Move Wine exe name code from config.cpp to get_wine_exe_name(...)

src/config.cpp

@@ -50,26 +50,9 @@ void parseConfigFile(overlay_params& params) {
 
         // find executable's path when run in Wine
         if (!env_config.empty() && (basename == "wine-preloader" || basename == "wine64-preloader")) {
-            std::string line;
-            std::ifstream stream("/proc/self/cmdline");
-            while (std::getline(stream, line, '\0'))
-            {
-                if (!line.empty()
-                    && ((n = line.find_last_of("/\\")) != std::string::npos)
-                    && n < line.size() - 1) // have at least one character
-                {
-                    auto dot = line.find_last_of('.');
-                    if (dot < n)
-                        dot = line.size();
-                    paths.push_back(env_config + mangohud_dir + "wine-" + line.substr(n + 1, dot - n - 1) + ".conf");
-                    break;
-                }
-                else if (ends_with(line, ".exe", true))
-                {
-                    auto dot = line.find_last_of('.');
-                    paths.push_back(env_config + mangohud_dir + "wine-" + line.substr(0, dot) + ".conf");
-                    break;
-                }
+            std::string name;
+            if (get_wine_exe_name(name)) {
+                paths.push_back(env_config + mangohud_dir + "wine-" + name + ".conf");
             }
         }
     }

src/file_utils.cpp

@@ -106,6 +106,33 @@ std::string get_exe_path()
     return std::string(result, (count > 0) ? count : 0);
 }
 
+bool get_wine_exe_name(std::string& name, bool keep_ext)
+{
+    std::string line;
+    std::ifstream cmdline("/proc/self/cmdline");
+    auto n = std::string::npos;
+    while (std::getline(cmdline, line, '\0'))
+    {
+        if (!line.empty()
+            && ((n = line.find_last_of("/\\")) != std::string::npos)
+            && n < line.size() - 1) // have at least one character
+        {
+            auto dot = keep_ext ? std::string::npos : line.find_last_of('.');
+            if (dot < n)
+                dot = line.size();
+            name = line.substr(n + 1, dot - n - 1);
+            return true;
+        }
+        else if (ends_with(line, ".exe", true))
+        {
+            auto dot = keep_ext ? std::string::npos : line.find_last_of('.');
+            name =  line.substr(0, dot);
+            return true;
+        }
+    }
+    return false;
+}
+
 std::string get_home_dir()
 {
     std::string path;

src/file_utils.h

@@ -16,6 +16,7 @@ std::vector<std::string> ls(const char* root, const char* prefix = nullptr, LS_F
 bool file_exists(const std::string& path);
 bool dir_exists(const std::string& path);
 std::string get_exe_path();
+bool get_wine_exe_name(std::string& name, bool keep_ext = false);
 std::string get_home_dir();
 std::string get_data_dir();
 std::string get_config_dir();