style(sonar): fix cpp:S6185 (#4133)

src/confighttp.cpp

@@ -8,6 +8,7 @@
 
 // standard includes
 #include <filesystem>
+#include <format>
 #include <fstream>
 #include <set>
 
@@ -713,7 +714,7 @@ namespace confighttp {
         if (const int max_index = static_cast<int>(apps_node.size()) - 1; max_index < 0) {
           error = "No applications to delete";
         } else {
-          error = "'index' out of range, max index is "s + std::to_string(max_index);
+          error = std::format("'index' {} out of range, max index is {}", index, max_index);
         }
         bad_request(response, request, error);
         return;
@@ -730,7 +731,7 @@ namespace confighttp {
       proc::refresh(config::stream.file_apps);
 
       output_tree["status"] = true;
-      output_tree["result"] = "application " + std::to_string(index) + " deleted";
+      output_tree["result"] = std::format("application {} deleted", index);
       send_response(response, output_tree);
     } catch (std::exception &e) {
       BOOST_LOG(warning) << "DeleteApp: "sv << e.what();

src/entry_handler.cpp

@@ -4,6 +4,7 @@
  */
 // standard includes
 #include <csignal>
+#include <format>
 #include <iostream>
 #include <thread>
 
@@ -25,13 +26,11 @@ extern "C" {
 
 using namespace std::literals;
 
-void launch_ui() {
-  std::string url = "https://localhost:" + std::to_string(net::map_port(confighttp::PORT_HTTPS));
-  platf::open_url(url);
-}
-
-void launch_ui_with_path(std::string path) {
-  std::string url = "https://localhost:" + std::to_string(net::map_port(confighttp::PORT_HTTPS)) + path;
+void launch_ui(const std::optional<std::string> &path) {
+  std::string url = std::format("https://localhost:{}", static_cast<int>(net::map_port(confighttp::PORT_HTTPS)));
+  if (path) {
+    url += *path;
+  }
   platf::open_url(url);
 }
 

src/entry_handler.h

@@ -14,19 +14,13 @@
 
 /**
  * @brief Launch the Web UI.
+ * @param path Optional path to append to the base URL.
  * @examples
  * launch_ui();
+ * launch_ui("/pin");
  * @examples_end
  */
-void launch_ui();
-
-/**
- * @brief Launch the Web UI at a specific endpoint.
- * @examples
- * launch_ui_with_path("/pin");
- * @examples_end
- */
-void launch_ui_with_path(std::string path);
+void launch_ui(const std::optional<std::string> &path = std::nullopt);
 
 /**
  * @brief Functions for handling command line arguments.

src/nvenc/nvenc_base.cpp

@@ -5,6 +5,9 @@
 // this include
 #include "nvenc_base.h"
 
+// standard includes
+#include <format>
+
 // local includes
 #include "src/config.h"
 #include "src/logging.h"
@@ -427,7 +430,7 @@ namespace nvenc {
         extra += " two-pass";
       }
       if (config.vbv_percentage_increase > 0 && get_encoder_cap(NV_ENC_CAPS_SUPPORT_CUSTOM_VBV_BUF_SIZE)) {
-        extra += " vbv+" + std::to_string(config.vbv_percentage_increase);
+        extra += std::format(" vbv+{}", config.vbv_percentage_increase);
       }
       if (encoder_params.rfi) {
         extra += " rfi";
@@ -439,7 +442,7 @@ namespace nvenc {
         extra += " spatial-aq";
       }
       if (enc_config.rcParams.enableMinQP) {
-        extra += " qpmin=" + std::to_string(enc_config.rcParams.minQP.qpInterP);
+        extra += std::format(" qpmin={}", enc_config.rcParams.minQP.qpInterP);
       }
       if (config.insert_filler_data) {
         extra += " filler-data";

src/nvhttp.cpp

@@ -7,6 +7,7 @@
 
 // standard includes
 #include <filesystem>
+#include <format>
 #include <string>
 #include <utility>
 
