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<?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\CssSelector\Parser; /** * CSS selector reader. * * This component is a port of the Python cssselect library, * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. * * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> * * @internal */ class Reader { private $source; private $length; private $position = 0; public function __construct(string $source) { $this->source = $source; $this->length = \strlen($source); } public function isEOF(): bool { return $this->position >= $this->length; } public function getPosition(): int { return $this->position; } public function getRemainingLength(): int { return $this->length - $this->position; } public function getSubstring(int $length, int $offset = 0): string { return substr($this->source, $this->position + $offset, $length); } public function getOffset(string $string) { $position = strpos($this->source, $string, $this->position); return false === $position ? false : $position - $this->position; } /** * @return array|false */ public function findPattern(string $pattern) { $source = substr($this->source, $this->position); if (preg_match($pattern, $source, $matches)) { return $matches; } return false; } public function moveForward(int $length) { $this->position += $length; } public function moveToEnd() { $this->position = $this->length; } }