From abdcbf1fb26cb421574b459d02f812da0fb6d2df Mon Sep 17 00:00:00 2001
From: Ilya Gorbunov <ilya.gorbunov@jetbrains.com>
Date: Thu, 14 Sep 2017 17:43:51 +0300
Subject: [PATCH] Refactor: use the same arraybuffer to compute double hashcode

---
 js/js.libraries/src/js/core.js | 34 +---------------------------------
 js/js.libraries/src/js/misc.js | 10 ++++++++++
 2 files changed, 11 insertions(+), 33 deletions(-)

diff --git a/js/js.libraries/src/js/core.js b/js/js.libraries/src/js/core.js
index 6b3e4b3bf12..73fae6e0600 100644
--- a/js/js.libraries/src/js/core.js
+++ b/js/js.libraries/src/js/core.js
@@ -46,7 +46,7 @@ Kotlin.hashCode = function (obj) {
         return getObjectHashCode(obj);
     }
     if ("number" === objType) {
-        return numberHashCode(obj);
+        return Kotlin.numberHashCode(obj);
     }
     if ("boolean" === objType) {
         return Number(obj)
@@ -56,38 +56,6 @@ Kotlin.hashCode = function (obj) {
     return getStringHashCode(str);
 };
 
-var numberHashCode;
-
-if (typeof ArrayBuffer === "function") {
-    var bufferForNumberConversion = new ArrayBuffer(8);
-    var arrayForDoubleConversion = new Float64Array(bufferForNumberConversion);
-    var arrayForIntegerConversion = new Int32Array(bufferForNumberConversion);
-
-    // Detect endiannes of ArrayBuffer
-    var lowerIntegerIndex = 0;
-    var upperIntegerIndex = 1;
-    (function() {
-        arrayForDoubleConversion[0] = 1.2;
-        if (arrayForIntegerConversion[0] !== 0x3FF33333) {
-            lowerIntegerIndex = 1;
-            upperIntegerIndex = 0;
-        }
-    })();
-    numberHashCode = function(obj) {
-        if ((obj | 0) === obj) {
-            return obj | 0;
-        }
-        else {
-            arrayForDoubleConversion[0] = obj;
-            return (arrayForIntegerConversion[lowerIntegerIndex] * 31 | 0) + arrayForIntegerConversion[upperIntegerIndex] | 0;
-        }
-    }
-}
-else {
-    numberHashCode = function(obj) {
-        return obj | 0;
-    }
-}
 
 Kotlin.toString = function (o) {
     if (o == null) {
diff --git a/js/js.libraries/src/js/misc.js b/js/js.libraries/src/js/misc.js
index 3491df9d43b..da39744daeb 100644
--- a/js/js.libraries/src/js/misc.js
+++ b/js/js.libraries/src/js/misc.js
@@ -97,6 +97,16 @@ function imul(a, b) {
         bufFloat64[0] = value;
         return bufInt32[highIndex] & 0x80000000;
     };
+
+    Kotlin.numberHashCode = function(obj) {
+        if ((obj | 0) === obj) {
+            return obj | 0;
+        }
+        else {
+            bufFloat64[0] = obj;
+            return (bufInt32[highIndex] * 31 | 0) + bufInt32[lowIndex] | 0;
+        }
+    }
 })();