[yuzu_cmd] gdbstub option (#43)

Co-authored-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/43
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/yuzu_cmd/yuzu.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2014 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -80,6 +83,7 @@ static void PrintHelp(const char* argv0) {
                  " Nickname, password, address and port for multiplayer\n"
                  "-p, --program         Pass following string as arguments to executable\n"
                  "-u, --user            Select a specific user profile from 0 to 7\n"
+                 "-d, --debug           Run the GDB stub on a port from 1 to 65535\n"
                  "-v, --version         Output version information and exit\n";
 }
 
@@ -162,24 +166,22 @@ static void OnMessageReceived(const Network::ChatEntry& msg) {
 }
 
 static void OnStatusMessageReceived(const Network::StatusMessageEntry& msg) {
-    std::string message;
+    std::string message = [&]() {
         switch (msg.type) {
         case Network::IdMemberJoin:
-        message = fmt::format("{} has joined", msg.nickname);
-        break;
+            return fmt::format("{} has joined", msg.nickname);
         case Network::IdMemberLeave:
-        message = fmt::format("{} has left", msg.nickname);
-        break;
+            return fmt::format("{} has left", msg.nickname);
         case Network::IdMemberKicked:
-        message = fmt::format("{} has been kicked", msg.nickname);
-        break;
+            return fmt::format("{} has been kicked", msg.nickname);
         case Network::IdMemberBanned:
-        message = fmt::format("{} has been banned", msg.nickname);
-        break;
+            return fmt::format("{} has been banned", msg.nickname);
         case Network::IdAddressUnbanned:
-        message = fmt::format("{} has been unbanned", msg.nickname);
-        break;
+            return fmt::format("{} has been unbanned", msg.nickname);
+        default:
+            return std::string{};
         }
+    }();
     if (!message.empty())
         std::cout << std::endl << "* " << message << std::endl << std::endl;
 }
@@ -209,10 +211,10 @@ int main(int argc, char** argv) {
     }
 #endif
     std::string filepath;
-    std::optional<std::string> config_path;
+    std::optional<std::string> config_path{};
     std::string program_args;
-    std::optional<int> selected_user;
-
+    std::optional<int> selected_user{};
+    std::optional<u16> override_gdb_port{};
     bool use_multiplayer = false;
     bool fullscreen = false;
     std::string nickname{};
@@ -222,6 +224,7 @@ int main(int argc, char** argv) {
 
     static struct option long_options[] = {
         // clang-format off
+        {"debug", no_argument, 0, 'd'},
         {"config", required_argument, 0, 'c'},
         {"fullscreen", no_argument, 0, 'f'},
         {"help", no_argument, 0, 'h'},
@@ -235,9 +238,12 @@ int main(int argc, char** argv) {
     };
 
     while (optind < argc) {
-        int arg = getopt_long(argc, argv, "g:fhvp::c:u:", long_options, &option_index);
+        int arg = getopt_long(argc, argv, "g:fhvp::c:u:d:", long_options, &option_index);
         if (arg != -1) {
             switch (static_cast<char>(arg)) {
+            case 'd':
+                override_gdb_port = static_cast<uint16_t>(atoi(optarg));
+                break;
             case 'c':
                 config_path = optarg;
                 break;
@@ -323,6 +329,11 @@ int main(int argc, char** argv) {
         Settings::values.current_user = std::clamp(*selected_user, 0, 7);
     }
 
+    if (override_gdb_port.has_value()) {
+        Settings::values.use_gdbstub = true;
+        Settings::values.gdbstub_port = *override_gdb_port;
+    }
+
 #ifdef _WIN32
     LocalFree(argv_w);
 #endif