correct split function

Base/Util/StringUtil.cpp

@@ -24,13 +24,17 @@
 //! Returns token vector obtained by splitting string at delimiters.
 std::vector<std::string> Base::String::split(const std::string& text, const std::string& delimiter)
 {
+    if (text.empty())
+        return {};
     std::vector<std::string> result;
     size_t pos = 0;
     while (pos != std::string::npos) {
         size_t next_pos = text.find(delimiter, pos);
-        result.push_back(text.substr(pos, next_pos - pos));
-        if (next_pos == std::string::npos)
+        if (next_pos == std::string::npos) {
+            result.push_back(text.substr(pos));
             break;
+        }
+        result.push_back(text.substr(pos, next_pos - pos));
         pos = next_pos + delimiter.length();
     }
     return result;

Fit/Tool/StringUtil.cpp

@@ -21,13 +21,17 @@
 std::vector<std::string> mumufit::stringUtil::split(const std::string& text,
                                                     const std::string& delimiter)
 {
+    if (text.empty())
+        return {};
     std::vector<std::string> result;
     size_t pos = 0;
     while (pos != std::string::npos) {
         size_t next_pos = text.find(delimiter, pos);
-        result.push_back(text.substr(pos, next_pos - pos));
-        if (next_pos == std::string::npos)
+        if (next_pos == std::string::npos) {
+            result.push_back(text.substr(pos));
             break;
+        }
+        result.push_back(text.substr(pos, next_pos - pos));
         pos = next_pos + delimiter.length();
     }
     return result;