From 5beee200388fd9bbdfcb7fc24f25f4178f77a65d Mon Sep 17 00:00:00 2001
From: Daniel Cousens <github@dcousens.com>
Date: Mon, 2 Mar 2015 16:47:26 +1100
Subject: [PATCH] bufferutils: add equal

---
 src/bufferutils.js  | 11 +++++++++++
 test/bufferutils.js | 16 ++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/src/bufferutils.js b/src/bufferutils.js
index 02c9594..afe03e6 100644
--- a/src/bufferutils.js
+++ b/src/bufferutils.js
@@ -165,6 +165,16 @@ function varIntBuffer (i) {
   return buffer
 }
 
+function equal (a, b) {
+  if (a.length !== b.length) return false
+
+  for (var i = 0; i < a.length; ++i) {
+    if (a[i] !== b[i]) return false
+  }
+
+  return true
+}
+
 function reverse (buffer) {
   var buffer2 = new Buffer(buffer)
   Array.prototype.reverse.call(buffer2)
@@ -172,6 +182,7 @@ function reverse (buffer) {
 }
 
 module.exports = {
+  equal: equal,
   pushDataSize: pushDataSize,
   readPushDataInt: readPushDataInt,
   readUInt64LE: readUInt64LE,
diff --git a/test/bufferutils.js b/test/bufferutils.js
index a41e2a7..485447b 100644
--- a/test/bufferutils.js
+++ b/test/bufferutils.js
@@ -77,6 +77,22 @@ describe('bufferutils', function () {
     })
   })
 
+  describe('equal', function () {
+    fixtures.valid.forEach(function (f) {
+      describe('for ' + f.hexVI, function () {
+        fixtures.valid.forEach(function (f2) {
+          it('equates the string comparison: ' + f.hexVI + ' === ' + f2.hexVI, function () {
+            var a = new Buffer(f.hexVI, 'hex')
+            var b = new Buffer(f2.hexVI, 'hex')
+            var expected = f.hexVI === f2.hexVI
+
+            assert.equal(bufferutils.equal(a, b), expected)
+          })
+        })
+      })
+    })
+  })
+
   describe('reverse', function () {
     fixtures.valid.forEach(function (f) {
       it('reverses ' + f.hex64 + ' correctly', function () {