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<?php

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* This file is part of the Symfony package.

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* (c) Fabien Potencier <fabien@symfony.com>

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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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namespace Symfony\Polyfill\Iconv;

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/**

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* iconv implementation in pure PHP, UTF-8 centric.

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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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* 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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* @author Nicolas Grekas <p@tchwork.com>

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* @internal

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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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}

[371] Fix | Delete

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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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)

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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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}

[443] Fix | Delete

[444] Fix | Delete

public static function strlen1($s, $encoding = null)

[445] Fix | Delete

{

[446] Fix | Delete

if (null === $encoding) {

[447] Fix | Delete

$encoding = self::$internalEncoding;

[448] Fix | Delete

}

[449] Fix | Delete

if (0 !== stripos($encoding, 'utf-8') && false === $s = self::iconv($encoding, 'utf-8', $s)) {

[450] Fix | Delete

return false;

[451] Fix | Delete

}

[452] Fix | Delete

[453] Fix | Delete

return \strlen(utf8_decode($s));

[454] Fix | Delete

}

[455] Fix | Delete

[456] Fix | Delete

public static function strlen2($s, $encoding = null)

[457] Fix | Delete

{

[458] Fix | Delete

if (null === $encoding) {

[459] Fix | Delete

$encoding = self::$internalEncoding;

[460] Fix | Delete

}

[461] Fix | Delete

if (0 !== stripos($encoding, 'utf-8') && false === $s = self::iconv($encoding, 'utf-8', $s)) {

[462] Fix | Delete

return false;

[463] Fix | Delete

}

[464] Fix | Delete

[465] Fix | Delete

$ulenMask = self::$ulenMask;

[466] Fix | Delete

[467] Fix | Delete

$i = 0;

[468] Fix | Delete

$j = 0;

[469] Fix | Delete

$len = \strlen($s);

[470] Fix | Delete

[471] Fix | Delete

while ($i < $len) {

[472] Fix | Delete

$u = $s[$i] & "\xF0";

[473] Fix | Delete

$i += isset($ulenMask[$u]) ? $ulenMask[$u] : 1;

[474] Fix | Delete

++$j;

[475] Fix | Delete

}

[476] Fix | Delete

[477] Fix | Delete

return $j;

[478] Fix | Delete

}

[479] Fix | Delete

[480] Fix | Delete

public static function iconv_strpos($haystack, $needle, $offset = 0, $encoding = null)

[481] Fix | Delete

{

[482] Fix | Delete

if (null === $encoding) {

[483] Fix | Delete

$encoding = self::$internalEncoding;

[484] Fix | Delete

}

[485] Fix | Delete

[486] Fix | Delete

if (0 !== stripos($encoding, 'utf-8')) {

[487] Fix | Delete

if (false === $haystack = self::iconv($encoding, 'utf-8', $haystack)) {

[488] Fix | Delete

return false;

[489] Fix | Delete

}

[490] Fix | Delete

if (false === $needle = self::iconv($encoding, 'utf-8', $needle)) {

[491] Fix | Delete

return false;

[492] Fix | Delete

}

[493] Fix | Delete

}

[494] Fix | Delete

[495] Fix | Delete

if ($offset = (int) $offset) {

[496] Fix | Delete

$haystack = self::iconv_substr($haystack, $offset, 2147483647, 'utf-8');

[497] Fix | Delete

}

[498] Fix | Delete

$pos = strpos($haystack, $needle);

[499] Fix | Delete