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Diffstat (limited to 'simplepie/idn/idna_convert.class.php')
| -rw-r--r-- | simplepie/idn/idna_convert.class.php | 969 |
1 files changed, 0 insertions, 969 deletions
diff --git a/simplepie/idn/idna_convert.class.php b/simplepie/idn/idna_convert.class.php deleted file mode 100644 index ed2bae26d..000000000 --- a/simplepie/idn/idna_convert.class.php +++ /dev/null @@ -1,969 +0,0 @@ -<?php -// {{{ license - -/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */ -// -// +----------------------------------------------------------------------+ -// | This library 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 2.1 of the | -// | License, or (at your option) any later version. | -// | | -// | This library 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 | -// | Lesser General Public License for more details. | -// | | -// | You should have received a copy of the GNU Lesser General Public | -// | License along with this library; if not, write to the Free Software | -// | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | -// | USA. | -// +----------------------------------------------------------------------+ -// - -// }}} - -/** - * Encode/decode Internationalized Domain Names. - * - * The class allows to convert internationalized domain names - * (see RFC 3490 for details) as they can be used with various registries worldwide - * to be translated between their original (localized) form and their encoded form - * as it will be used in the DNS (Domain Name System). - * - * The class provides two public methods, encode() and decode(), which do exactly - * what you would expect them to do. You are allowed to use complete domain names, - * simple strings and complete email addresses as well. That means, that you might - * use any of the following notations: - * - * - www.nörgler.com - * - xn--nrgler-wxa - * - xn--brse-5qa.xn--knrz-1ra.info - * - * Unicode input might be given as either UTF-8 string, UCS-4 string or UCS-4 - * array. Unicode output is available in the same formats. - * You can select your preferred format via {@link set_paramter()}. - * - * ACE input and output is always expected to be ASCII. - * - * @author Matthias Sommerfeld <mso@phlylabs.de> - * @copyright 2004-2007 phlyLabs Berlin, http://phlylabs.de - * @version 0.5.1 - * - */ -class idna_convert -{ - /** - * Holds all relevant mapping tables, loaded from a seperate file on construct - * See RFC3454 for details - * - * @var array - * @access private - */ - var $NP = array(); - - // Internal settings, do not mess with them - var $_punycode_prefix = 'xn--'; - var $_invalid_ucs = 0x80000000; - var $_max_ucs = 0x10FFFF; - var $_base = 36; - var $_tmin = 1; - var $_tmax = 26; - var $_skew = 38; - var $_damp = 700; - var $_initial_bias = 72; - var $_initial_n = 0x80; - var $_sbase = 0xAC00; - var $_lbase = 0x1100; - var $_vbase = 0x1161; - var $_tbase = 0x11A7; - var $_lcount = 19; - var $_vcount = 21; - var $_tcount = 28; - var $_ncount = 588; // _vcount * _tcount - var $_scount = 11172; // _lcount * _tcount * _vcount - var $_error = false; - - // See {@link set_paramter()} for details of how to change the following - // settings from within your script / application - var $_api_encoding = 'utf8'; // Default input charset is UTF-8 - var $_allow_overlong = false; // Overlong UTF-8 encodings are forbidden - var $_strict_mode = false; // Behave strict or not - - // The constructor - function idna_convert($options = false) - { - $this->slast = $this->_sbase + $this->_lcount * $this->_vcount * $this->_tcount; - if (function_exists('file_get_contents')) { - $this->NP = unserialize(file_get_contents(dirname(__FILE__).'/npdata.ser')); - } else { - $this->NP = unserialize(join('', file(dirname(__FILE__).'