[squirrelmail.git] / functions / i18n.php

<?php

/**
 * i18n.php
 *
 * Copyright (c) 1999-2003 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * This file contains variuos functions that are needed to do
 * internationalization of SquirrelMail.
 *
 * Internally the output character set is used. Other characters are
 * encoded using Unicode entities according to HTML 4.0.
 *
 * $Id$
 * @package squirrelmail
 */

/** Everything uses global.php... */
require_once(SM_PATH . 'functions/global.php');

/**
 * Converts string from given charset to charset, that can be displayed by user translation.
 *
 * Function by default returns html encoded strings, if translation uses different encoding.
 * If Japanese translation is used - function returns string converted to euc-jp
 * If iconv or recode functions are enabled and translation uses utf-8 - function returns utf-8 encoded string.
 * If $charset is not supported - function returns unconverted string.
 * 
 * sanitizing of html tags is also done by this function.
 *
 * @param string $charset
 * @param string $string Text to be decoded
 * @return string decoded string
 */
function charset_decode ($charset, $string) {
    global $languages, $squirrelmail_language, $default_charset;
    global $use_php_recode, $use_php_iconv, $agresive_decoding;

    if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
        function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
        $string = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $string);
    }

    $charset = strtolower($charset);

    set_my_charset();

    // Variables that allow to use functions without function_exist() calls
    if (! isset($use_php_recode) || $use_php_recode=="" ) {
	     $use_php_recode=false; }
    if (! isset($use_php_iconv) || $use_php_iconv=="" ) {
         $use_php_iconv=false; }

    // Don't do conversion if charset is the same.
    if ( $charset == strtolower($default_charset) )
          return htmlspecialchars($string);

    // catch iso-8859-8-i thing
    if ( $charset == "iso-8859-8-i" )
              $charset = "iso-8859-8";

    /*
     * Recode converts html special characters automatically if you use 
     * 'charset..html' decoding. There is no documented way to put -d option 
     * into php recode function call.
     */
    if ( $use_php_recode ) {
      if ( $default_charset == "utf-8" ) {
	// other charsets can be converted to utf-8 without loss.
	// and output string is smaller
	$string = recode_string($charset . "..utf-8",$string);
	return htmlspecialchars($string);
      } else {
	$string = recode_string($charset . "..html",$string);
	// recode does not convert single quote, htmlspecialchars does.
	$string = str_replace("'", '&#039;', $string);
	return $string;
      }
    }

    // iconv functions does not have html target and can be used only with utf-8
    if ( $use_php_iconv && $default_charset=='utf-8') {
      $string = iconv($charset,$default_charset,$string);
      return htmlspecialchars($string);
    }

    // If we don't use recode and iconv, we'll do it old way.

    /* All HTML special characters are 7 bit and can be replaced first */
    
    $string = htmlspecialchars ($string);

    /* controls cpu and memory intensive decoding cycles */
    if (! isset($agresive_decoding) || $agresive_decoding=="" ) {
         $agresive_decoding=false; }

