/*

 * Inode B+ tree functions

 *

 * Copyright (C) 2020-2024, 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 <memory.h>

#include <types.h>

#include "libfsxfs_btree_block.h"

#include "libfsxfs_btree_header.h"

#include "libfsxfs_definitions.h"

#include "libfsxfs_inode_btree.h"

#include "libfsxfs_inode_btree_record.h"

#include "libfsxfs_inode_information.h"

#include "libfsxfs_libbfio.h"

#include "libfsxfs_libcdata.h"

#include "libfsxfs_libcerror.h"

#include "libfsxfs_libcnotify.h"

/* Creates an inode B+ tree

 * Make sure the value inode_btree is referencing, is set to NULL

 * Returns 1 if successful or -1 on error

 */

int libfsxfs_inode_btree_initialize(

     libfsxfs_inode_btree_t **inode_btree,

     libcerror_error_t **error )

{

  static char *function = "libfsxfs_inode_btree_initialize";

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( *inode_btree != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid inode B+ tree value already set.",

     function );

    return( -1 );

  }

  *inode_btree = memory_allocate_structure(

                  libfsxfs_inode_btree_t );

  if( *inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create inode B+ tree.",

     function );

    goto on_error;

  }

  if( memory_set(

       *inode_btree,

       0,

       sizeof( libfsxfs_inode_btree_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear inode B+ tree.",

     function );

    memory_free(

     *inode_btree );

    *inode_btree = NULL;

    return( -1 );

  }

  if( libcdata_array_initialize(

       &( ( *inode_btree )->inode_information_array ),

       0,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create inode information array.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( *inode_btree != NULL )

  {

    memory_free(

     *inode_btree );

    *inode_btree = NULL;

  }

  return( -1 );

}

/* Frees an inode B+ tree

 * Returns 1 if successful or -1 on error

 */

int libfsxfs_inode_btree_free(

     libfsxfs_inode_btree_t **inode_btree,

     libcerror_error_t **error )

{

  static char *function = "libfsxfs_inode_btree_free";

  int result            = 1;

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( *inode_btree != NULL )

  {

    if( libcdata_array_free(

         &( ( *inode_btree )->inode_information_array ),

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

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free inode information array.",

       function );

      result = -1;

    }

    memory_free(

     *inode_btree );

    *inode_btree = NULL;

  }

  return( result );

}

/* Reads the inode information

 * Returns 1 if successful or -1 on error

 */

int libfsxfs_inode_btree_read_inode_information(

     libfsxfs_inode_btree_t *inode_btree,

     libfsxfs_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     off64_t file_offset,

     libcerror_error_t **error )

{

  libfsxfs_inode_information_t *inode_information = NULL;

  static char *function                           = "libfsxfs_file_system_read_inode_information";

  int entry_index                                 = 0;

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( libfsxfs_inode_information_initialize(

       &inode_information,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create inode information.",

     function );

    goto on_error;

  }

  if( libfsxfs_inode_information_read_file_io_handle(

       inode_information,

       io_handle,

       file_io_handle,

       file_offset,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read inode information at offset: %" PRIi64 " (0x%08" PRIx64 ").",

     function,

     file_offset,

     file_offset );

    goto on_error;

  }

  if( libcdata_array_append_entry(

       inode_btree->inode_information_array,

       &entry_index,

       (intptr_t *) inode_information,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

     "%s: unable to append inode information to array.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( inode_information != NULL )

  {

    libfsxfs_inode_information_free(

     &inode_information,

     NULL );

  }

  return( -1 );

}

/* Retrieves the inode from the inode B+ tree branch node

 * Returns 1 if successful or -1 on error

 */

int libfsxfs_inode_btree_get_inode_from_branch_node(

     libfsxfs_inode_btree_t *inode_btree,

     libfsxfs_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint64_t allocation_group_block_number,

     uint16_t number_of_records,

     const uint8_t *records_data,

     size_t records_data_size,

     uint64_t relative_inode_number,

     int recursion_depth,

     libcerror_error_t **error )

{

  static char *function              = "libfsxfs_inode_btree_get_inode_from_branch_node";

  size_t number_of_key_value_pairs   = 0;

  size_t records_data_offset         = 0;

  uint32_t relative_key_inode_number = 0;

  uint32_t relative_sub_block_number = 0;

  uint16_t record_index              = 0;

  int result                         = 0;

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( records_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid records data.",

     function );

    return( -1 );

  }

  if( ( records_data_size == 0 )

   || ( records_data_size > (size_t) SSIZE_MAX ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

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

     function );

    return( -1 );

  }

  if( ( recursion_depth < 0 )

   || ( recursion_depth > LIBFSXFS_MAXIMUM_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 );

  }

  number_of_key_value_pairs = records_data_size / 8;

  if( (size_t) number_of_records > number_of_key_value_pairs )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid number of records value out of bounds.",

     function );

    return( -1 );

  }

  for( record_index = 0;

       record_index < number_of_records;

       record_index++ )

