refactor ltgt encoding

Author: juliangruber

lib/levelup.js

@@ -351,24 +351,13 @@ LevelUP.prototype.createReadStream = function (options) {
   options.keyEncoding   = options.keyEncoding
   options.valueEncoding = options.valueEncoding
 
-  if (isDefined(options.start))
-    options.start = this._codec.encodeKey(options.start, [options])
-  if (isDefined(options.end))
-    options.end = this._codec.encodeKey(options.end, [options])
-  if (isDefined(options.gte))
-    options.gte = this._codec.encodeKey(options.gte, [options])
-  if (isDefined(options.gt))
-    options.gt = this._codec.encodeKey(options.gt, [options])
-  if (isDefined(options.lte))
-    options.lte = this._codec.encodeKey(options.lte, [options])
-  if (isDefined(options.lt))
-    options.lt = this._codec.encodeKey(options.lt, [options])
-  if ('number' !== typeof options.limit)
-    options.limit = -1
-
+  options = this._codec.encodeLtgt(options);
   options.keyAsBuffer   = this._codec.keyAsBuffer([options])
   options.valueAsBuffer = this._codec.valueAsBuffer([options])
 
+  if ('number' !== typeof options.limit)
+    options.limit = -1
+
   var makeData = options.keys && options.values
     ? function (key, value) {
         return {

package.json

@@ -35,7 +35,7 @@
   "main": "lib/levelup.js",
   "dependencies": {
     "deferred-leveldown": "^0.3.0",
-    "level-codec": "^5.0.0",
+    "level-codec": "^5.4.0",
     "level-errors": "~1.0.3",
     "prr": "~0.0.0",
     "readable-stream": "~1.0.26",