fixup! stream: refactor to use more primordials

Author: aduh95

lib/internal/streams/buffer_list.js

@@ -5,7 +5,6 @@ const {
   SymbolIterator,
   Uint8Array,
   TypedArrayPrototypeSet,
-  TypedArrayPrototypeSlice,
 } = primordials;
 
 const { Buffer } = require('buffer');
@@ -81,11 +80,10 @@ module.exports = class BufferList {
   consume(n, hasStrings) {
     const data = this.head.data;
     if (n < data.length) {
-      const slice = typeof data === 'string' ?
-        StringPrototypeSlice :
-        TypedArrayPrototypeSlice;
-      this.head.data = slice(data, n);
-      return slice(data, 0, n);
+      // `slice` is the same for buffers and strings.
+      const slice = data.slice(0, n);
+      this.head.data = data.slice(n);
+      return slice;
     }
     if (n === data.length) {
       // First chunk is a perfect match.
@@ -160,7 +158,7 @@ module.exports = class BufferList {
                                  new Uint8Array(buf.buffer, buf.byteOffset, n),
                                  retLen - n);
           this.head = p;
-          p.data = TypedArrayPrototypeSlice(buf, n);
+          p.data = buf.slice(n);
         }
         break;
       }

lib/internal/streams/duplex.js

@@ -27,7 +27,6 @@
 'use strict';
 
 const {
-  FunctionPrototypeCall,
   ObjectDefineProperties,
   ObjectGetOwnPropertyDescriptor,
   ObjectKeys,
@@ -54,8 +53,8 @@ function Duplex(options) {
   if (!(this instanceof Duplex))
     return new Duplex(options);
 
-  FunctionPrototypeCall(Readable, this, options);
-  FunctionPrototypeCall(Writable, this, options);
+  Readable.call(this, options);
+  Writable.call(this, options);
   this.allowHalfOpen = true;
 
   if (options) {

lib/internal/streams/lazy_transform.js

@@ -4,10 +4,10 @@
 'use strict';
 
 const {
+  FunctionPrototypeCall,
   ObjectDefineProperties,
   ObjectDefineProperty,
   ObjectSetPrototypeOf,
-  ReflectApply,
 } = primordials;
 
 const stream = require('stream');
@@ -26,7 +26,7 @@ ObjectSetPrototypeOf(LazyTransform, stream.Transform);
 
 function makeGetter(name) {
   return function() {
-    ReflectApply(stream.Transform, this, [this._options]);
+    FunctionPrototypeCall(stream.Transform, this, this._options);
     this._writableState.decodeStrings = false;
 
     if (!this._options || !this._options.defaultEncoding) {

lib/internal/streams/readable.js

@@ -207,7 +207,7 @@ function Readable(options) {
       addAbortSignalNoValidate(options.signal, this);
   }
 
-  ReflectApply(Stream, this, [options]);
+  FunctionPrototypeCall(Stream, this, options);
 
   destroyImpl.construct(this, () => {
     maybeReadMore(this, this._readableState);
@@ -874,7 +874,7 @@ Readable.prototype.unpipe = function(dest) {
 // Set up data events if they are asked for
 // Ensure readable listeners eventually get something.
 Readable.prototype.on = function(ev, fn) {
-  const res = ReflectApply(Stream.prototype.on, this, [ev, fn]);
+  const res = FunctionPrototypeCall(Stream.prototype.on, this, ev, fn);
   const state = this._readableState;
 
   if (ev === 'data') {
@@ -904,7 +904,8 @@ Readable.prototype.on = function(ev, fn) {
 Readable.prototype.addListener = Readable.prototype.on;
 
 Readable.prototype.removeListener = function(ev, fn) {
-  const res = ReflectApply(Stream.prototype.removeListener, this, [ev, fn]);
+  const res = FunctionPrototypeCall(Stream.prototype.removeListener, this,
+                                    ev, fn);
 
   if (ev === 'readable') {
     // We need to check if there is someone still listening to

lib/internal/streams/transform.js

@@ -83,7 +83,7 @@ function Transform(options) {
   if (!(this instanceof Transform))
     return new Transform(options);
 
-  FunctionPrototypeCall(Duplex, this, options);
+  Duplex.call(this, options);
 
   // We have implemented the _read method, and done the other things
   // that Readable wants before the first _read call, so unset the

lib/internal/streams/writable.js

@@ -29,14 +29,11 @@ const {
   ArrayPrototypePush,
   ArrayPrototypeSlice,
   ArrayPrototypeSplice,
-  FunctionPrototype,
-  FunctionPrototypeBind,
   FunctionPrototypeCall,
   FunctionPrototypeSymbolHasInstance,
   ObjectDefineProperty,
   ObjectDefineProperties,
   ObjectSetPrototypeOf,
-  ReflectApply,
   StringPrototypeToLowerCase,
   Symbol,
   SymbolHasInstance,
@@ -76,7 +73,7 @@ const { errorOrDestroy } = destroyImpl;
 ObjectSetPrototypeOf(Writable.prototype, Stream.prototype);
 ObjectSetPrototypeOf(Writable, Stream);
 
-const nop = FunctionPrototype;
+function nop() {}
 
 const kOnFinished = Symbol('kOnFinished');
 
@@ -153,7 +150,7 @@ function WritableState(options, stream, isDuplex) {
   this.bufferProcessing = false;
 
   // The callback that's passed to _write(chunk, cb).
-  this.onwrite = FunctionPrototypeBind(onwrite, undefined, stream);
+  this.onwrite = onwrite.bind(undefined, stream);
 
   // The callback that the user supplies to write(chunk, encoding, cb).
   this.writecb = null;
@@ -272,6 +269,16 @@ function Writable(options) {
   });
 }
 
+ObjectDefineProperty(Writable, SymbolHasInstance, {
+  value: function(object) {
+    if (FunctionPrototypeSymbolHasInstance(this, object)) return true;
+    if (this !== Writable) return false;
+
+    return object && object._writableState instanceof WritableState;
+  },
+});
+
+
 // Otherwise people can pipe Writable streams, which is just wrong.
 Writable.prototype.pipe = function() {
   errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());
@@ -367,7 +374,7 @@ function writeOrBuffer(stream, state, chunk, encoding, callback) {
     state.needDrain = true;
 
   if (state.writing || state.corked || state.errored || !state.constructed) {
-    ArrayPrototypePush(state.buffered, { chunk, encoding, callback });
+    state.buffered.push({ chunk, encoding, callback });
     if (state.allBuffers && encoding !== 'buffer') {
       state.allBuffers = false;
     }
@@ -841,7 +848,7 @@ Writable.prototype.destroy = function(err, cb) {
     process.nextTick(errorBuffer, state);
   }
 
-  ReflectApply(destroy, this, [err, cb]);
+  FunctionPrototypeCall(destroy, this, err, cb);
   return this;
 };