*/
@Beta
@ElementTypesAreNonnullByDefault
public final class HashingInputStream extends FilterInputStream {
  private final Hasher hasher;

  /**
   * Creates an input stream that hashes using the given {@link HashFunction} and delegates all data
   * read from it to the underlying {@link InputStream}.
   *
   * <p>The {@link InputStream} should not be read from before or after the hand-off.
   */

 */
@Beta
@ElementTypesAreNonnullByDefault
public final class HashingInputStream extends FilterInputStream {
  private final Hasher hasher;

  /**
   * Creates an input stream that hashes using the given {@link HashFunction} and delegates all data
   * read from it to the underlying {@link InputStream}.
   *
   * <p>The {@link InputStream} should not be read from before or after the hand-off.
   */

	h2 := new(Hash)
	h2.SetSeed(h1.Seed())
	h2.WriteString("foo")
	y := h2.Sum64()
	if x != y {
		t.Errorf("hashes don't match: want %x, got %x", x, y)
	}
}

// Make sure a Hash implements the hash.Hash and hash.Hash64 interfaces.
var _ hash.Hash = &Hash{}
var _ hash.Hash64 = &Hash{}

func benchmarkSize(b *testing.B, size int) {
	h := &Hash{}
	buf := make([]byte, size)
	s := string(buf)

@Beta
@ElementTypesAreNonnullByDefault
public final class HashingOutputStream extends FilterOutputStream {
  private final Hasher hasher;

  /**
   * Creates an output stream that hashes using the given {@link HashFunction}, and forwards all
   * data written to it to the underlying {@link OutputStream}.
   *
   * <p>The {@link OutputStream} should not be written to before or after the hand-off.
   */

            }
            Hasher hasher = Hashing.newHasher();
            hasher.putHash(DIR_SIGNATURE);
            for (FileSystemLocationSnapshot child : children) {
                hasher.putString(child.getName());
                hasher.putHash(child.getHash());
            }
            return new DirectorySnapshot(absolutePath, name, accessType, hasher.hash(), children);
        }
    }

        this.rootHashes = rootHashes;
    }

    @Override
    public HashCode getHash() {
        if (hash == null) {
            Hasher hasher = Hashing.newHasher();
            hashingStrategy.appendToHasher(hasher, fingerprints.values());
            hash = hasher.hash();
        }
        return hash;
    }

    @Override
    public boolean isEmpty() {

            .orElseGet(IoSupplier.wrap(() -> delegate.hash(snapshotContext)));
    }

    @Nullable
    @Override
    public HashCode hash(ZipEntryContext zipEntryContext) throws IOException {
        // If we should hash this resource and can fallback safely, attempt to hash the resource.
        // If we encounter an error, or the hasher elects not to handle the resource, hash with
        // the delegate using the fallback safe context.

}

// MakeHasher returns a new Hasher instance.
func MakeHasher() Hasher {
	return Hasher{
		memo:       make(map[types.Type]uint32),
		ptrMap:     make(map[any]uint32),
		sigTParams: nil,
	}
}

// Hash computes a hash value for the given type t such that
// Identical(t, t') => Hash(t) == Hash(t').
func (h Hasher) Hash(t types.Type) uint32 {
	hash, ok := h.memo[t]
	if !ok {
		hash = h.hashFor(t)

Russ Cox <******@****.***> 1629910106 -0400

	"encoding/hex"

	"github.com/minio/minio/internal/hash/sha256"
)

// getSHA256Hash returns SHA-256 hash in hex encoding of given data.
func getSHA256Hash(data []byte) string {
	return hex.EncodeToString(getSHA256Sum(data))
}

// getSHA256Hash returns SHA-256 sum of given data.
func getSHA256Sum(data []byte) []byte {
	hash := sha256.New()
	hash.Write(data)
	return hash.Sum(nil)
}