/*

 * Dynamic disk header functions

 *

 * Copyright (C) 2012-2025, 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 "libvhdi_debug.h"

#include "libvhdi_definitions.h"

#include "libvhdi_dynamic_disk_header.h"

#include "libvhdi_libbfio.h"

#include "libvhdi_libcerror.h"

#include "libvhdi_libcnotify.h"

#include "libvhdi_libfguid.h"

#include "libvhdi_libuna.h"

#include "vhdi_dynamic_disk_header.h"

/* Creates dynamic disk header

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

 * Returns 1 if successful or -1 on error

 */

int libvhdi_dynamic_disk_header_initialize(

     libvhdi_dynamic_disk_header_t **dynamic_disk_header,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_initialize";

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( *dynamic_disk_header != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid dynamic disk header value already set.",

     function );

    return( -1 );

  }

  *dynamic_disk_header = memory_allocate_structure(

                          libvhdi_dynamic_disk_header_t );

  if( *dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create dynamic disk header.",

     function );

    goto on_error;

  }

  if( memory_set(

       *dynamic_disk_header,

       0,

       sizeof( libvhdi_dynamic_disk_header_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear dynamic disk header.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( *dynamic_disk_header != NULL )

  {

    memory_free(

     *dynamic_disk_header );

    *dynamic_disk_header = NULL;

  }

  return( -1 );

}

/* Frees dynamic disk header

 * Returns 1 if successful or -1 on error

 */

int libvhdi_dynamic_disk_header_free(

     libvhdi_dynamic_disk_header_t **dynamic_disk_header,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_free";

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( *dynamic_disk_header != NULL )

  {

    if( ( *dynamic_disk_header )->parent_filename != NULL )

    {

      memory_free(

       ( *dynamic_disk_header )->parent_filename );

    }

    memory_free(

     *dynamic_disk_header );

    *dynamic_disk_header = NULL;

  }

  return( 1 );

}

/* Reads the dynamic disk header data

 * Returns 1 if successful or -1 on error

 */

int libvhdi_dynamic_disk_header_read_data(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     const uint8_t *data,

     size_t data_size,

     libcerror_error_t **error )

{

  static char *function            = "libvhdi_dynamic_disk_header_read_data";

  size_t parent_filename_size      = 0;

  uint64_t safe_block_table_offset = 0;

  uint64_t safe_next_offset        = 0;

#if defined( HAVE_DEBUG_OUTPUT )

  uint32_t value_32bit             = 0;

#endif

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( dynamic_disk_header->parent_filename != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid dynamic disk header - parent filename already set.",

     function );

    return( -1 );

  }

  if( data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data.",

     function );

    return( -1 );

  }

  if( ( data_size < sizeof( vhdi_dynamic_disk_header_t ) )

   || ( data_size > (size_t) SSIZE_MAX ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

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

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: dynamic disk header data:\n",

     function );

    libcnotify_print_data(

     data,

     sizeof( vhdi_dynamic_disk_header_t ),

     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

  }

#endif

  if( memory_compare(

       ( (vhdi_dynamic_disk_header_t *) data )->signature,

       "cxsparse",

       8 ) != 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported signature.",

     function );

    goto on_error;

  }

  byte_stream_copy_to_uint32_big_endian(

   ( (vhdi_dynamic_disk_header_t *) data )->format_version,

   dynamic_disk_header->format_version );

  byte_stream_copy_to_uint64_big_endian(

   ( (vhdi_dynamic_disk_header_t *) data )->block_table_offset,

   safe_block_table_offset );

  dynamic_disk_header->block_table_offset = (off64_t) safe_block_table_offset;

  byte_stream_copy_to_uint64_big_endian(

   ( (vhdi_dynamic_disk_header_t *) data )->next_offset,

   safe_next_offset );

  dynamic_disk_header->next_offset = (off64_t) safe_next_offset;

  byte_stream_copy_to_uint32_big_endian(

   ( (vhdi_dynamic_disk_header_t *) data )->block_size,

   dynamic_disk_header->block_size );

  byte_stream_copy_to_uint32_big_endian(

   ( (vhdi_dynamic_disk_header_t *) data )->number_of_blocks,

   dynamic_disk_header->number_of_blocks );

  if( memory_copy(

       dynamic_disk_header->parent_identifier,

       ( (vhdi_dynamic_disk_header_t *) data )->parent_identifier,

       16 ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_COPY_FAILED,

     "%s: unable to copy parent identifier.",

     function );

    goto on_error;

