[Misc] Cleanup in Kernel

src/xenia/kernel/util/xfiletime.h

@@ -0,0 +1,64 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2025 Xenia Canary. All rights reserved.                          *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_KERNEL_UTIL_XFILETIME_H_
+#define XENIA_KERNEL_UTIL_XFILETIME_H_
+
+#include "xenia/base/byte_order.h"
+#include "xenia/base/chrono.h"
+
+namespace xe {
+namespace kernel {
+
+struct X_FILETIME {
+  static constexpr uint64_t minimal_valid_time = 125911584000000000;
+  static constexpr uint64_t maximal_valid_time = 157469184000000000;
+
+  xe::be<uint32_t> high_part;
+  xe::be<uint32_t> low_part;
+
+  X_FILETIME() {
+    high_part = 0;
+    low_part = 0;
+  }
+
+  X_FILETIME(uint64_t filetime) {
+    high_part = static_cast<uint32_t>(filetime >> 32);
+    low_part = static_cast<uint32_t>(filetime);
+  }
+
+  X_FILETIME(std::time_t time) {
+    const auto file_time =
+        chrono::WinSystemClock::to_file_time(chrono::WinSystemClock::from_sys(
+            std::chrono::system_clock::from_time_t(time)));
+
+    high_part = static_cast<uint32_t>(file_time >> 32);
+    low_part = static_cast<uint32_t>(file_time);
+  }
+
+  chrono::WinSystemClock::time_point to_time_point() const {
+    const uint64_t filetime =
+        (static_cast<uint64_t>(high_part) << 32) | low_part;
+
+    return chrono::WinSystemClock::from_file_time(filetime);
+  }
+
+  bool is_valid() const {
+    const uint64_t filetime =
+        (static_cast<uint64_t>(high_part) << 32) | low_part;
+
+    return filetime >= minimal_valid_time && filetime <= maximal_valid_time;
+  }
+};
+static_assert_size(X_FILETIME, 0x8);
+
+}  // namespace kernel
+}  // namespace xe
+
+#endif