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Direktori : /home2/selectio/www/limpiar.in.net/updates/vendor/setasign/fpdi/src/PdfParser/ |
Current File : /home2/selectio/www/limpiar.in.net/updates/vendor/setasign/fpdi/src/PdfParser/Tokenizer.php |
<?php /** * This file is part of FPDI * * @package setasign\Fpdi * @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com) * @license http://opensource.org/licenses/mit-license The MIT License */ namespace setasign\Fpdi\PdfParser; /** * A tokenizer class. */ class Tokenizer { /** * @var StreamReader */ protected $streamReader; /** * A token stack. * * @var string[] */ protected $stack = []; /** * Tokenizer constructor. * * @param StreamReader $streamReader */ public function __construct(StreamReader $streamReader) { $this->streamReader = $streamReader; } /** * Get the stream reader instance. * * @return StreamReader */ public function getStreamReader() { return $this->streamReader; } /** * Clear the token stack. */ public function clearStack() { $this->stack = []; } /** * Push a token onto the stack. * * @param string $token */ public function pushStack($token) { $this->stack[] = $token; } /** * Get next token. * * @return bool|string */ public function getNextToken() { $token = \array_pop($this->stack); if ($token !== null) { return $token; } if (($byte = $this->streamReader->readByte()) === false) { return false; } if (\in_array($byte, ["\x20", "\x0A", "\x0D", "\x0C", "\x09", "\x00"], true)) { if ($this->leapWhiteSpaces() === false) { return false; } $byte = $this->streamReader->readByte(); } switch ($byte) { case '/': case '[': case ']': case '(': case ')': case '{': case '}': case '<': case '>': return $byte; case '%': $this->streamReader->readLine(); return $this->getNextToken(); } /* This way is faster than checking single bytes. */ $bufferOffset = $this->streamReader->getOffset(); do { $lastBuffer = $this->streamReader->getBuffer(false); $pos = \strcspn( $lastBuffer, "\x00\x09\x0A\x0C\x0D\x20()<>[]{}/%", $bufferOffset ); } while ( // Break the loop if a delimiter or white space char is matched // in the current buffer or increase the buffers length $lastBuffer !== false && ( $bufferOffset + $pos === \strlen($lastBuffer) && $this->streamReader->increaseLength() ) ); $result = \substr($lastBuffer, $bufferOffset - 1, $pos + 1); $this->streamReader->setOffset($bufferOffset + $pos); return $result; } /** * Leap white spaces. * * @return boolean */ public function leapWhiteSpaces() { do { if (!$this->streamReader->ensureContent()) { return false; } $buffer = $this->streamReader->getBuffer(false); $matches = \strspn($buffer, "\x20\x0A\x0C\x0D\x09\x00", $this->streamReader->getOffset()); if ($matches > 0) { $this->streamReader->addOffset($matches); } } while ($this->streamReader->getOffset() >= $this->streamReader->getBufferLength()); return true; } }