742 lines
22 KiB
PHP
742 lines
22 KiB
PHP
<?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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const ERROR_ILLEGAL_CHARACTER = 'iconv(): Detected an illegal character in input string';
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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 = array(
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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 = array();
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private static $convertMap = array();
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private static $errorHandler;
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private static $lastError;
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private static $ulenMask = array("\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 = array();
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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]] = array($headers[$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 array(
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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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$pref = array();
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}
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$pref += array(
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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 = isset($chars[0]) ? $chars[0] : array();
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$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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$fieldValue = array();
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$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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? $c = preg_replace_callback(
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'/[=_\?\x00-\x1F\x80-\xFF]/',
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array(__CLASS__, 'qpByteCallback'),
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$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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$i += isset($ulenMask[$u]) ? $ulenMask[$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, $pos), 'utf-8') : 0));
|
|
}
|
|
|
|
public static function iconv_strrpos($haystack, $needle, $encoding = null)
|
|
{
|
|
if (null === $encoding) {
|
|
$encoding = self::$internalEncoding;
|
|
}
|
|
|
|
if (0 !== stripos($encoding, 'utf-8')) {
|
|
if (false === $haystack = self::iconv($encoding, 'utf-8', $haystack)) {
|
|
return false;
|
|
}
|
|
if (false === $needle = self::iconv($encoding, 'utf-8', $needle)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$pos = isset($needle[0]) ? strrpos($haystack, $needle) : false;
|
|
|
|
return false === $pos ? false : self::iconv_strlen($pos ? substr($haystack, 0, $pos) : $haystack, 'utf-8');
|
|
}
|
|
|
|
public static function iconv_substr($s, $start, $length = 2147483647, $encoding = null)
|
|
{
|
|
if (null === $encoding) {
|
|
$encoding = self::$internalEncoding;
|
|
}
|
|
if (0 !== stripos($encoding, 'utf-8')) {
|
|
$encoding = null;
|
|
} elseif (false === $s = self::iconv($encoding, 'utf-8', $s)) {
|
|
return false;
|
|
}
|
|
|
|
$s = (string) $s;
|
|
$slen = self::iconv_strlen($s, 'utf-8');
|
|
$start = (int) $start;
|
|
|
|
if (0 > $start) {
|
|
$start += $slen;
|
|
}
|
|
if (0 > $start) {
|
|
return false;
|
|
}
|
|
if ($start >= $slen) {
|
|
return false;
|
|
}
|
|
|
|
$rx = $slen - $start;
|
|
|
|
if (0 > $length) {
|
|
$length += $rx;
|
|
}
|
|
if (0 === $length) {
|
|
return '';
|
|
}
|
|
if (0 > $length) {
|
|
return false;
|
|
}
|
|
|
|
if ($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";
|
|
$ulen = isset($ulenMask[$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;
|
|
} else {
|
|
$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";
|
|
$ulen = isset($ulenMask[$ulen]) ? $ulenMask[$ulen] : 1;
|
|
$uchr = substr($str, $i, $ulen);
|
|
|
|
if ($ignore && (1 === $ulen || !($valid || preg_match('/^.$/us', $uchr)))) {
|
|
++$i;
|
|
continue;
|
|
} else {
|
|
$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 = array();
|
|
$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;
|
|
}
|
|
}
|