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path: root/applications/core/lib/Zend/Pdf/StringParser.php
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diff --git a/applications/core/lib/Zend/Pdf/StringParser.php b/applications/core/lib/Zend/Pdf/StringParser.php
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@@ -0,0 +1,709 @@
+<?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 [email protected] so we can send you a copy immediately.
+ *
+ * @package Zend_Pdf
+ * @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+
+/** Zend_Pdf_Element */
+require_once 'Zend/Pdf/Element.php';
+
+/** Zend_Pdf_Element_Array */
+require_once 'Zend/Pdf/Element/Array.php';
+
+/** Zend_Pdf_Element_String_Binary */
+require_once 'Zend/Pdf/Element/String/Binary.php';
+
+/** Zend_Pdf_Element_Boolean */
+require_once 'Zend/Pdf/Element/Boolean.php';
+
+/** Zend_Pdf_Element_Dictionary */
+require_once 'Zend/Pdf/Element/Dictionary.php';
+
+/** Zend_Pdf_Element_Name */
+require_once 'Zend/Pdf/Element/Name.php';
+
+/** Zend_Pdf_Element_Numeric */
+require_once 'Zend/Pdf/Element/Numeric.php';
+
+/** Zend_Pdf_Element_Object */
+require_once 'Zend/Pdf/Element/Object.php';
+
+/** Zend_Pdf_Element_Reference */
+require_once 'Zend/Pdf/Element/Reference.php';
+
+/** Zend_Pdf_Element_Object_Stream */
+require_once 'Zend/Pdf/Element/Object/Stream.php';
+
+/** Zend_Pdf_Element_String */
+require_once 'Zend/Pdf/Element/String.php';
+
+/** Zend_Pdf_Element_Null */
+require_once 'Zend/Pdf/Element/Null.php';
+
+/** Zend_Pdf_Element_Reference_Context */
+require_once 'Zend/Pdf/Element/Reference/Context.php';
+
+/** Zend_Pdf_Element_Reference_Table */
+require_once 'Zend/Pdf/Element/Reference/Table.php';
+
+/** Zend_Pdf_ElementFactory_Interface */
+require_once 'Zend/Pdf/ElementFactory/Interface.php';
+
+/** Zend_Pdf_PhpArray */
+require_once 'Zend/Pdf/PhpArray.php';
+
+
+/**
+ * PDF string parser
+ *
+ * @package Zend_Pdf
+ * @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Zend_Pdf_StringParser
+{
+ /**
+ * Source PDF
+ *
+ * @var string
+ */
+ public $data = '';
+
+ /**
+ * Current position in a data
+ *
+ * @var integer
+ */
+ public $offset = 0;
+
+ /**
+ * Current reference context
+ *
+ * @var Zend_Pdf_Element_Reference_Context
+ */
+ private $_context = null;
+
+ /**
+ * Array of elements of the currently parsed object/trailer
+ *
+ * @var array
+ */
+ private $_elements = array();
+
+ /**
+ * PDF objects factory.
+ *
+ * @var Zend_Pdf_ElementFactory_Interface
+ */
+ private $_objFactory = null;
+
+
+ /**
+ * Clean up resources.
