From 27100b172779bd645ff592ca51cdde46c556e4a7 Mon Sep 17 00:00:00 2001
From: zhengchao <zhengchao@iie.ac.cn>
Date: Tue, 8 Mar 2016 14:47:21 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=A0=E5=BC=BA=E5=AD=97=E7=AC=A6=E4=B8=B2?=
 =?UTF-8?q?=E6=89=AB=E6=8F=8F=E8=BE=93=E5=85=A5=E9=95=BF=E5=BA=A6=E6=A3=80?=
 =?UTF-8?q?=E6=9F=A5=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/entry/Maat_api.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/entry/Maat_api.cpp b/src/entry/Maat_api.cpp
index 27289d1..5da7a5e 100644
--- a/src/entry/Maat_api.cpp
+++ b/src/entry/Maat_api.cpp
@@ -716,6 +716,10 @@ int Maat_full_scan_string_detail(Maat_feather_t feather,int table_id
 	_compile_result_t compile_result[rule_num];//dynamic array
 	struct _Maat_table_info_t *p_table=NULL;
 	struct timespec start,end;
+	if(data==NULL||data_len<=0)
+	{
+		return 0;
+	}
 	if(_feather->perf_on==1)
 	{
 		clock_gettime(CLOCK_MONOTONIC,&start);
@@ -1071,15 +1075,16 @@ int Maat_stream_scan_string_detail(stream_para_t* stream_para
 	scan_data_t region_scan_data;
 	_Maat_table_info_t* p_table=NULL;
 	struct timespec start,end;	
+	if(data==NULL||data_len<=0)
+	{
+		return 0;
+	}
 	if(sp->feather->perf_on==1)
 	{
 		clock_gettime(CLOCK_MONOTONIC,&start);
 	}
 	_mid=grab_mid(mid, sp->feather, sp->thread_num,0);
-	if(data==NULL||data_len==0)
-	{
-		return 0;
-	}
+
 	if(scanner==NULL)
 	{
 		return 0;