added parser to prepare

Author: sushantdhiman

lib/packets/packet.js

@@ -350,7 +350,7 @@ Packet.prototype.readLengthCodedString = function () {
   }
   this.offset += len;
 
-  // becuase MySQL utf8 is actually cesu8
+  // because MySQL utf8 is actually cesu8
   // https://github.com/sidorares/node-mysql2/pull/374
   return StringParser.decode(this.buffer.slice(this.offset - len, this.offset), 'cesu8');
 };

lib/packets/prepare_statement.js

@@ -1,6 +1,7 @@
 var Buffer = require('safe-buffer').Buffer;
 var Packet = require('../packets/packet');
 var CommandCodes = require('../constants/commands');
+var StringParser = require('../parsers/string.js');
 
 function PrepareStatement (sql)
 {
@@ -9,7 +10,8 @@ function PrepareStatement (sql)
 
 PrepareStatement.prototype.toPacket = function ()
 {
-  var length = 5 + Buffer.byteLength(this.query, 'utf8');
+  var buf = StringParser.encode(this.query, 'cesu8');
+  var length = 5 + buf.length;
   var buffer = Buffer.allocUnsafe(length);
   var packet = new Packet(0, buffer, 0, length);
   packet.offset = 4;