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/*
* Data block stream functions
*
* Copyright (C) 2009-2020, 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 );
}
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