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authorEmile <git@emile.space>2024-10-25 15:55:50 +0200
committerEmile <git@emile.space>2024-10-25 15:55:50 +0200
commitc90f36e3dd179d2de96f4f5fe38d8dc9a9de6dfe (patch)
tree89e9afb41c5bf76f48cfb09305a2d3db8d302b06 /vendor/golang.org/x/sys/unix/dev_dragonfly.go
parent98bbb0f559a8883bc47bae80607dbe326a448e61 (diff)
vendor HEAD main
Diffstat (limited to 'vendor/golang.org/x/sys/unix/dev_dragonfly.go')
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diff --git a/vendor/golang.org/x/sys/unix/dev_dragonfly.go b/vendor/golang.org/x/sys/unix/dev_dragonfly.go
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+++ b/vendor/golang.org/x/sys/unix/dev_dragonfly.go
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+// 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 Dragonfly's sys/types.h header.
+//
+// The information below is extracted and adapted from sys/types.h:
+//
+// Minor gives a cookie instead of an index since in order to avoid changing the
+// meanings of bits 0-15 or wasting time and space shifting bits 16-31 for
+// devices that don't use them.
+
+package unix
+
+// Major returns the major component of a DragonFlyBSD device number.
+func Major(dev uint64) uint32 {
+	return uint32((dev >> 8) & 0xff)
+}
+
+// Minor returns the minor component of a DragonFlyBSD device number.
+func Minor(dev uint64) uint32 {
+	return uint32(dev & 0xffff00ff)
+}
+
+// Mkdev returns a DragonFlyBSD device number generated from the given major and
+// minor components.
+func Mkdev(major, minor uint32) uint64 {
+	return (uint64(major) << 8) | uint64(minor)
+}