119 lines
2.8 KiB
PHP
119 lines
2.8 KiB
PHP
<?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 - 2017 Michal Čihař <michal@cihar.com>
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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 PhpMyAdmin\ShapeFile;
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class Util
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{
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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, $data)
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{
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if ($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 $binValue Binary value
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*
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* @return string
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*/
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public static function swap($binValue)
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{
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$result = $binValue[strlen($binValue) - 1];
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for ($i = strlen($binValue) - 2; $i >= 0; --$i) {
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$result .= $binValue[$i];
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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 float $value Value to pack
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*
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* @return string
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*/
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public static function packDouble($value)
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{
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$bin = pack('d', (float) $value);
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if (is_null(self::$little_endian)) {
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self::$little_endian = (pack('L', 1) == pack('V', 1));
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}
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if (self::$little_endian) {
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return $bin;
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}
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return self::swap($bin);
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}
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/**
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* Returns shape name.
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*
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* @param int $type
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*
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* @return string
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*/
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public static function nameShape($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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