1 files changed, 172 insertions, 0 deletions
diff --git a/vendor/setasign/fpdi/src/PdfParser/Type/PdfString.php b/vendor/setasign/fpdi/src/PdfParser/Type/PdfString.php
new file mode 100644
index 0000000..1636e68
--- /dev/null
+++ b/vendor/setasign/fpdi/src/PdfParser/Type/PdfString.php
@@ -0,0 +1,172 @@
+<?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\Type;
+
+use setasign\Fpdi\PdfParser\StreamReader;
+
+/**
+ * Class representing a PDF string object
+ */
+class PdfString extends PdfType
+{
+    /**
+     * Parses a string object from the stream reader.
+     *
+     * @param StreamReader $streamReader
+     * @return self
+     */
+    public static function parse(StreamReader $streamReader)
+    {
+        $pos = $startPos = $streamReader->getOffset();
+        $openBrackets = 1;
+        do {
+            $buffer = $streamReader->getBuffer(false);
+            for ($length = \strlen($buffer); $openBrackets !== 0 && $pos < $length; $pos++) {
+                switch ($buffer[$pos]) {
+                    case '(':
+                        $openBrackets++;
+                        break;
+                    case ')':
+                        $openBrackets--;
+                        break;
+                    case '\\':
+                        $pos++;
+                }
+            }
+        } while ($openBrackets !== 0 && $streamReader->increaseLength());
+
+        $result = \substr($buffer, $startPos, $openBrackets + $pos - $startPos - 1);
+        $streamReader->setOffset($pos);
+
+        $v = new self();
+        $v->value = $result;
+
+        return $v;
+    }
+
+    /**
+     * Helper method to create an instance.
+     *
+     * @param string $value The string needs to be escaped accordingly.
+     * @return self
+     */
+    public static function create($value)
+    {
+        $v = new self();
+        $v->value = $value;
+
+        return $v;
+    }
+
+    /**
+     * Ensures that the passed value is a PdfString instance.
+     *
+     * @param mixed $string
+     * @return self
+     * @throws PdfTypeException
+     */
+    public static function ensure($string)
+    {
+        return PdfType::ensureType(self::class, $string, 'String value expected.');
+    }
+
+    /**
+     * Unescapes escaped sequences in a PDF string according to the PDF specification.
+     *
+     * @param string $s
+     * @return string
+     */
+    public static function unescape($s)
+    {
+        $out = '';
+        /** @noinspection ForeachInvariantsInspection */
+        for ($count = 0, $n = \strlen($s); $count < $n; $count++) {
+            if ($s[$count] !== '\\') {
+                $out .= $s[$count];
+            } else {
+                // A backslash at the end of the string - ignore it
+                if ($count === ($n - 1)) {
+                    break;
+                }
+
+                switch ($s[++$count]) {
+                    case ')':
+                    case '(':
+                    case '\\':
+                        $out .= $s[$count];
+                        break;
+
+                    case 'f':
+                        $out .= "\x0C";
+                        break;
+
+                    case 'b':
+                        $out .= "\x08";
+                        break;
+
+                    case 't':
+                        $out .= "\x09";
+                        break;
+
+                    case 'r':
+                        $out .= "\x0D";
+                        break;
+
+                    case 'n':
+                        $out .= "\x0A";
+                        break;
+
+                    case "\r":
+                        if ($count !== $n - 1 && $s[$count + 1] === "\n") {
+                            $count++;
+                        }
+                        break;
+
+                    case "\n":
+                        break;
+
+                    default:
+                        $actualChar = \ord($s[$count]);
+                        // ascii 48 = number 0
+                        // ascii 57 = number 9
+                        if ($actualChar >= 48 && $actualChar <= 57) {
+                            $oct = '' . $s[$count];
+
+                            /** @noinspection NotOptimalIfConditionsInspection */
+                            if (
+                                $count + 1 < $n
+                                && \ord($s[$count + 1]) >= 48
+                                && \ord($s[$count + 1]) <= 57
+                            ) {
+                                $count++;
+                                $oct .= $s[$count];
+
+                                /** @noinspection NotOptimalIfConditionsInspection */
+                                if (
+                                    $count + 1 < $n
+                                    && \ord($s[$count + 1]) >= 48
+                                    && \ord($s[$count + 1]) <= 57
+                                ) {
+                                    $oct .= $s[++$count];
+                                }
+                            }
+
+                            $out .= \chr(\octdec($oct));
+                        } else {
+                            // If the character is not one of those defined, the backslash is ignored
+                            $out .= $s[$count];
+                        }
+                }
+            }
+        }
+        return $out;
+    }
+}