<?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.
*/
/**
* Analyzes US-ASCII characters.
*
* @author Chris Corbyn
*/
class Swift_CharacterReader_UsAsciiReader implements Swift_CharacterReader
{
/**
* Returns the complete character map.
*
* @param string $string
* @param int $startOffset
* @param array $currentMap
* @param string $ignoredChars
*
* @return int
*/
public function getCharPositions($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.
*
* @return 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
* @param int $size
*
* @return int
*/
public function validateByteSequence($bytes, $size)
{
$byte = reset($bytes);
if (1 == count($bytes) && $byte >= 0x00 && $byte <= 0x7F) {
return 0;
}
return -1;
}
/**
* Returns the number of bytes which should be read to start each character.
*
* @return int
*/
public function getInitialByteSize()
{
return 1;
}
}