functions/i18n.php

   1 <?php
   2
   3 /**
   4  * i18n.php
   5  *
   6  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   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  * $Id$
  16  */
  17
  18 require_once(SM_PATH . 'functions/global.php');
  19
  20 /* Decodes a string to the internal encoding from the given charset */
  21 function charset_decode ($charset, $string) {
  22     global $languages, $squirrelmail_language;
  23
  24     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
  25         function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
  26         $string = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $string);
  27     }
  28
  29     /* All HTML special characters are 7 bit and can be replaced first */
  30
  31     $string = htmlspecialchars ($string);
  32
  33     $charset = strtolower($charset);
  34
  35     set_my_charset() ;
  36
  37     /* controls cpu and memory intensive decoding cycles */
  38     $agresive_decoding = false;
  39
  40     if (ereg('iso-8859-([[:digit:]]+)', $charset, $res)) {
  41         if ($res[1] == '1') {
  42             include_once(SM_PATH . 'functions/decode/iso8859-1.php');
  43             $ret = charset_decode_iso8859_1 ($string);
  44         } else if ($res[1] == '2') {
  45             include_once(SM_PATH . 'functions/decode/iso8859-2.php');
  46             $ret = charset_decode_iso8859_2 ($string);
  47         } else if ($res[1] == '3') {
  48             include_once(SM_PATH . 'functions/decode/iso8859-3.php');
  49             $ret = charset_decode_iso8859_3 ($string);
  50         } else if ($res[1] == '4') {
  51             include_once(SM_PATH . 'functions/decode/iso8859-4.php');
  52             $ret = charset_decode_iso8859_4 ($string);
  53         } else if ($res[1] == '5') {
  54             include_once(SM_PATH . 'functions/decode/iso8859-5.php');
  55             $ret = charset_decode_iso8859_5 ($string);
  56         } else if ($res[1] == '6') {
  57             include_once(SM_PATH . 'functions/decode/iso8859-6.php');
  58             $ret = charset_decode_iso8859_6 ($string);
  59         } else if ($res[1] == '7') {
  60             include_once(SM_PATH . 'functions/decode/iso8859-7.php');
  61             $ret = charset_decode_iso8859_7 ($string);
  62         } else if ($res[1] == '8') {
  63             include_once(SM_PATH . 'functions/decode/iso8859-8.php');
  64             $ret = charset_decode_iso8859_8 ($string);
  65         } else if ($res[1] == '9') {
  66             include_once(SM_PATH . 'functions/decode/iso8859-9.php');
  67             $ret = charset_decode_iso8859_9 ($string);
  68         } else if ($res[1] == '10') {
  69             include_once(SM_PATH . 'functions/decode/iso8859-10.php');
  70             $ret = charset_decode_iso8859_10 ($string);
  71         } else if ($res[1] == '11') {
  72             include_once(SM_PATH . 'functions/decode/iso8859-11.php');
  73             $ret = charset_decode_iso8859_11 ($string);
  74         } else if ($res[1] == '13') {
  75             include_once(SM_PATH . 'functions/decode/iso8859-13.php');
  76             $ret = charset_decode_iso8859_13 ($string);
  77         } else if ($res[1] == '14') {
  78             include_once(SM_PATH . 'functions/decode/iso8859-14.php');
  79             $ret = charset_decode_iso8859_14 ($string);
  80         } else if ($res[1] == '15') {
  81             include_once(SM_PATH . 'functions/decode/iso8859-15.php');
  82             $ret = charset_decode_iso8859_15 ($string);
  83         } else if ($res[1] == '16') {
  84             include_once(SM_PATH . 'functions/decode/iso8859-16.php');
  85             $ret = charset_decode_iso8859_16 ($string);
  86         } else {
