf8_string_compare_with_utf16_stream(

              (uint8_t *) "\005DocumentSummaryInformation",

              28,

              directory_entry->name,

              directory_entry->name_size,

              byte_order,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GENERIC,

       "%s: unable to compare directory entry name.",

       function );

      goto on_error;

    }

    else if( result == LIBUNA_COMPARE_EQUAL )

    {

      *document_summary_information_directory_entry = directory_entry;

    }

  }

  else if( directory_entry->name_size == 20 )

  {

    result = libuna_utf8_string_compare_with_utf16_stream(

              (uint8_t *) "\005SummaryInformation",

              20,

              directory_entry->name,

              directory_entry->name_size,

              byte_order,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GENERIC,

       "%s: unable to compare directory entry name.",

       function );

      goto on_error;

    }

    else if( result == LIBUNA_COMPARE_EQUAL )

    {

      *summary_information_directory_entry = directory_entry;

    }

  }

  /* Process sub directory identifier

   */

  if( ( directory_entry->sub_directory_identifier != LIBOLECF_SECTOR_IDENTIFIER_UNUSED )

   && ( directory_entry->sub_directory_identifier != 0 )

   && ( root_directory_entry->directory_identifier == 0 ) )

  {

    result = libolecf_directory_list_get_element_by_identifier(

              directory_entry_list,

              directory_entry->sub_directory_identifier,

              &sub_directory_entry,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve sub directory entry list element: %" PRIu32 ".",

       function,

       directory_entry->sub_directory_identifier );

      goto on_error;

    }

    else if( result != 0 )

    {

      if( sub_directory_entry == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

         "%s: missing sub directory entry: %" PRIu32 ".",

         function,

         directory_entry->sub_directory_identifier );

        goto on_error;

      }

      if( sub_directory_entry->set_in_tree != 0 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

         "%s: directory entry tree node already set.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_initialize(

           &tree_node,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

         "%s: unable to create directory tree node.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_set_value(

           tree_node,

           (intptr_t *) sub_directory_entry,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to set directory tree node value.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_insert_node(

           directory_tree_node,

           tree_node,

           (int (*)(intptr_t *, intptr_t *, libcerror_error_t **)) &libolecf_directory_entry_compare,

           LIBCDATA_INSERT_FLAG_UNIQUE_ENTRIES,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

         "%s: unable to insert sub directory tree node.",

         function );

        goto on_error;

      }

      sub_directory_entry->set_in_tree = 1;

      if( libolecf_directory_tree_create_process_entry(

           tree_node,

           root_directory_entry,

           document_summary_information_directory_entry,

           summary_information_directory_entry,

           directory_entry_list,

           sub_directory_entry,

           byte_order,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to process sub directory entry.",

         function );

        tree_node = NULL;

        goto on_error;

      }

      tree_node = NULL;

    }

  }

  /* Process previous directory identifier

   */

  if( directory_entry->previous_directory_identifier != LIBOLECF_SECTOR_IDENTIFIER_UNUSED )

  {

    result = libolecf_directory_list_get_element_by_identifier(

              directory_entry_list,

              (int) directory_entry->previous_directory_identifier,

              &sub_directory_entry,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve previous directory entry: 0x%08" PRIx32 ".",

       function,

       directory_entry->previous_directory_identifier );

      goto on_error;

    }

    else if( result != 0 )

    {

      if( sub_directory_entry == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

         "%s: missing previous directory entry: %" PRIu32 ".",

         function,

         directory_entry->previous_directory_identifier );

        goto on_error;

      }

      if( sub_directory_entry->set_in_tree != 0 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

         "%s: directory entry tree node already set.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_initialize(

           &tree_node,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

         "%s: unable to create directory tree node.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_set_value(

           tree_node,

           (intptr_t *) sub_directory_entry,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to set directory tree node value.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_get_parent_node(

           directory_tree_node,

           &parent_node,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve parent node.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_insert_node(

           parent_node,

           tree_node,

           (int (*)(intptr_t *, intptr_t *, libcerror_error_t **)) &libolecf_directory_entry_compare,

           LIBCDATA_INSERT_FLAG_UNIQUE_ENTRIES,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

         "%s: unable to insert previous directory tree node.",

         function );

        goto on_error;

      }

      sub_directory_entry->set_in_tree = 1;

      if( libolecf_directory_tree_create_process_entry(

           tree_node,

           root_directory_entry,

           document_summary_information_directory_entry,

           summary_information_directory_entry,

           directory_entry_list,

           sub_directory_entry,

           byte_order,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to process previous directory entry.",

         function );

        tree_node = NULL;

        goto on_error;

      }

      tree_node = NULL;

    }

  }

  /* Process next directory identifier

   */

  if( directory_entry->next_directory_identifier != LIBOLECF_SECTOR_IDENTIFIER_UNUSED )

  {

    result = libolecf_directory_list_get_element_by_identifier(

              directory_entry_list,

              (int) directory_entry->next_directory_identifier,

              &sub_directory_entry,

              error );

    if( result != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve next directory entry: 0x%08" PRIx32 ".",

       function,

       directory_entry->next_directory_identifier );

      goto on_error;

