--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Pdf/Parser.php Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,472 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category Zend
+ * @package Zend_Pdf
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ * @version $Id: Parser.php 23395 2010-11-19 15:30:47Z alexander $
+ */
+
+/** Internally used classes */
+require_once 'Zend/Pdf/Element.php';
+require_once 'Zend/Pdf/Element/Numeric.php';
+
+
+/** Zend_Pdf_StringParser */
+require_once 'Zend/Pdf/StringParser.php';
+
+
+/**
+ * PDF file parser
+ *
+ * @package Zend_Pdf
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Zend_Pdf_Parser
+{
+ /**
+ * String parser
+ *
+ * @var Zend_Pdf_StringParser
+ */
+ private $_stringParser;
+
+ /**
+ * Last PDF file trailer
+ *
+ * @var Zend_Pdf_Trailer_Keeper
+ */
+ private $_trailer;
+
+ /**
+ * PDF version specified in the file header
+ *
+ * @var string
+ */
+ private $_pdfVersion;
+
+
+ /**
+ * Get length of source PDF
+ *
+ * @return integer
+ */
+ public function getPDFLength()
+ {
+ return strlen($this->_stringParser->data);
+ }
+
+ /**
+ * Get PDF String
+ *
+ * @return string
+ */
+ public function getPDFString()
+ {
+ return $this->_stringParser->data;
+ }
+
+ /**
+ * PDF version specified in the file header
+ *
+ * @return string
+ */
+ public function getPDFVersion()
+ {
+ return $this->_pdfVersion;
+ }
+
+ /**
+ * Load XReference table and referenced objects
+ *
+ * @param integer $offset
+ * @throws Zend_Pdf_Exception
+ * @return Zend_Pdf_Trailer_Keeper
+ */
+ private function _loadXRefTable($offset)
+ {
+ $this->_stringParser->offset = $offset;
+
+ require_once 'Zend/Pdf/Element/Reference/Table.php';
+ $refTable = new Zend_Pdf_Element_Reference_Table();
+ require_once 'Zend/Pdf/Element/Reference/Context.php';
+ $context = new Zend_Pdf_Element_Reference_Context($this->_stringParser, $refTable);
+ $this->_stringParser->setContext($context);
+
+ $nextLexeme = $this->_stringParser->readLexeme();
+ if ($nextLexeme == 'xref') {
+ /**
+ * Common cross-reference table
+ */
+ $this->_stringParser->skipWhiteSpace();
+ while ( ($nextLexeme = $this->_stringParser->readLexeme()) != 'trailer' ) {
+ if (!ctype_digit($nextLexeme)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Cross-reference table subheader values must contain only digits.', $this->_stringParser->offset-strlen($nextLexeme)));
+ }
+ $objNum = (int)$nextLexeme;
+
+ $refCount = $this->_stringParser->readLexeme();
+ if (!ctype_digit($refCount)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Cross-reference table subheader values must contain only digits.', $this->_stringParser->offset-strlen($refCount)));
+ }
+
+ $this->_stringParser->skipWhiteSpace();
+ while ($refCount > 0) {
+ $objectOffset = substr($this->_stringParser->data, $this->_stringParser->offset, 10);
+ if (!ctype_digit($objectOffset)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file cross-reference table syntax error. Offset - 0x%X. Offset must contain only digits.', $this->_stringParser->offset));
+ }
+ // Force $objectOffset to be treated as decimal instead of octal number
+ for ($numStart = 0; $numStart < strlen($objectOffset)-1; $numStart++) {
+ if ($objectOffset[$numStart] != '0') {
+ break;
+ }
+ }
+ $objectOffset = substr($objectOffset, $numStart);
+ $this->_stringParser->offset += 10;
+
+ if (strpos("\x00\t\n\f\r ", $this->_stringParser->data[$this->_stringParser->offset]) === false) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file cross-reference table syntax error. Offset - 0x%X. Value separator must be white space.', $this->_stringParser->offset));
