mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
88 lines
2.9 KiB
Go
88 lines
2.9 KiB
Go
// Copyright 2009 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.
|
|
|
|
//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
|
|
// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
|
|
|
|
// Package unix contains an interface to the low-level operating system
|
|
// primitives. OS details vary depending on the underlying system, and
|
|
// by default, godoc will display OS-specific documentation for the current
|
|
// system. If you want godoc to display OS documentation for another
|
|
// system, set $GOOS and $GOARCH to the desired system. For example, if
|
|
// you want to view documentation for freebsd/arm on linux/amd64, set $GOOS
|
|
// to freebsd and $GOARCH to arm.
|
|
//
|
|
// The primary use of this package is inside other packages that provide a more
|
|
// portable interface to the system, such as "os", "time" and "net". Use
|
|
// those packages rather than this one if you can.
|
|
//
|
|
// For details of the functions and data types in this package consult
|
|
// the manuals for the appropriate operating system.
|
|
//
|
|
// These calls return err == nil to indicate success; otherwise
|
|
// err represents an operating system error describing the failure and
|
|
// holds a value of type syscall.Errno.
|
|
package unix // import "golang.org/x/sys/unix"
|
|
|
|
import (
|
|
"bytes"
|
|
"strings"
|
|
"unsafe"
|
|
)
|
|
|
|
// ByteSliceFromString returns a NUL-terminated slice of bytes
|
|
// containing the text of s. If s contains a NUL byte at any
|
|
// location, it returns (nil, EINVAL).
|
|
func ByteSliceFromString(s string) ([]byte, error) {
|
|
if strings.IndexByte(s, 0) != -1 {
|
|
return nil, EINVAL
|
|
}
|
|
a := make([]byte, len(s)+1)
|
|
copy(a, s)
|
|
return a, nil
|
|
}
|
|
|
|
// BytePtrFromString returns a pointer to a NUL-terminated array of
|
|
// bytes containing the text of s. If s contains a NUL byte at any
|
|
// location, it returns (nil, EINVAL).
|
|
func BytePtrFromString(s string) (*byte, error) {
|
|
a, err := ByteSliceFromString(s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &a[0], nil
|
|
}
|
|
|
|
// ByteSliceToString returns a string form of the text represented by the slice s, with a terminating NUL and any
|
|
// bytes after the NUL removed.
|
|
func ByteSliceToString(s []byte) string {
|
|
if i := bytes.IndexByte(s, 0); i != -1 {
|
|
s = s[:i]
|
|
}
|
|
return string(s)
|
|
}
|
|
|
|
// BytePtrToString takes a pointer to a sequence of text and returns the corresponding string.
|
|
// If the pointer is nil, it returns the empty string. It assumes that the text sequence is terminated
|
|
// at a zero byte; if the zero byte is not present, the program may crash.
|
|
func BytePtrToString(p *byte) string {
|
|
if p == nil {
|
|
return ""
|
|
}
|
|
if *p == 0 {
|
|
return ""
|
|
}
|
|
|
|
// Find NUL terminator.
|
|
n := 0
|
|
for ptr := unsafe.Pointer(p); *(*byte)(ptr) != 0; n++ {
|
|
ptr = unsafe.Pointer(uintptr(ptr) + 1)
|
|
}
|
|
|
|
return string(unsafe.Slice(p, n))
|
|
}
|
|
|
|
// Single-word zero for use when we need a valid pointer to 0 bytes.
|
|
var _zero uintptr
|