mirror of
https://github.com/rclone/rclone.git
synced 2024-12-13 02:33:58 +01:00
49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
// 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 gen_bits.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 http://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(table0), func(j int) bool {
|
|
e := table0[j]
|
|
rOffset := rune(e >> shiftRuneOffset)
|
|
return r < rOffset
|
|
})
|
|
if i == 0 {
|
|
return ""
|
|
}
|
|
|
|
e := table0[i-1]
|
|
rOffset := rune(e >> shiftRuneOffset)
|
|
rLength := rune(e>>shiftRuneLength) & maskRuneLength
|
|
if r >= rOffset+rLength {
|
|
return ""
|
|
}
|
|
|
|
if (e>>shiftDirect)&maskDirect != 0 {
|
|
o := int(e>>shiftDataOffset) & maskDataOffset
|
|
n := int(e>>shiftDataLength) & maskDataLength
|
|
return data[o : o+n]
|
|
}
|
|
|
|
base := uint32(e>>shiftDataBase) & maskDataBase
|
|
base <<= dataBaseUnit
|
|
j := rune(e>>shiftTable1Offset) & maskTable1Offset
|
|
j += r - rOffset
|
|
d0 := base + uint32(table1[j-1]) // dataOffset
|
|
d1 := base + uint32(table1[j-0]) // dataOffset + dataLength
|
|
return data[d0:d1]
|
|
}
|