cmapt

type CMapRangeT struct {
	Prev           *CMapRangeT
	From, To, Dest int
}

type CMapT struct {
	Basic    [256]int    // basic characters
	Extended map[int]int // characters > 255
	Ranges   *CMapRangeT // ranges with growing content
	DRanges  *CMapRangeT // fixed ranges
}