+
+/**
+ * Japanese charset extra function
+ *
+ * Action performed by function is defined by first argument.
+ * Default return value is defined by second argument.
+ * Use of third argument depends on action.
+ *
+ * @param string $action action performed by this function.
+ * possible values:
+ * decode - convert returned string to euc-jp. third argument unused
+ * encode - convert returned string to jis. third argument unused
+ * strimwidth - third argument=$width. trims string to $width symbols.
+ * encodeheader - create base64 encoded header in iso-2022-jp. third argument unused
+ * decodeheader - return human readable string from mime header. string is returned in euc-jp. third argument unused
+ * downloadfilename - third argument $useragent. Arguments provide browser info. Returns shift-jis or euc-jp encoded file name
+ * wordwrap - third argument=$wrap. wraps text at $wrap symbols
+ * utf7-imap_encode - returns string converted from euc-jp to utf7-imap. third argument unused
+ * utf7-imap_decode - returns string converted from utf7-imap to euc-jp. third argument unused
+ * @param string $ret default return value
+ */
+function japanese_xtra() {
+ $ret = func_get_arg(1); /* default return value */
+ if (function_exists('mb_detect_encoding')) {
+ switch (func_get_arg(0)) { /* action */
+ case 'decode':
+ $detect_encoding = @mb_detect_encoding($ret);
+ if ($detect_encoding == 'JIS' ||
+ $detect_encoding == 'EUC-JP' ||
+ $detect_encoding == 'SJIS' ||
+ $detect_encoding == 'UTF-8') {
+
+ $ret = mb_convert_kana(mb_convert_encoding($ret, 'EUC-JP', 'AUTO'), "KV");
+ }
+ break;
+ case 'encode':
+ $detect_encoding = @mb_detect_encoding($ret);
+ if ($detect_encoding == 'JIS' ||
+ $detect_encoding == 'EUC-JP' ||
+ $detect_encoding == 'SJIS' ||
+ $detect_encoding == 'UTF-8') {
+
+ $ret = mb_convert_encoding(mb_convert_kana($ret, "KV"), 'JIS', 'AUTO');
+ }
+ break;
+ case 'strimwidth':
+ $width = func_get_arg(2);
+ $ret = mb_strimwidth($ret, 0, $width, '...');
+ break;
+ case 'encodeheader':
+ $result = '';
+ if (strlen($ret) > 0) {
+ $tmpstr = mb_substr($ret, 0, 1);
+ $prevcsize = strlen($tmpstr);
+ for ($i = 1; $i < mb_strlen($ret); $i++) {
+ $tmp = mb_substr($ret, $i, 1);
+ if (strlen($tmp) == $prevcsize) {
+ $tmpstr .= $tmp;
+ } else {
+ if ($prevcsize == 1) {
+ $result .= $tmpstr;
+ } else {
+ $result .= str_replace(' ', '',
+ mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
+ }
+ $tmpstr = $tmp;
+ $prevcsize = strlen($tmp);
+ }
+ }
+ if (strlen($tmpstr)) {
+ if (strlen(mb_substr($tmpstr, 0, 1)) == 1)
+ $result .= $tmpstr;
+ else
+ $result .= str_replace(' ', '',
+ mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
+ }
+ }
+ $ret = $result;
+ break;
+ case 'decodeheader':
+ $ret = str_replace("\t", "", $ret);
+ if (eregi('=\\?([^?]+)\\?(q|b)\\?([^?]+)\\?=', $ret))
+ $ret = @mb_decode_mimeheader($ret);
+ $ret = @mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
+ break;
+ case 'downloadfilename':
+ $useragent = func_get_arg(2);
+ if (strstr($useragent, 'Windows') !== false ||
+ strstr($useragent, 'Mac_') !== false) {
+ $ret = mb_convert_encoding($ret, 'SJIS', 'AUTO');
+ } else {
+ $ret = mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
+}
+ break;
+ case 'wordwrap':
+ $no_begin = "\x21\x25\x29\x2c\x2e\x3a\x3b\x3f\x5d\x7d\xa1\xf1\xa1\xeb\xa1" .
