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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.
*/
/**
* A CharacterStream implementation which stores characters in an internal array.
*
* @author Xavier De Cock <xdecock@gmail.com>
*/
class Swift_CharacterStream_NgCharacterStream implements Swift_CharacterStream
{
/**
* The char reader (lazy-loaded) for the current charset.
*
* @var Swift_CharacterReader
*/
private $_charReader;
/**
* A factory for creating CharacterReader instances.
*
* @var Swift_CharacterReaderFactory
*/
private $_charReaderFactory;
/**
* The character set this stream is using.
*
* @var string
*/
private $_charset;
/**
* The data's stored as-is.
*
* @var string
*/
private $_datas = '';
/**
* Number of bytes in the stream
*
* @var int
*/
private $_datasSize = 0;
/**
* Map.
*
* @var mixed
*/
private $_map;
/**
* Map Type.
*
* @var int
*/
private $_mapType = 0;
/**
* Number of characters in the stream.
*
* @var int
*/
private $_charCount = 0;
/**
* Position in the stream.
*
* @var int
*/
private $_currentPos = 0;
/**
* Constructor.
*
* @param Swift_CharacterReaderFactory $factory
* @param string $charset
*/
public function __construct(Swift_CharacterReaderFactory $factory, $charset)
{
$this->setCharacterReaderFactory($factory);
$this->setCharacterSet($charset);
}
/* -- Changing parameters of the stream -- */
/**
* Set the character set used in this CharacterStream.
*
* @param string $charset
*/
public function setCharacterSet($charset)
{
$this->_charset = $charset;
$this->_charReader = null;
$this->_mapType = 0;
}
/**
* Set the CharacterReaderFactory for multi charset support.
*
* @param Swift_CharacterReaderFactory $factory
*/
public function setCharacterReaderFactory(Swift_CharacterReaderFactory $factory)
{
$this->_charReaderFactory = $factory;
}
/**
* @see Swift_CharacterStream::flushContents()
*/
public function flushContents()
{
$this->_datas = null;
$this->_map = null;
$this->_charCount = 0;
$this->_currentPos = 0;
$this->_datasSize = 0;
}
/**
* @see Swift_CharacterStream::importByteStream()
*
* @param Swift_OutputByteStream $os
*/
public function importByteStream(Swift_OutputByteStream $os)
{
$this->flushContents();
$blocks = 512;
$os->setReadPointer(0);
while (false !== ($read = $os->read($blocks))) {
$this->write($read);
}
}
/**
* @see Swift_CharacterStream::importString()
*
* @param string $string
*/
public function importString($string)
{
$this->flushContents();
$this->write($string);
}
/**
* @see Swift_CharacterStream::read()
*
* @param int $length
*
* @return string
*/
public function read($length)
{
if ($this->_currentPos >= $this->_charCount) {
return false;
}
$ret = false;
$length = ($this->_currentPos+$length > $this->_charCount)
? $this->_charCount - $this->_currentPos
: $length;
switch ($this->_mapType) {
case Swift_CharacterReader::MAP_TYPE_FIXED_LEN:
$len = $length*$this->_map;
$ret = substr($this->_datas,
$this->_currentPos * $this->_map,
$len);
$this->_currentPos += $length;
break;
case Swift_CharacterReader::MAP_TYPE_INVALID:
$end = $this->_currentPos + $length;
$end = $end > $this->_charCount
? $this->_charCount
: $end;
$ret = '';
for (; $this->_currentPos < $length; ++$this->_currentPos) {
if (isset ($this->_map[$this->_currentPos])) {
$ret .= '?';
} else {
$ret .= $this->_datas[$this->_currentPos];
}
}
break;
case Swift_CharacterReader::MAP_TYPE_POSITIONS:
$end = $this->_currentPos + $length;
$end = $end > $this->_charCount
? $this->_charCount
: $end;
$ret = '';
$start = 0;
if ($this->_currentPos>0) {
$start = $this->_map['p'][$this->_currentPos-1];
}
$to = $start;
for (; $this->_currentPos < $end; ++$this->_currentPos) {
if (isset($this->_map['i'][$this->_currentPos])) {
$ret .= substr($this->_datas, $start, $to - $start).'?';
$start = $this->_map['p'][$this->_currentPos];
} else {
$to = $this->_map['p'][$this->_currentPos];
}
}
$ret .= substr($this->_datas, $start, $to - $start);
break;
}
return $ret;
}
/**
* @see Swift_CharacterStream::readBytes()
*
* @param int $length
*
* @return integer[]
*/
public function readBytes($length)
{
$read = $this->read($length);
if ($read !== false) {
$ret = array_map('ord', str_split($read, 1));
return $ret;
}
return false;
}
/**
* @see Swift_CharacterStream::setPointer()
*
* @param int $charOffset
*/
public function setPointer($charOffset)
{
if ($this->_charCount<$charOffset) {
$charOffset = $this->_charCount;
}
$this->_currentPos = $charOffset;
}
/**
* @see Swift_CharacterStream::write()
*
* @param string $chars
*/
public function write($chars)
{
if (!isset($this->_charReader)) {
$this->_charReader = $this->_charReaderFactory->getReaderFor(
$this->_charset);
$this->_map = array();
$this->_mapType = $this->_charReader->getMapType();
}
$ignored = '';
$this->_datas .= $chars;
$this->_charCount += $this->_charReader->getCharPositions(substr($this->_datas, $this->_datasSize), $this->_datasSize, $this->_map, $ignored);
if ($ignored !== false) {
$this->_datasSize = strlen($this->_datas)-strlen($ignored);
} else {
$this->_datasSize = strlen($this->_datas);
}
}
}
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