Subversion-Projekte lars-tiefland.php_share

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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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/*
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 * This file is part of SwiftMailer.
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 * (c) 2004-2009 Chris Corbyn
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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//@require 'Swift/CharacterReader.php';
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/**
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 * Provides fixed-width byte sizes for reading fixed-width character sets.
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 * @package Swift
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 * @subpackage Encoder
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 * @author Chris Corbyn
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 * @author Xavier De Cock <xdecock@gmail.com>
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 */
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class Swift_CharacterReader_GenericFixedWidthReader
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  implements Swift_CharacterReader
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{
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  /**
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   * The number of bytes in a single character.
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   * @var int
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   * @access private
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   */
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  private $_width;
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  /**
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   * Creates a new GenericFixedWidthReader using $width bytes per character.
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   * @param int $width
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   */
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  public function __construct($width)
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  {
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    $this->_width = $width;
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  }
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  /**
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   * Returns the complete charactermap
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   *
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   * @param string $string
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   * @param int $startOffset
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   * @param array $currentMap
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   * @param mixed $ignoredChars
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   * @return $int
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   */
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  public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars)
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  {
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  	$strlen = strlen($string);
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  	// % and / are CPU intensive, so, maybe find a better way
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  	$ignored = $strlen%$this->_width;
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  	$ignoredChars = substr($string, - $ignored);
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  	$currentMap = $this->_width;
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  	return ($strlen - $ignored)/$this->_width;
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  }
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  /**
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   * Returns mapType
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   * @int mapType
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   */
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  public function getMapType()
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  {
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  	return self::MAP_TYPE_FIXED_LEN;
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  }
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  /**
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   * Returns an integer which specifies how many more bytes to read.
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   * A positive integer indicates the number of more bytes to fetch before invoking
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   * this method again.
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   * A value of zero means this is already a valid character.
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   * A value of -1 means this cannot possibly be a valid character.
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   * @param string $bytes
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   * @return int
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   */
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  public function validateByteSequence($bytes, $size)
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  {
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    $needed = $this->_width - $size;
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    return ($needed > -1)
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      ? $needed
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      : -1
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      ;
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  }
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  /**
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   * Returns the number of bytes which should be read to start each character.
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   * @return int
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   */
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  public function getInitialByteSize()
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  {
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    return $this->_width;
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  }
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}