// and the Err field describing the problem.
//
// Open should reject attempts to open names that do not satisfy
// ValidPath(name), returning a *PathError with Err set to
// ErrInvalid or ErrNotExist.
func (ffs *fakeFsWithFakeFds) Open(name string) (fs.File, error) {
	f, err := ffs.ReadDirFS.Open(name)
	if err != nil {
		return nil, err
	}
	return wrapFile(f), nil
}

	"unsafe"
)

// Stat returns the [FileInfo] structure describing file.
// If there is an error, it will be of type [*PathError].
func (file *File) Stat() (FileInfo, error) {
	if file == nil {
		return nil, ErrInvalid
	}
	return statHandle(file.name, file.pfd.Sysfd)
}

// stat implements both Stat and Lstat of a file.
func stat(funcname, name string, followSurrogates bool) (FileInfo, error) {
	if len(name) == 0 {

				gzip.ErrHeader, gzip.ErrChecksum,
				s2.ErrCorrupt, s2.ErrUnsupported, s2.ErrCRC,
				zstd.ErrBlockTooSmall, zstd.ErrMagicMismatch, zstd.ErrWindowSizeExceeded, zstd.ErrUnknownDictionary, zstd.ErrWindowSizeTooSmall,
				lz4.ErrInvalid, lz4.ErrBlockDependency,
			}
			for _, e := range errs {
				if errors.Is(err, e) {
					return errInvalidCompression(err, s3Select.Input.CompressionType)
				}
			}
			return err
		}
		return nil

}

// Test that all File methods give ErrInvalid if the receiver is nil.
func TestNilFileMethods(t *testing.T) {
	t.Parallel()

	for _, tt := range nilFileMethodTests {
		var file *File
		got := tt.f(file)
		if got != ErrInvalid {
			t.Errorf("%v should fail when f is nil; got %v", tt.name, got)
		}
	}
}

func (dir dirFS) join(name string) (string, error) {
	if dir == "" {
		return "", errors.New("os: DirFS with empty root")
	}
	name, err := filepathlite.Localize(name)
	if err != nil {
		return "", ErrInvalid
	}
	if IsPathSeparator(dir[len(dir)-1]) {
		return string(dir) + name, nil
	}
	return string(dir) + string(PathSeparator) + name, nil
}

// ReadFile reads the named file and returns the contents.

func (f *fakeFile) Close() error               { return nil }
func (f *fakeFile) Stat() (fs.FileInfo, error) { return f.fi, nil }
func (f *fakeFile) Readdir(count int) ([]fs.FileInfo, error) {
	if !f.fi.dir {
		return nil, fs.ErrInvalid
	}
	var fis []fs.FileInfo

	limit := f.entpos + count
	if count <= 0 || limit > len(f.fi.ents) {
		limit = len(f.fi.ents)
	}
	for ; f.entpos < limit; f.entpos++ {

		{"(FileMode).Perm", Method, 16},
		{"(FileMode).String", Method, 16},
		{"(FileMode).Type", Method, 16},
		{"DirEntry", Type, 16},
		{"ErrClosed", Var, 16},
		{"ErrExist", Var, 16},
		{"ErrInvalid", Var, 16},
		{"ErrNotExist", Var, 16},
		{"ErrPermission", Var, 16},
		{"FS", Type, 16},
		{"File", Type, 16},
		{"FileInfo", Type, 16},
		{"FileInfoToDirEntry", Func, 17},
		{"FileMode", Type, 16},

pkg io/fs, type SubFS interface, Sub(string) (FS, error)
pkg io/fs, type WalkDirFunc func(string, DirEntry, error) error
pkg io/fs, var ErrClosed error
pkg io/fs, var ErrExist error
pkg io/fs, var ErrInvalid error
pkg io/fs, var ErrNotExist error
pkg io/fs, var ErrPermission error
pkg io/fs, var SkipDir error
pkg log, func Default() *Logger
pkg net, var ErrClosed error
pkg net/http, func FS(fs.FS) FileSystem