+ "\xc7\xa1\xc9\xa2\xf3\xa1\xec\xa1\xed\xa1\xee\xa1\xa2\xa1\xa3\xa1\xb9" .
+ "\xa1\xd3\xa1\xd5\xa1\xd7\xa1\xd9\xa1\xdb\xa1\xcd\xa4\xa1\xa4\xa3\xa4" .
+ "\xa5\xa4\xa7\xa4\xa9\xa4\xc3\xa4\xe3\xa4\xe5\xa4\xe7\xa4\xee\xa1\xab" .
+ "\xa1\xac\xa1\xb5\xa1\xb6\xa5\xa1\xa5\xa3\xa5\xa5\xa5\xa7\xa5\xa9\xa5" .
+ "\xc3\xa5\xe3\xa5\xe5\xa5\xe7\xa5\xee\xa5\xf5\xa5\xf6\xa1\xa6\xa1\xbc" .
+ "\xa1\xb3\xa1\xb4\xa1\xaa\xa1\xf3\xa1\xcb\xa1\xa4\xa1\xa5\xa1\xa7\xa1" .
+ "\xa8\xa1\xa9\xa1\xcf\xa1\xd1";
+ $no_end = "\x5c\x24\x28\x5b\x7b\xa1\xf2\x5c\xa1\xc6\xa1\xc8\xa1\xd2\xa1" .
+ "\xd4\xa1\xd6\xa1\xd8\xa1\xda\xa1\xcc\xa1\xf0\xa1\xca\xa1\xce\xa1\xd0\xa1\xef";
+ $wrap = func_get_arg(2);
+
+ if (strlen($ret) >= $wrap &&
+ substr($ret, 0, 1) != '>' &&
+ strpos($ret, 'http://') === FALSE &&
+ strpos($ret, 'https://') === FALSE &&
+ strpos($ret, 'ftp://') === FALSE) {
+
+ $ret = mb_convert_kana($ret, "KV");
+
+ $line_new = '';
+ $ptr = 0;
+
+ while ($ptr < strlen($ret) - 1) {
+ $l = mb_strcut($ret, $ptr, $wrap);
+ $ptr += strlen($l);
+ $tmp = $l;
+
+ $l = mb_strcut($ret, $ptr, 2);
+ while (strlen($l) != 0 && mb_strpos($no_begin, $l) !== FALSE ) {
+ $tmp .= $l;
+ $ptr += strlen($l);
+ $l = mb_strcut($ret, $ptr, 1);
+ }
+ $line_new .= $tmp;
+ if ($ptr < strlen($ret) - 1)
+ $line_new .= "\n";
+ }
+ $ret = $line_new;
+ }
+ break;
+ case 'utf7-imap_encode':
+ $ret = mb_convert_encoding($ret, 'UTF7-IMAP', 'EUC-JP');
+ break;
+ case 'utf7-imap_decode':
+ $ret = mb_convert_encoding($ret, 'EUC-JP', 'UTF7-IMAP');
+ break;
+ }
+ }
+ return $ret;
+}
+
+/**************************
+ * Japanese extra functions
+ **************************/
+
+/**
+ * Japanese decoding function
+ *
+ * converts string to euc-jp, if string uses JIS, EUC-JP, ShiftJIS or UTF-8
+ * charset. Needs mbstring support in php.
+ * @param string $ret text, that has to be converted
+ * @return string converted string
+ * @since 1.5.1
+ */
+function japanese_xtra_decode($ret) {
+ if (function_exists('mb_detect_encoding')) {
+ $detect_encoding = @mb_detect_encoding($ret);
+ if ($detect_encoding == 'JIS' ||
+ $detect_encoding == 'EUC-JP' ||
+ $detect_encoding == 'SJIS' ||
+ $detect_encoding == 'UTF-8') {
+
+ $ret = mb_convert_kana(mb_convert_encoding($ret, 'EUC-JP', 'AUTO'), "KV");
+ }
+ }
+ return $ret;
+}
+
+/**
+ * Japanese encoding function
+ *
+ * converts string to jis, if string uses JIS, EUC-JP, ShiftJIS or UTF-8
+ * charset. Needs mbstring support in php.
