code: func NewMultiple(buf []byte, options Options, h hash.Hash, compareOnMatch bool) *Cmp {
  	c := &Cmp{
  		Opt:              options,
  		hashType:         h,
  		hashMatchCompare: compareOnMatch,
  		hashTable:        map[string]hashSum{},
  		buf:              buf,
  	}
  	if c.buf == nil || len(c.buf) == 0 {
  		c.buf = make([]byte, defaultBufSize)
  	}
  	c.debugf("New: bufSize=%d\n", len(c.buf))
  	return c
  }
docs: // New creates Cmp for multiple comparison mode.