diff options
Diffstat (limited to 'vendor/golang.org/x/sys/windows/syscall_windows.go')
| -rw-r--r-- | vendor/golang.org/x/sys/windows/syscall_windows.go | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/vendor/golang.org/x/sys/windows/syscall_windows.go b/vendor/golang.org/x/sys/windows/syscall_windows.go index 053d664d0..12c0544cb 100644 --- a/vendor/golang.org/x/sys/windows/syscall_windows.go +++ b/vendor/golang.org/x/sys/windows/syscall_windows.go @@ -13,6 +13,8 @@ import ( "time" "unicode/utf16" "unsafe" + + "golang.org/x/sys/internal/unsafeheader" ) type Handle uintptr @@ -117,6 +119,32 @@ func UTF16PtrFromString(s string) (*uint16, error) { return &a[0], nil } +// UTF16PtrToString takes a pointer to a UTF-16 sequence and returns the corresponding UTF-8 encoded string. +// If the pointer is nil, this returns the empty string. This assumes that the UTF-16 sequence is terminated +// at a zero word; if the zero word is not present, the program may crash. +func UTF16PtrToString(p *uint16) string { + if p == nil { + return "" + } + if *p == 0 { + return "" + } + + // Find NUL terminator. + n := 0 + for ptr := unsafe.Pointer(p); *(*uint16)(ptr) != 0; n++ { + ptr = unsafe.Pointer(uintptr(ptr) + unsafe.Sizeof(*p)) + } + + var s []uint16 + h := (*unsafeheader.Slice)(unsafe.Pointer(&s)) + h.Data = unsafe.Pointer(p) + h.Len = n + h.Cap = n + + return string(utf16.Decode(s)) +} + func Getpagesize() int { return 4096 } // NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention. @@ -1181,7 +1209,12 @@ type IPv6Mreq struct { Interface uint32 } -func GetsockoptInt(fd Handle, level, opt int) (int, error) { return -1, syscall.EWINDOWS } +func GetsockoptInt(fd Handle, level, opt int) (int, error) { + v := int32(0) + l := int32(unsafe.Sizeof(v)) + err := Getsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), &l) + return int(v), err +} func SetsockoptLinger(fd Handle, level, opt int, l *Linger) (err error) { sys := sysLinger{Onoff: uint16(l.Onoff), Linger: uint16(l.Linger)} @@ -1378,7 +1411,7 @@ func (t Token) KnownFolderPath(folderID *KNOWNFOLDERID, flags uint32) (string, e return "", err } defer CoTaskMemFree(unsafe.Pointer(p)) - return UTF16ToString((*[(1 << 30) - 1]uint16)(unsafe.Pointer(p))[:]), nil + return UTF16PtrToString(p), nil } // RtlGetVersion returns the version of the underlying operating system, ignoring |