fix empty xml config bug

Signed-off-by: wlj <wangliangjiang1@huawei.com>
Change-Id: Ie0dbebf764ddbe5c46caf2762dc0120d54de4cc4

utils/include/window_helper.h

@@ -277,6 +277,9 @@ public:
 
     static inline bool IsNumber(std::string str)
     {
+        if (str.size() == 0) {
+            return false;
+        }
         for (int32_t i = 0; i < static_cast<int32_t>(str.size()); i++) {
             if (str.at(i) < '0' || str.at(i) > '9') {
                 return false;
@@ -287,6 +290,9 @@ public:
 
     static inline bool IsFloatingNumber(std::string str)
     {
+        if (str.size() == 0) {
+            return false;
+        }
         for (int32_t i = 0; i < static_cast<int32_t>(str.size()); i++) {
             if ((str.at(i) < '0' || str.at(i) > '9') &&
                 (str.at(i) != '.' || std::count(str.begin(), str.end(), '.') > 1)) {

wmserver/src/window_manager_config.cpp

@@ -123,6 +123,10 @@ void WindowManagerConfig::ReadIntNumbersConfigInfo(const xmlNodePtr& currNode)
 
     std::vector<int> numbersVec;
     std::string numbersStr = reinterpret_cast<const char*>(context);
+    if (numbersStr.size() == 0) {
+        xmlFree(context);
+        return;
+    }
     auto numbers = WindowHelper::Split(numbersStr, " ");
     for (auto& num : numbers) {
         if (!WindowHelper::IsNumber(num)) {
@@ -149,6 +153,10 @@ void WindowManagerConfig::ReadFloatNumbersConfigInfo(const xmlNodePtr& currNode)
 
     std::vector<float> numbersVec;
     std::string numbersStr = reinterpret_cast<const char*>(context);
+    if (numbersStr.size() == 0) {
+        xmlFree(context);
+        return;
+    }
     auto numbers = WindowHelper::Split(numbersStr, " ");
     for (auto& num : numbers) {
         if (!WindowHelper::IsFloatingNumber(num)) {