rss-tools: vendor/golang.org/x/sys/unix/dev

rss-tools/vendor/golang.org/x/sys/unix/dev_netbsd.go (view raw)

Oleksandr Smirnov we're vendoring now, 7 days ago

// Copyright 2017 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.

// Functions to access/create device major and minor numbers matching the
// encoding used in NetBSD's sys/types.h header.

package unix

// Major returns the major component of a NetBSD device number.
func Major(dev uint64) uint32 {
	return uint32((dev & 0x000fff00) >> 8)
}

// Minor returns the minor component of a NetBSD device number.
func Minor(dev uint64) uint32 {
	minor := uint32((dev & 0x000000ff) >> 0)
	minor |= uint32((dev & 0xfff00000) >> 12)
	return minor
}

// Mkdev returns a NetBSD device number generated from the given major and minor
// components.
func Mkdev(major, minor uint32) uint64 {
	dev := (uint64(major) << 8) & 0x000fff00
	dev |= (uint64(minor) << 12) & 0xfff00000
	dev |= (uint64(minor) << 0) & 0x000000ff
	return dev
}

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	}