Added PathFromHandle helper function

Primarily to be used to add context to error messages in places where we only have a handle available

2 files changed, 22 insertions, 0 deletions

diff --git a/zencore/filesystem.cpp b/zencore/filesystem.cpp
index 663a626a1..578b28277 100644
--- a/zencore/filesystem.cpp
+++ b/zencore/filesystem.cpp
@@ -589,4 +589,22 @@ FileSystemTraversal::TraverseFileSystem(const std::filesystem::path& RootDir, Tr
 	}
 }
 
+std::filesystem::path
+PathFromHandle(void* NativeHandle)
+{
+	if (NativeHandle == nullptr || NativeHandle == INVALID_HANDLE_VALUE)
+	{
+		return std::filesystem::path();
+	}
+
+	const DWORD RequiredLengthIncludingNul = GetFinalPathNameByHandleW(NativeHandle, nullptr, 0, FILE_NAME_OPENED);
+
+	std::wstring FullPath;
+	FullPath.resize(RequiredLengthIncludingNul - 1);
+
+	const DWORD FinalLength = GetFinalPathNameByHandleW(NativeHandle, FullPath.data(), RequiredLengthIncludingNul, FILE_NAME_OPENED);
+
+	return FullPath;
+}
+
 }  // namespace zen
diff --git a/zencore/include/zencore/filesystem.h b/zencore/include/zencore/filesystem.h
index b20a1e7c6..ba8588c5c 100644
--- a/zencore/include/zencore/filesystem.h
+++ b/zencore/include/zencore/filesystem.h
@@ -29,6 +29,10 @@ ZENCORE_API bool CreateDirectories(const std::filesystem::path& dir);
 ZENCORE_API bool CleanDirectory(const wchar_t* dir);
 ZENCORE_API bool CleanDirectory(const std::filesystem::path& dir);
 
+/** Map native file handle to a path
+ */
+ZENCORE_API std::filesystem::path PathFromHandle(void* NativeHandle);
+
 struct FileContents
 {
 	std::vector<IoBuffer> Data;