+ }
+ $this->_stringParser->offset++;
+
+ $genNumber = substr($this->_stringParser->data, $this->_stringParser->offset, 5);
+ if (!ctype_digit($objectOffset)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file cross-reference table syntax error. Offset - 0x%X. Offset must contain only digits.', $this->_stringParser->offset));
+ }
+ // Force $objectOffset to be treated as decimal instead of octal number
+ for ($numStart = 0; $numStart < strlen($genNumber)-1; $numStart++) {
+ if ($genNumber[$numStart] != '0') {
+ break;
+ }
+ }
+ $genNumber = substr($genNumber, $numStart);
+ $this->_stringParser->offset += 5;
+
+ if (strpos("\x00\t\n\f\r ", $this->_stringParser->data[$this->_stringParser->offset]) === false) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file cross-reference table syntax error. Offset - 0x%X. Value separator must be white space.', $this->_stringParser->offset));
+ }
+ $this->_stringParser->offset++;
+
+ $inUseKey = $this->_stringParser->data[$this->_stringParser->offset];
+ $this->_stringParser->offset++;
+
+ switch ($inUseKey) {
+ case 'f':
+ // free entry
+ unset( $this->_refTable[$objNum . ' ' . $genNumber . ' R'] );
+ $refTable->addReference($objNum . ' ' . $genNumber . ' R',
+ $objectOffset,
+ false);
+ break;
+
+ case 'n':
+ // in-use entry
+
+ $refTable->addReference($objNum . ' ' . $genNumber . ' R',
+ $objectOffset,
+ true);
+ }
+
+ if ( !Zend_Pdf_StringParser::isWhiteSpace(ord( $this->_stringParser->data[$this->_stringParser->offset] )) ) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file cross-reference table syntax error. Offset - 0x%X. Value separator must be white space.', $this->_stringParser->offset));
+ }
+ $this->_stringParser->offset++;
+ if ( !Zend_Pdf_StringParser::isWhiteSpace(ord( $this->_stringParser->data[$this->_stringParser->offset] )) ) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file cross-reference table syntax error. Offset - 0x%X. Value separator must be white space.', $this->_stringParser->offset));
+ }
+ $this->_stringParser->offset++;
+
+ $refCount--;
+ $objNum++;
+ }
+ }
+
+ $trailerDictOffset = $this->_stringParser->offset;
+ $trailerDict = $this->_stringParser->readElement();
+ if (!$trailerDict instanceof Zend_Pdf_Element_Dictionary) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Dictionary expected after \'trailer\' keyword.', $trailerDictOffset));
+ }
+ } else {
+ $xrefStream = $this->_stringParser->getObject($offset, $context);
+
+ if (!$xrefStream instanceof Zend_Pdf_Element_Object_Stream) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Cross-reference stream expected.', $offset));
+ }
+
+ $trailerDict = $xrefStream->dictionary;
+ if ($trailerDict->Type->value != 'XRef') {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Cross-reference stream object must have /Type property assigned to /XRef.', $offset));
+ }
+ if ($trailerDict->W === null || $trailerDict->W->getType() != Zend_Pdf_Element::TYPE_ARRAY) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Cross reference stream dictionary doesn\'t have W entry or it\'s not an array.', $offset));
+ }
+
+ $entryField1Size = $trailerDict->W->items[0]->value;
+ $entryField2Size = $trailerDict->W->items[1]->value;
+ $entryField3Size = $trailerDict->W->items[2]->value;
+
+ if ($entryField2Size == 0 || $entryField3Size == 0) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Wrong W dictionary entry. Only type field of stream entries has default value and could be zero length.', $offset));