  87             $ret = charset_decode_iso_8859_default ($string);
  88         }
  89     } else if ($charset == 'ns_4551-1') {
  90         $ret = charset_decode_ns_4551_1 ($string);
  91     } else if ($charset == 'koi8-r') {
  92         include_once(SM_PATH . 'functions/decode/koi8-r.php');
  93         $ret = charset_decode_koi8r ($string);
  94     } else if ($charset == 'koi8-u') {
  95         include_once(SM_PATH . 'functions/decode/koi8-u.php');
  96         $ret = charset_decode_koi8u ($string);
  97     } else if ($charset == 'windows-1250') {
  98         include_once(SM_PATH . 'functions/decode/cp1250.php');
  99         $ret = charset_decode_cp1250 ($string);
 100     } else if ($charset == 'windows-1251') {
 101         include_once(SM_PATH . 'functions/decode/cp1251.php');
 102         $ret = charset_decode_cp1251 ($string);
 103     } else if ($charset == 'windows-1252') {
 104         include_once(SM_PATH . 'functions/decode/cp1252.php');
 105         $ret = charset_decode_cp1252 ($string);
 106     } else if ($charset == 'windows-1253') {
 107         include_once(SM_PATH . 'functions/decode/cp1253.php');
 108         $ret = charset_decode_cp1253 ($string);
 109     } else if ($charset == 'windows-1254') {
 110         include_once(SM_PATH . 'functions/decode/cp1254.php');
 111         $ret = charset_decode_cp1254 ($string);
 112     } else if ($charset == 'windows-1255') {
 113         include_once(SM_PATH . 'functions/decode/cp1255.php');
 114         $ret = charset_decode_cp1255 ($string);
 115     } else if ($charset == 'windows-1256') {
 116         include_once(SM_PATH . 'functions/decode/cp1256.php');
 117         $ret = charset_decode_cp1256 ($string);
 118     } else if ($charset == 'windows-1257') {
 119         include_once(SM_PATH . 'functions/decode/cp1257.php');
 120         $ret = charset_decode_cp1257 ($string);
 121     } else if ($charset == 'windows-1258') {
 122         include_once(SM_PATH . 'functions/decode/cp1258.php');
 123         $ret = charset_decode_cp1258 ($string);
 124     } else if ($charset == 'big5' and $agresive_decoding ) {
 125         include_once(SM_PATH . 'functions/decode/big5.php');
 126         $ret = charset_decode_big5 ($string);
 127     } else if ($charset == 'gb2312' and $agresive_decoding ) {
 128         include_once(SM_PATH . 'functions/decode/gb2312.php');
 129         $ret = charset_decode_gb2312 ($string);
 130     } else if ($charset == 'utf-8') {
 131         include_once(SM_PATH . 'functions/decode/utf-8.php');
 132         $ret = charset_decode_utf8 ($string);
 133     } else {
 134         $ret = $string;
 135     }
 136     return( $ret );
 137 }
 138
 139
 140 /* Remove all 8 bit characters from all other ISO-8859 character sets */
 141 function charset_decode_iso_8859_default ($string) {
 142     return (strtr($string, "\240\241\242\243\244\245\246\247".
 143                     "\250\251\252\253\254\255\256\257".
 144                     "\260\261\262\263\264\265\266\267".
 145                     "\270\271\272\273\274\275\276\277".
 146                     "\300\301\302\303\304\305\306\307".
 147                     "\310\311\312\313\314\315\316\317".
 148                     "\320\321\322\323\324\325\326\327".
 149                     "\330\331\332\333\334\335\336\337".
 150                     "\340\341\342\343\344\345\346\347".
 151                     "\350\351\352\353\354\355\356\357".
 152                     "\360\361\362\363\364\365\366\367".
 153                     "\370\371\372\373\374\375\376\377",
 154                     "????????????????????????????????????????".
 155                     "????????????????????????????????????????".
 156                     "????????????????????????????????????????".
