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<?php
/**
* escpos-php, a Thermal receipt printer library, for use with
* ESC/POS compatible printers.
*
* Copyright (c) 2014-2015 Michael Billington <michael.billington@gmail.com>,
* incorporating modifications by:
* - Roni Saha <roni.cse@gmail.com>
* - Gergely Radics <gerifield@ustream.tv>
* - Warren Doyle <w.doyle@fuelled.co>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Interface passed to Escpos class for receiving print data. Print connectors
* are responsible for transporting this to the actual printer.
*/
interface PrintConnector {
/**
* Print connectors should cause a NOTICE if they are deconstructed
* when they have not been finalized.
*/
public function __destruct();
/**
* Finish using this print connector (close file, socket, send
* accumulated output, etc).
*/
public function finalize();
/**
* @param string $data
* @return Data read from the printer, or false where reading is not possible.
*/
public function read($len);
/**
* @param string $data
*/
public function write($data);
}