# InputStream.class.php

Go to the documentation of this file.

    00001 <?php
    00002 /***************************************************************************
    00003  *   Copyright (C) 2007 by Ivan Y. Khvostishkov                            *
    00004  *                                                                         *
    00005  *   This program is free software; you can redistribute it and/or modify  *
    00006  *   it under the terms of the GNU Lesser General Public License as        *
    00007  *   published by the Free Software Foundation; either version 3 of the    *
    00008  *   License, or (at your option) any later version.                       *
    00009  *                                                                         *
    00010  ***************************************************************************/
    00011
    00015     abstract class InputStream
    00016     {
    00032         abstract public function read($length);
    00033         abstract public function isEof();
    00034
    00038         public function mark()
    00039         {
    00040             /* nop */
    00041
    00042             return $this;
    00043         }
    00044
    00045         public function markSupported()
    00046         {
    00047             return false;
    00048         }
    00049
    00050         public function reset()
    00051         {
    00052             throw new IOException(
    00053                 'mark has been invalidated'
    00054             );
    00055         }
    00056
    00057         public function skip($count)
    00058         {
    00059             return strlen($this->read($count));
    00060         }
    00061
    00062         public function available()
    00063         {
    00064             return 0;
    00065         }
    00066
    00070         public function close()
    00071         {
    00072             /* nop */
    00073
    00074             return $this;
    00075         }
    00076     }
    00077 ?>