 157                     "????????"));
 158
 159 }
 160
 161 /*
 162  * This is the same as ISO-646-NO and is used by some
 163  * Microsoft programs when sending Norwegian characters
 164  */
 165 function charset_decode_ns_4551_1 ($string) {
 166     /*
 167      * These characters are:
 168      * Latin capital letter AE
 169      * Latin capital letter O with stroke
 170      * Latin capital letter A with ring above
 171      * and the same as small letters
 172      */
 173     return strtr ($string, "[\\]{|}", "ÆØÅæøå");
 174 }
 175
 176
 177 /*
 178  * Set up the language to be output
 179  * if $do_search is true, then scan the browser information
 180  * for a possible language that we know
 181  */
 182 function set_up_language($sm_language, $do_search = false, $default = false) {
 183
 184     static $SetupAlready = 0;
 185     global $use_gettext, $languages,
 186            $squirrelmail_language, $squirrelmail_default_language,
 187            $sm_notAlias;
 188
 189     if ($SetupAlready) {
 190         return;
 191     }
 192
 193     $SetupAlready = TRUE;
 194     sqgetGlobalVar('HTTP_ACCEPT_LANGUAGE',  $accept_lang, SQ_SERVER);
 195
 196     if ($do_search && ! $sm_language && isset($accept_lang)) {
 197         $sm_language = substr($accept_lang, 0, 2);
 198     }
 199
 200     if ((!$sm_language||$default) && isset($squirrelmail_default_language)) {
 201         $squirrelmail_language = $squirrelmail_default_language;
 202         $sm_language = $squirrelmail_default_language;
 203     }
 204     $sm_notAlias = $sm_language;
 205     while (isset($languages[$sm_notAlias]['ALIAS'])) {
 206         $sm_notAlias = $languages[$sm_notAlias]['ALIAS'];
 207     }
 208
 209     if ( isset($sm_language) &&
 210          $use_gettext &&
 211          $sm_language != '' &&
 212          isset($languages[$sm_notAlias]['CHARSET']) ) {
 213         bindtextdomain( 'squirrelmail', SM_PATH . 'locale/' );
 214         textdomain( 'squirrelmail' );
 215         if (function_exists('bind_textdomain_codeset')) {
 216              bind_textdomain_codeset ("squirrelmail", $languages[$sm_notAlias]['CHARSET'] );
 217         }
 218         if ( !ini_get('safe_mode') &&
 219              getenv( 'LC_ALL' ) != $sm_notAlias ) {
 220             putenv( "LC_ALL=$sm_notAlias" );
 221             putenv( "LANG=$sm_notAlias" );
 222             putenv( "LANGUAGE=$sm_notAlias" );
 223         }
 224         setlocale(LC_ALL, $sm_notAlias);
 225         $squirrelmail_language = $sm_notAlias;
 226         if ($squirrelmail_language == 'ja_JP' && function_exists('mb_detect_encoding') ) {
 227             header ('Content-Type: text/html; charset=EUC-JP');
 228             if (!function_exists('mb_internal_encoding')) {
 229                 echo _("You need to have php4 installed with the multibyte string function enabled (using configure option --enable-mbstring).");
 230             }
 231             if (function_exists('mb_language')) {
 232                 mb_language('Japanese');
 233             }
 234             mb_internal_encoding('EUC-JP');
 235             mb_http_output('pass');
 236         } else {
 237         header( 'Content-Type: text/html; charset=' . $languages[$sm_notAlias]['CHARSET'] );
 238     }
 239 }
 240 }
 241
 242 function set_my_charset(){
 243
 244     /*
 245      * There can be a $default_charset setting in the
 246      * config.php file, but the user may have a different language
 247      * selected for a user interface. This function checks the
 248      * language selected by the user and tags the outgoing messages
 249      * with the appropriate charset corresponding to the language
 250      * selection. This is "more right" (tm), than just stamping the
 251      * message blindly with the system-wide $default_charset.
