/*

 * Data block stream 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 <types.h>

#include "libregf_libbfio.h"

#include "libregf_libcerror.h"

#include "libregf_unused.h"

/* Reads the segment data into the buffer

 * Callback function for the value item data stream

 * Returns the number of bytes read or -1 on error

 */

ssize_t libregf_data_block_stream_read_segment_data(

         intptr_t *data_handle LIBREGF_ATTRIBUTE_UNUSED,

         libbfio_handle_t *file_io_handle,

         int segment_index LIBREGF_ATTRIBUTE_UNUSED,

         int segment_file_index LIBREGF_ATTRIBUTE_UNUSED,

         uint8_t *segment_data,

         size_t segment_data_size,

         uint32_t segment_flags LIBREGF_ATTRIBUTE_UNUSED,

         uint8_t read_flags LIBREGF_ATTRIBUTE_UNUSED,

         libcerror_error_t **error )

{

  static char *function = "libregf_data_block_stream_read_segment_data";

  ssize_t read_count    = 0;

  LIBREGF_UNREFERENCED_PARAMETER( data_handle )

  LIBREGF_UNREFERENCED_PARAMETER( segment_index )

  LIBREGF_UNREFERENCED_PARAMETER( segment_file_index )

  LIBREGF_UNREFERENCED_PARAMETER( segment_flags )

  LIBREGF_UNREFERENCED_PARAMETER( read_flags )

  read_count = libbfio_handle_read_buffer(

          file_io_handle,

          segment_data,

          segment_data_size,

          error );

  if( read_count != (ssize_t) segment_data_size )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read segment data.",

     function );

    return( -1 );

  }

  return( read_count );

}

/* Seeks a certain segment offset

 * Callback function for the value item data stream

 * Returns the offset or -1 on error

 */

off64_t libregf_data_block_stream_seek_segment_offset(

         intptr_t *data_handle LIBREGF_ATTRIBUTE_UNUSED,

         libbfio_handle_t *file_io_handle,

         int segment_index LIBREGF_ATTRIBUTE_UNUSED,

         int segment_file_index LIBREGF_ATTRIBUTE_UNUSED,

         off64_t segment_offset,

         libcerror_error_t **error )

{

  static char *function = "libregf_data_block_stream_seek_segment_offset";

  LIBREGF_UNREFERENCED_PARAMETER( data_handle )

  LIBREGF_UNREFERENCED_PARAMETER( segment_index )

  LIBREGF_UNREFERENCED_PARAMETER( segment_file_index )

  segment_offset = libbfio_handle_seek_offset(

                    file_io_handle,

                    segment_offset,

                    SEEK_SET,

                    error );

  if( segment_offset == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to seek segment offset.",

     function );

    return( -1 );

  }

  return( segment_offset );

}