Adding upstream version 0.11.0.upstream/0.11.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 168 insertions, 0 deletions

diff --git a/vendor/react/stream/src/WritableResourceStream.php b/vendor/react/stream/src/WritableResourceStream.php
new file mode 100644
index 0000000..1af16b1
--- /dev/null
+++ b/vendor/react/stream/src/WritableResourceStream.php
@@ -0,0 +1,168 @@
+<?php
+
+namespace React\Stream;
+
+use Evenement\EventEmitter;
+use React\EventLoop\Loop;
+use React\EventLoop\LoopInterface;
+
+final class WritableResourceStream extends EventEmitter implements WritableStreamInterface
+{
+    private $stream;
+
+    /** @var LoopInterface */
+    private $loop;
+
+    /**
+     * @var int
+     */
+    private $softLimit;
+
+    /**
+     * @var int
+     */
+    private $writeChunkSize;
+
+    private $listening = false;
+    private $writable = true;
+    private $closed = false;
+    private $data = '';
+
+    public function __construct($stream, LoopInterface $loop = null, $writeBufferSoftLimit = null, $writeChunkSize = null)
+    {
+        if (!\is_resource($stream) || \get_resource_type($stream) !== "stream") {
+            throw new \InvalidArgumentException('First parameter must be a valid stream resource');
+        }
+
+        // ensure resource is opened for writing (fopen mode must contain either of "waxc+")
+        $meta = \stream_get_meta_data($stream);
+        if (isset($meta['mode']) && $meta['mode'] !== '' && \strtr($meta['mode'], 'waxc+', '.....') === $meta['mode']) {
+            throw new \InvalidArgumentException('Given stream resource is not opened in write mode');
+        }
+
+        // this class relies on non-blocking I/O in order to not interrupt the event loop
+        // e.g. pipes on Windows do not support this: https://bugs.php.net/bug.php?id=47918
+        if (\stream_set_blocking($stream, false) !== true) {
+            throw new \RuntimeException('Unable to set stream resource to non-blocking mode');
+        }
+
+        $this->stream = $stream;
+        $this->loop = $loop ?: Loop::get();
+        $this->softLimit = ($writeBufferSoftLimit === null) ? 65536 : (int)$writeBufferSoftLimit;
+        $this->writeChunkSize = ($writeChunkSize === null) ? -1 : (int)$writeChunkSize;
+    }
+
+    public function isWritable()
+    {
+        return $this->writable;
+    }
+
+    public function write($data)
+    {
+        if (!$this->writable) {
+            return false;
+        }
+
+        $this->data .= $data;
+
+        if (!$this->listening && $this->data !== '') {
+            $this->listening = true;
+
+            $this->loop->addWriteStream($this->stream, array($this, 'handleWrite'));
+        }
+
+        return !isset($this->data[$this->softLimit - 1]);
+    }
+
+    public function end($data = null)
+    {
+        if (null !== $data) {
+            $this->write($data);
+        }
+
+        $this->writable = false;
+
+        // close immediately if buffer is already empty
+        // otherwise wait for buffer to flush first
+        if ($this->data === '') {
+            $this->close();
+        }
+    }
+
+    public function close()
+    {
+        if ($this->closed) {
+            return;
+        }
+
+        if ($this->listening) {
+            $this->listening = false;
+            $this->loop->removeWriteStream($this->stream);
+        }
+
+        $this->closed = true;
+        $this->writable = false;
+        $this->data = '';
+
+        $this->emit('close');
+        $this->removeAllListeners();
+
+        if (\is_resource($this->stream)) {
+            \fclose($this->stream);
+        }
+    }
+
+    /** @internal */
+    public function handleWrite()
+    {
+        $error = null;
+        \set_error_handler(function ($_, $errstr) use (&$error) {
+            $error = $errstr;
+        });
+
+        if ($this->writeChunkSize === -1) {
+            $sent = \fwrite($this->stream, $this->data);
+        } else {
+            $sent = \fwrite($this->stream, $this->data, $this->writeChunkSize);
+        }
+
+        \restore_error_handler();
+
+        // Only report errors if *nothing* could be sent and an error has been raised.
+        // Ignore non-fatal warnings if *some* data could be sent.
+        // Any hard (permanent) error will fail to send any data at all.
+        // Sending excessive amounts of data will only flush *some* data and then
+        // report a temporary error (EAGAIN) which we do not raise here in order
+        // to keep the stream open for further tries to write.
+        // Should this turn out to be a permanent error later, it will eventually
+        // send *nothing* and we can detect this.
+        if (($sent === 0 || $sent === false) && $error !== null) {
+            $this->emit('error', array(new \RuntimeException('Unable to write to stream: ' . $error)));
+            $this->close();
+
+            return;
+        }
+
+        $exceeded = isset($this->data[$this->softLimit - 1]);
+        $this->data = (string) \substr($this->data, $sent);
+
+        // buffer has been above limit and is now below limit
+        if ($exceeded && !isset($this->data[$this->softLimit - 1])) {
+            $this->emit('drain');
+        }
+
+        // buffer is now completely empty => stop trying to write
+        if ($this->data === '') {
+            // stop waiting for resource to be writable
+            if ($this->listening) {
+                $this->loop->removeWriteStream($this->stream);
+                $this->listening = false;
+            }
+
+            // buffer is end()ing and now completely empty => close buffer
+            if (!$this->writable) {
+                $this->close();
+            }
+        }
+    }
+}