+ *
+ * Clear current state to remove cyclic object references
+ */
+ public function cleanUp()
+ {
+ $this->_context = null;
+ $this->_elements = array();
+ $this->_objFactory = null;
+ }
+
+ /**
+ * Character with code $chCode is white space
+ *
+ * @param integer $chCode
+ * @return boolean
+ */
+ public static function isWhiteSpace($chCode)
+ {
+ if ($chCode == 0x00 || // null character
+ $chCode == 0x09 || // Tab
+ $chCode == 0x0A || // Line feed
+ $chCode == 0x0C || // Form Feed
+ $chCode == 0x0D || // Carriage return
+ $chCode == 0x20 // Space
+ ) {
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+
+ /**
+ * Character with code $chCode is a delimiter character
+ *
+ * @param integer $chCode
+ * @return boolean
+ */
+ public static function isDelimiter($chCode )
+ {
+ if ($chCode == 0x28 || // '('
+ $chCode == 0x29 || // ')'
+ $chCode == 0x3C || // '<'
+ $chCode == 0x3E || // '>'
+ $chCode == 0x5B || // '['
+ $chCode == 0x5D || // ']'
+ $chCode == 0x7B || // '{'
+ $chCode == 0x7D || // '}'
+ $chCode == 0x2F || // '/'
+ $chCode == 0x25 // '%'
+ ) {
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+
+ /**
+ * Skip white space
+ *
+ * @param boolean $skipComment
+ */
+ public function skipWhiteSpace($skipComment = true)
+ {
+ while ($this->offset < strlen($this->data)) {
+ if (self::isWhiteSpace( ord($this->data[$this->offset]) )) {
+ $this->offset++;
+ } else if (ord($this->data[$this->offset]) == 0x25 && $skipComment) { // '%'
+ $this->skipComment();
+ } else {
+ return;
+ }
+ }
+ }
+
+
+ /**
+ * Skip comment
+ */
+ public function skipComment()
+ {
+ while ($this->offset < strlen($this->data))
+ {
+ if (ord($this->data[$this->offset]) != 0x0A || // Line feed
+ ord($this->data[$this->offset]) != 0x0d // Carriage return
+ ) {
+ $this->offset++;
+ } else {
+ return;
+ }
+ }
+ }
+
+
+ /**
+ * Read comment line
+ *
+ * @return string
+ */
+ public function readComment()
+ {
+ $this->skipWhiteSpace(false);
+
+ /** Check if it's a comment line */
+ if ($this->data[$this->offset] != '%') {
+ return '';
+ }
+
+ for ($start = $this->offset;
+ $this->offset < strlen($this->data);
+ $this->offset++) {
+ if (ord($this->data[$this->offset]) == 0x0A || // Line feed
+ ord($this->data[$this->offset]) == 0x0d // Carriage return
+ ) {
+ break;
+ }
+ }
+
+ return substr($this->data, $start, $this->offset-$start);
+ }
+
+
+ /**
+ * Returns next lexeme from a pdf stream
+ *
+ * @return string
+ */
+ public function readLexeme()
+ {
+ $this->skipWhiteSpace();
+
+ if ($this->offset >= strlen($this->data)) {
+ return '';
+ }
+
+ $start = $this->offset;
+
+ if (self::isDelimiter( ord($this->data[$start]) )) {
+ if ($this->data[$start] == '<' && $this->offset + 1 < strlen($this->data) && $this->data[$start+1] == '<') {
+ $this->offset += 2;
+ return '<<';
+ } else if ($this->data[$start] == '>' && $this->offset + 1 < strlen($this->data) && $this->data[$start+1] == '>') {
+ $this->offset += 2;
+ return '>>';
+ } else {
+ $this->offset++;
+ return $this->data[$start];
+ }
+ } else {
+ while ( ($this->offset < strlen($this->data)) &&
+ (!self::isDelimiter( ord($this->data[$this->offset]) )) &&
+ (!self::isWhiteSpace( ord($this->data[$this->offset]) )) ) {
+ $this->offset++;
+ }
+
+ return substr($this->data, $start, $this->offset - $start);
+ }
+ }
+
+
+ /**
+ * Read elemental object from a PDF stream
+ *
+ * @return Zend_Pdf_Element
+ * @throws Zend_Pdf_Exception
+ */
+ public function readElement($nextLexeme = null)
+ {
+ if ($nextLexeme === null) {
+ $nextLexeme = $this->readLexeme();
+ }
+
+ /**
+ * Note: readElement() method is a public method and could be invoked from other classes.
+ * If readElement() is used not by Zend_Pdf_StringParser::getObject() method, then we should not care
+ * about _elements member management.
