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<?php |
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/** |
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* phpMyAdmin ShapeFile library |
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* <https://github.com/phpmyadmin/shapefile/> |
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* |
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* Copyright 2006-2007 Ovidio <ovidio AT users.sourceforge.net> |
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* Copyright 2016 Michal Čihař <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, you can download one from |
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* https://www.gnu.org/copyleft/gpl.html. |
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*/ |
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namespace ShapeFile; |
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class Util { |
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private static $little_endian = null; |
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private static $shape_names = array( |
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0 => 'Null Shape', |
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1 => 'Point', |
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3 => 'PolyLine', |
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5 => 'Polygon', |
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8 => 'MultiPoint', |
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11 => 'PointZ', |
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13 => 'PolyLineZ', |
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15 => 'PolygonZ', |
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18 => 'MultiPointZ', |
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21 => 'PointM', |
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23 => 'PolyLineM', |
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25 => 'PolygonM', |
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28 => 'MultiPointM', |
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31 => 'MultiPatch', |
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); |
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/** |
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* Reads data |
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* |
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* @param string $type type for unpack() |
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* @param string $data Data to process |
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* |
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* @return mixed |
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*/ |
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public static function loadData($type, $data) { |
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if ($data === false || strlen($data) == 0) { |
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return false; |
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} |
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$tmp = unpack($type, $data); |
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return current($tmp); |
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} |
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/** |
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* Changes endianity |
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* |
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* @param string $binValue Binary value |
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* |
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* @return string |
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*/ |
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1 |
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public static function swap($binValue) { |
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1 |
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$result = $binValue{strlen($binValue) - 1}; |
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1 |
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for ($i = strlen($binValue) - 2; $i >= 0; $i--) { |
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1 |
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$result .= $binValue{$i}; |
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1 |
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} |
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return $result; |
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} |
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/** |
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* Encodes double value to correct endianity |
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* |
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* @param double $value Value to pack |
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* |
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* @return string |
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*/ |
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public static function packDouble($value) { |
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$bin = pack("d", (double) $value); |
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if (is_null(self::$little_endian)) { |
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1 |
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self::$little_endian = (pack('L', 1) == pack('V', 1)); |
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1 |
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} |
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if (self::$little_endian) { |
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return $bin; |
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} else { |
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return self::swap($bin); |
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} |
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} |
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/** |
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* Returns shape name |
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* |
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* @param integer $type |
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* |
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* @return string |
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*/ |
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public static function nameShape($type) |
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{ |
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if (isset(self::$shape_names[$type])) { |
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return self::$shape_names[$type]; |
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} |
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return sprintf('Shape %d', $type); |
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} |
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} |
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phpmyadmin /
shapefile