    if (ereg('iso-8859-([[:digit:]]+)', $charset, $res)) {
        if ($res[1] == '1') {
	    include_once(SM_PATH . 'functions/decode/iso8859-1.php');
            $ret = charset_decode_iso8859_1 ($string);
        } else if ($res[1] == '2') {
	    include_once(SM_PATH . 'functions/decode/iso8859-2.php');
            $ret = charset_decode_iso8859_2 ($string);
        } else if ($res[1] == '3') {
	    include_once(SM_PATH . 'functions/decode/iso8859-3.php');
            $ret = charset_decode_iso8859_3 ($string);
        } else if ($res[1] == '4') {
	    include_once(SM_PATH . 'functions/decode/iso8859-4.php');
            $ret = charset_decode_iso8859_4 ($string);
        } else if ($res[1] == '5') {
	    include_once(SM_PATH . 'functions/decode/iso8859-5.php');
            $ret = charset_decode_iso8859_5 ($string);
        } else if ($res[1] == '6') {
	    include_once(SM_PATH . 'functions/decode/iso8859-6.php');
            $ret = charset_decode_iso8859_6 ($string);
        } else if ($res[1] == '7') {
	    include_once(SM_PATH . 'functions/decode/iso8859-7.php');
            $ret = charset_decode_iso8859_7 ($string);
        } else if ($res[1] == '8') {
	    include_once(SM_PATH . 'functions/decode/iso8859-8.php');
            $ret = charset_decode_iso8859_8 ($string);
        } else if ($res[1] == '9') {
	    include_once(SM_PATH . 'functions/decode/iso8859-9.php');
            $ret = charset_decode_iso8859_9 ($string);
        } else if ($res[1] == '10') {
	    include_once(SM_PATH . 'functions/decode/iso8859-10.php');
            $ret = charset_decode_iso8859_10 ($string);
        } else if ($res[1] == '11') {
	    include_once(SM_PATH . 'functions/decode/iso8859-11.php');
            $ret = charset_decode_iso8859_11 ($string);
        } else if ($res[1] == '13') {
	    include_once(SM_PATH . 'functions/decode/iso8859-13.php');
            $ret = charset_decode_iso8859_13 ($string);
        } else if ($res[1] == '14') {
	    include_once(SM_PATH . 'functions/decode/iso8859-14.php');
            $ret = charset_decode_iso8859_14 ($string);
        } else if ($res[1] == '15') {
	    include_once(SM_PATH . 'functions/decode/iso8859-15.php');
            $ret = charset_decode_iso8859_15 ($string);
        } else if ($res[1] == '16') {
	    include_once(SM_PATH . 'functions/decode/iso8859-16.php');
            $ret = charset_decode_iso8859_16 ($string);
        } else {
            $ret = charset_decode_iso_8859_default ($string);
        }
    } else if ($charset == 'ns_4551-1') {
        $ret = charset_decode_ns_4551_1 ($string);
    } else if ($charset == 'koi8-r') {
        include_once(SM_PATH . 'functions/decode/koi8-r.php');
        $ret = charset_decode_koi8r ($string);
    } else if ($charset == 'koi8-u') {
        include_once(SM_PATH . 'functions/decode/koi8-u.php');
        $ret = charset_decode_koi8u ($string);
    } else if ($charset == 'windows-1250') {
        include_once(SM_PATH . 'functions/decode/cp1250.php');
        $ret = charset_decode_cp1250 ($string);
    } else if ($charset == 'windows-1251') {
        include_once(SM_PATH . 'functions/decode/cp1251.php');
        $ret = charset_decode_cp1251 ($string);
    } else if ($charset == 'windows-1252') {
        include_once(SM_PATH . 'functions/decode/cp1252.php');
        $ret = charset_decode_cp1252 ($string);
    } else if ($charset == 'windows-1253') {
        include_once(SM_PATH . 'functions/decode/cp1253.php');
	$ret = charset_decode_cp1253 ($string);
    } else if ($charset == 'windows-1254') {
        include_once(SM_PATH . 'functions/decode/cp1254.php');
	$ret = charset_decode_cp1254 ($string);
    } else if ($charset == 'windows-1255') {
        include_once(SM_PATH . 'functions/decode/cp1255.php');
	$ret = charset_decode_cp1255 ($string);
    } else if ($charset == 'windows-1256') {
        include_once(SM_PATH . 'functions/decode/cp1256.php');
	$ret = charset_decode_cp1256 ($string);
    } else if ($charset == 'windows-1257') {
        include_once(SM_PATH . 'functions/decode/cp1257.php');
        $ret = charset_decode_cp1257 ($string);
    } else if ($charset == 'windows-1258') {
        include_once(SM_PATH . 'functions/decode/cp1258.php');
        $ret = charset_decode_cp1258 ($string);
    } else if ($charset == 'x-mac-roman') {
        include_once(SM_PATH . 'functions/decode/cp10000.php');
        $ret = charset_decode_cp10000 ($string);
    } else if ($charset == 'x-mac-greek') {
        include_once(SM_PATH . 'functions/decode/cp10006.php');
        $ret = charset_decode_cp10006 ($string);
    } else if ($charset == 'x-mac-cyrillic') {
        include_once(SM_PATH . 'functions/decode/cp10007.php');
        $ret = charset_decode_cp10007 ($string);
    } else if ($charset == 'x-mac-ukrainian') {
        include_once(SM_PATH . 'functions/decode/cp10017.php');
        $ret = charset_decode_cp10017 ($string);
    } else if ($charset == 'x-mac-centraleurroman') {
        include_once(SM_PATH . 'functions/decode/cp10029.php');
        $ret = charset_decode_cp10029 ($string);
    } else if ($charset == 'x-mac-icelandic') {
        include_once(SM_PATH . 'functions/decode/cp10079.php');
        $ret = charset_decode_cp10079 ($string);
    } else if ($charset == 'x-mac-turkish') {
        include_once(SM_PATH . 'functions/decode/cp10081.php');
        $ret = charset_decode_cp10081 ($string);
    } else if ($charset == 'ibm855') {
        include_once(SM_PATH . 'functions/decode/cp855.php');
        $ret = charset_decode_cp855 ($string);
    } else if ($charset == 'ibm866') {
        include_once(SM_PATH . 'functions/decode/cp866.php');
        $ret = charset_decode_cp866 ($string);
    } else if ($charset == 'iso-ir-111') {
        include_once(SM_PATH . 'functions/decode/iso-ir-111.php');
        $ret = charset_decode_iso_ir_111 ($string);
    } else if ($charset == 'tis-620') {
        include_once(SM_PATH . 'functions/decode/tis620.php');
        $ret = charset_decode_tis620 ($string);
    } else if ($charset == 'big5' and $agresive_decoding ) {
        include_once(SM_PATH . 'functions/decode/big5.php');
        $ret = charset_decode_big5 ($string);
    } else if ($charset == 'gb2312' and $agresive_decoding ) {
        include_once(SM_PATH . 'functions/decode/gb2312.php');
        $ret = charset_decode_gb2312 ($string);
    } else if ($charset == 'utf-8' && $squirrelmail_language != 'ja_JP') {
        include_once(SM_PATH . 'functions/decode/utf-8.php');
	$ret = charset_decode_utf8 ($string);
    } else {
        $ret = $string;
    }
    return( $ret );
}