/npdata.ser'))); - } - // If parameters are given, pass these to the respective method - if (is_array($options)) { - return $this->set_parameter($options); - } - return true; - } - - /** - * Sets a new option value. Available options and values: - * [encoding - Use either UTF-8, UCS4 as array or UCS4 as string as input ('utf8' for UTF-8, - * 'ucs4_string' and 'ucs4_array' respectively for UCS4); The output is always UTF-8] - * [overlong - Unicode does not allow unnecessarily long encodings of chars, - * to allow this, set this parameter to true, else to false; - * default is false.] - * [strict - true: strict mode, good for registration purposes - Causes errors - * on failures; false: loose mode, ideal for "wildlife" applications - * by silently ignoring errors and returning the original input instead - * - * @param mixed Parameter to set (string: single parameter; array of Parameter => Value pairs) - * @param string Value to use (if parameter 1 is a string) - * @return boolean true on success, false otherwise - * @access public - */ - function set_parameter($option, $value = false) - { - if (!is_array($option)) { - $option = array($option => $value); - } - foreach ($option as $k => $v) { - switch ($k) { - case 'encoding': - switch ($v) { - case 'utf8': - case 'ucs4_string': - case 'ucs4_array': - $this->_api_encoding = $v; - break; - default: - $this->_error('Set Parameter: Unknown parameter '.$v.' for option '.$k); - return false; - } - break; - case 'overlong': - $this->_allow_overlong = ($v) ? true : false; - break; - case 'strict': - $this->_strict_mode = ($v) ? true : false; - break; - default: - $this->_error('Set Parameter: Unknown option '.$k); - return false; - } - } - return true; - } - - /** - * Decode a given ACE domain name - * @param string Domain name (ACE string) - * [@param string Desired output encoding, see {@link set_parameter}] - * @return string Decoded Domain name (UTF-8 or UCS-4) - * @access public - */ - function decode($input, $one_time_encoding = false) - { - // Optionally set - if ($one_time_encoding) { - switch ($one_time_encoding) { - case 'utf8': - case 'ucs4_string': - case 'ucs4_array': - break; - default: - $this->_error('Unknown encoding '.$one_time_encoding); - return false; - } - } - // Make sure to drop any newline characters around - $input = trim($input); - - // Negotiate input and try to determine, whether it is a plain string, - // an email address or something like a complete URL - if (strpos($input, '@')) { // Maybe it is an email address - // No no in strict mode - if ($this->_strict_mode) { - $this->_error('Only simple domain name parts can be handled in strict mode'); - return false; - } - list ($email_pref, $input) = explode('@', $input, 2); - $arr = explode('.', $input); - foreach ($arr as $k => $v) { - if (preg_match('!^'.preg_quote($this->_punycode_prefix, '!').'!', $v)) { - $conv = $this->_decode($v); - if ($conv) $arr[$k] = $conv; - } - } - $input = join('.', $arr); - $arr = explode('.', $email_pref); - foreach ($arr as $k => $v) { - if (preg_match('!^'.preg_quote($this->_punycode_prefix, '!').'!', $v)) { - $conv = $this->_decode($v); - if ($conv) $arr[$k] = $conv; - } - } - $email_pref = join('.', $arr); - $return = $email_pref . '@' . $input; - } elseif (preg_match('![:\./]!', $input)) { // Or a complete domain name (with or without paths / parameters) - // No no in strict mode - if ($this->_strict_mode) { - $this->_error('Only simple domain name parts can be handled in strict mode'); - return false; - } - $parsed = parse_url($input); - if (isset($parsed['host'])) { - $arr = explode('.', $parsed['host']); - foreach ($arr as $k => $v) { - $conv = $this->_decode($v); - if ($conv) $arr[$k] = $conv; - } - $parsed['host'] = join('.', $arr); - $return = - (empty($parsed['scheme']) ? '' : $parsed['scheme'].