diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall.go | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall.go b/vendor/golang.org/x/sys/unix/syscall.go index fd4ee8e..649fa87 100644 --- a/vendor/golang.org/x/sys/unix/syscall.go +++ b/vendor/golang.org/x/sys/unix/syscall.go @@ -2,7 +2,8 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris +//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 @@ -24,7 +25,13 @@ // holds a value of type syscall.Errno. package unix // import "golang.org/x/sys/unix" -import "strings" +import ( + "bytes" + "strings" + "unsafe" + + "golang.org/x/sys/internal/unsafeheader" +) // ByteSliceFromString returns a NUL-terminated slice of bytes // containing the text of s. If s contains a NUL byte at any @@ -49,5 +56,40 @@ func BytePtrFromString(s string) (*byte, error) { 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) + } + + var s []byte + h := (*unsafeheader.Slice)(unsafe.Pointer(&s)) + h.Data = unsafe.Pointer(p) + h.Len = n + h.Cap = n + + return string(s) +} + // Single-word zero for use when we need a valid pointer to 0 bytes. var _zero uintptr |