  {

    byte_stream_copy_to_uint32_big_endian(

     &( records_data[ records_data_offset ] ),

     relative_key_inode_number );

    records_data_offset += 4;

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: inode number\t\t: %" PRIu32 "\n",

       function,

       relative_key_inode_number );

    }

#endif

    if( relative_inode_number < relative_key_inode_number )

    {

      break;

    }

  }

  if( ( record_index > 0 )

   && ( record_index <= number_of_records ) )

  {

    records_data_offset = ( number_of_key_value_pairs + record_index - 1 ) * 4;

    byte_stream_copy_to_uint32_big_endian(

     &( records_data[ records_data_offset ] ),

     relative_sub_block_number );

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: sub block number\t: %" PRIu32 "\n",

       function,

       relative_sub_block_number );

      libcnotify_printf(

       "\n" );

    }

#endif

    result = libfsxfs_inode_btree_get_inode_from_node(

              inode_btree,

              io_handle,

              file_io_handle,

              allocation_group_block_number,

              relative_sub_block_number,

              relative_inode_number,

              recursion_depth + 1,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve inode from node.",

       function );

      return( -1 );

    }

  }

#if defined( HAVE_DEBUG_OUTPUT )

  else if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "\n" );

  }

#endif

  return( result );

}

/* Retrieves the inode from the inode B+ tree leaf node

 * Returns 1 if successful or -1 on error

 */

int libfsxfs_inode_btree_get_inode_from_leaf_node(

     libfsxfs_inode_btree_t *inode_btree,

     uint16_t number_of_records,

     const uint8_t *records_data,

     size_t records_data_size,

     uint64_t inode_number,

     libcerror_error_t **error )

{

  libfsxfs_inode_btree_record_t *inode_btree_record = NULL;

  static char *function                             = "libfsxfs_inode_btree_get_inode_from_leaf_node";

  size_t records_data_offset                        = 0;

  uint16_t record_index                             = 0;

  int result                                        = 0;

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( records_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid records data.",

     function );

    return( -1 );

  }

  if( ( records_data_size == 0 )

   || ( records_data_size > (size_t) SSIZE_MAX ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

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

     function );

    return( -1 );

  }

  if( (size_t) number_of_records > ( records_data_size / 16 ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid number of records value out of bounds.",

     function );

    return( -1 );

  }

  for( record_index = 0;

       record_index < number_of_records;

       record_index++ )

  {

    if( libfsxfs_inode_btree_record_initialize(

         &inode_btree_record,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

       "%s: unable to create inode B+ tree record: %" PRIu16 ".",

       function,

       record_index );

      goto on_error;

    }

    if( libfsxfs_inode_btree_record_read_data(

         inode_btree_record,

         &( records_data[ records_data_offset ] ),

         16,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_IO,

       LIBCERROR_IO_ERROR_READ_FAILED,

       "%s: unable to read inode B+ tree record: %" PRIu16 ".",

       function,

       record_index );

      goto on_error;

    }

    records_data_offset += 16;

    if( ( inode_number >= inode_btree_record->inode_number )

     && ( inode_number < ( inode_btree_record->inode_number + 64 ) ) )

    {

/* TODO check bitmap */

      result = 1;

    }

/* TODO cache records in block */

    if( libfsxfs_inode_btree_record_free(

         &inode_btree_record,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free inode B+ tree record: %" PRIu16 ".",

       function,

       record_index );

      goto on_error;

    }

    if( result != 0 )

    {

      break;

    }

  }

  return( result );

on_error:

  if( inode_btree_record != NULL )

  {

    libfsxfs_inode_btree_record_free(

     &inode_btree_record,

     NULL );

  }

  return( -1 );

}

/* Retrieves the inode from the inode B+ tree node

 * Returns 1 if successful or -1 on error

 */

int libfsxfs_inode_btree_get_inode_from_node(

     libfsxfs_inode_btree_t *inode_btree,

     libfsxfs_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint64_t allocation_group_block_number,

     uint64_t relative_block_number,

     uint64_t relative_inode_number,

     int recursion_depth,

     libcerror_error_t **error )

{

  libfsxfs_btree_block_t *btree_block = NULL;

  static char *function               = "libfsxfs_inode_btree_get_inode_from_node";

  off64_t btree_block_offset          = 0;

  int compare_result                  = 0;

  int result                          = 0;

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

  if( io_handle->block_size == 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid IO handle - block size value out of bounds.",

     function );

    return( -1 );

  }

  if( allocation_group_block_number > (uint64_t) ( INT64_MAX / io_handle->block_size ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid allocation group block number value out of bounds.",

     function );

    return( -1 );

  }

  if( relative_block_number > ( (uint64_t) ( INT64_MAX / io_handle->block_size ) - allocation_group_block_number ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid relative block number value out of bounds.",

     function );

    return( -1 );

