data   string
		off    int
		n      int
		bufLen int
		at     int
		exp    string
		err    error
	}{
		{data: "", off: 0, n: 10, bufLen: 2, at: 0, exp: "", err: EOF},
		{data: dat, off: 0, n: len(dat), bufLen: 0, at: 0, exp: "", err: nil},
		{data: dat, off: len(dat), n: 1, bufLen: 1, at: 0, exp: "", err: EOF},
		{data: dat, off: 0, n: len(dat) + 2, bufLen: len(dat), at: 0, exp: dat, err: nil},

		err = regLoadMUIString(syscall.Handle(k), pname, &buf[0], uint32(len(buf)), &buflen, 0, pdir)
	}

	for err == syscall.ERROR_MORE_DATA { // Grow buffer if needed
		if buflen <= uint32(len(buf)) {
			break // Buffer not growing, assume race; break
		}
		buf = make([]uint16, buflen)
		err = regLoadMUIString(syscall.Handle(k), pname, &buf[0], uint32(len(buf)), &buflen, 0, pdir)
	}

	if err != nil {
		return "", err
	}

	var _p0 uint32
	if disableAllPrivileges {
		_p0 = 1
	}
	r0, _, e1 := syscall.Syscall6(procAdjustTokenPrivileges.Addr(), 6, uintptr(token), uintptr(_p0), uintptr(unsafe.Pointer(newstate)), uintptr(buflen), uintptr(unsafe.Pointer(prevstate)), uintptr(unsafe.Pointer(returnlen)))

		unsafe.Pointer(&buf[0]),
		size(len(buf)),
		unsafe.Pointer(&nwritten),
	)
	// For some reason wasmtime returns ERANGE when the output buffer is
	// shorter than the symbolic link value. os.Readlink expects a nil
	// error and uses the fact that n is greater or equal to the buffer
	// length to assume that it needs to try again with a larger size.
	// This condition is handled in os.Readlink.
	return int(nwritten), errnoErr(errno)

	if err != nil {
		return err
	}
	defer syscall.CloseHandle(fd)

	buflen := uint32(rdb.header.ReparseDataLength) + uint32(unsafe.Sizeof(rdb.header))
	var bytesReturned uint32
	return syscall.DeviceIoControl(fd, windows.FSCTL_SET_REPARSE_POINT,
		(*byte)(unsafe.Pointer(&rdb.header)), buflen, nil, 0, &bytesReturned, nil)
}

func createMountPoint(link string, target *reparseData) error {

stuff: 1
	test-foo: 1
`
	testCases := []struct {
		bufLen    int
		expectLen int
		expectErr error
	}{
		{len(d), len(d), nil},
		{len(d) + 10, len(d), nil},
		{len(d) - 10, len(d) - 10, io.ErrShortBuffer},
	}

	for i, testCase := range testCases {
		r := NewDocumentDecoder(io.NopCloser(bytes.NewReader([]byte(d))))
		b := make([]byte, testCase.bufLen)
		n, err := r.Read(b)

	SYS_MLOCKALL               = 324 // { int mlockall(int how); }
	SYS_MUNLOCKALL             = 325 // { int munlockall(void); }
	SYS___GETCWD               = 326 // { int __getcwd(u_char *buf, u_int buflen); }
	SYS_SCHED_SETPARAM         = 327 // { int sched_setparam (pid_t pid, const struct sched_param *param); }
	SYS_SCHED_GETPARAM         = 328 // { int sched_getparam (pid_t pid, struct sched_param *param); }

//go:linkname proc_regionfilename runtime/pprof.proc_regionfilename
func proc_regionfilename(pid int, address uint64, buf *byte, buflen int64) int32 {
	args := struct {
		pid     int
		address uint64
		buf     *byte
		bufSize int64
	}{
		pid:     pid,
		address: address,
		buf:     buf,
		bufSize: buflen,
	}
	return libcCall(unsafe.Pointer(abi.FuncPCABI0(proc_regionfilename_trampoline)), unsafe.Pointer(&args))
}

	SYS_MLOCKALL               = 324 // { int mlockall(int how); }
	SYS_MUNLOCKALL             = 325 // { int munlockall(void); }
	SYS___GETCWD               = 326 // { int __getcwd(u_char *buf, u_int buflen); }
	SYS_SCHED_SETPARAM         = 327 // { int sched_setparam (pid_t pid, const struct sched_param *param); }
	SYS_SCHED_GETPARAM         = 328 // { int sched_getparam (pid_t pid, struct sched_param *param); }

//sys	VirtualQuery(address uintptr, buffer *MemoryBasicInformation, length uintptr) (err error) = kernel32.VirtualQuery
//sys	GetTempPath2(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPath2W

const (
	// flags for CreateToolhelp32Snapshot
	TH32CS_SNAPMODULE   = 0x08
	TH32CS_SNAPMODULE32 = 0x10