+ * @param string $ret text, that has to be converted
+ * @return string converted text
+ * @since 1.5.1
+ */
+function japanese_xtra_encode($ret) {
+ if (function_exists('mb_detect_encoding')) {
+ $detect_encoding = @mb_detect_encoding($ret);
+ if ($detect_encoding == 'JIS' ||
+ $detect_encoding == 'EUC-JP' ||
+ $detect_encoding == 'SJIS' ||
+ $detect_encoding == 'UTF-8') {
+
+ $ret = mb_convert_encoding(mb_convert_kana($ret, "KV"), 'JIS', 'AUTO');
+ }
+ }
+ return $ret;
+}
+
+/**
+ * Japanese header encoding function
+ *
+ * creates base64 encoded header in iso-2022-jp charset
+ * @param string $ret text, that has to be converted
+ * @return string mime base64 encoded string
+ * @since 1.5.1
+ */
+function japanese_xtra_encodeheader($ret) {
+ if (function_exists('mb_detect_encoding')) {
+ $result = '';
+ if (strlen($ret) > 0) {
+ $tmpstr = mb_substr($ret, 0, 1);
+ $prevcsize = strlen($tmpstr);
+ for ($i = 1; $i < mb_strlen($ret); $i++) {
+ $tmp = mb_substr($ret, $i, 1);
+ if (strlen($tmp) == $prevcsize) {
+ $tmpstr .= $tmp;
+ } else {
+ if ($prevcsize == 1) {
+ $result .= $tmpstr;
+ } else {
+ $result .= str_replace(' ', '',
+ mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
+ }
+ $tmpstr = $tmp;
+ $prevcsize = strlen($tmp);
+ }
+ }
+ if (strlen($tmpstr)) {
+ if (strlen(mb_substr($tmpstr, 0, 1)) == 1)
+ $result .= $tmpstr;
+ else
+ $result .= str_replace(' ', '',
+ mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
+ }
+ }
+ $ret = $result;
+ }
+ return $ret;
+}
+
+/**
+ * Japanese header decoding function
+ *
+ * return human readable string from mime header. string is returned in euc-jp
+ * charset.
+ * @param string $ret header string
+ * @return string decoded header string
+ * @since 1.5.1
+ */
+function japanese_xtra_decodeheader($ret) {
+ if (function_exists('mb_detect_encoding')) {
+ $ret = str_replace("\t", "", $ret);
+ if (eregi('=\\?([^?]+)\\?(q|b)\\?([^?]+)\\?=', $ret))
+ $ret = @mb_decode_mimeheader($ret);
+ $ret = @mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
+ }
+ return $ret;
+}
+
+/**
+ * Japanese downloaded filename processing function
+ *
+ * Returns shift-jis or euc-jp encoded file name
+ * @param string $ret string
+ * @param string $useragent browser
+ * @return string converted string
+ * @since 1.5.1
+ */
+function japanese_xtra_downloadfilename($ret,$useragent) {
+ if (function_exists('mb_detect_encoding')) {
+ if (strstr($useragent, 'Windows') !== false ||
+ strstr($useragent, 'Mac_') !== false) {
+ $ret = mb_convert_encoding($ret, 'SJIS', 'AUTO');
+ } else {
+ $ret = mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
+ }
+ }
+ return $ret;
+}
+
+/**
+ * Japanese wordwrap function
+ *
+ * wraps text at set number of symbols
+ * @param string $ret text
+ * @param integer $wrap number of symbols per line
+ * @return string wrapped text
+ * @since 1.5.1
+ */
+function japanese_xtra_wordwrap($ret,$wrap) {
+ if (function_exists('mb_detect_encoding')) {
+ $no_begin = "\x21\x25\x29\x2c\x2e\x3a\x3b\x3f\x5d\x7d\xa1\xf1\xa1\xeb\xa1" .
+ "\xc7\xa1\xc9\xa2\xf3\xa1\xec\xa1\xed\xa1\xee\xa1\xa2\xa1\xa3\xa1\xb9" .
+ "\xa1\xd3\xa1\xd5\xa1\xd7\xa1\xd9\xa1\xdb\xa1\xcd\xa4\xa1\xa4\xa3\xa4" .