 252      */
 253     global $data_dir, $username, $default_charset, $languages, $squirrelmail_default_language;
 254
 255     $my_language = getPref($data_dir, $username, 'language');
 256     if (!$my_language) {
 257         $my_language = $squirrelmail_default_language ;
 258     }
 259     while (isset($languages[$my_language]['ALIAS'])) {
 260         $my_language = $languages[$my_language]['ALIAS'];
 261     }
 262     $my_charset = $languages[$my_language]['CHARSET'];
 263     if ($my_charset) {
 264         $default_charset = $my_charset;
 265     }
 266 }
 267
 268 /* ------------------------------ main --------------------------- */
 269
 270 global $squirrelmail_language, $languages, $use_gettext;
 271
 272 if (! isset($squirrelmail_language)) {
 273     $squirrelmail_language = '';
 274 }
 275
 276 /* This array specifies the available languages. */
 277
 278 // The glibc locale is ca_ES.
 279
 280 $languages['ca_ES']['NAME']    = 'Catalan';
 281 $languages['ca_ES']['CHARSET'] = 'iso-8859-1';
 282 $languages['ca']['ALIAS'] = 'ca_ES';
 283
 284 $languages['cs_CZ']['NAME']    = 'Czech';
 285 $languages['cs_CZ']['CHARSET'] = 'iso-8859-2';
 286 $languages['cs']['ALIAS']      = 'cs_CZ';
 287
 288 // Danish locale is da_DK.
 289
 290 $languages['da_DK']['NAME']    = 'Danish';
 291 $languages['da_DK']['CHARSET'] = 'iso-8859-1';
 292 $languages['da']['ALIAS'] = 'da_DK';
 293
 294 $languages['de_DE']['NAME']    = 'Deutsch';
 295 $languages['de_DE']['CHARSET'] = 'iso-8859-1';
 296 $languages['de']['ALIAS'] = 'de_DE';
 297
 298 // There is no en_EN! There is en_US, en_BR, en_AU, and so forth,
 299 // but who cares about !US, right? Right? :)
 300
 301 $languages['el_GR']['NAME']    = 'Greek';
 302 $languages['el_GR']['CHARSET'] = 'iso-8859-7';
 303 $languages['el']['ALIAS'] = 'el_GR';
 304
 305 $languages['en_US']['NAME']    = 'English';
 306 $languages['en_US']['CHARSET'] = 'iso-8859-1';
 307 $languages['en']['ALIAS'] = 'en_US';
 308
 309 $languages['es_ES']['NAME']    = 'Spanish';
 310 $languages['es_ES']['CHARSET'] = 'iso-8859-1';
 311 $languages['es']['ALIAS'] = 'es_ES';
 312
 313 $languages['et_EE']['NAME']    = 'Estonian';
 314 $languages['et_EE']['CHARSET'] = 'iso-8859-15';
 315 $languages['et']['ALIAS'] = 'et_EE';
 316
 317 $languages['fo_FO']['NAME']    = 'Faroese';
 318 $languages['fo_FO']['CHARSET'] = 'iso-8859-1';
 319 $languages['fo']['ALIAS'] = 'fo_FO';
 320
 321 $languages['fi_FI']['NAME']    = 'Finnish';
 322 $languages['fi_FI']['CHARSET'] = 'iso-8859-1';
 323 $languages['fi']['ALIAS'] = 'fi_FI';
 324
 325 $languages['fr_FR']['NAME']    = 'French';
 326 $languages['fr_FR']['CHARSET'] = 'iso-8859-1';
 327 $languages['fr']['ALIAS'] = 'fr_FR';
 328
 329 $languages['hr_HR']['NAME']    = 'Croatian';
 330 $languages['hr_HR']['CHARSET'] = 'iso-8859-2';
 331 $languages['hr']['ALIAS'] = 'hr_HR';
 332
 333 $languages['hu_HU']['NAME']    = 'Hungarian';
 334 $languages['hu_HU']['CHARSET'] = 'iso-8859-2';
 335 $languages['hu']['ALIAS'] = 'hu_HU';
 336
 337 $languages['id_ID']['NAME']    = 'Bahasa Indonesia';
