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node_modules/handle-thing/lib/handle.js

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+var assert = require('assert')
+var util = require('util')
+
+var EventEmitter = require('events').EventEmitter
+var Buffer = require('buffer').Buffer
+
+var Queue = require('./queue')
+
+// Node.js version
+var match = /^v(\d+)\.(\d+)\./.exec(process.version)
+var version = match ? Number(match[1]) + Number('0.' + match[2]) : 11
+var onreadMode = version >= 11.1 ? 2 : 1
+var mode = 'modern'
+
+var setNRead
+if (onreadMode === 2) {
+  var sw = process.binding('stream_wrap')
+  setNRead = function (nread) {
+    sw.streamBaseState[sw.kReadBytesOrError] = nread
+  }
+}
+
+function Handle (stream, options) {
+  EventEmitter.call(this)
+
+  this._stream = stream
+  this._flowing = false
+  this._reading = false
+  this._options = options || {}
+
+  this.onread = null
+
+  // Pending requests
+  this.pending = new Queue()
+}
+util.inherits(Handle, EventEmitter)
+module.exports = Handle
+
+Handle.mode = mode
+
+Handle.create = function create (stream, options) {
+  return new Handle(stream, options)
+}
+
+Handle.prototype._onread = function _onread (nread, buffer) {
+  if (onreadMode === 1) {
+    this.onread(nread, buffer)
+  } else {
+    setNRead(nread)
+    this.onread(buffer)
+  }
+}
+
+Handle.prototype._queueReq = function _queueReq (type, req) {
+  return this.pending.append(type, req)
+}
+
+Handle.prototype._pendingList = function _pendingList () {
+  var list = []
+  while (!this.pending.isEmpty()) { list.push(this.pending.first().dequeue()) }
+  return list
+}
+
+Handle.prototype.setStream = function setStream (stream) {
+  assert(this._stream === null, 'Can\'t set stream two times')
+  this._stream = stream
+
+  this.emit('stream', stream)
+}
+
+Handle.prototype.readStart = function readStart () {
+  this._reading = true
+
+  if (!this._stream) {
+    this.once('stream', this.readStart)
+    return 0
+  }
+
+  if (!this._flowing) {
+    this._flowing = true
+    this._flow()
+  }
+
+  this._stream.resume()
+  return 0
+}
+
+Handle.prototype.readStop = function readStop () {
+  this._reading = false
+
+  if (!this._stream) {
+    this.once('stream', this.readStop)
+    return 0
+  }
+  this._stream.pause()
+  return 0
+}
+
+var uv = process.binding('uv')
+
+Handle.prototype._flow = function flow () {
+  var self = this
+  this._stream.on('data', function (chunk) {
+    self._onread(chunk.length, chunk)
+  })
+
+  this._stream.on('end', function () {
+    self._onread(uv.UV_EOF, Buffer.alloc(0))
+  })
+
+  this._stream.on('close', function () {
+    setImmediate(function () {
+      if (self._reading) {
+        self._onread(uv.UV_ECONNRESET, Buffer.alloc(0))
+      }
+    })
+  })
+}
+
+Handle.prototype._close = function _close () {
+  var list = this._pendingList()
+
+  var self = this
+  setImmediate(function () {
+    for (var i = 0; i < list.length; i++) {
+      var req = list[i]
+      req.oncomplete(uv.UV_ECANCELED, self, req)
+    }
+  })
+
+  this.readStop()
+}
+
+Handle.prototype.shutdown = function shutdown (req) {
+  var wrap = this._queueReq('shutdown', req)
+
+  if (!this._stream) {
+    this.once('stream', function () {
+      this._shutdown(wrap)
+    })
+    return 0
+  }
+
+  return this._shutdown(wrap)
+}
+
+Handle.prototype._shutdown = function _shutdown (wrap) {
+  var self = this
+  this._stream.end(function () {
+    var req = wrap.dequeue()
