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