rsc.offset = rsc.size + offset
	}
	if rsc.offset < 0 {
		return rsc.offset, errors.New("seek to invalid negative offset")
	}
	if rsc.offset >= rsc.size {
		return rsc.offset, errors.New("seek past end of object")
	}
	if rsc.reader != nil {
		_ = rsc.reader.Close()
		rsc.reader = nil
	}
	return rsc.offset, nil
}

// Read call to implement io.Reader

	buf        []byte          // Holds bit-rot verified data
}

func (b *wholeBitrotReader) ReadAt(buf []byte, offset int64) (n int, err error) {
	if b.buf == nil {
		b.buf = make([]byte, b.tillOffset-offset)
		if _, err := b.disk.ReadFile(context.TODO(), b.volume, b.filePath, offset, b.buf, b.verifier); err != nil {
			return 0, err
		}
	}

func (d *naughtyDisk) ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {
	if err := d.calcError(); err != nil {
		return 0, err
	}
	return d.disk.ReadFile(ctx, volume, path, offset, buf, verifier)
}

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

	return p.storage.ListDir(ctx, origvolume, volume, dirPath, count)
}

// Legacy API - does not have any deadlines
func (p *xlStorageDiskIDCheck) ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {
	ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadFile, volume, path)
	if err != nil {
		return 0, err
	}
	defer done(&err)

			if typ.Is(ChecksumIncludesMultipart) {
				wantLen := int(t) * length
				if len(b) < wantLen {
					break
				}
				// Read part checksum
				if part > 0 && uint64(part) <= t {
					offset := (part - 1) * length
					partCs := b[offset:]
					cs = base64.StdEncoding.EncodeToString(partCs[:length])
				}
				b = b[wantLen:]
			}
		} else if part > 1 {
			// For non-multipart, checksum is part 1.
			cs = ""
		}

		}
		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",

		if err == nil {
			if etag != test.ETag {
				t.Fatalf("Test %d: ETag mismatch: got %s - want %s", i, etag, test.ETag)
			}
		}
	}
}

// Tests for issue reproduced when getting the right encrypted
// offset of the object.
func TestGetDecryptedRange_Issue50(t *testing.T) {
	rs, err := parseRequestRangeSpec("bytes=594870256-594870263")
	if err != nil {
		t.Fatal(err)
	}

	objInfo := ObjectInfo{

	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	objectRSC := s3select.NewObjectReadSeekCloser(
		func(offset int64) (io.ReadCloser, error) {
			rs := &HTTPRangeSpec{
				IsSuffixLength: false,
				Start:          offset,
				End:            -1,
			}
			opts.NoLock = true
			return getObjectNInfo(ctx, bucket, object, rs, r.Header, opts)
		},
		actualSize,
	)

	// Special care for CopyObjectPart
	if partRangeErr := checkCopyPartRangeWithSize(rs, actualPartSize); partRangeErr != nil {
		writeCopyPartErr(ctx, w, partRangeErr, r.URL)
		return
	}

	// Get the object offset & length
	startOffset, length, err := rs.GetOffsetLength(actualPartSize)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	if length < 0 {
		length = fi.Size - startOffset
	}

	// Reply back invalid range if the input offset and length fall out of range.
	if startOffset > fi.Size || startOffset+length > fi.Size {
		return InvalidRange{startOffset, length, fi.Size}
	}

	// Get start part index and offset.
	partIndex, partOffset, err := fi.ObjectToPartOffset(ctx, startOffset)
	if err != nil {