(strtolower($parsed['scheme']) == 'mailto' ? ':' : '://')) - .(empty($parsed['user']) ? '' : $parsed['user'].(empty($parsed['pass']) ? '' : ':'.$parsed['pass']).'@') - .$parsed['host'] - .(empty($parsed['port']) ? '' : ':'.$parsed['port']) - .(empty($parsed['path']) ? '' : $parsed['path']) - .(empty($parsed['query']) ? '' : '?'.$parsed['query']) - .(empty($parsed['fragment']) ? '' : '#'.$parsed['fragment']); - } else { // parse_url seems to have failed, try without it - $arr = explode('.', $input); - foreach ($arr as $k => $v) { - $conv = $this->_decode($v); - $arr[$k] = ($conv) ? $conv : $v; - } - $return = join('.', $arr); - } - } else { // Otherwise we consider it being a pure domain name string - $return = $this->_decode($input); - if (!$return) $return = $input; - } - // The output is UTF-8 by default, other output formats need conversion here - // If one time encoding is given, use this, else the objects property - switch (($one_time_encoding) ? $one_time_encoding : $this->_api_encoding) { - case 'utf8': - return $return; - break; - case 'ucs4_string': - return $this->_ucs4_to_ucs4_string($this->_utf8_to_ucs4($return)); - break; - case 'ucs4_array': - return $this->_utf8_to_ucs4($return); - break; - default: - $this->_error('Unsupported output format'); - return false; - } - } - - /** - * Encode a given UTF-8 domain name - * @param string Domain name (UTF-8 or UCS-4) - * [@param string Desired input encoding, see {@link set_parameter}] - * @return string Encoded Domain name (ACE string) - * @access public - */ - function encode($decoded, $one_time_encoding = false) - { - // Forcing conversion of input to UCS4 array - // If one time encoding is given, use this, else the objects property - switch ($one_time_encoding ? $one_time_encoding : $this->_api_encoding) { - case 'utf8': - $decoded = $this->_utf8_to_ucs4($decoded); - break; - case 'ucs4_string': - $decoded = $this->_ucs4_string_to_ucs4($decoded); - case 'ucs4_array': - break; - default: - $this->_error('Unsupported input format: '.($one_time_encoding ? $one_time_encoding : $this->_api_encoding)); - return false; - } - - // No input, no output, what else did you expect? - if (empty($decoded)) return ''; - - // Anchors for iteration - $last_begin = 0; - // Output string - $output = ''; - foreach ($decoded as $k => $v) { - // Make sure to use just the plain dot - switch($v) { - case 0x3002: - case 0xFF0E: - case 0xFF61: - $decoded[$k] = 0x2E; - // Right, no break here, the above are converted to dots anyway - // Stumbling across an anchoring character - case 0x2E: - case 0x2F: - case 0x3A: - case 0x3F: - case 0x40: - // Neither email addresses nor URLs allowed in strict mode - if ($this->_strict_mode) { - $this->_error('Neither email addresses nor URLs are allowed in strict mode.'); - return false; - } else { - // Skip first char - if ($k) { - $encoded = ''; - $encoded = $this->_encode(array_slice($decoded, $last_begin, (($k)-$last_begin))); - if ($encoded) { - $output .= $encoded; - } else { - $output .= $this->_ucs4_to_utf8(array_slice($decoded, $last_begin, (($k)-$last_begin))); - } - $output .= chr($decoded[$k]); - } - $last_begin = $k + 1; - } - } - } - // Catch the rest of the string - if ($last_begin) { - $inp_len = sizeof($decoded); - $encoded = ''; - $encoded = $this->_encode(array_slice($decoded, $last_begin, (($inp_len)-$last_begin))); - if ($encoded) { - $output .= $encoded; - } else { - $output .= $this->_ucs4_to_utf8(array_slice($decoded, $last_begin, (($inp_len)-$last_begin))); - } - return $output; - } else { - if ($output = $this->_encode($decoded)) { - return $output; - } else { - return $this->_ucs4_to_utf8($decoded); - } - } - } - - /** - * Use this method to get the last error ocurred - * @param void - * @return string The last error, that occured - * @access public - */ - function get_last_error() - { - return $this->_error; - } - - /** - * The actual decoding algorithm - * @access private - */ - function _decode($encoded) - { - // We do need to find the Punycode prefix - if (!preg_match('!