1 files changed, 95 insertions, 0 deletions
diff --git a/vendor/setasign/fpdi/src/PdfParser/CrossReference/AbstractReader.php b/vendor/setasign/fpdi/src/PdfParser/CrossReference/AbstractReader.php
new file mode 100644
index 0000000..b54237b
--- /dev/null
+++ b/vendor/setasign/fpdi/src/PdfParser/CrossReference/AbstractReader.php
@@ -0,0 +1,95 @@
+<?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\CrossReference;
+
+use setasign\Fpdi\PdfParser\PdfParser;
+use setasign\Fpdi\PdfParser\Type\PdfDictionary;
+use setasign\Fpdi\PdfParser\Type\PdfToken;
+use setasign\Fpdi\PdfParser\Type\PdfTypeException;
+
+/**
+ * Abstract class for cross-reference reader classes.
+ */
+abstract class AbstractReader
+{
+    /**
+     * @var PdfParser
+     */
+    protected $parser;
+
+    /**
+     * @var PdfDictionary
+     */
+    protected $trailer;
+
+    /**
+     * AbstractReader constructor.
+     *
+     * @param PdfParser $parser
+     * @throws CrossReferenceException
+     * @throws PdfTypeException
+     */
+    public function __construct(PdfParser $parser)
+    {
+        $this->parser = $parser;
+        $this->readTrailer();
+    }
+
+    /**
+     * Get the trailer dictionary.
+     *
+     * @return PdfDictionary
+     */
+    public function getTrailer()
+    {
+        return $this->trailer;
+    }
+
+    /**
+     * Read the trailer dictionary.
+     *
+     * @throws CrossReferenceException
+     * @throws PdfTypeException
+     */
+    protected function readTrailer()
+    {
+        try {
+            $trailerKeyword = $this->parser->readValue(null, PdfToken::class);
+            if ($trailerKeyword->value !== 'trailer') {
+                throw new CrossReferenceException(
+                    \sprintf(
+                        'Unexpected end of cross reference. "trailer"-keyword expected, got: %s.',
+                        $trailerKeyword->value
+                    ),
+                    CrossReferenceException::UNEXPECTED_END
+                );
+            }
+        } catch (PdfTypeException $e) {
+            throw new CrossReferenceException(
+                'Unexpected end of cross reference. "trailer"-keyword expected, got an invalid object type.',
+                CrossReferenceException::UNEXPECTED_END,
+                $e
+            );
+        }
+
+        try {
+            $trailer = $this->parser->readValue(null, PdfDictionary::class);
+        } catch (PdfTypeException $e) {
+            throw new CrossReferenceException(
+                'Unexpected end of cross reference. Trailer not found.',
+                CrossReferenceException::UNEXPECTED_END,
+                $e
+            );
+        }
+
+        $this->trailer = $trailer;
+    }
+}