Change decode to use prototype instead of closure

decode.js

@@ -1,31 +1,33 @@
-module.exports = decoder
+module.exports = Decoder
 
 var MSB = 0x80
   , REST = 0x7F
 
 
-function decoder(emit) {
-  var accum = []
-  return function (byte) {
-    var msb = byte & MSB
-      , len
-      , out
-  
-    accum[accum.length] = byte & REST
-    if(msb) {
-      return
-    }
-  
-    len = accum.length
-    out = 0
-  
-    for(var i = 0; i < len; ++i) {
-      out |= accum[i] << (7 * i)
-    }
-  
-    accum.length = 0
-    emit(out)
+function Decoder() {
+  this.accum = []
+}
+Decoder.prototype.write = write;
+
+function write(byte) {
+  var msb = byte & MSB
+    , accum = this.accum
+    , len
+    , out
+
+  accum[accum.length] = byte & REST
+  if(msb) {
     return
-    
   }
+
+  len = accum.length
+  out = 0
+
+  for(var i = 0; i < len; ++i) {
+    out |= accum[i] << (7 * i)
+  }
+
+  accum.length = 0
+  this.ondata(out)
+  return
 }

index.js

@@ -3,14 +3,19 @@ module.exports = varint
 varint.encode = require('./encode.js');
 
 var EE = require('events').EventEmitter
-  , decoder = require('./decode.js')
+  , Decoder = require('./decode.js')
 
 function varint() {
   var ee = new EE
+    , dec = new Decoder
 
-  ee.write = decoder(function (item) {
+  dec.ondata = function (item) {
     ee.emit("data", item)
-  })
+  }
+
+  ee.write = function (item) {
+    dec.write(item);
+  }
 
   return ee
 }