r.posv1()
	} else {
		r.posv0()
	}

	if r.prevFile == "" && r.prevLine == 0 && r.prevColumn == 0 {
		return token.NoPos
	}
	return r.p.fake.pos(r.prevFile, int(r.prevLine), int(r.prevColumn))
}

func (r *importReader) posv0() {
	delta := r.int64()
	if delta != deltaNewFile {
		r.prevLine += delta
	} else if l := r.int64(); l == -1 {
		r.prevLine += deltaNewFile
	} else {
		r.prevFile = r.string()

				p.print(blank)
			}
			// parameter type
			p.expr(stripParensAlways(par.Type))
			prevLine = parLineEnd
		}

		// if the closing ")" is on a separate line from the last parameter,
		// print an additional "," and line break
		if closing := p.lineFor(fields.Closing); 0 < prevLine && prevLine < closing {
			p.print(token.COMMA)
			p.linebreak(closing, 0, ignore, true)

	}
	if r.prevRune < 0 {
		return errors.New("strings.Reader.UnreadRune: previous operation was not ReadRune")
	}
	r.i = int64(r.prevRune)
	r.prevRune = -1
	return nil
}

// Seek implements the [io.Seeker] interface.
func (r *Reader) Seek(offset int64, whence int) (int64, error) {
	r.prevRune = -1
	var abs int64
	switch whence {
	case io.SeekStart:

	prevSize := 0
	var minAligns [pageShift + 1]int
	for i, c := range classes {
		if i == 0 {
			continue
		}
		spanSize := c.npages * pageSize
		objects := spanSize / c.size
		tailWaste := spanSize - c.size*(spanSize/c.size)
		maxWaste := float64((c.size-prevSize-1)*objects+tailWaste) / float64(spanSize)
		alignBits := bits.TrailingZeros(uint(c.size))

			*hh = uint32(di + d.hashOffset)
		}
	}
	// Update window information.
	d.windowEnd = n
	d.index = n
}

// Try to find a match starting at index whose length is greater than prevSize.
// We only look at chainCount possibilities before giving up.
func (d *compressor) findMatch(pos int, prevHead int, prevLength int, lookahead int) (length, offset int, ok bool) {
	minMatchLook := maxMatchLength