+    if (!req) { return }
+
+    req.oncomplete(0, self, req)
+  })
+  return 0
+}
+
+Handle.prototype.close = function close (callback) {
+  this._close()
+
+  if (!this._stream) {
+    this.once('stream', function () {
+      this.close(callback)
+    })
+    return 0
+  }
+
+  if (this._options.close) {
+    this._options.close(callback)
+  } else {
+    process.nextTick(callback)
+  }
+
+  return 0
+}
+
+Handle.prototype.writeEnc = function writeEnc (req, data, enc) {
+  var wrap = this._queueReq('write', req)
+
+  if (!this._stream) {
+    this.once('stream', function () {
+      this._writeEnc(wrap, req, data, enc)
+    })
+
+    return 0
+  }
+
+  return this._writeEnc(wrap, req, data, enc)
+}
+
+Handle.prototype._writeEnc = function _writeEnc (wrap, req, data, enc) {
+  var self = this
+
+  req.async = true
+  req.bytes = data.length
+
+  if (wrap.isEmpty()) {
+    return 0
+  }
+
+  this._stream.write(data, enc, function () {
+    var req = wrap.dequeue()
+    if (!req) { return }
+    req.oncomplete(0, self, req)
+  })
+
+  return 0
+}
+
+/**
+ * @param {WriteWrap} req
+ * @param {string[]} chunks
+ * @param {Boolean} allBuffers
+ */
+Handle.prototype.writev = function _writev (req, chunks, allBuffers) {
+  while (chunks.length > 0) {
+    this._stream.write(chunks.shift(), chunks.shift())
+  }
+  return 0
+}
+
+Handle.prototype.writeBuffer = function writeBuffer (req, data) {
+  return this.writeEnc(req, data, null)
+}
+
+Handle.prototype.writeAsciiString = function writeAsciiString (req, data) {
+  return this.writeEnc(req, data, 'ascii')
+}
+
+Handle.prototype.writeUtf8String = function writeUtf8String (req, data) {
+  return this.writeEnc(req, data, 'utf8')
+}
+
+Handle.prototype.writeUcs2String = function writeUcs2String (req, data) {
+  return this.writeEnc(req, data, 'ucs2')
+}
+
+Handle.prototype.writeBinaryString = function writeBinaryString (req, data) {
+  return this.writeEnc(req, data, 'binary')
+}
+
+Handle.prototype.writeLatin1String = function writeLatin1String (req, data) {
+  return this.writeEnc(req, data, 'binary')
+}
+
+// v0.8
+Handle.prototype.getsockname = function getsockname () {
+  if (this._options.getPeerName) {
+    return this._options.getPeerName()
+  }
+  return null
+}
+
+Handle.prototype.getpeername = function getpeername (out) {
+  var res = this.getsockname()
+  if (!res) { return -1 }
+
+  Object.keys(res).forEach(function (key) {
+    out[key] = res[key]
+  })
+
+  return 0
+}

node_modules/handle-thing/lib/queue.js

@@ -0,0 +1,48 @@
+function Queue () {
+  this.head = new Item('head', null)
+}
+module.exports = Queue
+
+Queue.prototype.append = function append (kind, value) {
+  var item = new Item(kind, value)
+  this.head.prepend(item)
+  return item
+}
+
+Queue.prototype.isEmpty = function isEmpty () {
+  return this.head.prev === this.head
+}
+
+Queue.prototype.first = function first () {
+  return this.head.next
+}
+
+function Item (kind, value) {
+  this.prev = this
+  this.next = this
+  this.kind = kind
+  this.value = value
+}
+
+Item.prototype.prepend = function prepend (other) {
+  other.prev = this.prev
+  other.next = this
+  other.prev.next = other
+  other.next.prev = other
+}
+
+Item.prototype.dequeue = function dequeue () {
+  var prev = this.prev
+  var next = this.next
+
+  prev.next = next
+  next.prev = prev
+  this.prev = this
+  this.next = this
+
+  return this.value
+}
+
+Item.prototype.isEmpty = function isEmpty () {
+  return this.prev === this
+}