  }

  parent_filename_size = 0;

  while( parent_filename_size < ( 512 - 1 ) )

  {

    if( ( ( (vhdi_dynamic_disk_header_t *) data )->parent_filename[ parent_filename_size ] == 0 )

     && ( ( (vhdi_dynamic_disk_header_t *) data )->parent_filename[ parent_filename_size + 1 ] == 0 ) )

    {

      break;

    }

    parent_filename_size += 2;

  }

  if( parent_filename_size > 0 )

  {

    if( parent_filename_size > (size_t) ( MEMORY_MAXIMUM_ALLOCATION_SIZE - 2 ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

       LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,

       "%s: invalid parent filename size value exceeds maximum allocation size.",

       function );

      goto on_error;

    }

    parent_filename_size += 2;

    dynamic_disk_header->parent_filename = (uint8_t *) memory_allocate(

                                                        sizeof( uint8_t ) * parent_filename_size );

    if( dynamic_disk_header->parent_filename == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_MEMORY,

       LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

       "%s: unable to create parent filename.",

       function );

      goto on_error;

    }

    if( memory_copy(

         dynamic_disk_header->parent_filename,

         ( (vhdi_dynamic_disk_header_t *) data )->parent_filename,

         parent_filename_size ) == NULL )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_MEMORY,

       LIBCERROR_MEMORY_ERROR_COPY_FAILED,

       "%s: unable to copy parent filename.",

       function );

      goto on_error;

    }

  }

  dynamic_disk_header->parent_filename_size = parent_filename_size;

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: signature\t\t\t: %c%c%c%c%c%c%c%c\n",

     function,

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 0 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 1 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 2 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 3 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 4 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 5 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 6 ],

     ( (vhdi_dynamic_disk_header_t *) data )->signature[ 7 ] );

    libcnotify_printf(

     "%s: format version\t\t\t: %" PRIu16 ".%" PRIu16 "\n",

     function,

     dynamic_disk_header->format_version >> 16,

     dynamic_disk_header->format_version & 0x0000ffffUL );

    libcnotify_printf(

     "%s: block table offset\t\t: 0x%08" PRIx64 "\n",

     function,

     safe_block_table_offset );

    libcnotify_printf(

     "%s: next offset\t\t\t: 0x%08" PRIx64 "\n",

     function,

     safe_next_offset );

    libcnotify_printf(

     "%s: block size\t\t\t: %" PRIu64 "\n",

     function,

     dynamic_disk_header->block_size );

    libcnotify_printf(

     "%s: number of blocks\t\t\t: %" PRIu64 "\n",

     function,

     dynamic_disk_header->number_of_blocks );

    byte_stream_copy_to_uint32_big_endian(

     ( (vhdi_dynamic_disk_header_t *) data )->checksum,

     value_32bit );

    libcnotify_printf(

     "%s: checksum\t\t\t\t: 0x%08" PRIx32 "\n",

     function,

     value_32bit );

    if( libvhdi_debug_print_guid_value(

         function,

         "parent identifier\t\t",

         ( (vhdi_dynamic_disk_header_t *) data )->parent_identifier,

         16,

         LIBFGUID_ENDIAN_BIG,

         LIBFGUID_STRING_FORMAT_FLAG_USE_LOWER_CASE,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,

       "%s: unable to print GUID value.",

       function );

      goto on_error;

