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libsystem_support.c
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libsystem_support.c
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/*
* Support functions
*
* Copyright (c) 2006-2009, 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 <narrow_string.h>
#include <memory.h>
#include <wide_string.h>
#include <types.h>
#include <errno.h>
#if defined( HAVE_LOCALE_H )
#include <locale.h>
#endif
#if defined( HAVE_LANGINFO_H )
#include <langinfo.h>
#endif
#include "libsystem_libuna.h"
#include "libsystem_notify.h"
#include "libsystem_string.h"
#include "libsystem_support.h"
/* Initializes the system values
* Returns 1 if successful or -1 on error
*/
int libsystem_initialize(
liberror_error_t **error )
{
#if !defined( LIBSYSTEM_HAVE_WIDE_CHARACTER )
static char *function = "libsystem_initialize";
char *locale = NULL;
char *charset = NULL;
size_t charset_length = 0;
#if !defined( HAVE_LANGINFO_CODESET )
size_t locale_length = 0;
#endif
/* Determine the supported locales
*/
locale = setlocale(
LC_CTYPE,
"" );
if( locale == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to determine locale.",
function );
return( -1 );
}
#if defined( HAVE_LANGINFO_CODESET )
charset = nl_langinfo(
CODESET );
if( charset == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to determine character set.",
function );
return( -1 );
}
charset_length = narrow_string_length(
charset );
#else
locale_length = narrow_string_length(
locale );
charset = narrow_string_search(
locale,
'.',
locale_length + 1 );
if( charset == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to determine character set.",
function );
return( -1 );
}
charset++;
charset_length = locale_length - (size_t) ( charset - locale );
#endif
#if defined( HAVE_DEBUG_OUTPUT )
libsystem_notify_verbose_printf(
"%s: charset: %s\n",
function,
charset );
#endif
/* Determine codepage
*/
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_ASCII;
if( charset_length == 5 )
{
if( narrow_string_compare(
"UTF-8",
charset,
5 ) == 0 )
{
libsystem_string_is_unicode = 1;
}
}
else if( charset_length >= 4 )
{
if( narrow_string_compare(
"1250",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1250;
}
else if( narrow_string_compare(
"1251",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1251;
}
else if( narrow_string_compare(
"1252",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1252;
}
else if( narrow_string_compare(
"1253",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1253;
}
else if( narrow_string_compare(
"1254",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1254;
}
else if( narrow_string_compare(
"1255",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1255;
}
else if( narrow_string_compare(
"1256",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1256;
}
else if( narrow_string_compare(
"1257",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1257;
}
else if( narrow_string_compare(
"1258",
charset,
4 ) == 0 )
{
libsystem_string_byte_stream_codepage = LIBUNA_CODEPAGE_WINDOWS_1258;
}
else if( narrow_string_compare(
"utf8",
charset,
4 ) == 0 )
{
libsystem_string_is_unicode = 1;
}
}
#endif
return( 1 );
}

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