+ */
+ switch ($nextLexeme) {
+ case '(':
+ return ($this->_elements[] = $this->_readString());
+
+ case '<':
+ return ($this->_elements[] = $this->_readBinaryString());
+
+ case '/':
+ return ($this->_elements[] = new Zend_Pdf_Element_Name(
+ Zend_Pdf_Element_Name::unescape( $this->readLexeme() )
+ ));
+
+ case '[':
+ return ($this->_elements[] = $this->_readArray());
+
+ case '<<':
+ return ($this->_elements[] = $this->_readDictionary());
+
+ case ')':
+ // fall through to next case
+ case '>':
+ // fall through to next case
+ case ']':
+ // fall through to next case
+ case '>>':
+ // fall through to next case
+ case '{':
+ // fall through to next case
+ case '}':
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X.',
+ $this->offset));
+
+ default:
+ if (strcasecmp($nextLexeme, 'true') == 0) {
+ return ($this->_elements[] = new Zend_Pdf_Element_Boolean(true));
+ } else if (strcasecmp($nextLexeme, 'false') == 0) {
+ return ($this->_elements[] = new Zend_Pdf_Element_Boolean(false));
+ } else if (strcasecmp($nextLexeme, 'null') == 0) {
+ return ($this->_elements[] = new Zend_Pdf_Element_Null());
+ }
+
+ $ref = $this->_readReference($nextLexeme);
+ if ($ref !== null) {
+ return ($this->_elements[] = $ref);
+ }
+
+ return ($this->_elements[] = $this->_readNumeric($nextLexeme));
+ }
+ }
+
+
+ /**
+ * Read string PDF object
+ * Also reads trailing ')' from a pdf stream
+ *
+ * @return Zend_Pdf_Element_String
+ * @throws Zend_Pdf_Exception
+ */
+ private function _readString()
+ {
+ $start = $this->offset;
+ $openedBrackets = 1;
+
+ while ($this->offset < strlen($this->data)) {
+ switch (ord( $this->data[$this->offset] )) {
+ case 0x28: // '(' - opened bracket in the string, needs balanced pair.
+ $openedBrackets++;
+ break;
+
+ case 0x29: // ')' - pair to the opened bracket
+ $openedBrackets--;
+ break;
+
+ case 0x5C: // '\\' - escape sequence, skip next char from a check
+ $this->offset++;
+ }
+
+ $this->offset++;
+ if ($openedBrackets == 0) {
+ break; // end of string
+ }
+ }
+ if ($openedBrackets != 0) {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Unexpected end of file while string reading. Offset - 0x%X. \')\' expected.', $start));
+ }
+
+ return new Zend_Pdf_Element_String(Zend_Pdf_Element_String::unescape( substr($this->data,
+ $start,
+ $this->offset - $start - 1) ));
+ }
+
+
+ /**
+ * Read binary string PDF object
+ * Also reads trailing '>' from a pdf stream
+ *
+ * @return Zend_Pdf_Element_String_Binary
+ * @throws Zend_Pdf_Exception
+ */
+ private function _readBinaryString()
+ {
+ $start = $this->offset;
+
+ while ($this->offset < strlen($this->data)) {
+ if (self::isWhiteSpace( ord($this->data[$this->offset]) ) ||
+ ctype_xdigit( $this->data[$this->offset] ) ) {
+ $this->offset++;
+ } else if ($this->data[$this->offset] == '>') {
+ $this->offset++;
+ return new Zend_Pdf_Element_String_Binary(
+ Zend_Pdf_Element_String_Binary::unescape( substr($this->data,
+ $start,
+ $this->offset - $start - 1) ));
+ } else {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Unexpected character while binary string reading. Offset - 0x%X.', $this->offset));
+ }
+ }
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Unexpected end of file while binary string reading. Offset - 0x%X. \'>\' expected.', $start));
+ }
+
+
+ /**
+ * Read array PDF object
+ * Also reads trailing ']' from a pdf stream
+ *
+ * @return Zend_Pdf_Element_Array
+ * @throws Zend_Pdf_Exception
+ */
+ private function _readArray()
+ {
+ $elements = array();
+
+ while ( strlen($nextLexeme = $this->readLexeme()) != 0 ) {
+ if ($nextLexeme != ']') {
