GenericFixedWidthReader.php

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<?php

/*
 * This file is part of SwiftMailer.
 * (c) 2004-2009 Chris Corbyn
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

//@require 'Swift/CharacterReader.php';

class Swift_CharacterReader_GenericFixedWidthReader
  implements Swift_CharacterReader
{
   
  private $_width;
        
  public function __construct($width)
  {
    $this->_width = $width;
  }

  public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars)
  {
        $strlen = strlen($string);
        // % and / are CPU intensive, so, maybe find a better way
        $ignored = $strlen%$this->_width;
        $ignoredChars = substr($string, - $ignored);
        $currentMap = $this->_width;
        return ($strlen - $ignored)/$this->_width;
        
  }
  
  public function getMapType()
  {
        return self::MAP_TYPE_FIXED_LEN;
  }

  public function validateByteSequence($bytes, $size)
  {
    $needed = $this->_width - $size;
    return ($needed > -1)
      ? $needed
      : -1
      ;
  }

  public function getInitialByteSize()
  {
    return $this->_width;
  }

}