优化：proto支持空数组

.gitignore

@@ -1,3 +1,4 @@
 node_modules/*
 *.log
-.DS_Store
+.DS_Store
+*.idea

lib/client/protobuf.js

@@ -584,13 +584,17 @@
   }
 
   function decodeArray(array, type, protos){
-    if(util.isSimpleType(type)){
-      var length = codec.decodeUInt32(getBytes());
-
-      for(var i = 0; i < length; i++){
+    var length = codec.decodeUInt32(peekBytes());
+    if(length === 0){
+      getBytes();// 纯偏移
+      return ;
+    }
+    if (util.isSimpleType(type)) {
+      getBytes();// 简单类型也要偏移
+      for (var i = 0; i < length; i++) {
         array.push(decodeProp(type));
       }
-    }else{
+    } else {
       array.push(decodeProp(type, protos));
     }
   }

lib/decoder.js

@@ -118,9 +118,13 @@ function decodeProp(type, protos){
 }
 
 function decodeArray(array, type, protos){
+	var length = codec.decodeUInt32(peekBytes());
+	if(length === 0){
+		getBytes();// 纯偏移
+		return ;
+	}
 	if(util.isSimpleType(type)){
-		var length = codec.decodeUInt32(getBytes());
-
+		getBytes();// 简单类型也要偏移
 		for(var i = 0; i < length; i++){
 			array.push(decodeProp(type));
 		}

lib/encoder.js

@@ -97,7 +97,7 @@ function encodeMsg(buffer, offset, protos, msg){
 					offset = encodeProp(msg[name], proto.type, offset, buffer, protos);
 				break;
 				case 'repeated' :
-					if(!!msg[name] && msg[name].length > 0){
+					if (!!msg[name]) {
 						offset = encodeArray(msg[name], proto, offset, buffer, protos);
 					}
 				break;
@@ -161,6 +161,12 @@ function encodeProp(value, type, offset, buffer, protos){
  * Encode reapeated properties, simple msg and object are decode differented
  */
 function encodeArray(array, proto, offset, buffer, protos){
+	if(array.length === 0){
+		offset = writeBytes(buffer, offset, encodeTag(proto.type, proto.tag));
+		offset = writeBytes(buffer, offset, codec.encodeUInt32(array.length));
+		return offset;
+	}
+
 	var i = 0;
 	if(util.isSimpleType(proto.type)){
 		offset = writeBytes(buffer, offset, encodeTag(proto.type, proto.tag));