}

func evalSQLSubstring(s string, startIdx, length int) (res string, err error) {
	rs := []rune(s)

	// According to s3 document, if startIdx < 1, it is set to 1.
	if startIdx < 1 {
		startIdx = 1
	}

	if startIdx > len(rs) {
		startIdx = len(rs) + 1
	}

	// StartIdx is 1-based in the input
	startIdx--
	endIdx := len(rs)
	if length != -1 {
		if length < 0 {
			return "", errInvalidSubstringIndexLen

			extractedSignedHeaders[http.CanonicalHeaderKey(header)] = r.TransferEncoding
		case "content-length":
			// Signature-V4 spec excludes Content-Length from signed headers list for signature calculation.
			// But some clients deviate from this rule. Hence we consider Content-Length for signature
			// calculation to be compatible with such clients.

		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Error out if Content-Length is missing.
	// PutBucketPolicy always needs Content-Length.
	if r.ContentLength <= 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL)
		return
	}

	// Error out if Content-Length is beyond allowed size.
	if r.ContentLength > maxBucketPolicySize {

			return keys, fmt.Errorf("xlMetaInlineData: key %d is length 0", i)
		}
		keys = append(keys, string(key))
		// Skip data...
		_, buf, err = msgp.ReadBytesZC(buf)
		if err != nil {
			return keys, err
		}
	}
	return keys, nil
}

// serialize will serialize the provided keys and values.
// The function will panic if keys/value slices aren't of equal length.

}

func (d *naughtyDisk) ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error) {
	if err := d.calcError(); err != nil {
		return nil, err
	}
	return d.disk.ReadFileStream(ctx, volume, path, offset, length)
}

func (d *naughtyDisk) CreateFile(ctx context.Context, origvolume, volume, path string, size int64, reader io.Reader) error {

type wholeBitrotReader struct {
	disk       StorageAPI
	volume     string
	filePath   string
	verifier   *BitrotVerifier // Holds the bit-rot info
	tillOffset int64           // Affects the length of data requested in disk.ReadFile depending on Read()'s offset
	buf        []byte          // Holds bit-rot verified data
}

func (b *wholeBitrotReader) ReadAt(buf []byte, offset int64) (n int, err error) {

		}
		o, l, err := rs.GetOffsetLength(resourceSize)
		if err != nil {
			t.Errorf("unexpected err: %v", err)
		}
		if o != testCase.expOffset || l != testCase.expLength {
			t.Errorf("Case %d: got bad offset/length: %d,%d expected: %d,%d",
				i, o, l, testCase.expOffset, testCase.expLength)
		}
	}

	unparsableRangeSpecs := []string{
		"bytes=-",
		"bytes==",
		"bytes==1-10",
		"bytes=",
		"bytes=aa",
		"aa",

	NoncurrentVersionTransition NoncurrentVersionTransition `xml:"NoncurrentVersionTransition,omitempty"`
}

var (
	errInvalidRuleID                  = Errorf("ID length is limited to 255 characters")
	errEmptyRuleStatus                = Errorf("Status should not be empty")
	errInvalidRuleStatus              = Errorf("Status must be set to either Enabled or Disabled")

// 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.

				t.Fatalf("Test %d: validation failed due to %v", i+1, err)
			}
			if len(tc.excludedPrefixes) > 0 {
				var mismatch bool
				if len(v.ExcludedPrefixes) != len(tc.excludedPrefixes) {
					t.Fatalf("Test %d: Expected length of excluded prefixes %d but got %d", i+1, len(tc.excludedPrefixes), len(v.ExcludedPrefixes))
				}
				var i int
				var eprefix string
				for i, eprefix = range tc.excludedPrefixes {