^'.preg_quote($this->_punycode_prefix, '!').'!', $encoded)) { - $this->_error('This is not a punycode string'); - return false; - } - $encode_test = preg_replace('!^'.preg_quote($this->_punycode_prefix, '!').'!', '', $encoded); - // If nothing left after removing the prefix, it is hopeless - if (!$encode_test) { - $this->_error('The given encoded string was empty'); - return false; - } - // Find last occurence of the delimiter - $delim_pos = strrpos($encoded, '-'); - if ($delim_pos > strlen($this->_punycode_prefix)) { - for ($k = strlen($this->_punycode_prefix); $k < $delim_pos; ++$k) { - $decoded[] = ord($encoded{$k}); - } - } else { - $decoded = array(); - } - $deco_len = count($decoded); - $enco_len = strlen($encoded); - - // Wandering through the strings; init - $is_first = true; - $bias = $this->_initial_bias; - $idx = 0; - $char = $this->_initial_n; - - for ($enco_idx = ($delim_pos) ? ($delim_pos + 1) : 0; $enco_idx < $enco_len; ++$deco_len) { - for ($old_idx = $idx, $w = 1, $k = $this->_base; 1 ; $k += $this->_base) { - $digit = $this->_decode_digit($encoded{$enco_idx++}); - $idx += $digit * $w; - $t = ($k <= $bias) ? $this->_tmin : - (($k >= $bias + $this->_tmax) ? $this->_tmax : ($k - $bias)); - if ($digit < $t) break; - $w = (int) ($w * ($this->_base - $t)); - } - $bias = $this->_adapt($idx - $old_idx, $deco_len + 1, $is_first); - $is_first = false; - $char += (int) ($idx / ($deco_len + 1)); - $idx %= ($deco_len + 1); - if ($deco_len > 0) { - // Make room for the decoded char - for ($i = $deco_len; $i > $idx; $i--) { - $decoded[$i] = $decoded[($i - 1)]; - } - } - $decoded[$idx++] = $char; - } - return $this->_ucs4_to_utf8($decoded); - } - - /** - * The actual encoding algorithm - * @access private - */ - function _encode($decoded) - { - // We cannot encode a domain name containing the Punycode prefix - $extract = strlen($this->_punycode_prefix); - $check_pref = $this->_utf8_to_ucs4($this->_punycode_prefix); - $check_deco = array_slice($decoded, 0, $extract); - - if ($check_pref == $check_deco) { - $this->_error('This is already a punycode string'); - return false; - } - // We will not try to encode strings consisting of basic code points only - $encodable = false; - foreach ($decoded as $k => $v) { - if ($v > 0x7a) { - $encodable = true; - break; - } - } - if (!$encodable) { - $this->_error('The given string does not contain encodable chars'); - return false; - } - - // Do NAMEPREP - $decoded = $this->_nameprep($decoded); - if (!$decoded || !is_array($decoded)) return false; // NAMEPREP failed - - $deco_len = count($decoded); - if (!$deco_len) return false; // Empty array - - $codecount = 0; // How many chars have been consumed - - $encoded = ''; - // Copy all basic code points to output - for ($i = 0; $i < $deco_len; ++$i) { - $test = $decoded[$i]; - // Will match [-0-9a-zA-Z] - if ((0x2F < $test && $test < 0x40) || (0x40 < $test && $test < 0x5B) - || (0x60 < $test && $test <= 0x7B) || (0x2D == $test)) { - $encoded .= chr($decoded[$i]); - $codecount++; - } - } - if ($codecount == $deco_len) return $encoded; // All codepoints were basic ones - - // Start with the prefix; copy it to output - $encoded = $this->_punycode_prefix.$encoded; - - // If we have basic code points in output, add an hyphen to the end - if ($codecount) $encoded .