/**
 * 8bit cleanup functions.
 *
 * Replaces all 8 bit characters from ISO-8859 character sets with '?'
 * Legacy function used for unsupported ISO-8859 charsets
 * 
 * @param string $string string that has to be cleaned
 * @return string cleaned string
 */
function charset_decode_iso_8859_default ($string) {
    return (strtr($string, "\240\241\242\243\244\245\246\247".
                    "\250\251\252\253\254\255\256\257".
                    "\260\261\262\263\264\265\266\267".
                    "\270\271\272\273\274\275\276\277".
                    "\300\301\302\303\304\305\306\307".
                    "\310\311\312\313\314\315\316\317".
                    "\320\321\322\323\324\325\326\327".
                    "\330\331\332\333\334\335\336\337".
                    "\340\341\342\343\344\345\346\347".
                    "\350\351\352\353\354\355\356\357".
                    "\360\361\362\363\364\365\366\367".
                    "\370\371\372\373\374\375\376\377",
                    "????????????????????????????????????????".
                    "????????????????????????????????????????".
                    "????????????????????????????????????????".
                    "????????"));

}

/**
 * ns_4551_1 decoding function
 *
 * This is the same as ISO-646-NO and is used by some
 * Microsoft programs when sending Norwegian characters
 * 
 * @param string $string
 * @return string 
 */
function charset_decode_ns_4551_1 ($string) {
    /*
     * These characters are:
     * Latin capital letter AE
     * Latin capital letter O with stroke
     * Latin capital letter A with ring above
     * and the same as small letters
     */
Commit	Line	Data
59177427	1	<?php
1fd97780	2
35586184	3	/**
	4	* i18n.php
	5	*
76911253	6	* Copyright (c) 1999-2003 The SquirrelMail Project Team
35586184	7	* Licensed under the GNU GPL. For full terms see the file COPYING.
	8	*
	9	* This file contains variuos functions that are needed to do
	10	* internationalization of SquirrelMail.
	11	*
	12	* Internally the output character set is used. Other characters are
	13	* encoded using Unicode entities according to HTML 4.0.
	14	*
	15	* $Id$
d6c32258	16	* @package squirrelmail
35586184	17	*/
35586184	18
d6c32258	19	/** Everything uses global.php... */
961ca3d8	20	require_once(SM_PATH . 'functions/global.php');
961ca3d8	21
d6c32258	22	/**
51468260	23	* Converts string from given charset to charset, that can be displayed by user translation.
	24	*
	25	* Function by default returns html encoded strings, if translation uses different encoding.
	26	* If Japanese translation is used - function returns string converted to euc-jp
	27	* If iconv or recode functions are enabled and translation uses utf-8 - function returns utf-8 encoded string.
	28	* If $charset is not supported - function returns unconverted string.
d6c32258	29	*
51468260	30	* sanitizing of html tags is also done by this function.
51468260	31	*
d6c32258	32	* @param string $charset
d6c32258	33	* @param string $string Text to be decoded
51468260	34	* @return string decoded string
d6c32258	35	*/
a2a7852b	36	function charset_decode ($charset, $string) {
3ec81e63	37	global $languages, $squirrelmail_language, $default_charset;
edf2c0ba	38	global $use_php_recode, $use_php_iconv, $agresive_decoding;
a2a7852b	39
3714db45	40	if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
3714db45	41	function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
6fbd125b	42	$string = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $string);
