[util] Added getExeName() function

This will allow DXVK to apply game-specific
features or workarounds in the future.

src/util/util_env.cpp

@@ -19,4 +19,20 @@ namespace dxvk::env {
     return str::fromws(result);
   }
   
+  
+  std::string getExeName() {
+    std::wstring exePath;
+    exePath.resize(MAX_PATH + 1);
+    
+    DWORD len = ::GetModuleFileNameW(NULL, &exePath.at(0), MAX_PATH);
+    exePath.resize(len);
+    
+    std::string fullPath = str::fromws(exePath);
+    auto n = fullPath.find_last_of('\\');
+    
+    return (n != std::string::npos)
+      ? fullPath.substr(n + 1)
+      : fullPath;
+  }
+  
 }

src/util/util_env.h

@@ -15,4 +15,14 @@ namespace dxvk::env {
    */
   std::string getEnvVar(const wchar_t* name);
   
+  /**
+   * \brief Gets the executable name
+   * 
+   * Returns the base name (not the full path) of the
+   * program executable, including the file extension.
+   * This function should be used to identify programs.
+   * \returns Executable name
+   */
+  std::string getExeName();
+  
 }