bufferutils: add varIntBuffer

src/bufferutils.js

@@ -159,6 +159,14 @@ function writeVarInt(buffer, number, offset) {
   return size
 }
 
+function varIntBuffer(i) {
+  var size = varIntSize(i)
+  var buffer = new Buffer(size)
+  writeVarInt(buffer, i, 0)
+
+  return buffer
+}
+
 function reverse(buffer) {
   var buffer2 = new Buffer(buffer)
   Array.prototype.reverse.call(buffer2)
@@ -171,6 +179,7 @@ module.exports = {
   readUInt64LE: readUInt64LE,
   readVarInt: readVarInt,
   reverse: reverse,
+  varIntBuffer: varIntBuffer,
   varIntSize: varIntSize,
   writePushDataInt: writePushDataInt,
   writeUInt64LE: writeUInt64LE,