Common: Create HRWrap

HRWrap now allows HRESULT to be formatted, giving useful information beyond "it failed" or a hex code that isn't obvious to most users.  This commit does not add any uses of it, though.

Source/Core/Common/HRWrap.h

@@ -0,0 +1,33 @@
+// Copyright 2021 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <fmt/format.h>
+#include <string>
+#include <winerror.h>
+
+namespace Common
+{
+std::string GetHResultMessage(HRESULT hr);
+
+// Wrapper for HRESULT to be used with fmt.  Note that we can't create a fmt::formatter directly
+// for HRESULT as HRESULT is simply a typedef on long and not a distinct type.
+struct HRWrap
+{
+  constexpr explicit HRWrap(HRESULT hr) : m_hr(hr) {}
+  const HRESULT m_hr;
+};
+}  // namespace Common
+
+template <>
+struct fmt::formatter<Common::HRWrap>
+{
+  constexpr auto parse(fmt::format_parse_context& ctx) { return ctx.begin(); }
+  template <typename FormatContext>
+  auto format(const Common::HRWrap& hr, FormatContext& ctx)
+  {
+    return fmt::format_to(ctx.out(), "{} ({:#010x})", Common::GetHResultMessage(hr.m_hr),
+                          static_cast<u32>(hr.m_hr));
+  }
+};