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744 lines
22 KiB
744 lines
22 KiB
<?php |
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <fabien@symfony.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Symfony\Polyfill\Iconv; |
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/** |
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* iconv implementation in pure PHP, UTF-8 centric. |
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* |
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* Implemented: |
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* - iconv - Convert string to requested character encoding |
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* - iconv_mime_decode - Decodes a MIME header field |
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* - iconv_mime_decode_headers - Decodes multiple MIME header fields at once |
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* - iconv_get_encoding - Retrieve internal configuration variables of iconv extension |
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* - iconv_set_encoding - Set current setting for character encoding conversion |
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* - iconv_mime_encode - Composes a MIME header field |
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* - iconv_strlen - Returns the character count of string |
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* - iconv_strpos - Finds position of first occurrence of a needle within a haystack |
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* - iconv_strrpos - Finds the last occurrence of a needle within a haystack |
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* - iconv_substr - Cut out part of a string |
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* |
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* Charsets available for conversion are defined by files |
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* in the charset/ directory and by Iconv::$alias below. |
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* You're welcome to send back any addition you make. |
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* |
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* @author Nicolas Grekas <p@tchwork.com> |
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* |
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* @internal |
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*/ |
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final class Iconv |
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{ |
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public const ERROR_ILLEGAL_CHARACTER = 'iconv(): Detected an illegal character in input string'; |
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public const ERROR_WRONG_CHARSET = 'iconv(): Wrong charset, conversion from `%s\' to `%s\' is not allowed'; |
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public static $inputEncoding = 'utf-8'; |
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public static $outputEncoding = 'utf-8'; |
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public static $internalEncoding = 'utf-8'; |
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private static $alias = [ |
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'utf8' => 'utf-8', |
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'ascii' => 'us-ascii', |
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'tis-620' => 'iso-8859-11', |
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'cp1250' => 'windows-1250', |
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'cp1251' => 'windows-1251', |
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'cp1252' => 'windows-1252', |
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'cp1253' => 'windows-1253', |
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'cp1254' => 'windows-1254', |
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'cp1255' => 'windows-1255', |
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'cp1256' => 'windows-1256', |
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'cp1257' => 'windows-1257', |
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'cp1258' => 'windows-1258', |
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'shift-jis' => 'cp932', |
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'shift_jis' => 'cp932', |
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'latin1' => 'iso-8859-1', |
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'latin2' => 'iso-8859-2', |
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'latin3' => 'iso-8859-3', |
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'latin4' => 'iso-8859-4', |
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'latin5' => 'iso-8859-9', |
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'latin6' => 'iso-8859-10', |
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'latin7' => 'iso-8859-13', |
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'latin8' => 'iso-8859-14', |
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'latin9' => 'iso-8859-15', |
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'latin10' => 'iso-8859-16', |
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'iso8859-1' => 'iso-8859-1', |
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'iso8859-2' => 'iso-8859-2', |
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'iso8859-3' => 'iso-8859-3', |
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'iso8859-4' => 'iso-8859-4', |
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'iso8859-5' => 'iso-8859-5', |
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'iso8859-6' => 'iso-8859-6', |
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'iso8859-7' => 'iso-8859-7', |
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'iso8859-8' => 'iso-8859-8', |
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'iso8859-9' => 'iso-8859-9', |
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'iso8859-10' => 'iso-8859-10', |
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'iso8859-11' => 'iso-8859-11', |
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'iso8859-12' => 'iso-8859-12', |
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'iso8859-13' => 'iso-8859-13', |
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'iso8859-14' => 'iso-8859-14', |
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'iso8859-15' => 'iso-8859-15', |
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'iso8859-16' => 'iso-8859-16', |
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'iso_8859-1' => 'iso-8859-1', |
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'iso_8859-2' => 'iso-8859-2', |
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'iso_8859-3' => 'iso-8859-3', |
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'iso_8859-4' => 'iso-8859-4', |
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'iso_8859-5' => 'iso-8859-5', |
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'iso_8859-6' => 'iso-8859-6', |
