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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 <[email protected]>
*/
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 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.
*/
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()
*/
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:
$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 $length
*
* @return int[]
*/
public function readBytes($length)
{
$read = $this->read($length);
if (false !== $read) {
$ret = array_map('ord', str_split($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 = [];
$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 (false !== $ignored) {
$this->datasSize = \strlen($this->datas) - \strlen($ignored);
} else {
$this->datasSize = \strlen($this->datas);
}
}
}