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<?php
/**
* phpMyAdmin ShapeFile library
* <https://github.com/phpmyadmin/shapefile/>.
*
* Copyright 2006-2007 Ovidio <ovidio AT users.sourceforge.net>
* Copyright 2016 - 2017 Michal Čihař <[email protected]>
*
* 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.
*
* 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; if not, you can download one from
* https://www.gnu.org/copyleft/gpl.html.
*/
namespace PhpMyAdmin\ShapeFile;
class Util
{
private static $little_endian = null;
private static $shape_names = array(
0 => 'Null Shape',
1 => 'Point',
3 => 'PolyLine',
5 => 'Polygon',
8 => 'MultiPoint',
11 => 'PointZ',
13 => 'PolyLineZ',
15 => 'PolygonZ',
18 => 'MultiPointZ',
21 => 'PointM',
23 => 'PolyLineM',
25 => 'PolygonM',
28 => 'MultiPointM',
31 => 'MultiPatch',
);
/**
* Reads data.
*
* @param string $type type for unpack()
* @param string $data Data to process
*
* @return mixed
*/
public static function loadData($type, $data)
{
if ($data === false || strlen($data) == 0) {
return false;
}
$tmp = unpack($type, $data);
return current($tmp);
}
/**
* Changes endianity.
*
* @param string $binValue Binary value
*
* @return string
*/
public static function swap($binValue)
{
$result = $binValue[strlen($binValue) - 1];
for ($i = strlen($binValue) - 2; $i >= 0; --$i) {
$result .= $binValue[$i];
}
return $result;
}
/**
* Encodes double value to correct endianity.
*
* @param float $value Value to pack
*
* @return string
*/
public static function packDouble($value)
{
$bin = pack('d', (float) $value);
if (is_null(self::$little_endian)) {
self::$little_endian = (pack('L', 1) == pack('V', 1));
}
if (self::$little_endian) {
return $bin;
}
return self::swap($bin);
}
/**
* Returns shape name.
*
* @param int $type
*
* @return string
*/
public static function nameShape($type)
{
if (isset(self::$shape_names[$type])) {
return self::$shape_names[$type];
}
return sprintf('Shape %d', $type);
}
}
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