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<?php /* * $Id: Reader.php 227 2007-08-28 02:17:00Z hans $ * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * This software consists of voluntary contributions made by many individuals * and is licensed under the LGPL. For more information please see * <http://phing.info>. */ /** * Abstract class for reading character streams. * * @author Hans Lellelid <hans@xmpl.org> * @author Yannick Lecaillez <yl@seasonfive.com> * @version $Revision: 1.5 $ * @package phing.system.io */ abstract class Reader { /** * Read data from source. * * If length is specified, then only that number of chars is read, * otherwise stream is read until EOF. * * @param int $len */ abstract public function read($len = null); /** * Close stream. * @throws IOException if there is an error closing stream */ abstract public function close(); /** * Returns the filename, url, etc. that is being read from. * This is critical for, e.g., ExpatParser's ability to know * the filename that is throwing an ExpatParserException, etc. * @return string */ abstract function getResource(); /** * Move stream position relative to current pos. * @param int $n */ public function skip($n) {} /** * Reset the current position in stream to beginning or last mark (if supported). */ public function reset() {} /** * If supported, places a "marker" (like a bookmark) at current stream position. * A subsequent call to reset() will move stream position back * to last marker (if supported). */ public function mark() {} /** * Whether marking is supported. * @return boolean */ public function markSupported() { return false; } /** * Is stream ready for reading. * @return boolean */ public function ready() { return true; } }
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