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// Copyright 2016 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.
//go:generate go run gen.go
// Package runenames provides rune names from the Unicode Character Database.
// For example, the name for '\u0100' is "LATIN CAPITAL LETTER A WITH MACRON".
//
// See https://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
package runenames
import (
"sort"
)
// Name returns the name for r.
func Name(r rune) string {
i := sort.Search(len(entries), func(j int) bool {
return entries[j].startRune() > r
})
if i == 0 {
return ""
}
e := entries[i-1]
offset := int(r - e.startRune())
if offset >= e.numRunes() {
return ""
}
if e.direct() {
o := e.index()
n := e.len()
return directData[o : o+n]
}
start := int(index[e.index()+offset])
end := int(index[e.index()+offset+1])
base1 := e.base() << 16
base2 := base1
if start > end {
base2 += 1 << 16
}
return singleData[start+base1 : end+base2]
}
func (e entry) len() int { return e.base() }
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