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libewf_media_values.c
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libewf_media_values.c
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/*
* Media values functions
*
* Copyright (c) 2006-2012, 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 <liberror.h>
#include "libewf_media_values.h"
#include "ewf_definitions.h"
/* Initialize the media values
* Returns 1 if successful or -1 on error
*/
int libewf_media_values_initialize(
libewf_media_values_t **media_values,
liberror_error_t **error )
{
static char *function = "libewf_media_values_initialize";
if( media_values == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid media values.",
function );
return( -1 );
}
if( *media_values != NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
"%s: invalid media values value already set.",
function );
return( -1 );
}
*media_values = memory_allocate_structure(
libewf_media_values_t );
if( *media_values == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_INSUFFICIENT,
"%s: unable to create media values.",
function );
goto on_error;
}
if( memory_set(
*media_values,
0,
sizeof( libewf_media_values_t ) ) == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_SET_FAILED,
"%s: unable to clear media values.",
function );
goto on_error;
}
( *media_values )->chunk_size = EWF_MINIMUM_CHUNK_SIZE;
( *media_values )->sectors_per_chunk = 64;
( *media_values )->bytes_per_sector = 512;
( *media_values )->media_flags = 0x01;
return( 1 );
on_error:
if( *media_values != NULL )
{
memory_free(
*media_values );
*media_values = NULL;
}
return( -1 );
}
/* Frees the media values including elements
* Returns 1 if successful or -1 on error
*/
int libewf_media_values_free(
libewf_media_values_t **media_values,
liberror_error_t **error )
{
static char *function = "libewf_media_values_free";
if( media_values == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid media values.",
function );
return( -1 );
}
if( *media_values != NULL )
{
memory_free(
*media_values );
*media_values = NULL;
}
return( 1 );
}
/* Clones the media values
* Returns 1 if successful or -1 on error
*/
int libewf_media_values_clone(
libewf_media_values_t **destination_media_values,
libewf_media_values_t *source_media_values,
liberror_error_t **error )
{
static char *function = "libewf_media_values_clone";
if( destination_media_values == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid destination media values.",
function );
return( -1 );
}
if( *destination_media_values != NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
"%s: invalid destination media values already set.",
function );
return( -1 );
}
if( source_media_values == NULL )
{
*destination_media_values = NULL;
return( 1 );
}
*destination_media_values = memory_allocate_structure(
libewf_media_values_t );
if( *destination_media_values == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_INSUFFICIENT,
"%s: unable to create destination media values.",
function );
goto on_error;
}
if( memory_copy(
*destination_media_values,
source_media_values,
sizeof( libewf_media_values_t ) ) == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_COPY_FAILED,
"%s: unable to copy source to destination media values.",
function );
goto on_error;
}
return( 1 );
on_error:
if( *destination_media_values != NULL )
{
memory_free(
*destination_media_values );
*destination_media_values = NULL;
}
return( -1 );
}

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