You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
3.6 KiB
144 lines
3.6 KiB
<?php
|
|
|
|
/**
|
|
* PHP Shapefile - PHP library to read and write ESRI Shapefiles, compatible with WKT and GeoJSON
|
|
*
|
|
* @package Shapefile
|
|
* @author Gaspare Sganga
|
|
* @version 4.0.0dev
|
|
* @license MIT
|
|
* @link https://gasparesganga.com/labs/php-shapefile/
|
|
*/
|
|
|
|
namespace Shapefile\File;
|
|
|
|
use Shapefile\Shapefile;
|
|
use Shapefile\ShapefileException;
|
|
|
|
/**
|
|
* Default FileInterface implementation.
|
|
* It allows reading/writing of files in binary mode.
|
|
* It accepts both filepaths and stream resource handles.
|
|
*/
|
|
class StreamResourceFile implements FileInterface
|
|
{
|
|
/////////////////////////////// PRIVATE VARIABLES ///////////////////////////////
|
|
/**
|
|
* @var resource File resource handle.
|
|
*/
|
|
private $handle = null;
|
|
|
|
/**
|
|
* @var bool Flag to store whether file was passed as resource handle or not.
|
|
*/
|
|
private $flag_resource = false;
|
|
|
|
|
|
|
|
/////////////////////////////// PUBLIC ///////////////////////////////
|
|
/**
|
|
* Constructor.
|
|
* Opens file with binary read or write access.
|
|
*
|
|
* @param string|resource $file Path to file or resource handle.
|
|
* @param bool $write_access Access type: false = read; true = write.
|
|
*/
|
|
public function __construct($file, $write_access)
|
|
{
|
|
$this->flag_resource = is_resource($file);
|
|
|
|
if ($this->flag_resource) {
|
|
$this->handle = $file;
|
|
if (get_resource_type($this->handle) !== 'stream' || !stream_get_meta_data($this->handle)['seekable']) {
|
|
throw new ShapefileException(Shapefile::ERR_FILE_RESOURCE_NOT_VALID);
|
|
}
|
|
if ((!$write_access && !$this->isReadable()) || ($write_access && !$this->isWritable())) {
|
|
throw new ShapefileException(Shapefile::ERR_FILE_PERMISSIONS);
|
|
}
|
|
} else {
|
|
$this->handle = @fopen($file, $write_access ? 'c+b' : 'rb');
|
|
if ($this->handle === false) {
|
|
throw new ShapefileException(Shapefile::ERR_FILE_OPEN);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Destructor.
|
|
*
|
|
* Closes file if it was NOT passed as resource handle.
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
if (!$this->flag_resource) {
|
|
fclose($this->handle);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Gets canonicalized absolute pathname.
|
|
*/
|
|
public function getFilepath()
|
|
{
|
|
return realpath(stream_get_meta_data($this->handle)['uri']);
|
|
}
|
|
|
|
|
|
public function isReadable()
|
|
{
|
|
return in_array(stream_get_meta_data($this->handle)['mode'], ['rb', 'r+b', 'w+b', 'x+b', 'c+b']);
|
|
}
|
|
|
|
public function isWritable()
|
|
{
|
|
return in_array(stream_get_meta_data($this->handle)['mode'], ['r+b', 'wb', 'w+b', 'xb', 'x+b', 'cb', 'c+b']);
|
|
}
|
|
|
|
|
|
public function truncate($size)
|
|
{
|
|
ftruncate($this->handle, $size);
|
|
}
|
|
|
|
public function getSize()
|
|
{
|
|
return fstat($this->handle)['size'];
|
|
}
|
|
|
|
|
|
public function getPointer()
|
|
{
|
|
return ftell($this->handle);
|
|
}
|
|
|
|
public function setPointer($position)
|
|
{
|
|
fseek($this->handle, $position, SEEK_SET);
|
|
}
|
|
|
|
public function resetPointer()
|
|
{
|
|
fseek($this->handle, 0, SEEK_END);
|
|
}
|
|
|
|
public function setOffset($offset)
|
|
{
|
|
fseek($this->handle, $offset, SEEK_CUR);
|
|
}
|
|
|
|
|
|
public function read($length)
|
|
{
|
|
return @fread($this->handle, $length);
|
|
}
|
|
|
|
public function write($data)
|
|
{
|
|
if (@fwrite($this->handle, $data) === false) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|