195 Zeilen
5.3 KiB
PHP
195 Zeilen
5.3 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* A reader that concatene the data of the files of a source
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*
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* PHP versions 4 and 5
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330,Boston,MA 02111-1307 USA
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*
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* @category File Formats
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* @package File_Archive
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* @author Vincent Lascaux <vincentlascaux@php.net>
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* @copyright 1997-2005 The PHP Group
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* @license http://www.gnu.org/copyleft/lesser.html LGPL
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* @version CVS: $Id: Concat.php 2 2010-11-23 14:32:26Z oldperl $
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* @link http://pear.php.net/package/File_Archive
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*/
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require_once "File/Archive/Reader/Relay.php";
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/**
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* This reader provides one single file that is the concatenation of the data of
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* all the files of another reader
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*/
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class File_Archive_Reader_Concat extends File_Archive_Reader
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{
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var $source;
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var $filename;
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var $stat;
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var $mime;
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var $opened = false;
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var $filePos = 0;
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function File_Archive_Reader_Concat(&$source, $filename,
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$stat=array(), $mime=null)
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{
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$this->source =& $source;
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$this->filename = $filename;
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$this->stat = $stat;
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$this->mime = $mime;
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//Compute the total length
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$this->stat[7] = 0;
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while (($error = $source->next()) === true) {
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$sourceStat = $source->getStat();
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if (isset($sourceStat[7])) {
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$this->stat[7] += $sourceStat[7];
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} else {
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unset($this->stat[7]);
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break;
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}
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}
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if (isset($this->stat[7])) {
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$this->stat['size'] = $this->stat[7];
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}
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if (PEAR::isError($error) || PEAR::isError($source->close())) {
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die("Error in File_Archive_Reader_Concat constructor ".
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'('.$error->getMessage().'), cannot continue');
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}
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}
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/**
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* @see File_Archive_Reader::next()
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*/
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function next()
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{
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if (!$this->opened) {
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return $this->opened = $this->source->next();
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} else {
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return false;
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}
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}
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/**
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* @see File_Archive_Reader::getFilename()
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*/
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function getFilename() { return $this->filename; }
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/**
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* @see File_Archive_Reader::getStat()
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*/
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function getStat() { return $this->stat; }
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/**
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* @see File_Archive_Reader::getMime()
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*/
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function getMime()
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{
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return $this->mime==null ? parent::getMime() : $this->mime;
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}
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/**
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* @see File_Archive_Reader::getData()
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*/
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function getData($length = -1)
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{
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if ($length == 0) {
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return '';
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}
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$result = '';
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while ($length == -1 || strlen($result)<$length) {
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$sourceData = $this->source->getData(
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$length==-1 ? -1 : $length - strlen($result)
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);
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if (PEAR::isError($sourceData)) {
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return $sourceData;
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}
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if ($sourceData === null) {
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$error = $this->source->next();
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if (PEAR::isError($error)) {
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return $error;
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}
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if (!$error) {
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break;
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}
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} else {
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$result .= $sourceData;
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}
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}
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$this->filePos += strlen($result);
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return $result == '' ? null : $result;
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}
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/**
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* @see File_Archive_Reader::skip()
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*/
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function skip($length = -1)
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{
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$skipped = 0;
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while ($skipped < $length) {
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$sourceSkipped = $this->source->skip($length);
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if (PEAR::isError($sourceSkipped)) {
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return $skipped;
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}
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$skipped += $sourceSkipped;
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$filePos += $sourceSkipped;
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if ($sourceSkipped < $length) {
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$error = $this->source->next();
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if (PEAR::isError($error)) {
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return $error;
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}
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if (!$error) {
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return $skipped;
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}
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}
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}
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return $skipped;
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}
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/**
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* @see File_Archive_Reader::rewind()
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*/
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function rewind($length = -1)
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{
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//TODO: implement rewind
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return parent::rewind($length);
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}
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/**
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* @see File_Archive_Reader::tell()
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*/
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function tell()
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{
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return $this->filePos;
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}
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/**
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* @see File_Archive_Reader::close()
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*/
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function close()
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{
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$this->opened = false;
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$this->filePos = 0;
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return $this->source->close();
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}
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/**
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* @see File_Archive_Reader::makeWriter
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*/
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function makeWriter($fileModif = true, $seek = 0)
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{
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return $this->source->makeWriter($fileModif, $seek);
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}
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}
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?>
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