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ewf_test_seek.c
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ewf_test_seek.c
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/*
* Expert Witness Compression Format (EWF) library seek offset testing program
*
* 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 <libcstring.h>
#include <liberror.h>
#if defined( HAVE_STDLIB_H ) || defined( WINAPI )
#include <stdlib.h>
#endif
#include <stdio.h>
#include "ewf_test_libewf.h"
/* Tests seeking an offset
* Returns 1 if successful, 0 if not or -1 on error
*/
int ewf_test_seek_offset(
libewf_handle_t *handle,
off64_t input_offset,
int input_whence,
off64_t expected_offset )
{
liberror_error_t *error = NULL;
const char *whence_string = NULL;
static char *function = "ewf_test_seek_offset";
off64_t result_offset = 0;
int result = 0;
if( input_whence == SEEK_CUR )
{
whence_string = "SEEK_CUR";
}
else if( input_whence == SEEK_END )
{
whence_string = "SEEK_END";
}
else if( input_whence == SEEK_SET )
{
whence_string = "SEEK_SET";
}
else
{
whence_string = "UNKNOWN";
}
fprintf(
stdout,
"Testing seek of offset: %" PRIi64 " and whence: %s\t",
input_offset,
whence_string );
result_offset = libewf_handle_seek_offset(
handle,
input_offset,
input_whence,
&error );
if( result_offset != expected_offset )
{
if( result_offset == -1 )
{
liberror_error_set(
&error,
LIBERROR_ERROR_DOMAIN_IO,
LIBERROR_IO_ERROR_SEEK_FAILED,
"%s: unable to seek offset: %" PRIi64 ".",
function,
input_offset );
result = -1;
}
}
else
{
if( result_offset == -1 )
{
liberror_error_free(
&error );
}
result = 1;
}
if( result != 0 )
{
fprintf(
stdout,
"(PASS)" );
}
else
{
fprintf(
stdout,
"(FAIL)" );
}
fprintf(
stdout,
"\n" );
if( result == -1 )
{
liberror_error_backtrace_fprint(
error,
stdout );
liberror_error_free(
&error );
}
else if( result == 0 )
{
fprintf(
stdout,
"%s: unexpected result offset: %" PRIi64 "\n",
function,
result_offset );
}
return( result );
}
/* The main program
*/
#if defined( LIBCSTRING_HAVE_WIDE_SYSTEM_CHARACTER )
int wmain( int argc, wchar_t * const argv[] )
#else
int main( int argc, char * const argv[] )
#endif
{
liberror_error_t *error = NULL;
libewf_handle_t *handle = NULL;
size64_t media_size = 0;
if( argc < 2 )
{
fprintf(
stderr,
"Missing filename(s).\n" );
return( EXIT_FAILURE );
}
/* Initialization
*/
if( libewf_handle_initialize(
&handle,
&error ) != 1 )
{
fprintf(
stderr,
"Unable to create handle.\n" );
goto on_error;
}
#if defined( LIBCSTRING_HAVE_WIDE_SYSTEM_CHARACTER )
if( libewf_handle_open_wide(
handle,
&( argv[ 1 ] ),
argc - 1,
LIBEWF_OPEN_READ,
&error ) != 1 )
#else
if( libewf_handle_open(
handle,
&( argv[ 1 ] ),
argc - 1,
LIBEWF_OPEN_READ,
&error ) != 1 )
#endif
{
fprintf(
stderr,
"Unable to open file(s).\n" );
goto on_error;
}
if( libewf_handle_get_media_size(
handle,
&media_size,
&error ) != 1 )
{
fprintf(
stderr,
"Unable to retrieve media size.\n" );
goto on_error;
}
if( media_size > (size64_t) INT64_MAX )
{
fprintf(
stderr,
"Media size exceeds maximum.\n" );
goto on_error;
}
/* Test: SEEK_SET offset: 0
* Expected result: 0
*/
if( ewf_test_seek_offset(
handle,
0,
SEEK_SET,
0 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_SET offset: <media_size>
* Expected result: <media_size>
*/
if( ewf_test_seek_offset(
handle,
(off64_t) media_size,
SEEK_SET,
(off64_t) media_size ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_SET offset: <media_size / 5>