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'iso_8859-7' => 'iso-8859-7', |
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'iso_8859-8' => 'iso-8859-8', |
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'iso_8859-9' => 'iso-8859-9', |
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'iso_8859-10' => 'iso-8859-10', |
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'iso_8859-11' => 'iso-8859-11', |
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'iso_8859-12' => 'iso-8859-12', |
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'iso_8859-13' => 'iso-8859-13', |
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'iso_8859-14' => 'iso-8859-14', |
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'iso_8859-15' => 'iso-8859-15', |
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'iso_8859-16' => 'iso-8859-16', |
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'iso88591' => 'iso-8859-1', |
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'iso88592' => 'iso-8859-2', |
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'iso88593' => 'iso-8859-3', |
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'iso88594' => 'iso-8859-4', |
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'iso88595' => 'iso-8859-5', |
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'iso88596' => 'iso-8859-6', |
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'iso88597' => 'iso-8859-7', |
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'iso88598' => 'iso-8859-8', |
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'iso88599' => 'iso-8859-9', |
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'iso885910' => 'iso-8859-10', |
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'iso885911' => 'iso-8859-11', |
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'iso885912' => 'iso-8859-12', |
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'iso885913' => 'iso-8859-13', |
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'iso885914' => 'iso-8859-14', |
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'iso885915' => 'iso-8859-15', |
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'iso885916' => 'iso-8859-16', |
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]; |
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private static $translitMap = []; |
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private static $convertMap = []; |
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private static $errorHandler; |
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private static $lastError; |
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private static $ulenMask = ["\xC0" => 2, "\xD0" => 2, "\xE0" => 3, "\xF0" => 4]; |
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private static $isValidUtf8; |
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public static function iconv($inCharset, $outCharset, $str) |
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{ |
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$str = (string) $str; |
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if ('' === $str) { |
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return ''; |
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} |
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// Prepare for //IGNORE and //TRANSLIT |
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$translit = $ignore = ''; |
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$outCharset = strtolower($outCharset); |
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$inCharset = strtolower($inCharset); |
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if ('' === $outCharset) { |
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$outCharset = 'iso-8859-1'; |
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} |
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if ('' === $inCharset) { |
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$inCharset = 'iso-8859-1'; |
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} |
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do { |
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$loop = false; |
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if ('//translit' === substr($outCharset, -10)) { |
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$loop = $translit = true; |
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$outCharset = substr($outCharset, 0, -10); |
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} |
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if ('//ignore' === substr($outCharset, -8)) { |
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$loop = $ignore = true; |
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$outCharset = substr($outCharset, 0, -8); |
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} |
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} while ($loop); |
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do { |
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$loop = false; |
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if ('//translit' === substr($inCharset, -10)) { |
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$loop = true; |
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$inCharset = substr($inCharset, 0, -10); |
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} |
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if ('//ignore' === substr($inCharset, -8)) { |
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$loop = true; |
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$inCharset = substr($inCharset, 0, -8); |
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} |
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} while ($loop); |
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if (isset(self::$alias[$inCharset])) { |
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$inCharset = self::$alias[$inCharset]; |
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} |
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if (isset(self::$alias[$outCharset])) { |
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$outCharset = self::$alias[$outCharset]; |
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} |
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// Load charset maps |
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if (('utf-8' !== $inCharset && !self::loadMap('from.', $inCharset, $inMap)) |
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|| ('utf-8' !== $outCharset && !self::loadMap('to.', $outCharset, $outMap))) { |
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trigger_error(sprintf(self::ERROR_WRONG_CHARSET, $inCharset, $outCharset)); |
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return false; |
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} |
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if ('utf-8' !== $inCharset) { |
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// Convert input to UTF-8 |
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$result = ''; |