6fbd125b	43	}
b05c8961	44
3ec81e63	45	$charset = strtolower($charset);
	46
	47	set_my_charset();
	48
	49	// Variables that allow to use functions without function_exist() calls
edf2c0ba	50	if (! isset($use_php_recode) \|\| $use_php_recode=="" ) {
	51	$use_php_recode=false; }
	52	if (! isset($use_php_iconv) \|\| $use_php_iconv=="" ) {
	53	$use_php_iconv=false; }
3ec81e63	54
	55	// Don't do conversion if charset is the same.
	56	if ( $charset == strtolower($default_charset) )
	57	return htmlspecialchars($string);
	58
	59	// catch iso-8859-8-i thing
	60	if ( $charset == "iso-8859-8-i" )
	61	$charset = "iso-8859-8";
	62
	63	/*
	64	* Recode converts html special characters automatically if you use
	65	* 'charset..html' decoding. There is no documented way to put -d option
	66	* into php recode function call.
	67	*/
	68	if ( $use_php_recode ) {
	69	if ( $default_charset == "utf-8" ) {
	70	// other charsets can be converted to utf-8 without loss.
	71	// and output string is smaller
	72	$string = recode_string($charset . "..utf-8",$string);
	73	return htmlspecialchars($string);
	74	} else {
	75	$string = recode_string($charset . "..html",$string);
	76	// recode does not convert single quote, htmlspecialchars does.
	77	$string = str_replace("'", ''', $string);
	78	return $string;
	79	}
	80	}
	81
	82	// iconv functions does not have html target and can be used only with utf-8
	83	if ( $use_php_iconv && $default_charset=='utf-8') {
	84	$string = iconv($charset,$default_charset,$string);
	85	return htmlspecialchars($string);
	86	}
	87
	88	// If we don't use recode and iconv, we'll do it old way.
	89
a2a7852b	90	/* All HTML special characters are 7 bit and can be replaced first */
cef054e4	91
098ea084	92	$string = htmlspecialchars ($string);
a2a7852b	93
5dd23dac	94	/* controls cpu and memory intensive decoding cycles */
edf2c0ba	95	if (! isset($agresive_decoding) \|\| $agresive_decoding=="" ) {
edf2c0ba	96	$agresive_decoding=false; }
5dd23dac	97
a2a7852b	98	if (ereg('iso-8859-([[:digit:]]+)', $charset, $res)) {
a2a7852b	99	if ($res[1] == '1') {
5dd23dac	100	include_once(SM_PATH . 'functions/decode/iso8859-1.php');
5dd23dac	101	$ret = charset_decode_iso8859_1 ($string);
a2a7852b	102	} else if ($res[1] == '2') {
5dd23dac	103	include_once(SM_PATH . 'functions/decode/iso8859-2.php');
5dd23dac	104	$ret = charset_decode_iso8859_2 ($string);
3a66bed2	105	} else if ($res[1] == '3') {
	106	include_once(SM_PATH . 'functions/decode/iso8859-3.php');
	107	$ret = charset_decode_iso8859_3 ($string);
9be313d5	108	} else if ($res[1] == '4') {
3a66bed2	109	include_once(SM_PATH . 'functions/decode/iso8859-4.php');
3a66bed2	110	$ret = charset_decode_iso8859_4 ($string);
94965562	111	} else if ($res[1] == '5') {
3a66bed2	112	include_once(SM_PATH . 'functions/decode/iso8859-5.php');
3a66bed2	113	$ret = charset_decode_iso8859_5 ($string);
ef82d2d5	114	} else if ($res[1] == '6') {
5dd23dac	115	include_once(SM_PATH . 'functions/decode/iso8859-6.php');
5dd23dac	116	$ret = charset_decode_iso8859_6 ($string);
a2a7852b	117	} else if ($res[1] == '7') {
5dd23dac	118	include_once(SM_PATH . 'functions/decode/iso8859-7.php');
5dd23dac	119	$ret = charset_decode_iso8859_7 ($string);
3a66bed2	120	} else if ($res[1] == '8') {
	121	include_once(SM_PATH . 'functions/decode/iso8859-8.php');
	122	$ret = charset_decode_iso8859_8 ($string);
3ab35042	123	} else if ($res[1] == '9') {
5dd23dac	124	include_once(SM_PATH . 'functions/decode/iso8859-9.php');
