podman
1// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
2
3// Copyright 2016 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7package idna8
9// Sparse block handling code.
10
11type valueRange struct {12value uint16 // header: value:stride13lo, hi byte // header: lo:n14}
15
16type sparseBlocks struct {17values []valueRange18offset []uint1619}
20
21var idnaSparse = sparseBlocks{22values: idnaSparseValues[:],23offset: idnaSparseOffset[:],24}
25
26// Don't use newIdnaTrie to avoid unconditional linking in of the table.
27var trie = &idnaTrie{}28
29// lookup determines the type of block n and looks up the value for b.
30// For n < t.cutoff, the block is a simple lookup table. Otherwise, the block
31// is a list of ranges with an accompanying value. Given a matching range r,
32// the value for b is by r.value + (b - r.lo) * stride.
33func (t *sparseBlocks) lookup(n uint32, b byte) uint16 {34offset := t.offset[n]35header := t.values[offset]36lo := offset + 137hi := lo + uint16(header.lo)38for lo < hi {39m := lo + (hi-lo)/240r := t.values[m]41if r.lo <= b && b <= r.hi {42return r.value + uint16(b-r.lo)*header.value43}44if b < r.lo {45hi = m46} else {47lo = m + 148}49}50return 051}
52