+ $elements[] = $this->readElement($nextLexeme);
+ } else {
+ return new Zend_Pdf_Element_Array($elements);
+ }
+ }
+
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Unexpected end of file while array reading. Offset - 0x%X. \']\' expected.', $this->offset));
+ }
+
+
+ /**
+ * Read dictionary PDF object
+ * Also reads trailing '>>' from a pdf stream
+ *
+ * @return Zend_Pdf_Element_Dictionary
+ * @throws Zend_Pdf_Exception
+ */
+ private function _readDictionary()
+ {
+ $dictionary = new Zend_Pdf_Element_Dictionary();
+
+ while ( strlen($nextLexeme = $this->readLexeme()) != 0 ) {
+ if ($nextLexeme != '>>') {
+ $nameStart = $this->offset - strlen($nextLexeme);
+
+ $name = $this->readElement($nextLexeme);
+ $value = $this->readElement();
+
+ if (!$name instanceof Zend_Pdf_Element_Name) {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Name object expected while dictionary reading. Offset - 0x%X.', $nameStart));
+ }
+
+ $dictionary->add($name, $value);
+ } else {
+ return $dictionary;
+ }
+ }
+
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Unexpected end of file while dictionary reading. Offset - 0x%X. \'>>\' expected.', $this->offset));
+ }
+
+
+ /**
+ * Read reference PDF object
+ *
+ * @param string $nextLexeme
+ * @return Zend_Pdf_Element_Reference
+ */
+ private function _readReference($nextLexeme = null)
+ {
+ $start = $this->offset;
+
+ if ($nextLexeme === null) {
+ $objNum = $this->readLexeme();
+ } else {
+ $objNum = $nextLexeme;
+ }
+ if (!ctype_digit($objNum)) { // it's not a reference
+ $this->offset = $start;
+ return null;
+ }
+
+ $genNum = $this->readLexeme();
+ if (!ctype_digit($genNum)) { // it's not a reference
+ $this->offset = $start;
+ return null;
+ }
+
+ $rMark = $this->readLexeme();
+ if ($rMark != 'R') { // it's not a reference
+ $this->offset = $start;
+ return null;
+ }
+
+ $ref = new Zend_Pdf_Element_Reference((int)$objNum, (int)$genNum, $this->_context, $this->_objFactory->resolve());
+
+ return $ref;
+ }
+
+
+ /**
+ * Read numeric PDF object
+ *
+ * @param string $nextLexeme
+ * @return Zend_Pdf_Element_Numeric
+ */
+ private function _readNumeric($nextLexeme = null)
+ {
+ if ($nextLexeme === null) {
+ $nextLexeme = $this->readLexeme();
+ }
+
+ return new Zend_Pdf_Element_Numeric($nextLexeme);
+ }
+
+
+ /**
+ * Read inderect object from a PDF stream
+ *
+ * @param integer $offset
+ * @param Zend_Pdf_Element_Reference_Context $context
+ * @return Zend_Pdf_Element_Object
+ */
+ public function getObject($offset, Zend_Pdf_Element_Reference_Context $context)
+ {
+ if ($offset === null ) {
+ return new Zend_Pdf_Element_Null();
+ }
+
+ // Save current offset to make getObject() reentrant
+ $offsetSave = $this->offset;
+
+ $this->offset = $offset;
+ $this->_context = $context;
+ $this->_elements = array();
+
+ $objNum = $this->readLexeme();
+ if (!ctype_digit($objNum)) {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Object number expected.', $this->offset - strlen($objNum)));
+ }
+
+ $genNum = $this->readLexeme();
+ if (!ctype_digit($genNum)) {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Object generation number expected.', $this->offset - strlen($genNum)));
+ }
+
+ $objKeyword = $this->readLexeme();
+ if ($objKeyword != 'obj') {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. \'obj\' keyword expected.', $this->offset - strlen($objKeyword)));
+ }
+
+ $objValue = $this->readElement();
+
+ $nextLexeme = $this->readLexeme();
+
+ if( $nextLexeme == 'endobj' ) {
+ /**
+ * Object is not generated by factory (thus it's not marked as modified object).
