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/*
* Compare functions
*
* Copyright (c) 2008-2009, Joachim Metz <forensics@hoffmannbv.nl>,
* Hoffmann Investigations.
*
* 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 <types.h>
#include <liberror.h>
#include "libuna_compare.h"
#include "libuna_unicode_character.h"
#include "libuna_types.h"
/* Compares an UTF-8 string with an UTF-16 string
* Returns 1 if the strings are equal, 0 if not or -1 on error
*/
int libuna_compare_utf8_with_utf16(
const libuna_utf8_character_t *utf8_string,
size_t utf8_string_size,
const libuna_utf16_character_t *utf16_string,
size_t utf16_string_size,
liberror_error_t **error )
{
static char *function = "libuna_compare_utf8_with_utf16";
size_t utf8_string_iterator = 0;
size_t utf16_string_iterator = 0;
libuna_unicode_character_t utf8_unicode_character = 0;
libuna_unicode_character_t utf16_unicode_character = 0;
if( utf8_string == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid UTF-8 string.",
function );
return( -1 );
}
if( utf8_string_size > (size_t) SSIZE_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid UTF-8 string size value exceeds maximum.",
function );
return( -1 );
}
if( utf16_string == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid UTF-16 string.",
function );
return( -1 );
}
if( utf16_string_size > (size_t) SSIZE_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid UTF-16 string size value exceeds maximum.",
function );
return( -1 );
}
while( ( utf8_string_iterator < utf8_string_size )
&& ( utf16_string_iterator < utf16_string_size ) )
{
/* Convert the UTF-8 character bytes into a Unicode character
*/
if( libuna_unicode_character_copy_from_utf8(
&utf8_unicode_character,
utf8_string,
utf8_string_size,
&utf8_string_iterator,
error ) != 1 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_CONVERSION,
LIBERROR_CONVERSION_ERROR_OUTPUT_FAILED,
"%s: unable to copy Unicode character from UTF-8.",
function );
return( -1 );
}
/* Convert the UTF-16 character bytes into a Unicode character
*/
if( libuna_unicode_character_copy_from_utf16(
&utf16_unicode_character,
utf16_string,
utf16_string_size,
&utf16_string_iterator,
error ) != 1 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_CONVERSION,
LIBERROR_CONVERSION_ERROR_INPUT_FAILED,
"%s: unable to copy Unicode character from UTF-16.",
function );
return( -1 );
}
if( utf8_unicode_character != utf16_unicode_character )
{
break;
}
}
/* Check if both strings were entirely processed
*/
if( ( utf8_string_iterator != utf8_string_size )
|| ( utf16_string_iterator != utf16_string_size ) )
{
return( 0 );
}
return( 1 );
}
/* Compares an UTF-8 string with an UTF-32 string
* Returns 1 if the strings are equal, 0 if not or -1 on error
*/
int libuna_compare_utf8_with_utf32(
const libuna_utf8_character_t *utf8_string,
size_t utf8_string_size,
const libuna_utf32_character_t *utf32_string,
size_t utf32_string_size,
liberror_error_t **error )
{
static char *function = "libuna_compare_utf8_with_utf32";
size_t utf8_string_iterator = 0;
size_t utf32_string_iterator = 0;
libuna_unicode_character_t utf8_unicode_character = 0;
libuna_unicode_character_t utf32_unicode_character = 0;
if( utf8_string == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid UTF-8 string.",
function );
return( -1 );
}
if( utf8_string_size > (size_t) SSIZE_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid UTF-8 string size value exceeds maximum.",
function );
return( -1 );
}
if( utf32_string == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid UTF-32 string.",
function );
return( -1 );
}
if( utf32_string_size > (size_t) SSIZE_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid UTF-32 string size value exceeds maximum.",
function );
return( -1 );
}
while( ( utf8_string_iterator < utf8_string_size )
&& ( utf32_string_iterator < utf32_string_size ) )
{
/* Convert the UTF-8 character bytes into a Unicode character
*/
if( libuna_unicode_character_copy_from_utf8(
&utf8_unicode_character,
utf8_string,
utf8_string_size,
&utf8_string_iterator,
error ) != 1 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_CONVERSION,
LIBERROR_CONVERSION_ERROR_OUTPUT_FAILED,
"%s: unable to copy Unicode character from UTF-8.",
function );
return( -1 );
}
/* Convert the UTF-32 character bytes into a Unicode character
*/
if( libuna_unicode_character_copy_from_utf32(
&utf32_unicode_character,
utf32_string,
utf32_string_size,
&utf32_string_iterator,
error ) != 1 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_CONVERSION,
LIBERROR_CONVERSION_ERROR_INPUT_FAILED,
"%s: unable to copy Unicode character from UTF-32.",
function );
return( -1 );
}
if( utf8_unicode_character != utf32_unicode_character )
{
break;
}
}
/* Check if both strings were entirely processed
*/
if( ( utf8_string_iterator != utf8_string_size )
|| ( utf32_string_iterator != utf32_string_size ) )
{
return( 0 );
}
return( 1 );
}
/* Compares an UTF-16 string with an UTF-32 string
* Returns 1 if the strings are equal, 0 if not or -1 on error
*/
int libuna_compare_utf16_with_utf32(
const libuna_utf16_character_t *utf16_string,
size_t utf16_string_size,
const libuna_utf32_character_t *utf32_string,
size_t utf32_string_size,
liberror_error_t **error )
{
static char *function = "libuna_compare_utf16_with_utf32";
size_t utf16_string_iterator = 0;
size_t utf32_string_iterator = 0;
libuna_unicode_character_t utf16_unicode_character = 0;
libuna_unicode_character_t utf32_unicode_character = 0;
if( utf16_string == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid UTF-16 string.",
function );
return( -1 );
}
if( utf16_string_size > (size_t) SSIZE_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid UTF-16 string size value exceeds maximum.",
function );
return( -1 );
}
if( utf32_string == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid UTF-32 string.",
function );
return( -1 );
}
if( utf32_string_size > (size_t) SSIZE_MAX )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM,
"%s: invalid UTF-32 string size value exceeds maximum.",
function );
return( -1 );
}
while( ( utf16_string_iterator < utf16_string_size )
&& ( utf32_string_iterator < utf32_string_size ) )
{
/* Convert the UTF-16 character bytes into a Unicode character
*/
if( libuna_unicode_character_copy_from_utf16(
&utf16_unicode_character,
utf16_string,
utf16_string_size,
&utf16_string_iterator,
error ) != 1 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_CONVERSION,
LIBERROR_CONVERSION_ERROR_OUTPUT_FAILED,
"%s: unable to copy Unicode character from UTF-16.",
function );
return( -1 );
}
/* Convert the UTF-32 character bytes into a Unicode character
*/
if( libuna_unicode_character_copy_from_utf32(
&utf32_unicode_character,
utf32_string,
utf32_string_size,
&utf32_string_iterator,
error ) != 1 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_CONVERSION,
LIBERROR_CONVERSION_ERROR_INPUT_FAILED,
"%s: unable to copy Unicode character from UTF-32.",
function );
return( -1 );
}
if( utf16_unicode_character != utf32_unicode_character )
{
break;
}
}
/* Check if both strings were entirely processed
*/
if( ( utf16_string_iterator != utf16_string_size )
|| ( utf32_string_iterator != utf32_string_size ) )
{
return( 0 );
}
return( 1 );
}
|