@@ -636,7 +637,7 @@ namespace nvhttp {
       tree.put("root.<xmlattr>.status_code", 400);
       tree.put(
         "root.<xmlattr>.status_message",
-        "Pin must be 4 digits, " + std::to_string(pin.size()) + " provided"
+        std::format("Pin must be 4 digits, {} provided", pin.size())
       );
       return false;
     }
@@ -896,7 +897,15 @@ namespace nvhttp {
     }
 
     tree.put("root.<xmlattr>.status_code", 200);
-    tree.put("root.sessionUrl0", launch_session->rtsp_url_scheme + net::addr_to_url_escaped_string(request->local_endpoint().address()) + ':' + std::to_string(net::map_port(rtsp_stream::RTSP_SETUP_PORT)));
+    tree.put(
+      "root.sessionUrl0",
+      std::format(
+        "{}{}:{}",
+        launch_session->rtsp_url_scheme,
+        net::addr_to_url_escaped_string(request->local_endpoint().address()),
+        static_cast<int>(net::map_port(rtsp_stream::RTSP_SETUP_PORT))
+      )
+    );
     tree.put("root.gamesession", 1);
 
     rtsp_stream::launch_session_raise(launch_session);
@@ -978,7 +987,15 @@ namespace nvhttp {
     }
 
     tree.put("root.<xmlattr>.status_code", 200);
-    tree.put("root.sessionUrl0", launch_session->rtsp_url_scheme + net::addr_to_url_escaped_string(request->local_endpoint().address()) + ':' + std::to_string(net::map_port(rtsp_stream::RTSP_SETUP_PORT)));
+    tree.put(
+      "root.sessionUrl0",
+      std::format(
+        "{}{}:{}",
+        launch_session->rtsp_url_scheme,
+        net::addr_to_url_escaped_string(request->local_endpoint().address()),
+        static_cast<int>(net::map_port(rtsp_stream::RTSP_SETUP_PORT))
+      )
+    );
     tree.put("root.resume", 1);
 
     rtsp_stream::launch_session_raise(launch_session);

src/platform/linux/vaapi.cpp

@@ -4,6 +4,7 @@
  */
 // standard includes
 #include <fcntl.h>
+#include <format>
 #include <sstream>
 #include <string>
 
@@ -574,7 +575,7 @@ namespace va {
     if (!display) {
       char string[1024];
 
-      auto bytes = readlink(("/proc/self/fd/" + std::to_string(fd)).c_str(), string, sizeof(string));
+      auto bytes = readlink(std::format("/proc/self/fd/{}", fd).c_str(), string, sizeof(string));
 
       std::string_view render_device {string, (std::size_t) bytes};
 

src/platform/windows/audio.cpp

@@ -4,6 +4,9 @@
  */
 #define INITGUID
 
+// standard includes
+#include <format>
+
 // platform includes
 #include <Audioclient.h>
 #include <avrt.h>
@@ -168,8 +171,7 @@ namespace {
                          waveformat.SubFormat == KSDATAFORMAT_SUBTYPE_PCM        ? "S" :
                                                                                    "UNKNOWN";
 
-    result += std::to_string(waveformat.Samples.wValidBitsPerSample) + " " +
-              std::to_string(waveformat.Format.nSamplesPerSec) + " ";
+    result += std::format("{} {} ", static_cast<int>(waveformat.Samples.wValidBitsPerSample), static_cast<int>(waveformat.Format.nSamplesPerSec));
 
     switch (waveformat.dwChannelMask) {
       case waveformat_mask_stereo:
@@ -189,7 +191,7 @@ namespace {
         break;
 
       default:
-        result += std::to_string(waveformat.Format.nChannels) + " channels (unrecognized)";
+        result += std::format("{} channels (unrecognized)", static_cast<int>(waveformat.Format.nChannels));
         break;
     }
 

src/rtsp.cpp

@@ -12,6 +12,7 @@ extern "C" {
 // standard includes
 #include <array>
 #include <cctype>
+#include <format>
 #include <set>
 #include <unordered_map>
 #include <utility>
@@ -864,7 +865,7 @@ namespace rtsp_stream {
     session_option.next = &port_option;
 
     // Moonlight merely requires 'server_port=<port>'
-    auto port_value = "server_port=" + std::to_string(port);
+    auto port_value = std::format("server_port={}", static_cast<int>(port));
 
     port_option.option = const_cast<char *>("Transport");
     port_option.content = port_value.data();

src/system_tray.cpp

@@ -305,7 +305,7 @@ namespace system_tray {
     tray.notification_icon = TRAY_ICON_LOCKED;
     tray.tooltip = PROJECT_NAME;
     tray.notification_cb = []() {
-      launch_ui_with_path("/pin");
+      launch_ui("/pin");
     };
     tray_update(&tray);
   }