<?php
/* $Id$ */
namespace Mammut\IO\Char;

(defined('MAMMUT') && (basename(__FILE__) != basename($_SERVER['PHP_SELF']))) or die('ACCESS DENIED');

/**
 * String memory buffer IO class.
 * This class extends the byte buffer with string reading methods and character methods.
 *
 * @since 1.1.0.0
 * @author Stefan Daurer <s.daurer@q-spot.org>
 * @package Mammut\IO
 */
trait CharOutputIterator {
	
	// methods defined by iCharIO interface
	abstract public function getCharset();

	abstract public function isMultibyte();
	
	// methods defined by iOutput interface
	abstract public function read($chunksize = 1024);

	public function readChar() {
		$ch = $this->read(1);
		if(!$this->isMultibyte())
			return $ch;
		
		$char = ord($ch);
		if($char < 128)
			return $ch;
		else {
			if($char < 224)
				$bytes = 2;
			elseif($char < 240)
				$bytes = 3;
			elseif($char < 248)
				$bytes = 4;
			elseif($char == 252)
				$bytes = 5;
			else
				$bytes = 6;
			$ch .= $this->read($bytes - 1);
			return $ch;
		}
	}

}