david
802479ed64
git-svn-id: https://192.168.0.254/svn/Proyectos.FundacionLQDVI_WebCongresos/trunk@2 94ccb1af-fd9d-d947-8d90-7f70ea60afc8
116 lines
2.6 KiB
PHP
116 lines
2.6 KiB
PHP
<?php
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/**
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* @version $Id:buffer.php 6961 2007-03-15 16:06:53Z tcp $
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* @package Joomla.Framework
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* @subpackage Utilities
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* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
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* @license GNU/GPL, see LICENSE.php
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* Joomla! is free software. This version may have been modified pursuant
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* to the GNU General Public License, and as distributed it includes or
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* is derivative of works licensed under the GNU General Public License or
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* other free or open source software licenses.
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* See COPYRIGHT.php for copyright notices and details.
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*/
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defined('JPATH_BASE') or die();
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/**
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* Generic Buffer stream handler
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*
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* This class provides a generic buffer stream. It can be used to store/retrieve/manipulate
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* string buffers with the standard PHP filesystem I/O methods.
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*
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* @package Joomla.Framework
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* @subpackage Utilities
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* @since 1.5
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*/
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class JBuffer
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{
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/**
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* Stream position
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* @var int
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*/
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var $position = 0;
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/**
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* Buffer name
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* @var string
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*/
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var $name = null;
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/**
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* Buffer hash
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* @var array
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*/
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var $_buffers = array ();
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function stream_open($path, $mode, $options, & $opened_path)
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{
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$url = parse_url($path);
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$this->name = $url["host"];
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$this->_buffers[$this->name] = null;
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$this->position = 0;
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return true;
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}
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function stream_read($count)
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{
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$ret = substr($this->_buffers[$this->name], $this->position, $count);
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$this->position += strlen($ret);
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return $ret;
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}
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function stream_write($data)
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{
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$left = substr($this->_buffers[$this->name], 0, $this->position);
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$right = substr($this->_buffers[$this->name], $this->position + strlen($data));
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$this->_buffers[$this->name] = $left . $data . $right;
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$this->position += strlen($data);
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return strlen($data);
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}
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function stream_tell() {
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return $this->position;
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}
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function stream_eof() {
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return $this->position >= strlen($this->_buffers[$this->name]);
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}
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function stream_seek($offset, $whence)
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{
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switch ($whence)
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{
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case SEEK_SET :
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if ($offset < strlen($this->_buffers[$this->name]) && $offset >= 0) {
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$this->position = $offset;
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return true;
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} else {
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return false;
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}
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break;
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case SEEK_CUR :
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if ($offset >= 0) {
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$this->position += $offset;
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return true;
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} else {
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return false;
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}
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break;
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case SEEK_END :
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if (strlen($this->_buffers[$this->name]) + $offset >= 0) {
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$this->position = strlen($this->_buffers[$this->name]) + $offset;
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return true;
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} else {
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return false;
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}
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break;
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default :
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return false;
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}
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}
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}
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// Register the stream
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stream_wrapper_register("buffer", "JBuffer"); |