/*

 * The extents (overflow) B-tree file functions

 *

 * Copyright (C) 2009-2026, 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 <byte_stream.h>

#include <types.h>

#include "libfshfs_definitions.h"

#include "libfshfs_btree_file.h"

#include "libfshfs_btree_node_cache.h"

#include "libfshfs_extent.h"

#include "libfshfs_extents_btree_file.h"

#include "libfshfs_extents_btree_key.h"

#include "libfshfs_file_record.h"

#include "libfshfs_libbfio.h"

#include "libfshfs_libcdata.h"

#include "libfshfs_libcerror.h"

#include "libfshfs_libcnotify.h"

#include "libfshfs_unused.h"

#include "fshfs_extents_file.h"

/* Retrieves the extents B-tree key from a specific B-tree node record

 * Returns 1 if successful or -1 on error

 */

int libfshfs_extents_btree_file_get_key_from_node_by_index(

     libfshfs_btree_node_t *node,

     uint16_t record_index,

     libfshfs_extents_btree_key_t **node_key,

     libcerror_error_t **error )

{

  libfshfs_btree_node_record_t *node_record   = NULL;

  libfshfs_extents_btree_key_t *safe_node_key = NULL;

  static char *function                       = "libfshfs_extents_btree_file_get_key_from_node_by_index";

  if( node_key == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid extents B-tree key.",

     function );

    return( -1 );

  }

  if( libfshfs_btree_node_get_record_by_index(

       node,

       record_index,

       &node_record,

       error ) == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve node record: %" PRIu16 ".",

     function,

     record_index );

    goto on_error;

  }

  if( node_record == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: missing B-tree node record: %" PRIu16 ".",

     function,

     record_index );

    goto on_error;

  }

  if( node_record->key_value == NULL )

  {

    if( libfshfs_extents_btree_key_initialize(

         &safe_node_key,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

       "%s: unable to create extents B-tree key.",

       function );

      goto on_error;

    }

    if( libfshfs_extents_btree_key_read_data(

         safe_node_key,

         node_record->data,

         node_record->data_size,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read extents B-tree key.",

       function );

      goto on_error;

    }

    node_record->key_value               = (intptr_t *) safe_node_key;

    node_record->key_value_free_function = (int (*)(intptr_t **, libcerror_error_t **)) &libfshfs_extents_btree_key_free;

  }

  *node_key = (libfshfs_extents_btree_key_t *) node_record->key_value;

  return( 1 );

on_error:

  if( safe_node_key != NULL )

  {

    libfshfs_extents_btree_key_free(

     &safe_node_key,

     NULL );

  }

  return( -1 );

}

/* Retrieves a sub node number for from the extents B-tree key

 * Returns 1 if successful or -1 on error

 */

int libfshfs_extents_btree_file_get_sub_node_number_from_key(

     libfshfs_extents_btree_key_t *node_key,

     uint32_t *sub_node_number,

     libcerror_error_t **error )

{

  static char *function = "libfshfs_extents_btree_file_get_sub_node_number_from_key";

  if( node_key == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid extents B-tree key.",

     function );

    return( -1 );

  }

  if( node_key->record_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid extents B-tree key - missing record data.",

     function );

    return( -1 );

  }

  if( node_key->record_data_size < 4 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid extents B-tree key - record data size value out of bounds.",

     function );

    return( -1 );

  }

  if( sub_node_number == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid sub node number.",

     function );

    return( -1 );

  }

  byte_stream_copy_to_uint32_big_endian(

   node_key->record_data,

   *sub_node_number );

  return( 1 );

}

/* Retrieves the extents for from the extents B-tree record data

 * Returns 1 if successful or -1 on error

 */

int libfshfs_extents_btree_file_get_extents_from_record_data(

     libfshfs_btree_file_t *btree_file,

     libfshfs_extents_btree_key_t *node_key,

     libcdata_array_t *extents,

     libcerror_error_t **error )

