// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package norm

type valueRange struct {
	value  uint16 // header: value:stride
	lo, hi byte   // header: lo:n
}

type sparseBlocks struct {
	values []valueRange
	offset []uint16
}

var nfcSparse = sparseBlocks{
	values: nfcSparseValues[:],
	offset: nfcSparseOffset[:],
}

var nfkcSparse = sparseBlocks{
	values: nfkcSparseValues[:],
	offset: nfkcSparseOffset[:],
}

var (
	nfcData  = newNfcTrie(0)
	nfkcData = newNfkcTrie(0)
)

// lookupValue determines the type of block n and looks up the value for b.
// For n < t.cutoff, the block is a simple lookup table. Otherwise, the block
// is a list of ranges with an accompanying value. Given a matching range r,
// the value for b is by r.value + (b - r.lo) * stride.
func ( *sparseBlocks) ( uint32,  byte) uint16 {
	 := .offset[]
	 := .values[]
	 :=  + 1
	 :=  + uint16(.lo)
	for  <  {
		 :=  + (-)/2
		 := .values[]
		if .lo <=  &&  <= .hi {
			return .value + uint16(-.lo)*.value
		}
		if  < .lo {
			 = 
		} else {
			 =  + 1
		}
	}
	return 0
}