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libsmdev_sector_range.c
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libsmdev_sector_range.c
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/*
* Sector range functions
*
* Copyright (c) 2010-2012, Joachim Metz <jbmetz@users.sourceforge.net>
*
* Refer to AUTHORS for acknowledgements.
*
* This software 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 software 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 software. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <memory.h>
#include <types.h>
#include <liberror.h>
#include "libsmdev_sector_range.h"
/* Initialize a session value
* Make sure the value is pointing to is set to NULL
* Returns 1 if successful or -1 on error
*/
int libsmdev_sector_range_initialize(
libsmdev_sector_range_t **sector_range,
liberror_error_t **error )
{
static char *function = "libsmdev_sector_range_initialize";
if( sector_range == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid session value.",
function );
return( -1 );
}
if( *sector_range != NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
"%s: invalid sector range value already set.",
function );
return( -1 );
}
*sector_range = memory_allocate_structure(
libsmdev_sector_range_t );
if( *sector_range == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_INSUFFICIENT,
"%s: unable to create session value.",
function );
goto on_error;
}
if( memory_set(
*sector_range,
0,
sizeof( libsmdev_sector_range_t ) ) == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_SET_FAILED,
"%s: unable to clear session value.",
function );
goto on_error;
}
return( 1 );
on_error:
if( *sector_range != NULL )
{
memory_free(
*sector_range );
*sector_range = NULL;
}
return( -1 );
}
/* Frees a session value
* Returns 1 if successful or -1 on error
*/
int libsmdev_sector_range_free(
libsmdev_sector_range_t **sector_range,
liberror_error_t **error )
{
static char *function = "libsmdev_sector_range_free";
if( sector_range == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid session value.",
function );
return( -1 );
}
if( *sector_range != NULL )
{
memory_free(
*sector_range );
*sector_range = NULL;
}
return( 1 );
}
/* Retrieves a session value
* Returns 1 if successful or -1 on error
*/
int libsmdev_sector_range_get(
libsmdev_sector_range_t *sector_range,
uint64_t *start_sector,
uint64_t *number_of_sectors,
liberror_error_t **error )
{
static char *function = "libsmdev_sector_range_get";
if( sector_range == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid session value.",
function );
return( -1 );
}
if( start_sector == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid start sector.",
function );
return( -1 );
}
if( number_of_sectors == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid number of sectors.",
function );
return( -1 );
}
*start_sector = sector_range->start_sector;
*number_of_sectors = sector_range->number_of_sectors;
return( 1 );
}
/* Sets a session value
* Returns 1 if successful or -1 on error
*/
int libsmdev_sector_range_set(
libsmdev_sector_range_t *sector_range,
uint64_t start_sector,
uint64_t number_of_sectors,
liberror_error_t **error )
{
static char *function = "libsmdev_sector_range_set";
if( sector_range == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid session value.",
function );
return( -1 );
}
if( start_sector > (uint64_t) INT64_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid start sector value exceeds maximum.",
function );
return( -1 );
}
if( number_of_sectors > (uint64_t) INT64_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid number of sectors value exceeds maximum.",
function );
return( -1 );
}
sector_range->start_sector = start_sector;
sector_range->end_sector = start_sector + number_of_sectors;
sector_range->number_of_sectors = number_of_sectors;
return( 1 );
}

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