fix utf8 support

src/logic/scripting/lua/libs/libutf8.cpp

@@ -89,8 +89,8 @@ static int l_escape(lua::State* L) {
 }
 
 static int l_escape_xml(lua::State* L) {
-    auto string = lua::require_lstring(L, 1);
-    return lua::pushstring(L, util::escape_xml(string));
+    auto string = lua::require_wstring(L, 1);
+    return lua::pushwstring(L, util::escape_xml(string));
 }
 
 const luaL_Reg utf8lib[] = {

src/util/stringutil.cpp

@@ -60,24 +60,24 @@ std::string util::escape(std::string_view s, bool escapeUnicode) {
     return ss.str();
 }
 
-std::string util::escape_xml(std::string_view s) {
-    std::stringstream ss;
-    for (char c : s) {
+std::wstring util::escape_xml(std::wstring_view s) {
+    std::wstringstream ss;
+    for (wchar_t c : s) {
         switch (c) {
-            case '&':
-                ss << "&amp;";
+            case L'&':
+                ss << L"&amp;";
                 break;
-            case '<':
-                ss << "&lt;";
+            case L'<':
+                ss << L"&lt;";
                 break;
-            case '>':
-                ss << "&gt;";
+            case L'>':
+                ss << L"&gt;";
                 break;
             case '"':
-                ss << "&quot;";
+                ss << L"&quot;";
                 break;
             case '\'':
-                ss << "&apos;";
+                ss << L"&apos;";
                 break;
             default:
                 ss << c;

src/util/stringutil.hpp

@@ -11,7 +11,7 @@ namespace util {
     std::string escape(std::string_view s, bool escapeUnicode=true);
 
     /// @brief Escape all special XML characters 
-    std::string escape_xml(std::string_view s);
+    std::wstring escape_xml(std::wstring_view s);
 
     /// @brief Function used for error messages
     std::string quote(const std::string& s);