Mercurial > yakumo_izuru > aya

comparison vendor/golang.org/x/sys/unix/dev_netbsd.go @ 66:787b5ee0289d draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use vendored modules Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>
author yakumo.izuru
date Sun, 23 Jul 2023 13:18:53 +0000
parents
children
comparison
equal deleted inserted replaced
65:6d985efa0f7a 66:787b5ee0289d
1 // Copyright 2017 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 // Functions to access/create device major and minor numbers matching the
6 // encoding used in NetBSD's sys/types.h header.
7
8 package unix
9
10 // Major returns the major component of a NetBSD device number.
11 func Major(dev uint64) uint32 {
12 return uint32((dev & 0x000fff00) >> 8)
13 }
14
15 // Minor returns the minor component of a NetBSD device number.
16 func Minor(dev uint64) uint32 {
17 minor := uint32((dev & 0x000000ff) >> 0)
18 minor |= uint32((dev & 0xfff00000) >> 12)
19 return minor
20 }
21
22 // Mkdev returns a NetBSD device number generated from the given major and minor
23 // components.
24 func Mkdev(major, minor uint32) uint64 {
25 dev := (uint64(major) << 8) & 0x000fff00
26 dev |= (uint64(minor) << 12) & 0xfff00000
27 dev |= (uint64(minor) << 0) & 0x000000ff
28 return dev
29 }