Mercurial > yakumo_izuru > aya

comparison vendor/golang.org/x/sys/windows/syscall.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 4b79810863f6
comparison
equal deleted inserted replaced
65:6d985efa0f7a 66:787b5ee0289d
1 // 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 //go:build windows
6 // +build windows
7
8 // Package windows contains an interface to the low-level operating system
9 // primitives. OS details vary depending on the underlying system, and
10 // by default, godoc will display the OS-specific documentation for the current
11 // system. If you want godoc to display syscall documentation for another
12 // system, set $GOOS and $GOARCH to the desired system. For example, if
13 // you want to view documentation for freebsd/arm on linux/amd64, set $GOOS
14 // to freebsd and $GOARCH to arm.
15 //
16 // The primary use of this package is inside other packages that provide a more
17 // portable interface to the system, such as "os", "time" and "net". Use
18 // those packages rather than this one if you can.
19 //
20 // For details of the functions and data types in this package consult
21 // the manuals for the appropriate operating system.
22 //
23 // These calls return err == nil to indicate success; otherwise
24 // err represents an operating system error describing the failure and
25 // holds a value of type syscall.Errno.
26 package windows // import "golang.org/x/sys/windows"
27
28 import (
29 "bytes"
30 "strings"
31 "syscall"
32 "unsafe"
33
34 "golang.org/x/sys/internal/unsafeheader"
35 )
36
37 // ByteSliceFromString returns a NUL-terminated slice of bytes
38 // containing the text of s. If s contains a NUL byte at any
39 // location, it returns (nil, syscall.EINVAL).
40 func ByteSliceFromString(s string) ([]byte, error) {
41 if strings.IndexByte(s, 0) != -1 {
42 return nil, syscall.EINVAL
43 }
44 a := make([]byte, len(s)+1)
45 copy(a, s)
46 return a, nil
47 }
48
49 // BytePtrFromString returns a pointer to a NUL-terminated array of
50 // bytes containing the text of s. If s contains a NUL byte at any
51 // location, it returns (nil, syscall.EINVAL).
52 func BytePtrFromString(s string) (*byte, error) {
53 a, err := ByteSliceFromString(s)
54 if err != nil {
55 return nil, err
56 }
57 return &a[0], nil
58 }
59
60 // ByteSliceToString returns a string form of the text represented by the slice s, with a terminating NUL and any
61 // bytes after the NUL removed.
62 func ByteSliceToString(s []byte) string {
63 if i := bytes.IndexByte(s, 0); i != -1 {
64 s = s[:i]
65 }
66 return string(s)
67 }
68
69 // BytePtrToString takes a pointer to a sequence of text and returns the corresponding string.
70 // If the pointer is nil, it returns the empty string. It assumes that the text sequence is terminated
71 // at a zero byte; if the zero byte is not present, the program may crash.
72 func BytePtrToString(p *byte) string {
73 if p == nil {
74 return ""
75 }
76 if *p == 0 {
77 return ""
78 }
79
80 // Find NUL terminator.
81 n := 0
82 for ptr := unsafe.Pointer(p); *(*byte)(ptr) != 0; n++ {
83 ptr = unsafe.Pointer(uintptr(ptr) + 1)
84 }
85
86 var s []byte
87 h := (*unsafeheader.Slice)(unsafe.Pointer(&s))
88 h.Data = unsafe.Pointer(p)
89 h.Len = n
90 h.Cap = n
91
92 return string(s)
93 }
94
95 // Single-word zero for use when we need a valid pointer to 0 bytes.
96 // See mksyscall.pl.
97 var _zero uintptr
98
99 func (ts *Timespec) Unix() (sec int64, nsec int64) {
100 return int64(ts.Sec), int64(ts.Nsec)
101 }
102
103 func (tv *Timeval) Unix() (sec int64, nsec int64) {
104 return int64(tv.Sec), int64(tv.Usec) * 1000
105 }
106
107 func (ts *Timespec) Nano() int64 {
108 return int64(ts.Sec)*1e9 + int64(ts.Nsec)
109 }
110
111 func (tv *Timeval) Nano() int64 {
112 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
113 }