+ }
+
+ $xrefStreamData = $xrefStream->value;
+
+ if ($trailerDict->Index !== null) {
+ if ($trailerDict->Index->getType() != Zend_Pdf_Element::TYPE_ARRAY) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Cross reference stream dictionary Index entry must be an array.', $offset));
+ }
+ $sections = count($trailerDict->Index->items)/2;
+ } else {
+ $sections = 1;
+ }
+
+ $streamOffset = 0;
+
+ $size = $entryField1Size + $entryField2Size + $entryField3Size;
+ $entries = strlen($xrefStreamData)/$size;
+
+ for ($count = 0; $count < $sections; $count++) {
+ if ($trailerDict->Index !== null) {
+ $objNum = $trailerDict->Index->items[$count*2 ]->value;
+ $entries = $trailerDict->Index->items[$count*2 + 1]->value;
+ } else {
+ $objNum = 0;
+ $entries = $trailerDict->Size->value;
+ }
+
+ for ($count2 = 0; $count2 < $entries; $count2++) {
+ if ($entryField1Size == 0) {
+ $type = 1;
+ } else if ($entryField1Size == 1) { // Optimyze one-byte field case
+ $type = ord($xrefStreamData[$streamOffset++]);
+ } else {
+ $type = Zend_Pdf_StringParser::parseIntFromStream($xrefStreamData, $streamOffset, $entryField1Size);
+ $streamOffset += $entryField1Size;
+ }
+
+ if ($entryField2Size == 1) { // Optimyze one-byte field case
+ $field2 = ord($xrefStreamData[$streamOffset++]);
+ } else {
+ $field2 = Zend_Pdf_StringParser::parseIntFromStream($xrefStreamData, $streamOffset, $entryField2Size);
+ $streamOffset += $entryField2Size;
+ }
+
+ if ($entryField3Size == 1) { // Optimyze one-byte field case
+ $field3 = ord($xrefStreamData[$streamOffset++]);
+ } else {
+ $field3 = Zend_Pdf_StringParser::parseIntFromStream($xrefStreamData, $streamOffset, $entryField3Size);
+ $streamOffset += $entryField3Size;
+ }
+
+ switch ($type) {
+ case 0:
+ // Free object
+ $refTable->addReference($objNum . ' ' . $field3 . ' R', $field2, false);
+ // Debug output:
+ // echo "Free object - $objNum $field3 R, next free - $field2\n";
+ break;
+
+ case 1:
+ // In use object
+ $refTable->addReference($objNum . ' ' . $field3 . ' R', $field2, true);
+ // Debug output:
+ // echo "In-use object - $objNum $field3 R, offset - $field2\n";
+ break;
+
+ case 2:
+ // Object in an object stream
+ // Debug output:
+ // echo "Compressed object - $objNum 0 R, object stream - $field2 0 R, offset - $field3\n";
+ break;
+ }
+
+ $objNum++;
+ }
+ }
+
+ // $streamOffset . ' ' . strlen($xrefStreamData) . "\n";
+ // "$entries\n";
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception('Cross-reference streams are not supported yet.');
+ }
+
+
+ require_once 'Zend/Pdf/Trailer/Keeper.php';
+ $trailerObj = new Zend_Pdf_Trailer_Keeper($trailerDict, $context);
+ if ($trailerDict->Prev instanceof Zend_Pdf_Element_Numeric ||
+ $trailerDict->Prev instanceof Zend_Pdf_Element_Reference ) {
+ $trailerObj->setPrev($this->_loadXRefTable($trailerDict->Prev->value));
+ $context->getRefTable()->setParent($trailerObj->getPrev()->getRefTable());
+ }
+
+ /**
+ * We set '/Prev' dictionary property to the current cross-reference section offset.
+ * It doesn't correspond to the actual data, but is true when trailer will be used
+ * as a trailer for next generated PDF section.
+ */
+ $trailerObj->Prev = new Zend_Pdf_Element_Numeric($offset);
+
+ return $trailerObj;
+ }
+
+
+ /**
+ * Get Trailer object
+ *
+ * @return Zend_Pdf_Trailer_Keeper
+ */
+ public function getTrailer()
+ {
+ return $this->_trailer;
+ }
+
+ /**
+ * Object constructor
+ *
+ * Note: PHP duplicates string, which is sent by value, only of it's updated.
