hdr.Linkname = gnuLongLink
			}
			if hdr.Typeflag == TypeRegA {
				if strings.HasSuffix(hdr.Name, "/") {
					hdr.Typeflag = TypeDir // Legacy archives use trailing slash for directories
				} else {
					hdr.Typeflag = TypeReg
				}
			}

			// The extended headers may have updated the size.
			// Thus, setup the regFileReader again after merging PAX headers.

		}
		if r.desr != nil {
			if err1 := readDataDescriptor(r.desr, r.f); err1 != nil {
				if err1 == io.EOF {
					err = io.ErrUnexpectedEOF
				} else {
					err = err1
				}
			} else if r.hash.Sum32() != r.f.CRC32 {
				err = ErrChecksum
			}
		} else {
			// If there's not a data descriptor, we still compare
			// the CRC32 of what we've read against the file header

	if size >= 0 {
		r := ioutil.HardLimitReader(src, size)
		if !disableMD5 {
			if _, ok := src.(etag.Tagger); !ok {
				src = etag.NewReader(ctx, r, MD5, forceMD5)
			} else {
				src = etag.Wrap(r, src)
			}
		} else {
			src = r
		}
	} else if _, ok := src.(etag.Tagger); !ok {
		if !disableMD5 {
			src = etag.NewReader(ctx, src, MD5, forceMD5)
		}
	}
	var h hash.Hash
	if len(SHA256) != 0 {