{

  libfshfs_extent_t *extent        = NULL;

  static char *function            = "libfshfs_extents_btree_file_get_extents_from_record_data";

  size_t extents_data_size         = 0;

  size_t record_data_offset        = 0;

  uint32_t extent_block_number     = 0;

  uint32_t extent_number_of_blocks = 0;

  int entry_index                  = 0;

  int extent_index                 = 0;

  int number_of_extents            = 0;

  if( btree_file == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid B-tree file.",

     function );

    return( -1 );

  }

  if( node_key == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid extents B-tree key.",

     function );

    return( -1 );

  }

  if( node_key->record_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid extents B-tree key - missing record data.",

     function );

    return( -1 );

  }

/* TODO add classic HFS support extents_data_size = 12; */

  extents_data_size = 64;

  if( node_key->record_data_size < extents_data_size )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid record data size value out of bounds.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: extents record data:\n",

     function );

    libcnotify_print_data(

     node_key->record_data,

     extents_data_size,

     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

  }

#endif

  if( extents_data_size == 64 )

  {

    number_of_extents = 8;

  }

  else

  {

    number_of_extents = 4;

  }

  for( extent_index = 0;

       extent_index < number_of_extents;

       extent_index++ )

  {

    if( extents_data_size == 64 )

    {

      byte_stream_copy_to_uint32_big_endian(

       &( node_key->record_data[ record_data_offset ] ),

       extent_block_number );

      record_data_offset += 4;

      byte_stream_copy_to_uint32_big_endian(

       &( node_key->record_data[ record_data_offset ] ),

       extent_number_of_blocks );

      record_data_offset += 4;

    }

    else

    {

      byte_stream_copy_to_uint16_big_endian(

       &( node_key->record_data[ record_data_offset ] ),

       extent_block_number );

      record_data_offset += 2;

      byte_stream_copy_to_uint16_big_endian(

       &( node_key->record_data[ record_data_offset ] ),

       extent_number_of_blocks );

      record_data_offset += 2;

    }

    if( ( extent_block_number == 0 )

     || ( extent_number_of_blocks == 0 ) )

    {

      break;

    }

    if( libfshfs_extent_initialize(

         &extent,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

       "%s: unable to create extent.",

       function );

      goto on_error;

    }

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: extent: %d block number\t: %" PRIu32 "\n",

       function,

       extent_index,

       extent_block_number );

      libcnotify_printf(

       "%s: extent: %d number of blocks\t: %" PRIu32 "\n",

       function,

       extent_index,

       extent_number_of_blocks );

    }

#endif /* defined( HAVE_DEBUG_OUTPUT ) */

    extent->block_number     = extent_block_number;

    extent->number_of_blocks = extent_number_of_blocks;

    if( libcdata_array_append_entry(

         extents,

         &entry_index,

         (intptr_t *) extent,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

       "%s: unable to append extent to array.",

       function );

      goto on_error;

    }

    extent = NULL;

  }

  return( 1 );

on_error:

  if( extent != NULL )

  {

    libfshfs_extent_free(

     &extent,

     NULL );

  }

  libcdata_array_empty(

   extents,

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

   NULL );

  return( -1 );

}

/* Retrieves the extents for a specific parent identifier from the extents B-tree leaf node

 * Returns 1 if successful or -1 on error

 */

int libfshfs_extents_btree_file_get_extents_from_leaf_node(

     libfshfs_btree_file_t *btree_file,

     libfshfs_btree_node_t *node,

     uint32_t identifier,

     uint8_t fork_type LIBFSHFS_ATTRIBUTE_UNUSED,

     libcdata_array_t *extents,

     libcerror_error_t **error )

{

  libfshfs_extent_t *extent              = NULL;

  libfshfs_extents_btree_key_t *node_key = NULL;

  static char *function                  = "libfshfs_extents_btree_file_get_extents_from_leaf_node";

  uint16_t record_index                  = 0;

  int is_leaf_node                       = 0;

  LIBFSHFS_UNREFERENCED_PARAMETER( fork_type )

  if( btree_file == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid B-tree file.",

     function );

    return( -1 );