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if (self::mapToUtf8($result, $inMap, $str, $ignore)) { |
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$str = $result; |
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} else { |
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$str = false; |
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} |
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self::$isValidUtf8 = true; |
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} else { |
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self::$isValidUtf8 = preg_match('//u', $str); |
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if (!self::$isValidUtf8 && !$ignore) { |
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trigger_error(self::ERROR_ILLEGAL_CHARACTER); |
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return false; |
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} |
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if ('utf-8' === $outCharset) { |
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// UTF-8 validation |
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$str = self::utf8ToUtf8($str, $ignore); |
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} |
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} |
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if ('utf-8' !== $outCharset && false !== $str) { |
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// Convert output to UTF-8 |
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$result = ''; |
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if (self::mapFromUtf8($result, $outMap, $str, $ignore, $translit)) { |
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return $result; |
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} |
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return false; |
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} |
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return $str; |
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} |
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public static function iconv_mime_decode_headers($str, $mode = 0, $charset = null) |
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{ |
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if (null === $charset) { |
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$charset = self::$internalEncoding; |
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} |
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if (false !== strpos($str, "\r")) { |
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$str = strtr(str_replace("\r\n", "\n", $str), "\r", "\n"); |
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} |
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$str = explode("\n\n", $str, 2); |
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$headers = []; |
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$str = preg_split('/\n(?![ \t])/', $str[0]); |
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foreach ($str as $str) { |
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$str = self::iconv_mime_decode($str, $mode, $charset); |
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if (false === $str) { |
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return false; |
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} |
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$str = explode(':', $str, 2); |
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if (2 === \count($str)) { |
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if (isset($headers[$str[0]])) { |
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if (!\is_array($headers[$str[0]])) { |
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$headers[$str[0]] = [$headers[$str[0]]]; |
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} |
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$headers[$str[0]][] = ltrim($str[1]); |
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} else { |
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$headers[$str[0]] = ltrim($str[1]); |
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} |
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} |
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} |
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return $headers; |
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} |
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public static function iconv_mime_decode($str, $mode = 0, $charset = null) |
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{ |
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if (null === $charset) { |
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$charset = self::$internalEncoding; |
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} |
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if (\ICONV_MIME_DECODE_CONTINUE_ON_ERROR & $mode) { |
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$charset .= '//IGNORE'; |
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} |
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if (false !== strpos($str, "\r")) { |
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$str = strtr(str_replace("\r\n", "\n", $str), "\r", "\n"); |
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} |
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$str = preg_split('/\n(?![ \t])/', rtrim($str), 2); |
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$str = preg_replace('/[ \t]*\n[ \t]+/', ' ', rtrim($str[0])); |
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$str = preg_split('/=\?([^?]+)\?([bqBQ])\?(.*?)\?=/', $str, -1, \PREG_SPLIT_DELIM_CAPTURE); |
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$result = self::iconv('utf-8', $charset, $str[0]); |
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if (false === $result) { |
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return false; |
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} |
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$i = 1; |
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$len = \count($str); |
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while ($i < $len) { |
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$c = strtolower($str[$i]); |
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if ((\ICONV_MIME_DECODE_CONTINUE_ON_ERROR & $mode) |
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&& 'utf-8' !== $c |
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&& !isset(self::$alias[$c]) |
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&& !self::loadMap('from.', $c, $d)) { |
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$d = false; |
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} elseif ('B' === strtoupper($str[$i + 1])) { |
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$d = base64_decode($str[$i + 2]); |
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} else { |
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$d = rawurldecode(strtr(str_replace('%', '%25', $str[$i + 2]), '=_', '% ')); |