= '-'; - - // Now find and encode all non-basic code points - $is_first = true; - $cur_code = $this->_initial_n; - $bias = $this->_initial_bias; - $delta = 0; - while ($codecount < $deco_len) { - // Find the smallest code point >= the current code point and - // remember the last ouccrence of it in the input - for ($i = 0, $next_code = $this->_max_ucs; $i < $deco_len; $i++) { - if ($decoded[$i] >= $cur_code && $decoded[$i] <= $next_code) { - $next_code = $decoded[$i]; - } - } - - $delta += ($next_code - $cur_code) * ($codecount + 1); - $cur_code = $next_code; - - // Scan input again and encode all characters whose code point is $cur_code - for ($i = 0; $i < $deco_len; $i++) { - if ($decoded[$i] < $cur_code) { - $delta++; - } elseif ($decoded[$i] == $cur_code) { - for ($q = $delta, $k = $this->_base; 1; $k += $this->_base) { - $t = ($k <= $bias) ? $this->_tmin : - (($k >= $bias + $this->_tmax) ? $this->_tmax : $k - $bias); - if ($q < $t) break; - $encoded .= $this->_encode_digit(intval($t + (($q - $t) % ($this->_base - $t)))); //v0.4.5 Changed from ceil() to intval() - $q = (int) (($q - $t) / ($this->_base - $t)); - } - $encoded .= $this->_encode_digit($q); - $bias = $this->_adapt($delta, $codecount+1, $is_first); - $codecount++; - $delta = 0; - $is_first = false; - } - } - $delta++; - $cur_code++; - } - return $encoded; - } - - /** - * Adapt the bias according to the current code point and position - * @access private - */ - function _adapt($delta, $npoints, $is_first) - { - $delta = intval($is_first ? ($delta / $this->_damp) : ($delta / 2)); - $delta += intval($delta / $npoints); - for ($k = 0; $delta > (($this->_base - $this->_tmin) * $this->_tmax) / 2; $k += $this->_base) { - $delta = intval($delta / ($this->_base - $this->_tmin)); - } - return intval($k + ($this->_base - $this->_tmin + 1) * $delta / ($delta + $this->_skew)); - } - - /** - * Encoding a certain digit - * @access private - */ - function _encode_digit($d) - { - return chr($d + 22 + 75 * ($d < 26)); - } - - /** - * Decode a certain digit - * @access private - */ - function _decode_digit($cp) - { - $cp = ord($cp); - return ($cp - 48 < 10) ? $cp - 22 : (($cp - 65 < 26) ? $cp - 65 : (($cp - 97 < 26) ? $cp - 97 : $this->_base)); - } - - /** - * Internal error handling method - * @access private - */ - function _error($error = '') - { - $this->_error = $error; - } - - /** - * Do Nameprep according to RFC3491 and RFC3454 - * @param array Unicode Characters - * @return string Unicode Characters, Nameprep'd - * @access private - */ - function _nameprep($input) - { - $output = array(); - $error = false; - // - // Mapping - // Walking through the input array, performing the required steps on each of - // the input chars and putting the result into the output array - // While mapping required chars we apply the cannonical ordering - foreach ($input as $v) { - // Map to nothing == skip that code point - if (in_array($v, $this->NP['map_nothing'])) continue; - - // Try to find prohibited input - if (in_array($v, $this->NP['prohibit']) || in_array($v, $this->NP['general_prohibited'])) { - $this->_error('NAMEPREP: Prohibited input U+'.sprintf('%08X', $v)); - return false; - } - foreach ($this->NP['prohibit_ranges'] as $range) { - if ($range[0] <= $v && $v <= $range[1]) { - $this->_error('NAMEPREP: Prohibited input U+'.sprintf('%08X', $v)); - return false; - } - } - // - // Hangul syllable decomposition - if (0xAC00 <= $v && $v <= 0xD7AF) { - foreach ($this->_hangul_decompose($v) as $out) { - $output[] = (int) $out; - } - // There's a decomposition mapping for that code point - } elseif (isset($this->NP['replacemaps'][$v])) { - foreach ($this->_apply_cannonical_ordering($this->NP['replacemaps'][$v]) as $out) { - $output[] = (int) $out; - } - } else { - $output[] = (int) $v; - } - } - // Before applying any Combining, try to rearrange any Hangul syllables - $output = $this->_hangul_compose($output); - // - // Combine code points - // - $last_class = 0; - $last_starter = 0; - $out_len = count($output); - for ($i = 0; $i < $out_len; ++$i) { - $class = $this->_get_combining_class($output[$i]); - if ((!