/**
* {@inheritdoc}
*/
public function read(int $length = 0, string $byte = null, float $timeout = 0) : \Generator
{
if (!$this->isReadable()) {
throw new UnreadableException('The stream is no longer readable.');
}
if (0 > $length) {
throw new InvalidArgumentError('The length should be a positive integer.');
}
$byte = strlen($byte) ? $byte[0] : null;
if (null !== $byte) {
$data = '';
$i = 0;
do {
$char = $this->iterator->current();
$this->iterator->next();
$data .= $char;
} while ($char !== $byte && (0 === $length || ++$i < $length) && $this->iterator->valid());
return $data;
}
if (0 === $length) {
$length = $this->buffer->getLength();
}
$position = $this->iterator->key();
$data = $this->buffer->peek($length, $position);
$position = $length + $position;
if ($position > $this->buffer->getLength()) {
$position = $this->buffer->getLength();
}
$this->iterator->seek($position);
return $data;
yield;
// Unreachable, but makes the method a coroutine.
}
