From d1853b2e5280f099d8c2f619d5518e68d3155ea9 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sun, 18 May 2014 10:24:10 -0500
Subject: [PATCH] util: simplify 64bit writes using bn.js.

Signed-off-by: Fedor Indutny <fedor@indutny.com>
---
 lib/bcoin/utils.js | 32 ++++++--------------------------
 1 file changed, 6 insertions(+), 26 deletions(-)

diff --git a/lib/bcoin/utils.js b/lib/bcoin/utils.js
index 92841158..319b00f8 100644
--- a/lib/bcoin/utils.js
+++ b/lib/bcoin/utils.js
@@ -180,19 +180,9 @@ utils.writeU64 = function writeU64(dst, num, off) {
   if (!off)
     off = 0;
 
-  var num = new bn(num);
-  var left = +num.shrn(32).toString(10);
-  var right = +num.maskn(32).toString(10);
-
-  dst[off] = right & 0xff;
-  dst[off + 1] = (right >>> 8) & 0xff;
-  dst[off + 2] = (right >>> 16) & 0xff;
-  dst[off + 3] = (right >>> 24) & 0xff;
-
-  dst[off + 4] = left & 0xff;
-  dst[off + 5] = (left >>> 8) & 0xff;
-  dst[off + 6] = (left >>> 16) & 0xff;
-  dst[off + 7] = (left >>> 24) & 0xff;
+  new bn(num).toArray().reverse().forEach(function(ch, i) {
+    dst[off + i] = ch;
+  });
 
   return 8;
 };
@@ -219,19 +209,9 @@ utils.writeU64BE = function writeU64BE(dst, num, off) {
   if (!off)
     off = 0;
 
-  var num = new bn(num);
-  var left = +num.shrn(32).toString(10);
-  var right = +num.maskn(32).toString(10);
-
-  dst[off] = (left >>> 24) & 0xff;
-  dst[off + 1] = (left >>> 16) & 0xff;
-  dst[off + 2] = (left >>> 8) & 0xff;
-  dst[off + 3] = left & 0xff;
-
-  dst[off + 4] = (right >>> 24) & 0xff;
-  dst[off + 5] = (right >>> 16) & 0xff;
-  dst[off + 6] = (right >>> 8) & 0xff;
-  dst[off + 7] = right & 0xff;
+  new bn(num).toArray().forEach(function(ch, i) {
+    dst[off + i] = ch;
+  });
 
   return 8;
 };