  }

  if( node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid B-tree node.",

     function );

    return( -1 );

  }

  if( node->descriptor == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid B-tree node - missing descriptor.",

     function );

    return( -1 );

  }

  is_leaf_node = libfshfs_btree_node_is_leaf_node(

                  node,

                  error );

  if( is_leaf_node == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to determine if B-tree node is a leaf node.",

     function );

    goto on_error;

  }

  else if( is_leaf_node == 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: invalid node - not a leaf node.",

     function );

    goto on_error;

  }

  for( record_index = 0;

       record_index < node->descriptor->number_of_records;

       record_index++ )

  {

    if( libfshfs_extents_btree_file_get_key_from_node_by_index(

         node,

         record_index,

         &node_key,

         error ) == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve extents B-tree key: %" PRIu16 ".",

       function,

       record_index );

      goto on_error;

    }

    if( node_key == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

       "%s: missing extents B-tree key: %" PRIu16 ".",

       function,

       record_index );

      goto on_error;

    }

    if( node_key->identifier == identifier )

    {

      if( libfshfs_extents_btree_file_get_extents_from_record_data(

           btree_file,

           node_key,

           extents,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve extents from record data.",

         function );

        goto on_error;

      }

    }

    if( node_key->identifier > identifier )

    {

      break;

    }

  }

  return( 1 );

on_error:

  if( extent != NULL )

  {

    libfshfs_extent_free(

     &extent,

     NULL );

  }

  libcdata_array_empty(

   extents,

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

   NULL );

  return( -1 );

}

/* Retrieves the extents for a specific parent identifier from the extents B-tree branch node

 * Returns 1 if successful or -1 on error

 */

int libfshfs_extents_btree_file_get_extents_from_branch_node(

     libfshfs_btree_file_t *btree_file,

     libbfio_handle_t *file_io_handle,

     libfshfs_btree_node_cache_t *node_cache,

     libfshfs_btree_node_t *node,

     uint32_t identifier,

     uint8_t fork_type,

     libcdata_array_t *extents,

     int recursion_depth,

     libcerror_error_t **error )

{

  libfshfs_btree_node_t *sub_node             = NULL;

  libfshfs_extents_btree_key_t *last_node_key = NULL;

  libfshfs_extents_btree_key_t *node_key      = NULL;

  static char *function                       = "libfshfs_extents_btree_file_get_extents_from_node";

  uint32_t sub_node_number                    = 0;

  uint16_t record_index                       = 0;

  uint8_t node_type                           = 0;

  int is_branch_node                          = 0;

  int result                                  = 0;

  if( btree_file == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid B-tree file.",

     function );

    return( -1 );

  }

  if( node == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid B-tree node.",

     function );

    return( -1 );

  }

  if( node->descriptor == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid B-tree node - missing descriptor.",

     function );

    return( -1 );

  }

  if( ( recursion_depth < 0 )

   || ( recursion_depth > LIBFSHFS_MAXIMUM_BTREE_NODE_RECURSION_DEPTH ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid recursion depth value out of bounds.",

     function );

    return( -1 );

  }

  is_branch_node = libfshfs_btree_node_is_branch_node(

                    node,

                    error );

  if( is_branch_node == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to determine if B-tree node is a branch node.",

     function );

    goto on_error;

  }

  else if( is_branch_node == 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: invalid node - not a branch node.",

     function );

    goto on_error;

  }

  if( libfshfs_extents_btree_file_get_key_from_node_by_index(

       node,

       0,

       &last_node_key,

       error ) == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve extents B-tree key: 0.",

     function );

    goto on_error;

  }

  node_key = last_node_key;

  for( record_index = 1;

       record_index <= node->descriptor->number_of_records;

       record_index++ )

  {

    if( record_index < node->descriptor->number_of_records )

    {

      if( libfshfs_extents_btree_file_get_key_from_node_by_index(

           node,

           record_index,

           &node_key,

           error ) == -1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve extents B-tree key: %" PRIu16 ".",

         function,

         record_index );

        goto on_error;

