// gmp 5.0.0+ changed the type of the 3rd argument to mp_bitcnt_t,
// so, to support older versions, we wrap these two functions.
void _mpz_mul_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
	mpz_mul_2exp(a, b, n);
}
void _mpz_div_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
	mpz_div_2exp(a, b, n);
}
*/
import "C"

import (
	"os"
	"unsafe"
)

/*
 * one of a kind
 */

	nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
	const nameBufLen = uint16(len(nameBuf))
	limit := dirent.Reclen - fixedHdr
	if limit > nameBufLen {
		limit = nameBufLen
	}
	// Avoid bugs in long file names
	// https://github.com/golang/tools/commit/5f9a5413737ba4b4f692214aebee582b47c8be74
	nameLen := bytes.IndexByte(nameBuf[:limit], 0)
	if nameLen < 0 {
		return 0, fmt.Errorf("failed to find terminating 0 byte in dirent")

Further any secret key (apart from the KMS-generated ones) is 256 bits long. The KMS-generated keys may be 256 bits but this depends on the KMS capabilities and configuration.

			Name:     "bar",
			Linkname: "PAX4/PAX4/long-linkpath-name",
			ModTime:  time.Unix(0, 0),
			Typeflag: '2',
			PAXRecords: map[string]string{
				"linkpath": "PAX4/PAX4/long-linkpath-name",
			},
			Format: FormatPAX,
		}},
	}, {
		// Both BSD and GNU tar truncate long names at first NUL even
		// if there is data following that NUL character.
		// This is reasonable as GNU long names are C-strings.

        new ReleasedVersions(snapshot, rc, versions)
    }

    ReleasedVersion releasedVersion(String version, long date = System.currentTimeMillis()) {
        new ReleasedVersion(version, format.format(new Date(date)))
    }

    ReleasedVersion snapshot(String baseVersion, long date = System.currentTimeMillis()) {
        releasedVersion("${baseVersion}-${format.format(new Date(date))}", date)
    }

// errTooManyOpenFiles - too many open files.
var errTooManyOpenFiles = StorageErr("too many open files, please increase 'ulimit -n'")

// errFileNameTooLong - given file name is too long than supported length.
var errFileNameTooLong = StorageErr("file name too long")

// errVolumeExists - cannot create same volume again.
var errVolumeExists = StorageErr("volume already exists")

// errIsNotRegular - not of regular file type.

		return key, ErrMissingCustomerKeyMD5
	}

	clientKey, err := base64.StdEncoding.DecodeString(h.Get(xhttp.AmzServerSideEncryptionCopyCustomerKey))
	if err != nil || len(clientKey) != 32 { // The client key must be 256 bits long
		return key, ErrInvalidCustomerKey
	}
	keyMD5, err := base64.StdEncoding.DecodeString(h.Get(xhttp.AmzServerSideEncryptionCopyCustomerKeyMD5))
	if md5Sum := md5.Sum(clientKey); err != nil || !bytes.Equal(md5Sum[:], keyMD5) {

	// nopHeal is a no operating healing action to
	// wait for the current healing operation to finish
	nopHeal = ""
)

var (
	errHealIdleTimeout   = errors.New("healing results were not consumed for too long")
	errHealStopSignalled = errors.New("heal stop signaled")

	errFnHealFromAPIErr = func(ctx context.Context, err error) error {
		apiErr := toAdminAPIErr(ctx, err)
		return fmt.Errorf("Heal internal error: %s: %s",

	// path cannot be so long that you cannot append an 8.3 file
	// name (that is, the directory name cannot exceed MAX_PATH
	// minus 12)." Since MAX_PATH is 260, 260 - 12 = 248.
	//
	// The MSDN docs appear to say that a normal path that is 248 bytes long
	// will work; empirically the path must be less then 248 bytes long.
	if len(path) < 248 {

	if gotSource != expectedSource {
		t.Errorf("expected : %s, got : %s", expectedSource, gotSource)
	}
}

// Test lock race
func TestNSLockRace(t *testing.T) {
	t.Skip("long test skip it")

	ctx := t.Context()

	for i := range 10000 {
		nsLk := newNSLock(false)

		// lk1; ref=1
		if !nsLk.lock(ctx, "volume", "path", "source", "opsID", false, time.Second) {