 338 $languages['id_ID']['CHARSET'] = 'iso-8859-1';
 339 $languages['id']['ALIAS'] = 'id_ID';
 340
 341 $languages['is_IS']['NAME']    = 'Icelandic';
 342 $languages['is_IS']['CHARSET'] = 'iso-8859-1';
 343 $languages['is']['ALIAS'] = 'is_IS';
 344
 345 $languages['it_IT']['NAME']    = 'Italian';
 346 $languages['it_IT']['CHARSET'] = 'iso-8859-1';
 347 $languages['it']['ALIAS'] = 'it_IT';
 348
 349 $languages['ja_JP']['NAME']    = 'Japanese';
 350 $languages['ja_JP']['CHARSET'] = 'iso-2022-jp';
 351 $languages['ja_JP']['XTRA_CODE'] = 'japanese_charset_xtra';
 352 $languages['ja']['ALIAS'] = 'ja_JP';
 353
 354 $languages['ko_KR']['NAME']    = 'Korean';
 355 $languages['ko_KR']['CHARSET'] = 'euc-KR';
 356 $languages['ko_KR']['XTRA_CODE'] = 'korean_charset_xtra';
 357 $languages['ko']['ALIAS'] = 'ko_KR';
 358
 359 $languages['nl_NL']['NAME']    = 'Dutch';
 360 $languages['nl_NL']['CHARSET'] = 'iso-8859-1';
 361 $languages['nl']['ALIAS'] = 'nl_NL';
 362
 363 $languages['no_NO']['NAME']    = 'Norwegian (Bokm&aring;l)';
 364 $languages['no_NO']['CHARSET'] = 'iso-8859-1';
 365 $languages['no']['ALIAS'] = 'no_NO';
 366 $languages['nn_NO']['NAME']    = 'Norwegian (Nynorsk)';
 367 $languages['nn_NO']['CHARSET'] = 'iso-8859-1';
 368
 369 $languages['pl_PL']['NAME']    = 'Polish';
 370 $languages['pl_PL']['CHARSET'] = 'iso-8859-2';
 371 $languages['pl']['ALIAS'] = 'pl_PL';
 372
 373 $languages['pt_PT']['NAME'] = 'Portuguese (Portugal)';
 374 $languages['pt_PT']['CHARSET'] = 'iso-8859-1';
 375 $languages['pt_BR']['NAME']    = 'Portuguese (Brazil)';
 376 $languages['pt_BR']['CHARSET'] = 'iso-8859-1';
 377 $languages['pt']['ALIAS'] = 'pt_PT';
 378
 379 $languages['ru_RU']['NAME']    = 'Russian';
 380 $languages['ru_RU']['CHARSET'] = 'koi8-r';
 381 $languages['ru']['ALIAS'] = 'ru_RU';
 382
 383 $languages['sr_YU']['NAME']    = 'Serbian';
 384 $languages['sr_YU']['CHARSET'] = 'iso-8859-2';
 385 $languages['sr']['ALIAS'] = 'sr_YU';
 386
 387 $languages['sv_SE']['NAME']    = 'Swedish';
 388 $languages['sv_SE']['CHARSET'] = 'iso-8859-1';
 389 $languages['sv']['ALIAS'] = 'sv_SE';
 390
 391 $languages['tr_TR']['NAME']    = 'Turkish';
 392 $languages['tr_TR']['CHARSET'] = 'iso-8859-9';
 393 $languages['tr']['ALIAS'] = 'tr_TR';
 394
 395 $languages['zh_TW']['NAME']    = 'Chinese Trad';
 396 $languages['zh_TW']['CHARSET'] = 'big5';
 397 $languages['tw']['ALIAS'] = 'zh_TW';
 398
 399 $languages['zh_CN']['NAME']    = 'Chinese Simp';
 400 $languages['zh_CN']['CHARSET'] = 'gb2312';
 401 $languages['cn']['ALIAS'] = 'zh_CN';
 402
 403 $languages['sk_SK']['NAME']     = 'Slovak';
 404 $languages['sk_SK']['CHARSET']  = 'iso-8859-2';
 405 $languages['sk']['ALIAS']       = 'sk_SK';
 406
 407 $languages['ro_RO']['NAME']    = 'Romanian';
 408 $languages['ro_RO']['CHARSET'] = 'iso-8859-2';
 409 $languages['ro']['ALIAS'] = 'ro_RO';
 410
 411 $languages['th_TH']['NAME']    = 'Thai';
 412 $languages['th_TH']['CHARSET'] = 'tis-620';
 413 $languages['th']['ALIAS'] = 'th_TH';
 414
 415 $languages['lt_LT']['NAME']    = 'Lithuanian';
