func (dd *dictDecoder) availRead() int {
	return dd.wrPos - dd.rdPos
}

// availWrite reports the available amount of output buffer space.
func (dd *dictDecoder) availWrite() int {
	return len(dd.hist) - dd.wrPos
}

// writeSlice returns a slice of the available buffer to write data to.
//
// This invariant will be kept: len(s) <= availWrite()
func (dd *dictDecoder) writeSlice() []byte {
	return dd.hist[dd.wrPos:]
}

			if cnt == 0 {
				cnt = dd.writeCopy(dist, length)
			}

			length -= cnt
			if dd.availWrite() == 0 {
				got.Write(dd.readFlush())
			}
		}
	}
	var writeString = func(str string) {
		for len(str) > 0 {
			cnt := copy(dd.writeSlice(), str)
			str = str[cnt:]
			dd.writeMark(cnt)
			if dd.availWrite() == 0 {
				got.Write(dd.readFlush())
			}
		}
	}

	writeString(".")
	want.WriteByte('.')

			for {
				n, err := r.Read(readBuf)
				if err == io.EOF {
					// If the availWrite == windowSize, then that means that the
					// previous Read returned because the write buffer was full
					// and it just so happened that the stream had no more data.
					// This situation is rare, but unavoidable.
					if r.(*decompressor).dict.availWrite() == windowSize {
						earlyEOF = false
					}

					if n == 0 && earlyEOF {

		if err != nil {
			f.err = err
			return
		}
		var n uint // number of bits extra
		var length int
		switch {
		case v < 256:
			f.dict.writeByte(byte(v))
			if f.dict.availWrite() == 0 {
				f.toRead = f.dict.readFlush()
				f.step = (*decompressor).huffmanBlock
				f.stepState = stateInit
				return
			}
			goto readLiteral
		case v == 256:
			f.finishBlock()
			return