      }

      if( node_key == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

         "%s: missing extents B-tree key: %" PRIu16 ".",

         function,

         record_index );

        goto on_error;

      }

    }

    if( ( record_index == node->descriptor->number_of_records )

     || ( node_key->identifier >= identifier ) )

    {

      if( libfshfs_extents_btree_file_get_sub_node_number_from_key(

           last_node_key,

           &sub_node_number,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve sub node number from extents B-Tree key.",

         function );

        goto on_error;

      }

#if defined( HAVE_DEBUG_OUTPUT )

      if( libcnotify_verbose != 0 )

      {

        libcnotify_printf(

         "%s: B-tree sub node number\t: %" PRIu32 "\n",

         function,

         sub_node_number );

        libcnotify_printf(

         "\n" );

      }

#endif

      if( libfshfs_btree_file_get_node_by_number(

           btree_file,

           file_io_handle,

           node_cache,

           recursion_depth,

           sub_node_number,

           &sub_node,

           error ) == -1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve B-tree sub node: %" PRIu32 ".",

         function,

         sub_node_number );

        goto on_error;

      }

      if( libfshfs_btree_node_get_node_type(

           sub_node,

           &node_type,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to determine if B-tree sub node: %" PRIu32 " type.",

         function,

         sub_node_number );

        goto on_error;

      }

      if( node_type == 0x00 )

      {

        result = libfshfs_extents_btree_file_get_extents_from_branch_node(

                  btree_file,

                  file_io_handle,

                  node_cache,

                  sub_node,

                  identifier,

                  fork_type,

                  extents,

                  recursion_depth + 1,

                  error );

      }

      else if( node_type == 0xff )

      {

        result = libfshfs_extents_btree_file_get_extents_from_leaf_node(

                  btree_file,

                  sub_node,

                  identifier,

                  fork_type,

                  extents,

                  error );

      }

      if( result != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_GET_FAILED,

         "%s: unable to retrieve extents from extents B-tree node: %" PRIu32 ".",

         function,

         sub_node_number );

        goto on_error;

      }

      if( node_key->identifier > identifier )

      {

        break;

      }

    }

    last_node_key = node_key;

  }

  return( 1 );

on_error:

  libcdata_array_empty(

   extents,

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

   NULL );

  return( -1 );

}

/* Retrieves the extents for a specific parent identifier from the extents B-tree file

 * Returns 1 if successful or -1 on error

 */

int libfshfs_extents_btree_file_get_extents(

     libfshfs_btree_file_t *btree_file,

     libbfio_handle_t *file_io_handle,

     libfshfs_btree_node_cache_t *node_cache,

     uint32_t identifier,

     uint8_t fork_type,

     libcdata_array_t *extents,

     libcerror_error_t **error )

{

  libfshfs_btree_node_t *root_node = NULL;

  static char *function            = "libfshfs_extents_btree_file_get_extents";

  uint8_t node_type                = 0;

  int result                       = 1;

  if( libfshfs_btree_file_get_root_node(

       btree_file,

       file_io_handle,

       node_cache,

       &root_node,

       error ) == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve B-tree root node.",

     function );

    goto on_error;

  }

  if( libfshfs_btree_node_get_node_type(

       root_node,

       &node_type,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to determine if B-tree root node type.",

     function );

    goto on_error;

  }

  if( node_type == 0x00 )

  {

    result = libfshfs_extents_btree_file_get_extents_from_branch_node(

              btree_file,

              file_io_handle,

              node_cache,

              root_node,

              identifier,

              fork_type,

              extents,

              1,

              error );

  }

  else if( node_type == 0xff )

  {

    result = libfshfs_extents_btree_file_get_extents_from_leaf_node(

              btree_file,

              root_node,

              identifier,

              fork_type,

              extents,

              error );

  }

  if( result != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve extents from extents B-tree root node.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  libcdata_array_empty(

   extents,

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

   NULL );

  return( -1 );

}