+ * Thus we don't need to care about overhead
+ *
+ * @param mixed $source
+ * @param Zend_Pdf_ElementFactory_Interface $factory
+ * @param boolean $load
+ * @throws Zend_Exception
+ */
+ public function __construct($source, Zend_Pdf_ElementFactory_Interface $factory, $load)
+ {
+ if ($load) {
+ if (($pdfFile = @fopen($source, 'rb')) === false ) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception( "Can not open '$source' file for reading." );
+ }
+
+ $data = '';
+ $byteCount = filesize($source);
+ while ($byteCount > 0 && !feof($pdfFile)) {
+ $nextBlock = fread($pdfFile, $byteCount);
+ if ($nextBlock === false) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception( "Error occured while '$source' file reading." );
+ }
+
+ $data .= $nextBlock;
+ $byteCount -= strlen($nextBlock);
+ }
+ if ($byteCount != 0) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception( "Error occured while '$source' file reading." );
+ }
+ fclose($pdfFile);
+
+ $this->_stringParser = new Zend_Pdf_StringParser($data, $factory);
+ } else {
+ $this->_stringParser = new Zend_Pdf_StringParser($source, $factory);
+ }
+
+ $pdfVersionComment = $this->_stringParser->readComment();
+ if (substr($pdfVersionComment, 0, 5) != '%PDF-') {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception('File is not a PDF.');
+ }
+
+ $pdfVersion = substr($pdfVersionComment, 5);
+ if (version_compare($pdfVersion, '0.9', '<') ||
+ version_compare($pdfVersion, '1.61', '>=')
+ ) {
+ /**
+ * @todo
+ * To support PDF versions 1.5 (Acrobat 6) and PDF version 1.7 (Acrobat 7)
+ * Stream compression filter must be implemented (for compressed object streams).
+ * Cross reference streams must be implemented
+ */
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('Unsupported PDF version. Zend_Pdf supports PDF 1.0-1.4. Current version - \'%f\'', $pdfVersion));
+ }
+ $this->_pdfVersion = $pdfVersion;
+
+ $this->_stringParser->offset = strrpos($this->_stringParser->data, '%%EOF');
+ if ($this->_stringParser->offset === false ||
+ strlen($this->_stringParser->data) - $this->_stringParser->offset > 7) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception('Pdf file syntax error. End-of-fle marker expected at the end of file.');
+ }
+
+ $this->_stringParser->offset--;
+ /**
+ * Go to end of cross-reference table offset
+ */
+ while (Zend_Pdf_StringParser::isWhiteSpace( ord($this->_stringParser->data[$this->_stringParser->offset]) )&&
+ ($this->_stringParser->offset > 0)) {
+ $this->_stringParser->offset--;
+ }
+ /**
+ * Go to the start of cross-reference table offset
+ */
+ while ( (!Zend_Pdf_StringParser::isWhiteSpace( ord($this->_stringParser->data[$this->_stringParser->offset]) ))&&
+ ($this->_stringParser->offset > 0)) {
+ $this->_stringParser->offset--;
+ }
+ /**
+ * Go to the end of 'startxref' keyword
+ */
+ while (Zend_Pdf_StringParser::isWhiteSpace( ord($this->_stringParser->data[$this->_stringParser->offset]) )&&
+ ($this->_stringParser->offset > 0)) {
+ $this->_stringParser->offset--;
+ }
+ /**
+ * Go to the white space (eol marker) before 'startxref' keyword
+ */
+ $this->_stringParser->offset -= 9;
+
+ $nextLexeme = $this->_stringParser->readLexeme();
+ if ($nextLexeme != 'startxref') {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('Pdf file syntax error. \'startxref\' keyword expected. Offset - 0x%X.', $this->_stringParser->offset-strlen($nextLexeme)));
+ }
+
+ $startXref = $this->_stringParser->readLexeme();
+ if (!ctype_digit($startXref)) {
+ require_once 'Zend/Pdf/Exception.php';
+ throw new Zend_Pdf_Exception(sprintf('Pdf file syntax error. Cross-reference table offset must contain only digits. Offset - 0x%X.', $this->_stringParser->offset-strlen($nextLexeme)));
+ }
+
+ $this->_trailer = $this->_loadXRefTable($startXref);
+ $factory->setObjectCount($this->_trailer->Size->value);
+ }
+
+
+ /**
+ * Object destructor
+ */
+ public function __destruct()
+ {
+ $this->_stringParser->cleanUp();
+ }
+}