$last_class || $last_class > $class) && $class) { - // Try to match - $seq_len = $i - $last_starter; - $out = $this->_combine(array_slice($output, $last_starter, $seq_len)); - // On match: Replace the last starter with the composed character and remove - // the now redundant non-starter(s) - if ($out) { - $output[$last_starter] = $out; - if (count($out) != $seq_len) { - for ($j = $i+1; $j < $out_len; ++$j) { - $output[$j-1] = $output[$j]; - } - unset($output[$out_len]); - } - // Rewind the for loop by one, since there can be more possible compositions - $i--; - $out_len--; - $last_class = ($i == $last_starter) ? 0 : $this->_get_combining_class($output[$i-1]); - continue; - } - } - // The current class is 0 - if (!$class) $last_starter = $i; - $last_class = $class; - } - return $output; - } - - /** - * Decomposes a Hangul syllable - * (see http://www.unicode.org/unicode/reports/tr15/#Hangul - * @param integer 32bit UCS4 code point - * @return array Either Hangul Syllable decomposed or original 32bit value as one value array - * @access private - */ - function _hangul_decompose($char) - { - $sindex = (int) $char - $this->_sbase; - if ($sindex < 0 || $sindex >= $this->_scount) { - return array($char); - } - $result = array(); - $result[] = (int) $this->_lbase + $sindex / $this->_ncount; - $result[] = (int) $this->_vbase + ($sindex % $this->_ncount) / $this->_tcount; - $T = intval($this->_tbase + $sindex % $this->_tcount); - if ($T != $this->_tbase) $result[] = $T; - return $result; - } - /** - * Ccomposes a Hangul syllable - * (see http://www.unicode.org/unicode/reports/tr15/#Hangul - * @param array Decomposed UCS4 sequence - * @return array UCS4 sequence with syllables composed - * @access private - */ - function _hangul_compose($input) - { - $inp_len = count($input); - if (!$inp_len) return array(); - $result = array(); - $last = (int) $input[0]; - $result[] = $last; // copy first char from input to output - - for ($i = 1; $i < $inp_len; ++$i) { - $char = (int) $input[$i]; - $sindex = $last - $this->_sbase; - $lindex = $last - $this->_lbase; - $vindex = $char - $this->_vbase; - $tindex = $char - $this->_tbase; - // Find out, whether two current characters are LV and T - if (0 <= $sindex && $sindex < $this->_scount && ($sindex % $this->_tcount == 0) - && 0 <= $tindex && $tindex <= $this->_tcount) { - // create syllable of form LVT - $last += $tindex; - $result[(count($result) - 1)] = $last; // reset last - continue; // discard char - } - // Find out, whether two current characters form L and V - if (0 <= $lindex && $lindex < $this->_lcount && 0 <= $vindex && $vindex < $this->_vcount) { - // create syllable of form LV - $last = (int) $this->_sbase + ($lindex * $this->_vcount + $vindex) * $this->_tcount; - $result[(count($result) - 1)] = $last; // reset last - continue; // discard char - } - // if neither case was true, just add the character - $last = $char; - $result[] = $char; - } - return $result; - } - - /** - * Returns the combining class of a certain wide char - * @param integer Wide char to check (32bit integer) - * @return integer Combining class if found, else 0 - * @access private - */ - function _get_combining_class($char) - { - return isset($this->NP['norm_combcls'][$char]) ? $this->NP['norm_combcls'][$char] : 0; - } - - /** - * Apllies the cannonical ordering of a decomposed UCS4 sequence - * @param array Decomposed UCS4 sequence - * @return array Ordered USC4 sequence - * @access private - */ - function _apply_cannonical_ordering($input) - { - $swap = true; - $size = count($input); - while ($swap) { - $swap = false; - $last = $this->_get_combining_class(intval($input[0])); - for ($i = 0; $i < $size-1; ++$i) { - $next = $this->_get_combining_class(intval($input[$i+1])); - if ($next != 0 && $last > $next) { - // Move item leftward until it fits - for ($j = $i + 1; $j > 0; --$j) { - if ($this->_get_combining_class(intval($input[$j-1])) <= $next) break; - $t = intval($input[$j]); - $input[$j] = intval($input[$j-1]); - $input[$j-1] = $t; - $swap = true; - } - // Reentering the loop looking at the old character again - $next = $last; - } - $last = $next; - } - } - return $input; - } - - /** - * Do composition of a sequence of starter and non-starter - * @param array UCS4 Decomposed sequence - * @return array Ordered USC4 sequence - * @access private - */ - function _combine($input) - { - $inp_len = count($input); - foreach ($this->NP['replacemaps'] as $np_src => $np_target) { - if ($np_target[0] != $input[0]) continue; - if (count($np_target) != $inp_len) continue; - $hit = false; - foreach ($input as $k2 => $v2) { - if ($v2 == $np_target[$k2]) { - $hit = true; - } else { - $hit = false; - break; - } - } - if ($hit) return $np_src; - } - return false; - } - - /** - * This converts an UTF-8 encoded string to its UCS-4 representation - * By talking about UCS-4 "strings" we mean arrays of 32bit integers representing - * each of the "chars". This is due to PHP not being able to handle strings with - * bit depth different from 8. This apllies to the reverse method _ucs4_to_utf8(), too. - * The following UTF-8 encodings are supported: - * bytes bits representation - * 1 7 0xxxxxxx - * 2 11 110xxxxx 10xxxxxx - * 3 16 1110xxxx 10xxxxxx 10xxxxxx - * 4 21 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx - * 5 26 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx - * 6 31 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx - * Each x represents a bit that can be used to store character data. - * The five and six byte sequences are part of Annex D of ISO/IEC 10646-1:2000 - * @access private - */ - function _utf8_to_ucs4($input) - { - $output = array(); - $out_len = 0; - $inp_len = strlen($input); - $mode = 'next'; - $test = 'none'; - for ($k = 0; $k < $inp_len; ++$k) { - $v = ord($input{$k}); // Extract byte from input string - - if ($v < 128) { // We found an ASCII char - put into stirng as is - $output[$out_len] = $v; - ++$out_len; - if ('add' == $mode) { - $this->_error('Conversion from UTF-8 to UCS-4 failed: malformed input at byte '.$k); - return false; - } - continue; - } - if ('next' == $mode) { // Try to find the next start byte; determine the width of the Unicode char - $start_byte = $v; - $mode = 'add'; - $test = 'range'; - if ($v >> 5 == 6) { // &110xxxxx 10xxxxx - $next_byte = 0; // Tells, how many times subsequent bitmasks must rotate 6bits to the left - $v = ($v - 192) << 6; - } elseif ($v >> 4 == 14) { // &1110xxxx 10xxxxxx 10xxxxxx - $next_byte = 1; - $v = ($v - 224) << 12; - } elseif ($v >> 3 == 30) { // &11110xxx 10xxxxxx 10xxxxxx 10xxxxxx - $next_byte = 2; - $v = ($v - 240) << 18; - } elseif ($v >> 2 == 62) { // &111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx - $next_byte = 3; - $v = ($v - 248) << 24; - } elseif ($v >> 1 == 126) { // &1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx - $next_byte = 4; - $v = ($v - 252) << 30; - } else { - $this->_error('This might be UTF-8, but I don\'t understand it at byte '.$k); - return false; - } - if ('add' == $mode) { - $output[$out_len] = (int) $v; - ++$out_len; - continue; - } - } - if ('add' == $mode) { - if (!$this->_allow_overlong && $test == 'range') { - $test = 'none'; - if (($v < 0xA0 && $start_byte == 0xE0) || ($v < 0x90 && $start_byte == 0xF0) || ($v > 0x8F && $start_byte == 0xF4)) { - $this->_error('Bogus UTF-8 character detected (out of legal range) at byte '.