5dd23dac	125	$ret = charset_decode_iso8859_9 ($string);
3a66bed2	126	} else if ($res[1] == '10') {
	127	include_once(SM_PATH . 'functions/decode/iso8859-10.php');
	128	$ret = charset_decode_iso8859_10 ($string);
	129	} else if ($res[1] == '11') {
	130	include_once(SM_PATH . 'functions/decode/iso8859-11.php');
	131	$ret = charset_decode_iso8859_11 ($string);
9be313d5	132	} else if ($res[1] == '13') {
3a66bed2	133	include_once(SM_PATH . 'functions/decode/iso8859-13.php');
	134	$ret = charset_decode_iso8859_13 ($string);
	135	} else if ($res[1] == '14') {
	136	include_once(SM_PATH . 'functions/decode/iso8859-14.php');
	137	$ret = charset_decode_iso8859_14 ($string);
a2a7852b	138	} else if ($res[1] == '15') {
5dd23dac	139	include_once(SM_PATH . 'functions/decode/iso8859-15.php');
5dd23dac	140	$ret = charset_decode_iso8859_15 ($string);
3a66bed2	141	} else if ($res[1] == '16') {
	142	include_once(SM_PATH . 'functions/decode/iso8859-16.php');
	143	$ret = charset_decode_iso8859_16 ($string);
a2a7852b	144	} else {
	145	$ret = charset_decode_iso_8859_default ($string);
	146	}
	147	} else if ($charset == 'ns_4551-1') {
	148	$ret = charset_decode_ns_4551_1 ($string);
	149	} else if ($charset == 'koi8-r') {
5dd23dac	150	include_once(SM_PATH . 'functions/decode/koi8-r.php');
a2a7852b	151	$ret = charset_decode_koi8r ($string);
1c0e847f	152	} else if ($charset == 'koi8-u') {
5dd23dac	153	include_once(SM_PATH . 'functions/decode/koi8-u.php');
1c0e847f	154	$ret = charset_decode_koi8u ($string);
5dd23dac	155	} else if ($charset == 'windows-1250') {
	156	include_once(SM_PATH . 'functions/decode/cp1250.php');
	157	$ret = charset_decode_cp1250 ($string);
a2a7852b	158	} else if ($charset == 'windows-1251') {
5dd23dac	159	include_once(SM_PATH . 'functions/decode/cp1251.php');
	160	$ret = charset_decode_cp1251 ($string);
	161	} else if ($charset == 'windows-1252') {
	162	include_once(SM_PATH . 'functions/decode/cp1252.php');
	163	$ret = charset_decode_cp1252 ($string);
3ab35042	164	} else if ($charset == 'windows-1253') {
5dd23dac	165	include_once(SM_PATH . 'functions/decode/cp1253.php');
5dd23dac	166	$ret = charset_decode_cp1253 ($string);
3ab35042	167	} else if ($charset == 'windows-1254') {
5dd23dac	168	include_once(SM_PATH . 'functions/decode/cp1254.php');
5dd23dac	169	$ret = charset_decode_cp1254 ($string);
c48a8ca7	170	} else if ($charset == 'windows-1255') {
5dd23dac	171	include_once(SM_PATH . 'functions/decode/cp1255.php');
5dd23dac	172	$ret = charset_decode_cp1255 ($string);
c48a8ca7	173	} else if ($charset == 'windows-1256') {
5dd23dac	174	include_once(SM_PATH . 'functions/decode/cp1256.php');
5dd23dac	175	$ret = charset_decode_cp1256 ($string);
c37a12f8	176	} else if ($charset == 'windows-1257') {
3a66bed2	177	include_once(SM_PATH . 'functions/decode/cp1257.php');
3a66bed2	178	$ret = charset_decode_cp1257 ($string);
5dd23dac	179	} else if ($charset == 'windows-1258') {
	180	include_once(SM_PATH . 'functions/decode/cp1258.php');
	181	$ret = charset_decode_cp1258 ($string);
e9a71964	182	} else if ($charset == 'x-mac-roman') {
	183	include_once(SM_PATH . 'functions/decode/cp10000.php');
	184	$ret = charset_decode_cp10000 ($string);
	185	} else if ($charset == 'x-mac-greek') {
	186	include_once(SM_PATH . 'functions/decode/cp10006.php');
	187	$ret = charset_decode_cp10006 ($string);
	188	} else if ($charset == 'x-mac-cyrillic') {
	189	include_once(SM_PATH . 'functions/decode/cp10007.php');
	190	$ret = charset_decode_cp10007 ($string);