+ * But factory is assigned to the obect.
+ */
+ $obj = new Zend_Pdf_Element_Object($objValue, (int)$objNum, (int)$genNum, $this->_objFactory->resolve());
+
+ foreach ($this->_elements as $element) {
+ $element->setParentObject($obj);
+ }
+
+ // Restore offset value
+ $this->offset = $offsetSave;
+
+ return $obj;
+ }
+
+ /**
+ * It's a stream object
+ */
+ if ($nextLexeme != 'stream') {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. \'endobj\' or \'stream\' keywords expected.', $this->offset - strlen($nextLexeme)));
+ }
+
+ if (!$objValue instanceof Zend_Pdf_Element_Dictionary) {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. Stream extent must be preceded by stream dictionary.', $this->offset - strlen($nextLexeme)));
+ }
+
+ /**
+ * References are automatically dereferenced at this moment.
+ */
+ $streamLength = $objValue->Length->value;
+
+ /**
+ * 'stream' keyword must be followed by either cr-lf sequence or lf character only.
+ * This restriction gives the possibility to recognize all cases exactly
+ */
+ if ($this->data[$this->offset] == "\r" &&
+ $this->data[$this->offset + 1] == "\n" ) {
+ $this->offset += 2;
+ } else if ($this->data[$this->offset] == "\n" ) {
+ $this->offset++;
+ } else {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. \'stream\' must be followed by either cr-lf sequence or lf character only.', $this->offset - strlen($nextLexeme)));
+ }
+
+ $dataOffset = $this->offset;
+
+ $this->offset += $streamLength;
+
+ $nextLexeme = $this->readLexeme();
+ if ($nextLexeme != 'endstream') {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. \'endstream\' keyword expected.', $this->offset - strlen($nextLexeme)));
+ }
+
+ $nextLexeme = $this->readLexeme();
+ if ($nextLexeme != 'endobj') {
+ throw new Zend_Pdf_Exception(sprintf('PDF file syntax error. Offset - 0x%X. \'endobj\' keyword expected.', $this->offset - strlen($nextLexeme)));
+ }
+
+ $obj = new Zend_Pdf_Element_Object_Stream(substr($this->data,
+ $dataOffset,
+ $streamLength),
+ (int)$objNum,
+ (int)$genNum,
+ $this->_objFactory->resolve(),
+ $objValue);
+
+ foreach ($this->_elements as $element) {
+ $element->setParentObject($obj);
+ }
+
+ // Restore offset value
+ $this->offset = $offsetSave;
+
+ return $obj;
+ }
+
+
+ /**
+ * Get length of source string
+ *
+ * @return integer
+ */
+ public function getLength()
+ {
+ return strlen($this->data);
+ }
+
+ /**
+ * Get source string
+ *
+ * @return string
+ */
+ public function getString()
+ {
+ return $this->data;
+ }
+
+
+ /**
+ * Parse integer value from a binary stream
+ *
+ * @param string $stream
+ * @param integer $offset
+ * @param integer $size
+ * @return integer
+ */
+ public static function parseIntFromStream($stream, $offset, $size)
+ {
+ $value = 0;
+ for ($count = 0; $count < $size; $count++) {
+ $value *= 256;
+ $value += ord($stream[$offset + $count]);
+ }
+
+ return $value;
+ }
+
+
+
+ /**
+ * Set current context
+ *
+ * @param Zend_Pdf_Element_Reference_Context $context
+ */
+ public function setContext(Zend_Pdf_Element_Reference_Context $context)
+ {
+ $this->_context = $context;
+ }
+
+ /**
+ * 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 string $pdfString
+ * @param Zend_Pdf_ElementFactory_Interface $factory
+ */
+ public function __construct($source, Zend_Pdf_ElementFactory_Interface $factory)
+ {
+ $this->data = $source;
+ $this->_objFactory = $factory;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-30 00:53:38 +0000