--- /dev/null
+<?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 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 $replacements = array(
+ '\\' => '\\',
+ '$' => '$',
+ 'n' => "\n",
+ 'r' => "\r",
+ 't' => "\t",
+ 'f' => "\f",
+ 'v' => "\v",
+ 'e' => "\x1B",
+ );
+
+ /**
+ * Parses a string token.
+ *
+ * @param string $str String token content
+ *
+ * @return string The parsed string
+ */
+ public static function parse($str)
+ {
+ $bLength = 0;
+ if ('b' === $str[0]) {
+ $bLength = 1;
+ }
+
+ if ('\'' === $str[$bLength]) {
+ return str_replace(
+ array('\\\\', '\\\''),
+ array('\\', '\''),
+ 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 null|string $quote Quote type
+ *
+ * @return string String with escape sequences parsed
+ */
+ public static function parseEscapeSequences($str, $quote)
+ {
+ 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})~',
+ array(__CLASS__, 'parseCallback'),
+ $str
+ );
+ }
+
+ private static function parseCallback($matches)
+ {
+ $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 $str String token content
+ *
+ * @return string Parsed string
+ */
+ public static function parseDocString($startToken, $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);
+ }
+}