 416 $languages['lt_LT']['CHARSET'] = 'windows-1257';
 417 $languages['lt']['ALIAS'] = 'lt_LT';
 418
 419 $languages['sl_SI']['NAME']    = 'Slovenian';
 420 $languages['sl_SI']['CHARSET'] = 'iso-8859-2';
 421 $languages['sl']['ALIAS'] = 'sl_SI';
 422
 423 $languages['bg_BG']['NAME']    = 'Bulgarian';
 424 $languages['bg_BG']['CHARSET'] = 'windows-1251';
 425 $languages['bg']['ALIAS'] = 'bg_BG';
 426
 427 $languages['uk_UA']['NAME']    = 'Ukrainian';
 428 $languages['uk_UA']['CHARSET'] = 'koi8-u';
 429 $languages['uk']['ALIAS'] = 'uk_UA';
 430
 431 $languages['cy_GB']['NAME']    = 'Welsh';
 432 $languages['cy_GB']['CHARSET'] = 'iso-8859-1';
 433 $languages['cy']['ALIAS'] = 'cy_GB';
 434
 435 $languages['vi_VN']['NAME']    = 'Vietnamese';
 436 $languages['vi_VN']['CHARSET'] = 'utf-8';
 437 $languages['vi']['ALIAS'] = 'vi_VN';
 438
 439 // Right to left languages
 440
 441 $languages['ar']['NAME']    = 'Arabic';
 442 $languages['ar']['CHARSET'] = 'windows-1256';
 443 $languages['ar']['DIR']     = 'rtl';
 444
 445 $languages['he_IL']['NAME']    = 'Hebrew';
 446 $languages['he_IL']['CHARSET'] = 'windows-1255';
 447 $languages['he_IL']['DIR']     = 'rtl';
 448 $languages['he']['ALIAS']      = 'he_IL';
 449
 450 /* Detect whether gettext is installed. */
 451 $gettext_flags = 0;
 452 if (function_exists('_')) {
 453     $gettext_flags += 1;
 454 }
 455 if (function_exists('bindtextdomain')) {
 456     $gettext_flags += 2;
 457 }
 458 if (function_exists('textdomain')) {
 459     $gettext_flags += 4;
 460 }
 461
 462 /* If gettext is fully loaded, cool */
 463 if ($gettext_flags == 7) {
 464     $use_gettext = true;
 465 }
 466 /* If we can fake gettext, try that */
 467 elseif ($gettext_flags == 0) {
 468     $use_gettext = true;
 469     include_once(SM_PATH . 'functions/gettext.php');
 470 } else {
 471     /* Uh-ho.  A weird install */
 472     if (! $gettext_flags & 1) {
 473         function _($str) {
 474             return $str;
 475         }
 476     }
 477     if (! $gettext_flags & 2) {
 478         function bindtextdomain() {
 479             return;
 480         }
 481     }
 482     if (! $gettext_flags & 4) {
 483         function textdomain() {
 484             return;
 485         }
 486     }
 487 }
 488
 489
 490 /*
 491  * Japanese charset extra function
 492  *
 493  */
 494 function japanese_charset_xtra() {
 495     $ret = func_get_arg(1);  /* default return value */
 496     if (function_exists('mb_detect_encoding')) {
 497         switch (func_get_arg(0)) { /* action */
 498         case 'decode':
 499             $detect_encoding = @mb_detect_encoding($ret);
 500             if ($detect_encoding == 'JIS' ||
 501                 $detect_encoding == 'EUC-JP' ||
 502                 $detect_encoding == 'SJIS' ||
 503                 $detect_encoding == 'UTF-8') {
 504
 505                 $ret = mb_convert_kana(mb_convert_encoding($ret, 'EUC-JP', 'AUTO'), "KV");
 506             }
 507             break;
 508         case 'encode':
 509             $detect_encoding = @mb_detect_encoding($ret);