  }

  btree_block_offset = ( allocation_group_block_number + relative_block_number ) * io_handle->block_size;

  if( libfsxfs_btree_block_initialize(

       &btree_block,

       io_handle->block_size,

       4,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create B+ tree block.",

     function );

    goto on_error;

  }

  if( libfsxfs_btree_block_read_file_io_handle(

       btree_block,

       io_handle,

       file_io_handle,

       btree_block_offset,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read inode B+ tree block: %" PRIu32 " at offset: %" PRIi64 " (0x%08" PRIx64 ").",

     function,

     relative_block_number,

     btree_block_offset,

     btree_block_offset );

    goto on_error;

  }

  if( io_handle->format_version == 5 )

  {

    compare_result = memory_compare(

                      btree_block->header->signature,

                      "IAB3",

                      4 );

  }

  else

  {

    compare_result = memory_compare(

                      btree_block->header->signature,

                      "IABT",

                      4 );

  }

  if( compare_result != 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported block signature.",

     function );

    goto on_error;

  }

/* TODO

  if( btree_block->header->level > inode_btree->maximum_depth )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported B+ tree node level.",

     function );

    goto on_error;

  }

*/

  if( btree_block->header->level == 0 )

  {

    result = libfsxfs_inode_btree_get_inode_from_leaf_node(

              inode_btree,

              btree_block->header->number_of_records,

              btree_block->records_data,

              btree_block->records_data_size,

              relative_inode_number,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve inode from leaf node.",

       function );

      goto on_error;

    }

  }

  else

  {

    result = libfsxfs_inode_btree_get_inode_from_branch_node(

              inode_btree,

              io_handle,

              file_io_handle,

              allocation_group_block_number,

              btree_block->header->number_of_records,

              btree_block->records_data,

              btree_block->records_data_size,

              relative_inode_number,

              recursion_depth,

              error );

    if( result == -1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve inode from branch node.",

       function );

      goto on_error;

    }

  }

  if( libfsxfs_btree_block_free(

       &btree_block,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

     "%s: unable to free B+ tree block.",

     function );

    goto on_error;

  }

  return( result );

on_error:

  if( btree_block != NULL )

  {

    libfsxfs_btree_block_free(

     &btree_block,

     NULL );

  }

  return( -1 );

}

/* Retrieves a specific inode from the inode B+ tree

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

 */

int libfsxfs_inode_btree_get_inode_by_number(

     libfsxfs_inode_btree_t *inode_btree,

     libfsxfs_io_handle_t *io_handle,

     libbfio_handle_t *file_io_handle,

     uint64_t absolute_inode_number,

     off64_t *file_offset,

     libcerror_error_t **error )

{

  libfsxfs_inode_information_t *inode_information = NULL;

  static char *function                           = "libfsxfs_inode_btree_get_inode_by_number";

  uint64_t allocation_group_block_number          = 0;

  uint64_t relative_inode_number                  = 0;

  int allocation_group_index                      = 0;

  int result                                      = 0;

  if( inode_btree == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid inode B+ tree.",

     function );

    return( -1 );

  }

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

  if( io_handle->allocation_group_size == 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid IO handle - allocation group size value out of bounds.",

     function );

    return( -1 );

  }

  if( io_handle->block_size == 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid IO handle - block size value out of bounds.",

     function );

    return( -1 );

  }

  if( file_offset == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid file offset.",

     function );

    return( -1 );

  }

  allocation_group_index = (int) ( absolute_inode_number >> io_handle->number_of_relative_inode_number_bits );

  relative_inode_number  = absolute_inode_number & ( ( (uint64_t) 1 << io_handle->number_of_relative_inode_number_bits ) - 1 );

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: allocation group index\t: %d\n",

     function,

     allocation_group_index );

    libcnotify_printf(

     "%s: relative inode number\t\t: %" PRIu64 "\n",

     function,

     relative_inode_number );

    libcnotify_printf(

     "\n" );

  }

#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  if( libcdata_array_get_entry_by_index(

       inode_btree->inode_information_array,

       allocation_group_index,

       (intptr_t **) &inode_information,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve inode information: %d.",

     function,

     allocation_group_index );

    return( -1 );

  }

  allocation_group_block_number = (uint64_t) allocation_group_index * io_handle->allocation_group_size;

  if( inode_information == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: missing inode information.",

     function );

    return( -1 );

  }

  result = libfsxfs_inode_btree_get_inode_from_node(

            inode_btree,

            io_handle,

            file_io_handle,

            allocation_group_block_number,

            inode_information->inode_btree_root_block_number,

            relative_inode_number,

            0,

            error );

  if( result == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve inode: %" PRIu64 " from root node: %" PRIu32 ".",

     function,

     relative_inode_number,

     inode_information->inode_btree_root_block_number );

    return( -1 );

  }

  else if( result != 0 )

  {

    *file_offset = ( (off64_t) allocation_group_block_number * io_handle->block_size ) + ( (off64_t) relative_inode_number * io_handle->inode_size );

  }

  return( result );

}