1 files changed, 17 insertions, 41 deletions

diff --git a/deps/npm/node_modules/readable-stream/lib/_stream_writable.js b/deps/npm/node_modules/readable-stream/lib/_stream_writable.js
index fa5cb88701..575beb3c46 100644
--- a/deps/npm/node_modules/readable-stream/lib/_stream_writable.js
+++ b/deps/npm/node_modules/readable-stream/lib/_stream_writable.js
@@ -1,24 +1,3 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
 // A bit simpler than readable streams.
 // Implement an async ._write(chunk, encoding, cb), and it'll handle all
 // the drain event emission and buffering.
@@ -98,7 +77,7 @@ function WritableState(options, stream) {
   this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm;
 
   // cast to ints.
-  this.highWaterMark = ~ ~this.highWaterMark;
+  this.highWaterMark = ~~this.highWaterMark;
 
   // drain event flag.
   this.needDrain = false;
@@ -253,20 +232,16 @@ function writeAfterEnd(stream, cb) {
   processNextTick(cb, er);
 }
 
-// If we get something that is not a buffer, string, null, or undefined,
-// and we're not in objectMode, then that's an error.
-// Otherwise stream chunks are all considered to be of length=1, and the
-// watermarks determine how many objects to keep in the buffer, rather than
-// how many bytes or characters.
+// Checks that a user-supplied chunk is valid, especially for the particular
+// mode the stream is in. Currently this means that `null` is never accepted
+// and undefined/non-string values are only allowed in object mode.
 function validChunk(stream, state, chunk, cb) {
   var valid = true;
   var er = false;
-  // Always throw error if a null is written
-  // if we are not in object mode then throw
-  // if it is not a buffer, string, or undefined.
+
   if (chunk === null) {
     er = new TypeError('May not write null values to stream');
-  } else if (!Buffer.isBuffer(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+  } else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
     er = new TypeError('Invalid non-string/buffer chunk');
   }
   if (er) {
@@ -280,19 +255,20 @@ function validChunk(stream, state, chunk, cb) {
 Writable.prototype.write = function (chunk, encoding, cb) {
   var state = this._writableState;
   var ret = false;
+  var isBuf = Buffer.isBuffer(chunk);
 
   if (typeof encoding === 'function') {
     cb = encoding;
     encoding = null;
   }
 
-  if (Buffer.isBuffer(chunk)) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
+  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
 
   if (typeof cb !== 'function') cb = nop;
 
-  if (state.ended) writeAfterEnd(this, cb);else if (validChunk(this, state, chunk, cb)) {
+  if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
     state.pendingcb++;
-    ret = writeOrBuffer(this, state, chunk, encoding, cb);
+    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
   }
 
   return ret;
@@ -332,10 +308,11 @@ function decodeChunk(state, chunk, encoding) {
 // if we're already writing something, then just put this
 // in the queue, and wait our turn.  Otherwise, call _write
 // If we return false, then we need a drain event, so set that flag.
-function writeOrBuffer(stream, state, chunk, encoding, cb) {
-  chunk = decodeChunk(state, chunk, encoding);
-
-  if (Buffer.isBuffer(chunk)) encoding = 'buffer';
+function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
+  if (!isBuf) {
+    chunk = decodeChunk(state, chunk, encoding);
+    if (Buffer.isBuffer(chunk)) encoding = 'buffer';
+  }
   var len = state.objectMode ? 1 : chunk.length;
 
   state.length += len;
@@ -404,8 +381,8 @@ function onwrite(stream, er) {
       asyncWrite(afterWrite, stream, state, finished, cb);
       /*</replacement>*/
     } else {
-        afterWrite(stream, state, finished, cb);
-      }
+      afterWrite(stream, state, finished, cb);
+    }
   }
 }
 
@@ -556,7 +533,6 @@ function CorkedRequest(state) {
 
   this.next = null;
   this.entry = null;
-
   this.finish = function (err) {
     var entry = _this.entry;
     _this.entry = null;