 510             if ($detect_encoding == 'JIS' ||
 511                 $detect_encoding == 'EUC-JP' ||
 512                 $detect_encoding == 'SJIS' ||
 513                 $detect_encoding == 'UTF-8') {
 514
 515                 $ret = mb_convert_encoding(mb_convert_kana($ret, "KV"), 'JIS', 'AUTO');
 516             }
 517             break;
 518         case 'strimwidth':
 519             $width = func_get_arg(2);
 520             $ret = mb_strimwidth($ret, 0, $width, '...');
 521             break;
 522         case 'encodeheader':
 523             $result = '';
 524             if (strlen($ret) > 0) {
 525                 $tmpstr = mb_substr($ret, 0, 1);
 526                 $prevcsize = strlen($tmpstr);
 527                 for ($i = 1; $i < mb_strlen($ret); $i++) {
 528                     $tmp = mb_substr($ret, $i, 1);
 529                     if (strlen($tmp) == $prevcsize) {
 530                         $tmpstr .= $tmp;
 531                     } else {
 532                         if ($prevcsize == 1) {
 533                             $result .= $tmpstr;
 534                         } else {
 535                             $result .= str_replace(' ', '',
 536                                                    mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
 537                         }
 538                         $tmpstr = $tmp;
 539                         $prevcsize = strlen($tmp);
 540                     }
 541                 }
 542                 if (strlen($tmpstr)) {
 543                     if (strlen(mb_substr($tmpstr, 0, 1)) == 1)
 544                         $result .= $tmpstr;
 545                     else
 546                         $result .= str_replace(' ', '',
 547                                                mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
 548                 }
 549             }
 550             $ret = $result;
 551             break;
 552         case 'decodeheader':
 553             $ret = str_replace("\t", "", $ret);
 554             if (eregi('=\\?([^?]+)\\?(q|b)\\?([^?]+)\\?=', $ret))
 555                 $ret = @mb_decode_mimeheader($ret);
 556             $ret = @mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
 557             break;
 558         case 'downloadfilename':
 559             $useragent = func_get_arg(2);
 560             if (strstr($useragent, 'Windows') !== false ||
 561                 strstr($useragent, 'Mac_') !== false) {
 562                 $ret = mb_convert_encoding($ret, 'SJIS', 'AUTO');
 563             } else {
 564                 $ret = mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
 565 }
 566             break;
 567         case 'wordwrap':
 568             $no_begin = "\x21\x25\x29\x2c\x2e\x3a\x3b\x3f\x5d\x7d\xa1\xf1\xa1\xeb\xa1" .
 569                 "\xc7\xa1\xc9\xa2\xf3\xa1\xec\xa1\xed\xa1\xee\xa1\xa2\xa1\xa3\xa1\xb9" .
 570                 "\xa1\xd3\xa1\xd5\xa1\xd7\xa1\xd9\xa1\xdb\xa1\xcd\xa4\xa1\xa4\xa3\xa4" .
 571                 "\xa5\xa4\xa7\xa4\xa9\xa4\xc3\xa4\xe3\xa4\xe5\xa4\xe7\xa4\xee\xa1\xab" .