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} |
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if (false !== $d) { |
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if ('' !== $d) { |
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if ('' === $d = self::iconv($c, $charset, $d)) { |
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$str[$i + 3] = substr($str[$i + 3], 1); |
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} else { |
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$result .= $d; |
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} |
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} |
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$d = self::iconv('utf-8', $charset, $str[$i + 3]); |
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if ('' !== trim($d)) { |
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$result .= $d; |
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} |
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} elseif (\ICONV_MIME_DECODE_CONTINUE_ON_ERROR & $mode) { |
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$result .= "=?{$str[$i]}?{$str[$i + 1]}?{$str[$i + 2]}?={$str[$i + 3]}"; |
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} else { |
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$result = false; |
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break; |
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} |
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$i += 4; |
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} |
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return $result; |
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} |
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public static function iconv_get_encoding($type = 'all') |
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{ |
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switch ($type) { |
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case 'input_encoding': return self::$inputEncoding; |
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case 'output_encoding': return self::$outputEncoding; |
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case 'internal_encoding': return self::$internalEncoding; |
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} |
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return [ |
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'input_encoding' => self::$inputEncoding, |
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'output_encoding' => self::$outputEncoding, |
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'internal_encoding' => self::$internalEncoding, |
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]; |
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} |
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public static function iconv_set_encoding($type, $charset) |
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{ |
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switch ($type) { |
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case 'input_encoding': self::$inputEncoding = $charset; break; |
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case 'output_encoding': self::$outputEncoding = $charset; break; |
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case 'internal_encoding': self::$internalEncoding = $charset; break; |
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default: return false; |
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} |
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return true; |
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} |
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public static function iconv_mime_encode($fieldName, $fieldValue, $pref = null) |
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{ |
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if (!\is_array($pref)) { |
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$pref = []; |
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} |
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$pref += [ |
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'scheme' => 'B', |
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'input-charset' => self::$internalEncoding, |
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'output-charset' => self::$internalEncoding, |
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'line-length' => 76, |
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'line-break-chars' => "\r\n", |
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]; |
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if (preg_match('/[\x80-\xFF]/', $fieldName)) { |
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$fieldName = ''; |
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} |
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$scheme = strtoupper(substr($pref['scheme'], 0, 1)); |
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$in = strtolower($pref['input-charset']); |
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$out = strtolower($pref['output-charset']); |
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if ('utf-8' !== $in && false === $fieldValue = self::iconv($in, 'utf-8', $fieldValue)) { |
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return false; |
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} |
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preg_match_all('/./us', $fieldValue, $chars); |
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$chars = $chars[0] ?? []; |
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$lineBreak = (int) $pref['line-length']; |
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$lineStart = "=?{$pref['output-charset']}?{$scheme}?"; |
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$lineLength = \strlen($fieldName) + 2 + \strlen($lineStart) + 2; |
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$lineOffset = \strlen($lineStart) + 3; |
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$lineData = ''; |
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$fieldValue = []; |
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$Q = 'Q' === $scheme; |
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foreach ($chars as $c) { |
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if ('utf-8' !== $out && false === $c = self::iconv('utf-8', $out, $c)) { |
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return false; |
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} |
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$o = $Q |
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? $c = preg_replace_callback( |
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'/[=_\?\x00-\x1F\x80-\xFF]/', |
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[__CLASS__, 'qpByteCallback'], |
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$c |
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) |
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: base64_encode($lineData.$c); |