    }

    byte_stream_copy_to_uint32_big_endian(

     ( (vhdi_dynamic_disk_header_t *) data )->parent_modification_time,

     value_32bit );

    libcnotify_printf(

     "%s: parent modification time\t\t: 0x%08" PRIx32 "\n",

     function,

     value_32bit );

    libcnotify_printf(

     "%s: parent filename data:\n",

     function );

    libcnotify_print_data(

     ( (vhdi_dynamic_disk_header_t *) data )->parent_filename,

     512,

     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

    if( dynamic_disk_header->parent_filename_size > 0 )

    {

      if( libvhdi_debug_print_utf16_string_value(

           function,

           "parent filename\t\t\t",

           dynamic_disk_header->parent_filename,

           dynamic_disk_header->parent_filename_size,

           LIBUNA_ENDIAN_BIG,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,

         "%s: unable to print UTF-16 string value.",

         function );

        goto on_error;

      }

    }

    libcnotify_printf(

     "%s: parent locator entries data:\n",

     function );

    libcnotify_print_data(

     ( (vhdi_dynamic_disk_header_t *) data )->parent_locator_entries,

     192,

     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

    libcnotify_printf(

     "%s: unknown2:\n",

     function );

    libcnotify_print_data(

     ( (vhdi_dynamic_disk_header_t *) data )->unknown2,

     256,

     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

  }

#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  if( dynamic_disk_header->format_version != 0x00010000UL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported format version: 0x%08" PRIx32 ".",

     function,

     dynamic_disk_header->format_version );

    goto on_error;

  }

  if( dynamic_disk_header->block_size == 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

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

     function );

    goto on_error;

  }

/* TODO check if block size is power of 2 */

  if( ( dynamic_disk_header->block_size % 512 ) != 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported block size: %" PRIu32 ".",

     function,

     dynamic_disk_header->block_size );

    goto on_error;

  }

  return( 1 );

on_error:

  if( dynamic_disk_header->parent_filename != NULL )

  {

    memory_free(

     dynamic_disk_header->parent_filename );

    dynamic_disk_header->parent_filename = NULL;

  }

  dynamic_disk_header->parent_filename_size = 0;

  return( -1 );

}

/* Reads the dynamic disk header

 * Returns 1 if successful or -1 on error

 */

int libvhdi_dynamic_disk_header_read_file_io_handle(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     libbfio_handle_t *file_io_handle,

     off64_t file_offset,

     libcerror_error_t **error )

{

  uint8_t dynamic_disk_header_data[ sizeof( vhdi_dynamic_disk_header_t ) ];

  static char *function = "libvhdi_dynamic_disk_header_read_file_io_handle";

  ssize_t read_count    = 0;

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: reading dynamic disk header at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",

     function,

     file_offset,

     file_offset );

  }

#endif

  read_count = libbfio_handle_read_buffer_at_offset(

                file_io_handle,

                dynamic_disk_header_data,

                sizeof( vhdi_dynamic_disk_header_t ),

                file_offset,

                error );

  if( read_count != (ssize_t) sizeof( vhdi_dynamic_disk_header_t ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read dynamic disk header data at offset: %" PRIi64 " (0x%08" PRIx64 ").",

     function,

     file_offset,

     file_offset );

    return( -1 );

  }

  if( libvhdi_dynamic_disk_header_read_data(

       dynamic_disk_header,

       dynamic_disk_header_data,

       sizeof( vhdi_dynamic_disk_header_t ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read dynamic disk header.",

     function );

    return( -1 );

  }

  return( 1 );

}

/* Retrieves the parent identifier

 * Returns 1 if successful or -1 on error

 */

int libvhdi_dynamic_disk_header_get_parent_identifier(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     uint8_t *guid_data,

     size_t guid_data_size,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_get_parent_identifier";

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( guid_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid GUID data.",

     function );

    return( -1 );

  }

  if( ( guid_data_size < 16 )

   || ( guid_data_size > (size_t) SSIZE_MAX ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

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

     function );

    return( -1 );

  }

  if( memory_copy(

       guid_data,

       dynamic_disk_header->parent_identifier,

       16 ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_COPY_FAILED,

     "%s: unable to copy parent identifier.",

     function );

    return( -1 );