	191	} else if ($charset == 'x-mac-ukrainian') {
	192	include_once(SM_PATH . 'functions/decode/cp10017.php');
	193	$ret = charset_decode_cp10017 ($string);
	194	} else if ($charset == 'x-mac-centraleurroman') {
	195	include_once(SM_PATH . 'functions/decode/cp10029.php');
	196	$ret = charset_decode_cp10029 ($string);
	197	} else if ($charset == 'x-mac-icelandic') {
	198	include_once(SM_PATH . 'functions/decode/cp10079.php');
	199	$ret = charset_decode_cp10079 ($string);
	200	} else if ($charset == 'x-mac-turkish') {
	201	include_once(SM_PATH . 'functions/decode/cp10081.php');
	202	$ret = charset_decode_cp10081 ($string);
	203	} else if ($charset == 'ibm855') {
	204	include_once(SM_PATH . 'functions/decode/cp855.php');
	205	$ret = charset_decode_cp855 ($string);
	206	} else if ($charset == 'ibm866') {
	207	include_once(SM_PATH . 'functions/decode/cp866.php');
	208	$ret = charset_decode_cp866 ($string);
0e4337e7	209	} else if ($charset == 'iso-ir-111') {
	210	include_once(SM_PATH . 'functions/decode/iso-ir-111.php');
	211	$ret = charset_decode_iso_ir_111 ($string);
7af26ef8	212	} else if ($charset == 'tis-620') {
	213	include_once(SM_PATH . 'functions/decode/tis620.php');
	214	$ret = charset_decode_tis620 ($string);
5dd23dac	215	} else if ($charset == 'big5' and $agresive_decoding ) {
	216	include_once(SM_PATH . 'functions/decode/big5.php');
	217	$ret = charset_decode_big5 ($string);
	218	} else if ($charset == 'gb2312' and $agresive_decoding ) {
	219	include_once(SM_PATH . 'functions/decode/gb2312.php');
	220	$ret = charset_decode_gb2312 ($string);
96d985e5	221	} else if ($charset == 'utf-8' && $squirrelmail_language != 'ja_JP') {
5dd23dac	222	include_once(SM_PATH . 'functions/decode/utf-8.php');
3ab35042	223	$ret = charset_decode_utf8 ($string);
a2a7852b	224	} else {
	225	$ret = $string;
	226	}
	227	return( $ret );
	228	}
	229
a2a7852b	230
51468260	231	/**
	232	* 8bit cleanup functions.
	233	*
	234	* Replaces all 8 bit characters from ISO-8859 character sets with '?'
	235	* Legacy function used for unsupported ISO-8859 charsets
	236	*
	237	* @param string $string string that has to be cleaned
	238	* @return string cleaned string
	239	*/
a2a7852b	240	function charset_decode_iso_8859_default ($string) {
a2a7852b	241	return (strtr($string, "\240\241\242\243\244\245\246\247".
1fd97780	242	"\250\251\252\253\254\255\256\257".
	243	"\260\261\262\263\264\265\266\267".
	244	"\270\271\272\273\274\275\276\277".
	245	"\300\301\302\303\304\305\306\307".
	246	"\310\311\312\313\314\315\316\317".
	247	"\320\321\322\323\324\325\326\327".
	248	"\330\331\332\333\334\335\336\337".
	249	"\340\341\342\343\344\345\346\347".
	250	"\350\351\352\353\354\355\356\357".
	251	"\360\361\362\363\364\365\366\367".
a2a7852b	252	"\370\371\372\373\374\375\376\377",
1fd97780	253	"????????????????????????????????????????".
	254	"????????????????????????????????????????".
	255	"????????????????????????????????????????".
	256	"????????"));
a2a7852b	257
	258	}
	259
51468260	260	/**
	261	* ns_4551_1 decoding function
	262	*
a2a7852b	263	* This is the same as ISO-646-NO and is used by some
a2a7852b	264	* Microsoft programs when sending Norwegian characters
51468260	265	*
	266	* @param string $string
	267	* @return string
a2a7852b	268	*/
	269	function charset_decode_ns_4551_1 ($string) {
	270	/*
	271	* These characters are:
	272	* Latin capital letter AE
	273	* Latin capital letter O with stroke
	274	* Latin capital letter A with ring above
	275	* and the same as small letters
	276	*/
	277