From 94528f510e431dfd9003799510ea404a3dde703e Mon Sep 17 00:00:00 2001
From: Denys Otrishko <shishugi@gmail.com>
Date: Sun, 23 Aug 2020 11:32:40 +0300
Subject: [PATCH] zlib: replace usage of internal stream state with public api

Refs: https://github.com/nodejs/node/issues/445

PR-URL: https://github.com/nodejs/node/pull/34884
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
---
 lib/zlib.js | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/lib/zlib.js b/lib/zlib.js
index 829a472e35b6a4..609c50afd52f22 100644
--- a/lib/zlib.js
+++ b/lib/zlib.js
@@ -355,17 +355,15 @@ const kFlushBuffers = [];
 }
 
 ZlibBase.prototype.flush = function(kind, callback) {
-  const ws = this._writableState;
-
   if (typeof kind === 'function' || (kind === undefined && !callback)) {
     callback = kind;
     kind = this._defaultFullFlushFlag;
   }
 
-  if (ws.ended) {
+  if (this.writableFinished) {
     if (callback)
       process.nextTick(callback);
-  } else if (ws.ending) {
+  } else if (this.writableEnded) {
     if (callback)
       this.once('end', callback);
   } else {
@@ -392,8 +390,7 @@ ZlibBase.prototype._transform = function(chunk, encoding, cb) {
   }
 
   // For the last chunk, also apply `_finishFlushFlag`.
-  const ws = this._writableState;
-  if ((ws.ending || ws.ended) && ws.length === chunk.byteLength) {
+  if (this.writableEnded && this.writableLength === chunk.byteLength) {
     flushFlag = maxFlush(flushFlag, this._finishFlushFlag);
   }
   processChunk(this, chunk, flushFlag, cb);