 572                 "\xa1\xac\xa1\xb5\xa1\xb6\xa5\xa1\xa5\xa3\xa5\xa5\xa5\xa7\xa5\xa9\xa5" .
 573                 "\xc3\xa5\xe3\xa5\xe5\xa5\xe7\xa5\xee\xa5\xf5\xa5\xf6\xa1\xa6\xa1\xbc" .
 574                 "\xa1\xb3\xa1\xb4\xa1\xaa\xa1\xf3\xa1\xcb\xa1\xa4\xa1\xa5\xa1\xa7\xa1" .
 575                 "\xa8\xa1\xa9\xa1\xcf\xa1\xd1";
 576             $no_end = "\x5c\x24\x28\x5b\x7b\xa1\xf2\x5c\xa1\xc6\xa1\xc8\xa1\xd2\xa1" .
 577                 "\xd4\xa1\xd6\xa1\xd8\xa1\xda\xa1\xcc\xa1\xf0\xa1\xca\xa1\xce\xa1\xd0\xa1\xef";
 578             $wrap = func_get_arg(2);
 579
 580             if (strlen($ret) >= $wrap &&
 581                 substr($ret, 0, 1) != '>' &&
 582                 strpos($ret, 'http://') === FALSE &&
 583                 strpos($ret, 'https://') === FALSE &&
 584                 strpos($ret, 'ftp://') === FALSE) {
 585
 586                 $ret = mb_convert_kana($ret, "KV");
 587
 588                 $line_new = '';
 589                 $ptr = 0;
 590
 591                 while ($ptr < strlen($ret) - 1) {
 592                     $l = mb_strcut($ret, $ptr, $wrap);
 593                     $ptr += strlen($l);
 594                     $tmp = $l;
 595
 596                     $l = mb_strcut($ret, $ptr, 2);
 597                     while (strlen($l) != 0 && mb_strpos($no_begin, $l) !== FALSE ) {
 598                         $tmp .= $l;
 599                         $ptr += strlen($l);
 600                         $l = mb_strcut($ret, $ptr, 1);
 601                     }
 602                     $line_new .= $tmp;
 603                     if ($ptr < strlen($ret) - 1)
 604                         $line_new .= "\n";
 605                 }
 606                 $ret = $line_new;
 607             }
 608             break;
 609         case 'utf7-imap_encode':
 610             $ret = mb_convert_encoding($ret, 'UTF7-IMAP', 'EUC-JP');
 611             break;
 612         case 'utf7-imap_decode':
 613             $ret = mb_convert_encoding($ret, 'EUC-JP', 'UTF7-IMAP');
 614             break;
 615         }
 616     }
 617     return $ret;
 618 }
 619
 620
 621 /*
 622  * Korean charset extra function
 623  * Hangul(Korean Character) Attached File Name Fix.
 624  */
 625 function korean_charset_xtra() {
 626
 627     $ret = func_get_arg(1);  /* default return value */
 628     if (func_get_arg(0) == 'downloadfilename') { /* action */
 629         $ret = str_replace("\x0D\x0A", '', $ret);  /* Hanmail's CR/LF Clear */
 630         for ($i=0;$i<strlen($ret);$i++) {
 631             if ($ret[$i] >= "\xA1" && $ret[$i] <= "\xFE") {   /* 0xA1 - 0XFE are Valid */
 632                 $i++;
 633                 continue;
 634             } else if (($ret[$i] >= 'a' && $ret[$i] <= 'z') || /* From Original ereg_replace in download.php */
 635                        ($ret[$i] >= 'A' && $ret[$i] <= 'Z') ||
 636                        ($ret[$i] == '.') || ($ret[$i] == '-')) {
 637                 continue;
 638             } else {
 639                 $ret[$i] = '_';
 640             }
 641         }
 642
 643     }
 644
 645     return $ret;
 646 }
 647
 648 ?>