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if (isset($o[$lineBreak - $lineLength])) { |
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if (!$Q) { |
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$lineData = base64_encode($lineData); |
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} |
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$fieldValue[] = $lineStart.$lineData.'?='; |
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$lineLength = $lineOffset; |
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$lineData = ''; |
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} |
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$lineData .= $c; |
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$Q && $lineLength += \strlen($c); |
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} |
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if ('' !== $lineData) { |
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if (!$Q) { |
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$lineData = base64_encode($lineData); |
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} |
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$fieldValue[] = $lineStart.$lineData.'?='; |
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} |
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return $fieldName.': '.implode($pref['line-break-chars'].' ', $fieldValue); |
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} |
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public static function iconv_strlen($s, $encoding = null) |
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{ |
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static $hasXml = null; |
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if (null === $hasXml) { |
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$hasXml = \extension_loaded('xml'); |
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} |
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if ($hasXml) { |
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return self::strlen1($s, $encoding); |
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} |
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return self::strlen2($s, $encoding); |
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} |
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public static function strlen1($s, $encoding = null) |
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{ |
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if (null === $encoding) { |
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$encoding = self::$internalEncoding; |
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} |
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if (0 !== stripos($encoding, 'utf-8') && false === $s = self::iconv($encoding, 'utf-8', $s)) { |
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return false; |
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} |
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return \strlen(utf8_decode($s)); |
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} |
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public static function strlen2($s, $encoding = null) |
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{ |
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if (null === $encoding) { |
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$encoding = self::$internalEncoding; |
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} |
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if (0 !== stripos($encoding, 'utf-8') && false === $s = self::iconv($encoding, 'utf-8', $s)) { |
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return false; |
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} |
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$ulenMask = self::$ulenMask; |
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$i = 0; |
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$j = 0; |
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$len = \strlen($s); |
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while ($i < $len) { |
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$u = $s[$i] & "\xF0"; |
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$i += $ulenMask[$u] ?? 1; |
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++$j; |
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} |
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return $j; |
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} |
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public static function iconv_strpos($haystack, $needle, $offset = 0, $encoding = null) |
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{ |
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if (null === $encoding) { |
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$encoding = self::$internalEncoding; |
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} |
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if (0 !== stripos($encoding, 'utf-8')) { |
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if (false === $haystack = self::iconv($encoding, 'utf-8', $haystack)) { |
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return false; |
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} |
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if (false === $needle = self::iconv($encoding, 'utf-8', $needle)) { |
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return false; |
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} |
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} |
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if ($offset = (int) $offset) { |
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$haystack = self::iconv_substr($haystack, $offset, 2147483647, 'utf-8'); |
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} |
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$pos = strpos($haystack, $needle); |
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return false === $pos ? false : ($offset + ($pos ? self::iconv_strlen(substr($haystack, 0, $pos), 'utf-8') : 0)); |
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} |
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public static function iconv_strrpos($haystack, $needle, $encoding = null) |
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{ |
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if (null === $encoding) { |
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$encoding = self::$internalEncoding; |
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} |
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if (0 !== stripos($encoding, 'utf-8')) { |
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if (false === $haystack = self::iconv($encoding, 'utf-8', $haystack)) { |
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return false; |
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} |
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if (false === $needle = self::iconv($encoding, 'utf-8', $needle)) { |