    }

    else if( result != 0 )

    {

      if( sub_directory_entry == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

         "%s: missing next directory entry: %" PRIu32 ".",

         function,

         directory_entry->sub_directory_identifier );

        goto on_error;

      }

      if( sub_directory_entry->set_in_tree != 0 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

         "%s: directory entry tree node already set.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_initialize(

           &tree_node,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

         "%s: unable to create directory tree node.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_set_value(

           tree_node,

           (intptr_t *) sub_directory_entry,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to set directory tree node value.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_get_parent_node(

           directory_tree_node,

           &parent_node,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve parent node.",

         function );

        goto on_error;

      }

      if( libcdata_tree_node_insert_node(

           parent_node,

           tree_node,

           (int (*)(intptr_t *, intptr_t *, libcerror_error_t **)) &libolecf_directory_entry_compare,

           LIBCDATA_INSERT_FLAG_UNIQUE_ENTRIES,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

         "%s: unable to insert next directory tree node.",

         function );

        goto on_error;

      }

      sub_directory_entry->set_in_tree = 1;

      if( libolecf_directory_tree_create_process_entry(

           tree_node,

           root_directory_entry,

           document_summary_information_directory_entry,

           summary_information_directory_entry,

           directory_entry_list,

           sub_directory_entry,

           byte_order,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_SET_FAILED,

         "%s: unable to process next directory entry.",

         function );

        tree_node = NULL;

        goto on_error;

      }

      tree_node = NULL;

    }

  }

  return( 1 );

on_error:

  if( tree_node != NULL )

  {

    libcdata_tree_node_free(

     &tree_node,

     NULL,

     NULL );

  }

  return( -1 );

}

/* Retrieves the sub node for the specific UTF-8 formatted name

 * Returns 1 if successful, 0 if no such sub node or -1 on error

 */

int libolecf_directory_tree_get_sub_node_by_utf8_name(

     libcdata_tree_node_t *directory_tree_node,

     const uint8_t *utf8_string,

     size_t utf8_string_length,

     uint8_t byte_order,

     libcdata_tree_node_t **sub_directory_tree_node,

     libcerror_error_t **error )

{

  libcdata_tree_node_t *safe_sub_directory_tree_node = NULL;

  libolecf_directory_entry_t *sub_directory_entry    = NULL;

  static char *function                              = "libolecf_directory_tree_get_sub_node_by_utf8_name";

  int number_of_sub_nodex                            = 0;

  int result                                         = 0;

  int sub_node_index                                 = 0;

  if( directory_tree_node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid directory tree node.",

     function );

    return( -1 );

  }

  if( sub_directory_tree_node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid sub directory tree node.",

     function );

    return( -1 );

  }

  *sub_directory_tree_node = NULL;

  if( libcdata_tree_node_get_number_of_sub_nodes(

       directory_tree_node,

       &number_of_sub_nodex,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve number of sub nodex.",

     function );

    return( -1 );

  }

  for( sub_node_index = 0;

       sub_node_index < number_of_sub_nodex;

       sub_node_index++ )

        {

    if( libcdata_tree_node_get_sub_node_by_index(

         directory_tree_node,

         sub_node_index,

         &safe_sub_directory_tree_node,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve number of sub nodex: %d.",

       function,

       sub_node_index );

      return( -1 );

    }

    if( libcdata_tree_node_get_value(

         safe_sub_directory_tree_node,

         (intptr_t **) &sub_directory_entry,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve value from sub directory tree node: %d.",

       function,

       sub_node_index );

      return( -1 );

    }

    if( sub_directory_entry == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

       "%s: missing sub directory entry: %d.",

       function,

       sub_node_index );

      return( -1 );

    }

    result = libuna_utf8_string_compare_with_utf16_stream(

              utf8_string,

              utf8_string_length,

              sub_directory_entry->name,

              sub_directory_entry->name_size,

              byte_order,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GENERIC,

       "%s: unable to compare sub directory entry: %d name.",

       function,

       sub_node_index );

      return( -1 );

    }

    else if( result == LIBUNA_COMPARE_EQUAL )

    {

      *sub_directory_tree_node = safe_sub_directory_tree_node;

      return( 1 );

    }

  }

  return( 0 );

}

/* Retrieves the sub node for the specific UTF-16 formatted name

 * Returns 1 if successful, 0 if no such sub node or -1 on error

 */

int libolecf_directory_tree_get_sub_node_by_utf16_name(

     libcdata_tree_node_t *directory_tree_node,

     const uint16_t *utf16_string,

     size_t utf16_string_length,

     uint8_t byte_order,

     libcdata_tree_node_t **sub_directory_tree_node,

     libcerror_error_t **error )

{

  libcdata_tree_node_t *safe_sub_directory_tree_node = NULL;

  libolecf_directory_entry_t *sub_directory_entry    = NULL;

  static char *function                              = "libolecf_directory_tree_get_sub_node_by_utf16_name";

  int number_of_sub_nodex                            = 0;

  int result                                         = 0;

  int sub_node_index                                 = 0;

  if( directory_tree_node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid directory tree node.",

     function );

    return( -1 );

  }

  if( sub_directory_tree_node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,