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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
*/
/**
* 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
*/
namespace lsolesen\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 int $tag
* 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 $number
* the number that should be converted.
* @param boolean $order
* one of {@link PelConvert::LITTLE_ENDIAN} and
* {@link PelConvert::BIG_ENDIAN}, specifying the target byte order.
* @return string bytes representing the number given.
*/
public function numberToBytes($number, $order)
{
return PelConvert::sLongToBytes($number, $order);
}
}