+ "\xa5\xa4\xa7\xa4\xa9\xa4\xc3\xa4\xe3\xa4\xe5\xa4\xe7\xa4\xee\xa1\xab" .
+ "\xa1\xac\xa1\xb5\xa1\xb6\xa5\xa1\xa5\xa3\xa5\xa5\xa5\xa7\xa5\xa9\xa5" .
+ "\xc3\xa5\xe3\xa5\xe5\xa5\xe7\xa5\xee\xa5\xf5\xa5\xf6\xa1\xa6\xa1\xbc" .
+ "\xa1\xb3\xa1\xb4\xa1\xaa\xa1\xf3\xa1\xcb\xa1\xa4\xa1\xa5\xa1\xa7\xa1" .
+ "\xa8\xa1\xa9\xa1\xcf\xa1\xd1";
+ $no_end = "\x5c\x24\x28\x5b\x7b\xa1\xf2\x5c\xa1\xc6\xa1\xc8\xa1\xd2\xa1" .
+ "\xd4\xa1\xd6\xa1\xd8\xa1\xda\xa1\xcc\xa1\xf0\xa1\xca\xa1\xce\xa1\xd0\xa1\xef";
+
+ if (strlen($ret) >= $wrap &&
+ substr($ret, 0, 1) != '>' &&
+ strpos($ret, 'http://') === FALSE &&
+ strpos($ret, 'https://') === FALSE &&
+ strpos($ret, 'ftp://') === FALSE) {
+
+ $ret = mb_convert_kana($ret, "KV");
+
+ $line_new = '';
+ $ptr = 0;
+
+ while ($ptr < strlen($ret) - 1) {
+ $l = mb_strcut($ret, $ptr, $wrap);
+ $ptr += strlen($l);
+ $tmp = $l;
+
+ $l = mb_strcut($ret, $ptr, 2);
+ while (strlen($l) != 0 && mb_strpos($no_begin, $l) !== FALSE ) {
+ $tmp .= $l;
+ $ptr += strlen($l);
+ $l = mb_strcut($ret, $ptr, 1);
+ }
+ $line_new .= $tmp;
+ if ($ptr < strlen($ret) - 1)
+ $line_new .= "\n";
+ }
+ $ret = $line_new;
+ }
+ }
+ return $ret;
+}
+
+/**
+ * Japanese imap folder name encoding function
+ *
+ * converts folder name from euc-jp to utf7-imap
+ * @param string $ret folder name
+ * @return string converted folder name
+ * @since 1.5.1
+ */
+function japanese_xtra_utf7_imap_encode($ret){
+ if (function_exists('mb_detect_encoding')) {
+ $ret = mb_convert_encoding($ret, 'UTF7-IMAP', 'EUC-JP');
+ }
+ return $ret;
+}
+
+/**
+ * Japanese imap folder name decoding function
+ *
+ * converts folder name from utf7-imap to euc-jp.
+ * @param string $ret folder name in utf7-imap
+ * @return string converted folder name
+ * @since 1.5.1
+ */
+function japanese_xtra_utf7_imap_decode($ret) {
+ if (function_exists('mb_detect_encoding')) {
+ $ret = mb_convert_encoding($ret, 'EUC-JP', 'UTF7-IMAP');
+ }
+ return $ret;
+}
+
+/**
+ * Japanese string trimming function
+ *
+ * trims string to defined number of symbols
+ * @param string $ret string
+ * @param integer $width number of symbols
+ * @return string trimmed string
+ * @since 1.5.1
+ */
+function japanese_xtra_strimwidth($ret,$width) {
+ if (function_exists('mb_detect_encoding')) {
+ $ret = mb_strimwidth($ret, 0, $width, '...');
+ }
+ return $ret;
+}
+
+/********************************
+ * Korean charset extra functions
+ ********************************/
+
+/**
+ * Korean downloaded filename processing functions
+ *
+ * @param string default return value
+ * @return string
+ */
+function korean_xtra_downloadfilename($ret) {
+ $ret = str_replace("\x0D\x0A", '', $ret); /* Hanmail's CR/LF Clear */
+ for ($i=0;$i<strlen($ret);$i++) {
+ if ($ret[$i] >= "\xA1" && $ret[$i] <= "\xFE") { /* 0xA1 - 0XFE are Valid */
+ $i++;
+ continue;
+ } else if (($ret[$i] >= 'a' && $ret[$i] <= 'z') || /* From Original ereg_replace in download.php */
+ ($ret[$i] >= 'A' && $ret[$i] <= 'Z') ||
+ ($ret[$i] == '.') || ($ret[$i] == '-')) {
+ continue;
+ } else {
+ $ret[$i] = '_';
+ }
+ }
+ return $ret;
+}
+
+/**
+ * Replaces non-braking spaces inserted by some browsers with regular space
+ *
+ * This function can be used to replace non-braking space symbols
+ * that are inserted in forms by some browsers instead of normal
+ * space symbol.
