}

// FuncExpr represents a function call
type FuncExpr struct {
	SFunc     *SimpleArgFunc `parser:"  @@"`
	Count     *CountFunc     `parser:"| @@"`
	Cast      *CastFunc      `parser:"| @@"`
	Substring *SubstringFunc `parser:"| @@"`
	Extract   *ExtractFunc   `parser:"| @@"`
	Trim      *TrimFunc      `parser:"| @@"`
	DateAdd   *DateAddFunc   `parser:"| @@"`
	DateDiff  *DateDiffFunc  `parser:"| @@"`

		}
	}

	return r
}

// Maximum 4KiB size per object lock config.
const maxObjectLockConfigSize = 1 << 12

// ParseObjectLockConfig parses ObjectLockConfig from xml
func ParseObjectLockConfig(reader io.Reader) (*Config, error) {
	config := Config{}
	if err := xml.NewDecoder(io.LimitReader(reader, maxObjectLockConfigSize)).Decode(&config); err != nil {

			return true
		}
		if !rule.Transition.IsNull() { // this allows for Transition.Days to be zero.
			return true
		}

	}
	return false
}

// ParseLifecycleConfigWithID - parses for a Lifecycle config and assigns
// unique id to rules with empty ID.
func ParseLifecycleConfigWithID(r io.Reader) (*Lifecycle, error) {
	var lc Lifecycle
	if err := xml.NewDecoder(r).Decode(&lc); err != nil {

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
	}
	for _, baseDN := range l.LDAP.UserDNSearchBaseDistNames {
		if baseDN.Parsed.AncestorOf(udn) {
			return true
		}
	}

			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusLengthRequired,
		},
		// Test case - 4.
		// setting the readSeeker to `nil`, bucket policy parser will fail.
		{
			bucketName:         bucketName,
			bucketPolicyReader: nil,

			policyLen:          10,
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,

	"x-amz-date",
	"date",
}

// parseAmzDateHeader - parses supported amz date headers, in
// supported amz date formats.
func parseAmzDateHeader(req *http.Request) (time.Time, APIErrorCode) {
	for _, amzDateHeader := range amzDateHeaders {
		amzDateStr := req.Header.Get(amzDateHeader)
		if amzDateStr != "" {
			t, err := amztime.Parse(amzDateStr)
			if err != nil {
				return time.Time{}, ErrMalformedDate
			}

		if err != nil {
			return nil, err
		}

		qosEnv := target.EnvMQTTQoS
		if k != config.Default {
			qosEnv = qosEnv + config.Default + k
		}

		// Parse uint8 value
		qos, err := strconv.ParseUint(env.Get(qosEnv, kv.Get(target.MqttQoS)), 10, 8)
		if err != nil {
			return nil, err
		}

		topicEnv := target.EnvMQTTTopic
		if k != config.Default {

		if actualErrCode == ErrNone {
			// validating the extracted/parsed credential fields.
			validateCredentialfields(t, i+1, testCase.expectedAuthField.Credential, parsedAuthField.Credential)

			// validating the extraction/parsing of signature field.
			if !compareSignatureV4(testCase.expectedAuthField.Signature, parsedAuthField.Signature) {

		return nil, err
	}
	return etag, nil
}

// Parse parses s as an S3 ETag, returning the result.
// The string can be an encrypted, singlepart
// or multipart S3 ETag. It returns an error if s is
// not a valid textual representation of an ETag.
func Parse(s string) (ETag, error) {
	const strict = false
	return parse(s, strict)
}

// parse parse s as an S3 ETag, returning the result.

		}

		if err != nil && key != zeroKey {
			t.Errorf("Test %d: parsing failed and client key is not zero key", i)
		}
		if err == nil && key == zeroKey {
			t.Errorf("Test %d: parsed client key is zero key", i)
		}
	}
}

var ssecCopyParseTests = []struct {
	Header      http.Header
	ExpectedErr error
}{
	{
		Header: http.Header{