// Modified for hash/crc64 by Klaus Post, 2024.
func gf2MatrixTimes(mat []uint64, vec uint64) uint64 {
	var sum uint64

	for vec != 0 {
		if vec&1 != 0 {
			sum ^= mat[0]
		}
		vec >>= 1
		mat = mat[1:]
	}
	return sum
}

func gf2MatrixSquare(square, mat []uint64) {
	if len(square) != len(mat) {
		panic("square matrix size mismatch")
	}

)

var parquetSupport bool

func init() {
	parquetSupport = env.Get("MINIO_API_SELECT_PARQUET", config.EnableOff) == config.EnableOn
}

var bufPool = bpool.Pool[*bytes.Buffer]{
	New: func() *bytes.Buffer {
		// make a buffer with a reasonable capacity.
		return bytes.NewBuffer(make([]byte, 0, maxRecordSize))
	},
}

var bufioWriterPool = bpool.Pool[*bufio.Writer]{
	New: func() *bufio.Writer {

	ctxCanceler context.CancelFunc
}

// start - starts separate goroutine for each TCP listener.  A valid new connection is passed to httpListener.acceptCh.
func (listener *httpListener) start() {
	// Closure to handle listener until httpListener.ctxDoneCh channel is closed.
	handleListener := func(idx int, ln net.Listener) {
		for {
			conn, err := ln.Accept()
			select {
			case listener.acceptCh <- acceptResult{conn, err, idx}:

				}
			}
		})
	}
}

func mustReader(t *testing.T, src io.Reader, size int64, md5Hex, sha256Hex string, actualSize int64) *Reader {
	r, err := NewReader(t.Context(), src, size, md5Hex, sha256Hex, actualSize)
	if err != nil {
		t.Fatal(err)
	}
	return r
}

// Tests NewReader() constructor with invalid arguments.
func TestHashReaderInvalidArguments(t *testing.T) {
	testCases := []struct {

var _VersionType_index = [...]uint8{0, 18, 28, 38, 48, 63}

func (i VersionType) String() string {
	if i >= VersionType(len(_VersionType_index)-1) {
		return "VersionType(" + strconv.FormatInt(int64(i), 10) + ")"
	}
	return _VersionType_name[_VersionType_index[i]:_VersionType_index[i+1]]
}
func _() {
	// An "invalid array index" compiler error signifies that the constant values have changed.

	return opts, nil
}

func getAndValidateAttributesOpts(ctx context.Context, w http.ResponseWriter, r *http.Request, bucket, object string) (opts ObjectOptions, valid bool) {
	var argumentName string
	var argumentValue string
	var apiErr APIError
	var err error
	valid = true

	defer func() {
		if valid {
			return
		}

	}
	return dur, nil
}

// ParsesAsDN determines if the given string could be a valid DN based on
// parsing alone.
func (l Config) ParsesAsDN(dn string) bool {
	_, err := ldap.ParseDN(dn)
	return err == nil
}

// IsLDAPUserDN determines if the given string could be a user DN from LDAP.
func (l Config) IsLDAPUserDN(user string) bool {
	udn, err := ldap.ParseDN(user)
	if err != nil {
		return false
	}

type healRoutine struct {
	tasks   chan healTask
	workers int
}

func activeListeners() int {
	// Bucket notification and http trace are not costly, it is okay to ignore them
	// while counting the number of concurrent connections
	return int(globalHTTPListen.Subscribers()) + int(globalTrace.Subscribers())
}

func waitForLowIO(maxIO int, maxWait time.Duration, currentIO func() int) {
	// No need to wait run at full speed.
	if maxIO <= 0 {

	peerResyncMap map[string]resyncState
}

func newSiteResyncMetrics(ctx context.Context) *siteResyncMetrics {
	s := siteResyncMetrics{
		resyncStatus:  make(map[string]SiteResyncStatus),
		peerResyncMap: make(map[string]resyncState),
	}
	go s.save(ctx)
	go s.init(ctx)
	return &s
}

// init site resync metrics
func (sm *siteResyncMetrics) init(ctx context.Context) {

	client     *kms.Client
}

func (c *kmsConn) Version(ctx context.Context) (string, error) {
	resp, err := c.client.Version(ctx, &kms.VersionRequest{})
	if len(resp) == 0 && err != nil {
		return "", err
	}
	return resp[0].Version, nil
}

func (c *kmsConn) APIs(ctx context.Context) ([]madmin.KMSAPI, error) {
	return nil, ErrNotSupported
}