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