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return false; |
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} |
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} |
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$pos = isset($needle[0]) ? strrpos($haystack, $needle) : false; |
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return false === $pos ? false : self::iconv_strlen($pos ? substr($haystack, 0, $pos) : $haystack, 'utf-8'); |
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} |
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public static function iconv_substr($s, $start, $length = 2147483647, $encoding = null) |
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{ |
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if (null === $encoding) { |
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$encoding = self::$internalEncoding; |
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} |
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if (0 !== stripos($encoding, 'utf-8')) { |
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$encoding = null; |
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} elseif (false === $s = self::iconv($encoding, 'utf-8', $s)) { |
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return false; |
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} |
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$s = (string) $s; |
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$slen = self::iconv_strlen($s, 'utf-8'); |
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$start = (int) $start; |
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if (0 > $start) { |
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$start += $slen; |
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} |
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if (0 > $start) { |
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if (\PHP_VERSION_ID < 80000) { |
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return false; |
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} |
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$start = 0; |
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} |
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if ($start >= $slen) { |
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return \PHP_VERSION_ID >= 80000 ? '' : false; |
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} |
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$rx = $slen - $start; |
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if (0 > $length) { |
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$length += $rx; |
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} |
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if (0 === $length) { |
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return ''; |
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} |
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if (0 > $length) { |
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return \PHP_VERSION_ID >= 80000 ? '' : false; |
|
} |
|
|
|
if ($length > $rx) { |
|
$length = $rx; |
|
} |
|
|
|
$rx = '/^'.($start ? self::pregOffset($start) : '').'('.self::pregOffset($length).')/u'; |
|
|
|
$s = preg_match($rx, $s, $s) ? $s[1] : ''; |
|
|
|
if (null === $encoding) { |
|
return $s; |
|
} |
|
|
|
return self::iconv('utf-8', $encoding, $s); |
|
} |
|
|
|
private static function loadMap($type, $charset, &$map) |
|
{ |
|
if (!isset(self::$convertMap[$type.$charset])) { |
|
if (false === $map = self::getData($type.$charset)) { |
|
if ('to.' === $type && self::loadMap('from.', $charset, $map)) { |
|
$map = array_flip($map); |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
self::$convertMap[$type.$charset] = $map; |
|
} else { |
|
$map = self::$convertMap[$type.$charset]; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
private static function utf8ToUtf8($str, $ignore) |
|
{ |
|
$ulenMask = self::$ulenMask; |
|
$valid = self::$isValidUtf8; |
|
|
|
$u = $str; |
|
$i = $j = 0; |
|
$len = \strlen($str); |
|
|
|
while ($i < $len) { |
|
if ($str[$i] < "\x80") { |
|
$u[$j++] = $str[$i++]; |
|
} else { |
|
$ulen = $str[$i] & "\xF0"; |
|
$ulen = $ulenMask[$ulen] ?? 1; |
|
$uchr = substr($str, $i, $ulen); |
|
|
|
if (1 === $ulen || !($valid || preg_match('/^.$/us', $uchr))) { |
|
if ($ignore) { |
|
++$i; |
|
continue; |
|
} |
|
|
|
trigger_error(self::ERROR_ILLEGAL_CHARACTER); |
|
|
|
return false; |
|
} |
|
|
|
$i += $ulen; |
|
|
|
$u[$j++] = $uchr[0]; |
|
|
|
isset($uchr[1]) && 0 !== ($u[$j++] = $uchr[1]) |
|
&& isset($uchr[2]) && 0 !== ($u[$j++] = $uchr[2]) |
|
&& isset($uchr[3]) && 0 !== ($u[$j++] = $uchr[3]); |
|
} |
|
} |
|
|
|
return substr($u, 0, $j); |
|
} |
|
|
|
private static function mapToUtf8(&$result, array $map, $str, $ignore) |
|
{ |
|
$len = \strlen($str); |
|
for ($i = 0; $i < $len; ++$i) { |
|
if (isset($str[$i + 1], $map[$str[$i].$str[$i + 1]])) { |
|
$result .= $map[$str[$i].$str[++$i]]; |
|
} elseif (isset($map[$str[$i]])) { |
|
$result .= $map[$str[$i]]; |
|
} elseif (!$ignore) { |
|
trigger_error(self::ERROR_ILLEGAL_CHARACTER); |
|
|
|
return false; |
|
} |
|
} |
|
|
|
return true; |
|
} |
|
|
|
private static function mapFromUtf8(&$result, array $map, $str, $ignore, $translit) |
|
{ |
|
$ulenMask = self::$ulenMask; |
|
$valid = self::$isValidUtf8; |
|
|
|
if ($translit && !self::$translitMap) { |
|
self::$translitMap = self::getData('translit'); |
|
} |
|
|
|
$i = 0; |
|
$len = \strlen($str); |
|
|
|
while ($i < $len) { |
|
if ($str[$i] < "\x80") { |
|
$uchr = $str[$i++]; |
|
} else { |
|
$ulen = $str[$i] & "\xF0"; |
|
$ulen = $ulenMask[$ulen] ?? 1; |
|
$uchr = substr($str, $i, $ulen); |
|
|
|
if ($ignore && (1 === $ulen || !($valid || preg_match('/^.$/us', $uchr)))) { |
|
++$i; |
|
continue; |
|
} |
|
|
|
$i += $ulen; |
|
} |
|
|
|
if (isset($map[$uchr])) { |
|
$result .= $map[$uchr]; |
|
} elseif ($translit) { |
|
if (isset(self::$translitMap[$uchr])) { |
|
$uchr = self::$translitMap[$uchr]; |
|
} elseif ($uchr >= "\xC3\x80") { |
|
$uchr = \Normalizer::normalize($uchr, \Normalizer::NFD); |
|
|
|
if ($uchr[0] < "\x80") { |
|
$uchr = $uchr[0]; |
|
} elseif ($ignore) { |
|
continue; |
|
} else { |
|
return false; |
|
} |
|
} elseif ($ignore) { |
|
continue; |
|
} else { |
|
return false; |
|
} |
|
|
|
$str = $uchr.substr($str, $i); |
|
$len = \strlen($str); |
|
$i = 0; |
|
} elseif (!$ignore) { |
|
return false; |
|
} |
|
} |
|
|
|
return true; |
|
} |
|
|
|
private static function qpByteCallback(array $m) |
|
{ |
|
return '='.strtoupper(dechex(\ord($m[0]))); |
|
} |
|
|
|
private static function pregOffset($offset) |
|
{ |
|
$rx = []; |
|
$offset = (int) $offset; |
|
|
|
while ($offset > 65535) { |
|
$rx[] = '.{65535}'; |
|
$offset -= 65535; |
|
} |
|
|
|
return implode('', $rx).'.{'.$offset.'}'; |
|
} |
|
|
|
private static function getData($file) |
|
{ |
|
if (file_exists($file = __DIR__.'/Resources/charset/'.$file.'.php')) { |
|
return require $file; |
|
} |
|
|
|
return false; |
|
} |
|
}
|
|
|