Current File : //opt/cpanel/ea-wappspector/vendor/rector/rector/vendor/symfony/yaml/Unescaper.php
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace RectorPrefix202411\Symfony\Component\Yaml;
use RectorPrefix202411\Symfony\Component\Yaml\Exception\ParseException;
/**
* Unescaper encapsulates unescaping rules for single and double-quoted
* YAML strings.
*
* @author Matthew Lewinski <matthew@lewinski.org>
*
* @internal
*/
class Unescaper
{
/**
* Regex fragment that matches an escaped character in a double quoted string.
*/
public const REGEX_ESCAPED_CHARACTER = '\\\\(x[0-9a-fA-F]{2}|u[0-9a-fA-F]{4}|U[0-9a-fA-F]{8}|.)';
/**
* Unescapes a single quoted string.
*
* @param string $value A single quoted string
*/
public function unescapeSingleQuotedString(string $value) : string
{
return \str_replace('\'\'', '\'', $value);
}
/**
* Unescapes a double quoted string.
*
* @param string $value A double quoted string
*/
public function unescapeDoubleQuotedString(string $value) : string
{
$callback = function ($match) {
return $this->unescapeCharacter($match[0]);
};
// evaluate the string
return \preg_replace_callback('/' . self::REGEX_ESCAPED_CHARACTER . '/u', $callback, $value);
}
/**
* Unescapes a character that was found in a double-quoted string.
*
* @param string $value An escaped character
*/
private function unescapeCharacter(string $value) : string
{
switch ($value[1]) {
case '0':
return "\x00";
case 'a':
return "\x07";
case 'b':
return "\x08";
case 't':
return "\t";
case "\t":
return "\t";
case 'n':
return "\n";
case 'v':
return "\v";
case 'f':
return "\f";
case 'r':
return "\r";
case 'e':
return "\x1b";
case ' ':
return ' ';
case '"':
return '"';
case '/':
return '/';
case '\\':
return '\\';
case 'N':
return " ";
case '_':
return " ";
case 'L':
return " ";
case 'P':
return " ";
case 'x':
return self::utf8chr(\hexdec(\substr($value, 2, 2)));
case 'u':
return self::utf8chr(\hexdec(\substr($value, 2, 4)));
case 'U':
return self::utf8chr(\hexdec(\substr($value, 2, 8)));
default:
throw new ParseException(\sprintf('Found unknown escape character "%s".', $value));
}
}
/**
* Get the UTF-8 character for the given code point.
*/
private static function utf8chr(int $c) : string
{
if (0x80 > ($c %= 0x200000)) {
return \chr($c);
}
if (0x800 > $c) {
return \chr(0xc0 | $c >> 6) . \chr(0x80 | $c & 0x3f);
}
if (0x10000 > $c) {
return \chr(0xe0 | $c >> 12) . \chr(0x80 | $c >> 6 & 0x3f) . \chr(0x80 | $c & 0x3f);
}
return \chr(0xf0 | $c >> 18) . \chr(0x80 | $c >> 12 & 0x3f) . \chr(0x80 | $c >> 6 & 0x3f) . \chr(0x80 | $c & 0x3f);
}
}
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