}

func flushTransform(rb *reorderBuffer) bool {
	// Write out (must fully fit in dst, or else it is an ErrShortDst).
	if len(rb.out) < rb.nrune*utf8.UTFMax {
		return false
	}
	rb.out = rb.out[rb.flushCopy(rb.out):]
	return true
}

var errs = []error{nil, transform.ErrShortDst, transform.ErrShortSrc}

// transform implements the transform.Transformer interface. It is only called

func nextMultiNorm(i *Iter) []byte {
	j := 0
	d := i.multiSeg
	for j < len(d) {
		info := i.rb.f.info(input{bytes: d}, j)
		if info.BoundaryBefore() {
			i.rb.compose()
			seg := i.buf[:i.rb.flushCopy(i.buf[:])]
			i.rb.insertUnsafe(input{bytes: d}, j, info)
			i.multiSeg = d[j+int(info.size):]
			return seg
		}
		i.rb.insertUnsafe(input{bytes: d}, j, info)
		j += int(info.size)
	}
	i.multiSeg = nil

}

func flushTransform(rb *reorderBuffer) bool {
	// Write out (must fully fit in dst, or else it is an ErrShortDst).
	if len(rb.out) < rb.nrune*utf8.UTFMax {
		return false
	}
	rb.out = rb.out[rb.flushCopy(rb.out):]
	return true
}

var errs = []error{nil, transform.ErrShortDst, transform.ErrShortSrc}

// transform implements the transform.Transformer interface. It is only called

func nextMultiNorm(i *Iter) []byte {
	j := 0
	d := i.multiSeg
	for j < len(d) {
		info := i.rb.f.info(input{bytes: d}, j)
		if info.BoundaryBefore() {
			i.rb.compose()
			seg := i.buf[:i.rb.flushCopy(i.buf[:])]
			i.rb.insertUnsafe(input{bytes: d}, j, info)
			i.multiSeg = d[j+int(info.size):]
			return seg
		}
		i.rb.insertUnsafe(input{bytes: d}, j, info)
		j += int(info.size)
	}
	i.multiSeg = nil

		end := start + rb.rune[i].size
		out = append(out, rb.byte[start:end]...)
	}
	rb.reset()
	return out
}

// flushCopy copies the normalized segment to buf and resets rb.
// It returns the number of bytes written to buf.
func (rb *reorderBuffer) flushCopy(buf []byte) int {
	p := 0
	for i := 0; i < rb.nrune; i++ {
		runep := rb.rune[i]
		p += copy(buf[p:], rb.byte[runep.pos:runep.pos+runep.size])
	}

		end := start + rb.rune[i].size
		out = append(out, rb.byte[start:end]...)
	}
	rb.reset()
	return out
}

// flushCopy copies the normalized segment to buf and resets rb.
// It returns the number of bytes written to buf.
func (rb *reorderBuffer) flushCopy(buf []byte) int {
	p := 0
	for i := 0; i < rb.nrune; i++ {
		runep := rb.rune[i]
		p += copy(buf[p:], rb.byte[runep.pos:runep.pos+runep.size])
	}