// Len returns the number of bytes of the unread portion of the
// string.
func (r *Reader) Len() int {
	if r.i >= int64(len(r.s)) {
		return 0
	}
	return int(int64(len(r.s)) - r.i)
}

// Size returns the original length of the underlying string.
// Size is the number of bytes available for reading via [Reader.ReadAt].
// The returned value is always the same and is not affected by calls
// to any other method.

		switch {
		case m.Decl == nil:
			// exclude conflict entry
		case allMethods, m.Level == 0, !token.IsExported(removeStar(m.Orig)):
			// forced inclusion, method not embedded, or method
			// embedded but original receiver type not exported
			list[i] = m
			i++
		}
	}
	list = list[0:i]
	slices.SortFunc(list, func(a, b *Func) int {
		return strings.Compare(a.Name, b.Name)
	})
	return list
}

	if checksum != z.digest.Sum32() {
		z.err = ErrChecksum
		return n, z.err
	}
	return n, io.EOF
}

// Calling Close does not close the wrapped [io.Reader] originally passed to [NewReader].
// In order for the ZLIB checksum to be verified, the reader must be
// fully consumed until the [io.EOF].
func (z *reader) Close() error {
	if z.err != nil && z.err != io.EOF {
		return z.err

}

// mergePAX merges paxHdrs into hdr for all relevant fields of Header.
func mergePAX(hdr *Header, paxHdrs map[string]string) (err error) {
	for k, v := range paxHdrs {
		if v == "" {
			continue // Keep the original USTAR value
		}
		var id64 int64
		switch k {
		case paxPath:
			hdr.Name = v
		case paxLinkpath:
			hdr.Linkname = v
		case paxUname:
			hdr.Uname = v
		case paxGname:
			hdr.Gname = v

	// we assume that it is YCbCrK. This matches libjpeg's jdapimin.c.
	if d.adobeTransform != adobeTransformUnknown {
		// Convert the YCbCr part of the YCbCrK to RGB, invert the RGB to get
		// CMY, and patch in the original K. The RGB to CMY inversion cancels
		// out the 'Adobe inversion' described in the applyBlack doc comment
		// above, so in practice, only the fourth channel (black) is inverted.
		bounds := d.img3.Bounds()