<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Translation\Extractor;
/*
* The following is derived from code at http://github.com/nikic/PHP-Parser
*
* Copyright (c) 2011 by Nikita Popov
*
* Some rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* * The names of the contributors may not be used to endorse or
* promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
class PhpStringTokenParser
{
protected static $replacements = [
'\\' => '\\',
'$' => '$',
'n' => "\n",
'r' => "\r",
't' => "\t",
'f' => "\f",
'v' => "\v",
'e' => "\x1B",
];
/**
* Parses a string token.
*
* @param string $str String token content
*
* @return string The parsed string
*/
public static function parse(string $str)
{
$bLength = 0;
if ('b' === $str[0]) {
$bLength = 1;
}
if ('\'' === $str[$bLength]) {
return str_replace(
['\\\\', '\\\''],
['\\', '\''],
substr($str, $bLength + 1, -1)
);
} else {
return self::parseEscapeSequences(substr($str, $bLength + 1, -1), '"');
}
}
/**
* Parses escape sequences in strings (all string types apart from single quoted).
*
* @param string $str String without quotes
* @param string|null $quote Quote type
*
* @return string String with escape sequences parsed
*/
public static function parseEscapeSequences(string $str, string $quote = null)
{
if (null !== $quote) {
$str = str_replace('\\'.$quote, $quote, $str);
}
return preg_replace_callback(
'~\\\\([\\\\$nrtfve]|[xX][0-9a-fA-F]{1,2}|[0-7]{1,3})~',
[__CLASS__, 'parseCallback'],
$str
);
}
private static function parseCallback(array $matches): string
{
$str = $matches[1];
if (isset(self::$replacements[$str])) {
return self::$replacements[$str];
} elseif ('x' === $str[0] || 'X' === $str[0]) {
return \chr(hexdec($str));
} else {
return \chr(octdec($str));
}
}
/**
* Parses a constant doc string.
*
* @param string $startToken Doc string start token content (<<<SMTHG)
* @param string $str String token content
*
* @return string Parsed string
*/
public static function parseDocString(string $startToken, string $str)
{
// strip last newline (thanks tokenizer for sticking it into the string!)
$str = preg_replace('~(\r\n|\n|\r)$~', '', $str);
// nowdoc string
if (false !== strpos($startToken, '\'')) {
return $str;
}
return self::parseEscapeSequences($str, null);
}
}