  }

  return( 1 );

}

/* Retrieves the size of the UTF-8 encoded parent filename

 * The returned size includes the end of string character

 * Returns 1 if successful, 0 if not available or -1 on error

 */

int libvhdi_dynamic_disk_header_get_utf8_parent_filename_size(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     size_t *utf8_string_size,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_get_utf8_parent_filename_size";

  int result            = 0;

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( ( dynamic_disk_header->parent_filename != NULL )

   && ( dynamic_disk_header->parent_filename_size > 0 ) )

  {

    result = libuna_utf8_string_size_from_utf16_stream(

              dynamic_disk_header->parent_filename,

              dynamic_disk_header->parent_filename_size,

              LIBUNA_ENDIAN_BIG,

              utf8_string_size,

              error );

    if( result != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve UTF-8 string size.",

       function );

      return( -1 );

    }

  }

  return( result );

}

/* Retrieves the UTF-8 encoded parent filename

 * The size should include the end of string character

 * Returns 1 if successful, 0 if not available or -1 on error

 */

int libvhdi_dynamic_disk_header_get_utf8_parent_filename(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     uint8_t *utf8_string,

     size_t utf8_string_size,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_get_utf8_parent_filename";

  int result            = 0;

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( ( dynamic_disk_header->parent_filename != NULL )

   && ( dynamic_disk_header->parent_filename_size > 0 ) )

  {

    result = libuna_utf8_string_copy_from_utf16_stream(

              utf8_string,

              utf8_string_size,

              dynamic_disk_header->parent_filename,

              dynamic_disk_header->parent_filename_size,

              LIBUNA_ENDIAN_BIG,

              error );

    if( result != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_COPY_FAILED,

       "%s: unable to copy parent filename to UTF-8 string.",

       function );

      return( -1 );

    }

  }

  return( result );

}

/* Retrieves the size of the UTF-16 encoded parent filename

 * The returned size includes the end of string character

 * Returns 1 if successful, 0 if not available or -1 on error

 */

int libvhdi_dynamic_disk_header_get_utf16_parent_filename_size(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     size_t *utf16_string_size,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_get_utf16_parent_filename_size";

  int result            = 0;

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( ( dynamic_disk_header->parent_filename != NULL )

   && ( dynamic_disk_header->parent_filename_size > 0 ) )

  {

    result = libuna_utf16_string_size_from_utf16_stream(

              dynamic_disk_header->parent_filename,

              dynamic_disk_header->parent_filename_size,

              LIBUNA_ENDIAN_BIG,

              utf16_string_size,

              error );

    if( result != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve UTF-16 string size.",

       function );

      return( -1 );

    }

  }

  return( result );

}

/* Retrieves the UTF-16 encoded parent filename

 * The size should include the end of string character

 * Returns 1 if successful, 0 if not available or -1 on error

 */

int libvhdi_dynamic_disk_header_get_utf16_parent_filename(

     libvhdi_dynamic_disk_header_t *dynamic_disk_header,

     uint16_t *utf16_string,

     size_t utf16_string_size,

     libcerror_error_t **error )

{

  static char *function = "libvhdi_dynamic_disk_header_get_utf16_parent_filename";

  int result            = 0;

  if( dynamic_disk_header == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid dynamic disk header.",

     function );

    return( -1 );

  }

  if( ( dynamic_disk_header->parent_filename != NULL )

   && ( dynamic_disk_header->parent_filename_size > 0 ) )

  {

    result = libuna_utf16_string_copy_from_utf16_stream(

              utf16_string,

              utf16_string_size,

              dynamic_disk_header->parent_filename,

              dynamic_disk_header->parent_filename_size,

              LIBUNA_ENDIAN_BIG,

              error );

    if( result != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_COPY_FAILED,

       "%s: unable to copy parent filename to UTF-16 string.",

       function );

      return( -1 );

    }

  }

  return( result );

}