$k); - return false; - } - } - if ($v >> 6 == 2) { // Bit mask must be 10xxxxxx - $v = ($v - 128) << ($next_byte * 6); - $output[($out_len - 1)] += $v; - --$next_byte; - } else { - $this->_error('Conversion from UTF-8 to UCS-4 failed: malformed input at byte '.$k); - return false; - } - if ($next_byte < 0) { - $mode = 'next'; - } - } - } // for - return $output; - } - - /** - * Convert UCS-4 string into UTF-8 string - * See _utf8_to_ucs4() for details - * @access private - */ - function _ucs4_to_utf8($input) - { - $output = ''; - $k = 0; - foreach ($input as $v) { - ++$k; - // $v = ord($v); - if ($v < 128) { // 7bit are transferred literally - $output .= chr($v); - } elseif ($v < (1 << 11)) { // 2 bytes - $output .= chr(192 + ($v >> 6)) . chr(128 + ($v & 63)); - } elseif ($v < (1 << 16)) { // 3 bytes - $output .= chr(224 + ($v >> 12)) . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); - } elseif ($v < (1 << 21)) { // 4 bytes - $output .= chr(240 + ($v >> 18)) . chr(128 + (($v >> 12) & 63)) - . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); - } elseif ($v < (1 << 26)) { // 5 bytes - $output .= chr(248 + ($v >> 24)) . chr(128 + (($v >> 18) & 63)) - . chr(128 + (($v >> 12) & 63)) . chr(128 + (($v >> 6) & 63)) - . chr(128 + ($v & 63)); - } elseif ($v < (1 << 31)) { // 6 bytes - $output .= chr(252 + ($v >> 30)) . chr(128 + (($v >> 24) & 63)) - . chr(128 + (($v >> 18) & 63)) . chr(128 + (($v >> 12) & 63)) - . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); - } else { - $this->_error('Conversion from UCS-4 to UTF-8 failed: malformed input at byte '.$k); - return false; - } - } - return $output; - } - - /** - * Convert UCS-4 array into UCS-4 string - * - * @access private - */ - function _ucs4_to_ucs4_string($input) - { - $output = ''; - // Take array values and split output to 4 bytes per value - // The bit mask is 255, which reads &11111111 - foreach ($input as $v) { - $output .= chr(($v >> 24) & 255).chr(($v >> 16) & 255).chr(($v >> 8) & 255).chr($v & 255); - } - return $output; - } - - /** - * Convert UCS-4 strin into UCS-4 garray - * - * @access private - */ - function _ucs4_string_to_ucs4($input) - { - $output = array(); - $inp_len = strlen($input); - // Input length must be dividable by 4 - if ($inp_len % 4) { - $this->_error('Input UCS4 string is broken'); - return false; - } - // Empty input - return empty output - if (!$inp_len) return $output; - for ($i = 0, $out_len = -1; $i < $inp_len; ++$i) { - // Increment output position every 4 input bytes - if (!($i % 4)) { - $out_len++; - $output[$out_len] = 0; - } - $output[$out_len] += ord($input{$i}) << (8 * (3 - ($i % 4) ) ); - } - return $output; - } -} - -/** -* Adapter class for aligning the API of idna_convert with that of Net_IDNA -* @author Matthias Sommerfeld <mso@phlylabs.de> -*/ -class Net_IDNA_php4 extends idna_convert -{ - /** - * Sets a new option value. Available options and values: - * [encoding - Use either UTF-8, UCS4 as array or UCS4 as string as input ('utf8' for UTF-8, - * 'ucs4_string' and 'ucs4_array' respectively for UCS4); The output is always UTF-8] - * [overlong - Unicode does not allow unnecessarily long encodings of chars, - * to allow this, set this parameter to true, else to false; - * default is false.] - * [strict - true: strict mode, good for registration purposes - Causes errors - * on failures; false: loose mode, ideal for "wildlife" applications - * by silently ignoring errors and returning the original input instead - * - * @param mixed Parameter to set (string: single parameter; array of Parameter => Value pairs) - * @param string Value to use (if parameter 1 is a string) - * @return boolean true on success, false otherwise - * @access public - */ - function setParams($option, $param = false) - { - return $this->IC->set_parameters($option, $param); - } -} - -?>
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