+ *
+ * @param string $string Text that needs to be cleaned
+ * @param string $charset Charset used in text
+ * @return string Cleaned text
+ */
+function cleanup_nbsp($string,$charset) {
+
+ // reduce number of case statements
+ if (stristr('iso-8859-',substr($charset,0,9))){
+ $output_charset="iso-8859-x";
+ }
+ if (stristr('windows-125',substr($charset,0,11))){
+ $output_charset="cp125x";
+ }
+ if (stristr('koi8',substr($charset,0,4))){
+ $output_charset="koi8-x";
+ }
+ if (! isset($output_charset)){
+ $output_charset=strtolower($charset);
+ }
+
+// where is non-braking space symbol
+switch($output_charset):
+ case "iso-8859-x":
+ case "cp125x":
+ case "iso-2022-jp":
+ $nbsp="\xA0";
+ break;
+ case "koi8-x":
+ $nbsp="\x9A";
+ break;
+ case "utf-8":
+ $nbsp="\xC2\xA0";
+ break;
+ default:
+ // don't change string if charset is unmatched
+ return $string;
+endswitch;
+
+// return space instead of non-braking space.
+ return str_replace($nbsp,' ',$string);
+}
+
+/**
+ * Function informs if it is safe to convert given charset to the one that is used by user.
+ *
+ * It is safe to use conversion only if user uses utf-8 encoding and when
+ * converted charset is similar to the one that is used by user.
+ *
+ * @param string $input_charset Charset of text that needs to be converted
+ * @return bool is it possible to convert to user's charset
+ */
+function is_conversion_safe($input_charset) {
+ global $languages, $sm_notAlias, $default_charset;
+
+ // convert to lower case
+ $input_charset = strtolower($input_charset);
+
+ // Is user's locale Unicode based ?
+ if ( $default_charset == "utf-8" ) {
+ return true;
+ }
+
+ // Charsets that are similar
+switch ($default_charset):
+case "windows-1251":
+ if ( $input_charset == "iso-8859-5" ||
+ $input_charset == "koi8-r" ||
+ $input_charset == "koi8-u" ) {
+ return true;
+ } else {
+ return false;
+ }
+case "windows-1257":
+ if ( $input_charset == "iso-8859-13" ||
+ $input_charset == "iso-8859-4" ) {
+ return true;
+ } else {
+ return false;
+ }
+case "iso-8859-4":
+ if ( $input_charset == "iso-8859-13" ||
+ $input_charset == "windows-1257" ) {
+ return true;
+ } else {
+ return false;
+ }
+case "iso-8859-5":
+ if ( $input_charset == "windows-1251" ||
+ $input_charset == "koi8-r" ||
+ $input_charset == "koi8-u" ) {
+ return true;
+ } else {
+ return false;
+ }
+case "iso-8859-13":
+ if ( $input_charset == "iso-8859-4" ||
+ $input_charset == "windows-1257" ) {
+ return true;
+ } else {
+ return false;
+ }
+case "koi8-r":
+ if ( $input_charset == "windows-1251" ||
+ $input_charset == "iso-8859-5" ||
+ $input_charset == "koi8-u" ) {
+ return true;
+ } else {
+ return false;
+ }
+case "koi8-u":
+ if ( $input_charset == "windows-1251" ||
+ $input_charset == "iso-8859-5" ||
+ $input_charset == "koi8-r" ) {
+ return true;
+ } else {
+ return false;
+ }
+default:
+ return false;
+endswitch;
+}