} else {
			errs[i] = nil
		}
	}
	return errs
}

// Returns hash sum for whole-bitrot, nil for streaming-bitrot.
func bitrotWriterSum(w io.Writer) []byte {
	if bw, ok := w.(*wholeBitrotWriter); ok {
		return bw.Sum(nil)
	}
	return nil
}

// Returns the size of the file with bitrot protection
func bitrotShardFileSize(size int64, shardSize int64, algo BitrotAlgorithm) int64 {

}

func (b *streamingBitrotWriter) Write(p []byte) (int, error) {
	if len(p) == 0 {
		return 0, nil
	}
	if b.finished {
		return 0, errors.New("bitrot write not allowed")
	}
	if int64(len(p)) > b.shardSize {
		return 0, errors.New("unexpected bitrot buffer size")
	}
	if int64(len(p)) < b.shardSize {
		b.finished = true
	}
	b.h.Reset()
	b.h.Write(p)
	hashBytes := b.h.Sum(nil)

package cmd

import (
	"context"
	"hash"
	"io"
)

// Implementation to calculate bitrot for the whole file.
type wholeBitrotWriter struct {
	disk      StorageAPI
	volume    string
	filePath  string
	shardSize int64 // This is the shard size of the erasure logic
	hash.Hash       // For bitrot hash
}

func (b *wholeBitrotWriter) Write(p []byte) (int, error) {

	if err = config.CheckValidKeys(config.HealSubSys, kvs, DefaultKVS); err != nil {
		return cfg, err
	}

	bitrot := env.Get(EnvBitrot, kvs.GetWithDefault(Bitrot, DefaultKVS))
	if _, err = parseBitrotConfig(bitrot); err != nil {
		return cfg, fmt.Errorf("'heal:bitrotscan' value invalid: %w", err)
	}

	cfg.Bitrot = bitrot

	cfg.Sleep, err = time.ParseDuration(env.Get(EnvSleep, kvs.GetWithDefault(Sleep, DefaultKVS)))
	if err != nil {

	ModTime time.Time `json:"modTime"` // ModTime of the object `xl.meta`.
	Name    string    `json:"name"`
	Dir     bool      `json:"dir"`
	Mode    uint32    `json:"mode"`
}

// ErasureInfo holds erasure coding and bitrot related information.
type ErasureInfo struct {
	// Algorithm is the string representation of erasure-coding-algorithm
	Algorithm string `json:"algorithm"`
	// DataBlocks is the number of data blocks for erasure-coding

		return config.DefaultHelpPostfix(DefaultKVS, key)
	}

	// Help provides help for config values
	Help = config.HelpKVS{
		config.HelpKV{
			Key:         Bitrot,
			Description: `perform bitrot scan on drives when checking objects during scanner` + defaultHelpPostfix(Bitrot),
			Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         Sleep,

			for i := range staleWriters {
				if staleWriters[i] == nil {
					continue
				}
				if !bytes.Equal(bitrotWriterSum(staleWriters[i]), bitrotWriterSum(writers[i])) {
					t.Errorf("Test %d: heal returned different bitrot checksums", i)
				}
			}
		}
	}

  @BeforeExperiment
  protected void setUp() {
    BitSet bitSet = new BitSet();
    for (int i = 0; i < OLD_WHITESPACE_TABLE.length(); i++) {
      bitSet.set(OLD_WHITESPACE_TABLE.charAt(i));
    }
    bitSet.clear(0);
    bitSet.clear(1);
    matcher = useNew ? CharMatcher.whitespace() : OLD_WHITESPACE;
    teststring = newTestString(new Random(1), bitSet, percentMatching);
  }

  @Benchmark

package pubsub

import (
	"math"
	"math/bits"
)

// Mask allows filtering by a bitset mask.
type Mask uint64

const (
	// MaskAll is the mask for all entries.
	MaskAll Mask = math.MaxUint64
)

// MaskFromMaskable extracts mask from an interface.
func MaskFromMaskable(m Maskable) Mask {
	return Mask(m.Mask())
}

// Contains returns whether *all* flags in other is present in t.
func (t Mask) Contains(other Mask) bool {