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Zack Williamse940c7a2019-08-21 14:25:39 -07001// Copyright 2009 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// +build windows
6
7// Package windows contains an interface to the low-level operating system
8// primitives. OS details vary depending on the underlying system, and
9// by default, godoc will display the OS-specific documentation for the current
10// system. If you want godoc to display syscall documentation for another
11// system, set $GOOS and $GOARCH to the desired system. For example, if
12// you want to view documentation for freebsd/arm on linux/amd64, set $GOOS
13// to freebsd and $GOARCH to arm.
14//
15// The primary use of this package is inside other packages that provide a more
16// portable interface to the system, such as "os", "time" and "net". Use
17// those packages rather than this one if you can.
18//
19// For details of the functions and data types in this package consult
20// the manuals for the appropriate operating system.
21//
22// These calls return err == nil to indicate success; otherwise
23// err represents an operating system error describing the failure and
24// holds a value of type syscall.Errno.
25package windows // import "golang.org/x/sys/windows"
26
27import (
28 "syscall"
29)
30
31// ByteSliceFromString returns a NUL-terminated slice of bytes
32// containing the text of s. If s contains a NUL byte at any
33// location, it returns (nil, syscall.EINVAL).
34func ByteSliceFromString(s string) ([]byte, error) {
35 for i := 0; i < len(s); i++ {
36 if s[i] == 0 {
37 return nil, syscall.EINVAL
38 }
39 }
40 a := make([]byte, len(s)+1)
41 copy(a, s)
42 return a, nil
43}
44
45// BytePtrFromString returns a pointer to a NUL-terminated array of
46// bytes containing the text of s. If s contains a NUL byte at any
47// location, it returns (nil, syscall.EINVAL).
48func BytePtrFromString(s string) (*byte, error) {
49 a, err := ByteSliceFromString(s)
50 if err != nil {
51 return nil, err
52 }
53 return &a[0], nil
54}
55
56// Single-word zero for use when we need a valid pointer to 0 bytes.
57// See mksyscall.pl.
58var _zero uintptr
59
60func (ts *Timespec) Unix() (sec int64, nsec int64) {
61 return int64(ts.Sec), int64(ts.Nsec)
62}
63
64func (tv *Timeval) Unix() (sec int64, nsec int64) {
65 return int64(tv.Sec), int64(tv.Usec) * 1000
66}
67
68func (ts *Timespec) Nano() int64 {
69 return int64(ts.Sec)*1e9 + int64(ts.Nsec)
70}
71
72func (tv *Timeval) Nano() int64 {
73 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
74}