178 lines
3.9 KiB
PHP
178 lines
3.9 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2004-2009 Chris Corbyn
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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//@require 'Swift/ByteStream/AbstractFilterableInputStream.php';
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//@require 'Swift/InputByteStream.php';
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//@require 'Swift/FileStream.php';
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//@require 'Swift/IoException.php';
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/**
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* Allows reading and writing of bytes to and from a file.
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* @package Swift
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* @subpackage ByteStream
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* @author Chris Corbyn
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*/
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class Swift_ByteStream_FileByteStream
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extends Swift_ByteStream_AbstractFilterableInputStream
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implements Swift_FileStream
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{
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/** The internal pointer offset */
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private $_offset = 0;
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/** The path to the file */
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private $_path;
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/** The mode this file is opened in for writing */
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private $_mode;
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/** A lazy-loaded resource handle for reading the file */
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private $_reader;
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/** A lazy-loaded resource handle for writing the file */
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private $_writer;
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/** If magic_quotes_runtime is on, this will be true */
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private $_quotes = false;
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/**
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* Create a new FileByteStream for $path.
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* @param string $path
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* @param string $writable if true
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*/
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public function __construct($path, $writable = false)
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{
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$this->_path = $path;
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$this->_mode = $writable ? 'w+b' : 'rb';
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$this->_quotes = get_magic_quotes_runtime();
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}
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/**
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* Get the complete path to the file.
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* @return string
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*/
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public function getPath()
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{
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return $this->_path;
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}
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/**
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* Reads $length bytes from the stream into a string and moves the pointer
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* through the stream by $length. If less bytes exist than are requested the
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* remaining bytes are given instead. If no bytes are remaining at all, boolean
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* false is returned.
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* @param int $length
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* @return string
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* @throws Swift_IoException
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*/
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public function read($length)
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{
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$fp = $this->_getReadHandle();
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if (!feof($fp))
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{
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if ($this->_quotes)
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{
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set_magic_quotes_runtime(0);
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}
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$bytes = fread($fp, $length);
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if ($this->_quotes)
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{
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set_magic_quotes_runtime(1);
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}
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$this->_offset = ftell($fp);
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return $bytes;
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}
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else
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{
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return false;
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}
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}
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/**
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* Move the internal read pointer to $byteOffset in the stream.
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* @param int $byteOffset
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* @return boolean
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*/
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public function setReadPointer($byteOffset)
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{
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if (isset($this->_reader))
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{
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fseek($this->_reader, $byteOffset, SEEK_SET);
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}
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$this->_offset = $byteOffset;
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}
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// -- Private methods
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/** Just write the bytes to the file */
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protected function _commit($bytes)
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{
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fwrite($this->_getWriteHandle(), $bytes);
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$this->_resetReadHandle();
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}
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/** Not used */
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protected function _flush()
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{
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}
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/** Get the resource for reading */
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private function _getReadHandle()
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{
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if (!isset($this->_reader))
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{
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if (!$this->_reader = fopen($this->_path, 'rb'))
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{
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throw new Swift_IoException(
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'Unable to open file for reading [' . $this->_path . ']'
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);
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}
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fseek($this->_reader, $this->_offset, SEEK_SET);
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}
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return $this->_reader;
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}
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/** Get the resource for writing */
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private function _getWriteHandle()
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{
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if (!isset($this->_writer))
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{
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if (!$this->_writer = fopen($this->_path, $this->_mode))
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{
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throw new Swift_IoException(
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'Unable to open file for writing [' . $this->_path . ']'
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);
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}
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}
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return $this->_writer;
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}
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/** Force a reload of the resource for writing */
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private function _resetWriteHandle()
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{
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if (isset($this->_writer))
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{
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fclose($this->_writer);
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$this->_writer = null;
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}
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}
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/** Force a reload of the resource for reading */
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private function _resetReadHandle()
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{
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if (isset($this->_reader))
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{
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fclose($this->_reader);
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$this->_reader = null;
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}
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}
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}
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