Name      string
	Compress  bool
	Extension string
	ItemCount int
}

// String returns the filepath name
func (k Key) String() string {
	keyStr := k.Name
	if k.ItemCount > 1 {
		keyStr = fmt.Sprintf("%d:%s", k.ItemCount, k.Name)
	}
	return keyStr + k.Extension + func() string {
		if k.Compress {
			return compressExt
		}
		return ""
	}()
}

func getItemCount(k string) (count int, err error) {

		if target.updateStmt, err = target.db.Prepare(fmt.Sprintf(mysqlUpdateRow, target.args.Table)); err != nil {
			return err
		}
		// delete statement
		if target.deleteStmt, err = target.db.Prepare(fmt.Sprintf(mysqlDeleteRow, target.args.Table)); err != nil {
			return err
		}
	case event.AccessFormat:
		// insert statement
		if target.insertStmt, err = target.db.Prepare(fmt.Sprintf(mysqlInsertRow, target.args.Table)); err != nil {

func (u Err) Msgf(m string, args ...any) Err {
	e := u.Clone()
	if len(args) == 0 {
		e.msg = m
	} else {
		e.msg = fmt.Sprintf(m, args...)
	}
	return e
}

// Hint - Replace the current error's message
func (u Err) Hint(m string, args ...any) Err {
	e := u.Clone()
	e.hint = fmt.Sprintf(m, args...)
	return e
}

// ErrFn function wrapper
type ErrFn func(err error) Err

func TestLRUWithPurgeEnforcedBySize(t *testing.T) {
	lc := lru.NewLRU[string, string](10, nil, time.Hour)

	for i := 0; i < 100; i++ {
		i := i
		lc.Add(fmt.Sprintf("key%d", i), fmt.Sprintf("val%d", i))
		v, ok := lc.Get(fmt.Sprintf("key%d", i))
		if v != fmt.Sprintf("val%d", i) {
			t.Fatalf("value differs from expected")
		}
		if !ok {
			t.Fatalf("should be true")
		}
		if lc.Len() > 20 {

			if n != 10000 {
				panic(fmt.Sprintf("wlock(%d)\n", n))
			}
			for range 100 {
			}
			atomic.AddInt32(activity, -10000)
			rwm.Unlock(context.Background())
		}
	}
	cdone <- true
}

// Borrowed from rwmutex_test.go
func hammerRWMutex(t *testing.T, gomaxprocs, numReaders, numIterations int) {
	t.Run(fmt.Sprintf("%d-%d-%d", gomaxprocs, numReaders, numIterations), func(t *testing.T) {

	if o.ID == "" {
		// Mark as returning listing...
		return fmt.Sprintf("%s[minio_cache:%s,return:]", marker, markerTagVersion)
	}
	if strings.ContainsAny(o.ID, "[:,") {
		internalLogIf(context.Background(), fmt.Errorf("encodeMarker: uuid %s contained invalid characters", o.ID))
	}
	return fmt.Sprintf("%s[minio_cache:%s,id:%s,p:%d,s:%d]", marker, markerTagVersion, o.ID, o.pool, o.set)

	for i := 0; true; i++ {
		n1, e1 := io.ReadFull(r1, b1)
		n2, e2 := io.ReadFull(r2, b2)
		if n1 != n2 {
			return false, fmt.Sprintf("Read %d != %d bytes from the readers", n1, n2)
		}
		if !bytes.Equal(b1[:n1], b2[:n2]) {
			return false, fmt.Sprintf("After reading %d equal buffers (32Kib each), we got the following two strings:\n%v\n%v\n",
				i, b1, b2)
		}
		// Check if stream has ended

			t.Fatal("Expected to fail, but found success")
		}

		mp := []mountInfo{
			{"/dev/2", "/path/to/1/2", "type2", []string{"flags"}, "2", "2"},
		}
		msg := fmt.Sprintf("Cross-device mounts detected on path (/path/to/1) at following locations %s. Export path should not have any sub-mounts, refusing to start.", mp)
		if err.Error() != msg {
			t.Fatalf("Expected msg %s, got %s", msg, err)
		}
	}

		if srcEOF {
			fmt.Printf("only in target: %s\n", tgtCtnt.Key)
			tgtCtnt, tgtOk = <-tgtCh
			continue
		}

		// The same for target
		if tgtEOF {
			fmt.Printf("only in source: %s\n", srcCtnt.Key)
			srcCtnt, srcOk = nextObject(srcCh)
			continue
		}

		if srcCtnt.Key < tgtCtnt.Key {
			fmt.Printf("only in source: %s\n", srcCtnt.Key)

		}
		// Skip data...
		val, buf, e = msgp.ReadBytesZC(buf)
		if e != nil {
			return nil, e
		}
		if i > 0 {
			res = append(res, ',')
		}
		s := fmt.Sprintf(`"%s":%d`, string(key), len(val))
		res = append(res, []byte(s)...)
	}
	res = append(res, '}')
	return res, nil
}

const (
	xlHeaderVersion = 2
	xlMetaVersion   = 3
)