From 7237e9d34a61629d5bedce3b9cc46c8a1344d78a Mon Sep 17 00:00:00 2001
From: "Kevin (Kun) \"Kassimo\" Qian" <kevinkassimo@gmail.com>
Date: Wed, 1 May 2019 02:08:12 -0700
Subject: fs: add Deno.utime/Deno.utimeSync (#2241)

---
 js/util.ts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'js/util.ts')

diff --git a/js/util.ts b/js/util.ts
index 033a2f754..a035d761a 100644
--- a/js/util.ts
+++ b/js/util.ts
@@ -192,3 +192,18 @@ export function hasOwnProperty<T>(obj: T, v: PropertyKey): boolean {
   }
   return Object.prototype.hasOwnProperty.call(obj, v);
 }
+
+/**
+ * Split a number into two parts: lower 32 bit and higher 32 bit
+ * (as if the number is represented as uint64.)
+ *
+ * @param n Number to split.
+ * @internal
+ */
+export function splitNumberToParts(n: number): number[] {
+  // JS bitwise operators (OR, SHIFT) operate as if number is uint32.
+  const lower = n | 0;
+  // This is also faster than Math.floor(n / 0x100000000) in V8.
+  const higher = (n - lower) / 0x100000000;
+  return [lower, higher];
+}
-- 
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