* Expected result: <media_size / 5>
*/
if( ewf_test_seek_offset(
handle,
(off64_t) ( media_size / 5 ),
SEEK_SET,
(off64_t) ( media_size / 5 ) ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_SET offset: <media_size + 987>
* Expected result: <media_size + 987>
*/
if( ewf_test_seek_offset(
handle,
(off64_t) ( media_size + 987 ),
SEEK_SET,
(off64_t) ( media_size + 987 ) ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_SET offset: -987
* Expected result: -1
*/
if( ewf_test_seek_offset(
handle,
-987,
SEEK_SET,
-1 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_CUR offset: 0
* Expected result: <media_size + 987>
*/
if( ewf_test_seek_offset(
handle,
0,
SEEK_CUR,
(off64_t) ( media_size + 987 ) ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_CUR offset: <-1 * (media_size + 987)>
* Expected result: 0
*/
if( ewf_test_seek_offset(
handle,
-1 * (off64_t) ( media_size + 987 ),
SEEK_CUR,
0 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_CUR offset: <media_size / 3>
* Expected result: <media_size / 3>
*/
if( ewf_test_seek_offset(
handle,
(off64_t) ( media_size / 3 ),
SEEK_CUR,
(off64_t) ( media_size / 3 ) ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
if( media_size == 0 )
{
/* Test: SEEK_CUR offset: <-2 * (media_size / 3)>
* Expected result: 0
*/
if( ewf_test_seek_offset(
handle,
-2 * (off64_t) ( media_size / 3 ),
SEEK_CUR,
0 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
}
else
{
/* Test: SEEK_CUR offset: <-2 * (media_size / 3)>
* Expected result: -1
*/
if( ewf_test_seek_offset(
handle,
-2 * (off64_t) ( media_size / 3 ),
SEEK_CUR,
-1 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
}
/* Test: SEEK_END offset: 0
* Expected result: <media_size>
*/
if( ewf_test_seek_offset(
handle,
0,
SEEK_END,
(off64_t) media_size ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_END offset: <-1 * media_size>
* Expected result: 0
*/
if( ewf_test_seek_offset(
handle,
-1 * (off64_t) media_size,
SEEK_END,
0 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_END offset: <-1 * (media_size / 4)>
* Expected result: <media_size - (media_size / 4)>
*/
if( ewf_test_seek_offset(
handle,
-1 * (off64_t) ( media_size / 4 ),
SEEK_END,
(off64_t) media_size - (off64_t) ( media_size / 4 ) ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_END offset: 542
* Expected result: <media_size + 542>
*/
if( ewf_test_seek_offset(
handle,
542,
SEEK_END,
(off64_t) ( media_size + 542 ) ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: SEEK_END offset: <-1 * (media_size + 542)>
* Expected result: -1
*/
if( ewf_test_seek_offset(
handle,
-1 * (off64_t) ( media_size + 542 ),
SEEK_END,
-1 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Test: UNKNOWN (88) offset: 0
* Expected result: -1
*/
if( ewf_test_seek_offset(
handle,
0,
88,
-1 ) != 1 )
{
fprintf(
stderr,
"Unable to test seek offset.\n" );
goto on_error;
}
/* Clean up
*/
if( libewf_handle_close(
handle,
&error ) != 0 )
{
fprintf(
stderr,
"Unable to close file(s).\n" );
goto on_error;
}
if( libewf_handle_free(
&handle,
&error ) != 1 )
{
fprintf(
stderr,
"Unable to free handle.\n" );
goto on_error;
}
return( EXIT_SUCCESS );
on_error:
if( error != NULL )
{
libewf_error_backtrace_fprint(
error,
stderr );
libewf_error_free(
&error );
}
if( handle != NULL )
{
libewf_handle_close(
handle,
NULL );
libewf_handle_free(
&handle,
NULL );
}
return( EXIT_FAILURE );
}

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