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diff --git a/vendor/lsolesen/pel/src/PelEntrySLong.php b/vendor/lsolesen/pel/src/PelEntrySLong.php
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+++ b/vendor/lsolesen/pel/src/PelEntrySLong.php
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+<?php
+
+/**
+ * PEL: PHP Exif Library.
+ * A library with support for reading and
+ * writing all Exif headers in JPEG and TIFF images using PHP.
+ *
+ * Copyright (C) 2004, 2005, 2006 Martin Geisler.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program in the file COPYING; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ */
+namespace lsolesen\pel;
+
+/**
+ * Classes used to hold longs, both signed and unsigned.
+ *
+ * @author Martin Geisler <mgeisler@users.sourceforge.net>
+ * @license http://www.gnu.org/licenses/gpl.html GNU General Public
+ *          License (GPL)
+ * @package PEL
+ */
+
+/**
+ * Class for holding signed longs.
+ *
+ * This class can hold longs, either just a single long or an array of
+ * longs. The class will be used to manipulate any of the Exif tags
+ * which can have format {@link PelFormat::SLONG}.
+ *
+ * @author Martin Geisler <mgeisler@users.sourceforge.net>
+ * @package PEL
+ */
+class PelEntrySLong extends PelEntryNumber
+{
+
+    /**
+     * Make a new entry that can hold a signed long.
+     *
+     * The method accept its arguments in two forms: several integer
+     * arguments or a single array argument. The {@link getValue}
+     * method will always return an array except for when a single
+     * integer argument is given here, or when an array with just a
+     * single integer is given.
+     *
+     * @param
+     *            PelTag the tag which this entry represents. This
+     *            should be one of the constants defined in {@link PelTag}
+     *            which have format {@link PelFormat::SLONG}.
+     *
+     * @param int $value...
+     *            the long(s) that this entry will represent
+     *            or an array of longs. The argument passed must obey the same
+     *            rules as the argument to {@link setValue}, namely that it should
+     *            be within range of a signed long (32 bit), that is between
+     *            -2147483648 and 2147483647 (inclusive). If not, then a {@link
+     *            PelOverflowException} will be thrown.
+     */
+    public function __construct($tag, $value = null)
+    {
+        $this->tag = $tag;
+        $this->min = - 2147483648;
+        $this->max = 2147483647;
+        $this->format = PelFormat::SLONG;
+
+        $value = func_get_args();
+        array_shift($value);
+        $this->setValueArray($value);
+    }
+
+    /**
+     * Convert a number into bytes.
+     *
+     * @param
+     *            int the number that should be converted.
+     *
+     * @param
+     *            PelByteOrder one of {@link PelConvert::LITTLE_ENDIAN} and
+     *            {@link PelConvert::BIG_ENDIAN}, specifying the target byte order.
+     *
+     * @return string bytes representing the number given.
+     */
+    public function numberToBytes($number, $order)
+    {
+        return PelConvert::sLongToBytes($number, $order);
+    }
+}