/**
* @coroutine
*
* Flushes the contents of the internal buffer to the underlying stream.
*
* @return \Generator
*
* @resolve int Number of bytes written to the stream.
*
* @throws \Icicle\Awaitable\Exception\TimeoutException If the operation times out.
* @throws \Icicle\Stream\Exception\UnwritableException If the stream is no longer writable.
* @throws \Icicle\Stream\Exception\ClosedException If the stream is unexpectedly closed.
*/
public function flush() : \Generator
{
if ($this->buffer->isEmpty()) {
return 0;
}
return yield from $this->stream->write($this->buffer->drain(), $this->timeout);
}
/**
* Returns bytes from the buffer based on the current length or current search byte.
*
* @return string
*/
private function remove() : string
{
if (null !== $this->byte && false !== ($position = $this->buffer->search($this->byte))) {
if (0 === $this->length || $position < $this->length) {
return $this->buffer->shift($position + 1);
}
return $this->buffer->shift($this->length);
}
if (0 === $this->length) {
return $this->buffer->drain();
}
return $this->buffer->shift($this->length);
}
