gdbserver: use numeric character references for unicode

src/common/string_util.cpp

@@ -135,6 +135,11 @@ std::u16string UTF8ToUTF16(std::string_view input) {
     return convert.from_bytes(input.data(), input.data() + input.size());
 }
 
+std::u32string UTF8ToUTF32(std::string_view input) {
+    std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> convert;
+    return convert.from_bytes(input.data(), input.data() + input.size());
+}
+
 #ifdef _WIN32
 static std::wstring CPToUTF16(u32 code_page, std::string_view input) {
     const auto size =

src/common/string_util.h

@@ -38,6 +38,7 @@ bool SplitPath(const std::string& full_path, std::string* _pPath, std::string* _
 
 [[nodiscard]] std::string UTF16ToUTF8(std::u16string_view input);
 [[nodiscard]] std::u16string UTF8ToUTF16(std::string_view input);
+[[nodiscard]] std::u32string UTF8ToUTF32(std::string_view input);
 
 #ifdef _WIN32
 [[nodiscard]] std::string UTF16ToUTF8(std::wstring_view input);