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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';
/**
* Analyzes US-ASCII characters.
* @package Swift
* @subpackage Encoder
* @author Chris Corbyn
*/
class Swift_CharacterReader_UsAsciiReader
implements Swift_CharacterReader
{
/**
* Returns the complete charactermap
*
* @param string $string
* @param int $startOffset
* @param string $ignoredChars
*/
public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars)
{
$strlen=strlen($string);
$ignoredChars='';
for( $i = 0; $i < $strlen; ++$i)
{
if ($string[$i]>"\x07F")
{ // Invalid char
$currentMap[$i+$startOffset]=$string[$i];
}
}
return $strlen;
}
/**
* Returns mapType
* @int mapType
*/
public function getMapType()
{
return self::MAP_TYPE_INVALID;
}
/**
* Returns an integer which specifies how many more bytes to read.
* A positive integer indicates the number of more bytes to fetch before invoking
* this method again.
* A value of zero means this is already a valid character.
* A value of -1 means this cannot possibly be a valid character.
* @param string $bytes
* @return int
*/
public function validateByteSequence($bytes, $size)
{
$byte = reset($bytes);
if (1 == count($bytes) && $byte >= 0x00 && $byte <= 0x7F)
{
return 0;
}
else
{
return -1;
}
}
/**
* Returns the number of bytes which should be read to start each character.
* @return int
*/
public function getInitialByteSize()
{
return 1;
}
}
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