diff --git a/general/inc/utils.h b/general/inc/utils.h
index 58e2ba8..bb127ac 100644
--- a/general/inc/utils.h
+++ b/general/inc/utils.h
@@ -9,6 +9,11 @@
 #include <sys/types.h>
 
 using namespace std;
+// 字节序选择
+typedef enum{
+    BIG_ENDIAN,  // 大端
+    LITTLE_ENDIAN // 小端
+}BYTE_ORDER;
 
 typedef enum {
     ENV_WINDOWS = 1,
@@ -27,13 +32,17 @@ inline ENV_SYS CurrentEnvSys();
 inline ENV_COMPILER CurrentEnvCompiler();
 
 #define RELEASE_MEMORY(x)  \
-    if(nullptr == x) \
-    {  \
-        delete(x); \
-        x = nullptr;\
-    }
+    do {  \
+        if(nullptr == x) \
+        {  \
+            delete(x); \
+            x = nullptr;\
+        } \
+    }while(0) 
+
 string itos(int x);
 
+BYTE_ORDER HostByteOrder();
 
 // 限制float精确度
 float LimitFloat(float in,int size);
diff --git a/general/src/utils.cpp b/general/src/utils.cpp
index f2a2d93..4149236 100644
--- a/general/src/utils.cpp
+++ b/general/src/utils.cpp
@@ -64,7 +64,7 @@ inline ENV_COMPILER CurrentEnvCompiler()
 
 
 // 限制float有效位
-float LimitFloat(float in,int size){
+float LimitFloat(float in,int size) {
 	uint64_t tmp =  1;
 	for(int i = 0;i < size;i++){
 		tmp = tmp*10;
@@ -76,3 +76,14 @@ float LimitFloat(float in,int size){
 
 	return float(integer)/tmp;
 }
+
+
+BYTE_ORDER HostByteOrder(){
+    short x = 0x1234;
+    uint8_t y = *((uint8_t*)(&x));
+    if(y == 0x34){
+        return BYTE_ORDER::LITTLE_ENDIAN;
+    }else{
+        return BYTE_ORDER::BIG_ENDIAN;
+    }
+}
diff --git a/test/src/cpp11/log_test.cpp b/test/src/cpp11/log_test.cpp
index 6e07587..3b54b07 100644
--- a/test/src/cpp11/log_test.cpp
+++ b/test/src/cpp11/log_test.cpp
@@ -31,7 +31,23 @@ float LimitFloat(float in,int size){
 	return float(integer)/tmp;
 }
 
+typedef enum{
+    BIG_ENDIAN = 1,  // 大端
+    LITTLE_ENDIAN // 小端
+}BYTE_ORDER;
+
+BYTE_ORDER HostByteOrder(){
+    short x = 0x1234;
+    uint8_t y = *((uint8_t*)(&x));
+    if(y == 0x34){
+        return BYTE_ORDER::LITTLE_ENDIAN;
+    }else{
+        return BYTE_ORDER::BIG_ENDIAN;
+    }
+}
+
 int main(){
+	std::cout<<"byteorder "<<HostByteOrder()<<std::endl;
 	std::cout<< LimitFloat(1.123,2)<<std::endl;
 	std::cout<<LimitFloat(1.123,3) << std::endl;
 	std::cout<<LimitFloat(0.789,1) << std::endl;