octBits := uint(n-1) * 3
	return x >= 0 && (n >= 22 || x < 1<<octBits)
}

// parsePAXTime takes a string of the form %d.%d as described in the PAX
// specification. Note that this implementation allows for negative timestamps,
// which is allowed for by the PAX specification, but not always portable.
func parsePAXTime(s string) (time.Time, error) {
	const maxNanoSecondDigits = 9

	// Split string into seconds and sub-seconds parts.

// the maximum number of bytes allowed for each string field and
// the integer type used to store each numeric field
// (where timestamps are stored as the number of seconds since the Unix epoch).
//
// The table's lower portion shows specialized features of each format,
// such as supported string encodings, support for sub-second timestamps,
// or support for sparse files.
//
// The Writer currently provides no support for sparse files.
type Format int

struct {
	x, y float64 ""  // an empty tag string is like an absent tag
	name string  "any string is permitted as a tag"
	_    [4]byte "ceci n'est pas un champ de structure"
}

// A struct corresponding to a TimeStamp protocol buffer.
// The tag strings define the protocol buffer field numbers;
// they follow the convention outlined by the reflect package.
struct {
	microsec  uint64 `protobuf:"1"`

pkg syscall (freebsd-386-cgo), const SCM_BINTIME ideal-int
pkg syscall (freebsd-386-cgo), const SCM_CREDS ideal-int
pkg syscall (freebsd-386-cgo), const SCM_RIGHTS ideal-int
pkg syscall (freebsd-386-cgo), const SCM_TIMESTAMP ideal-int
pkg syscall (freebsd-386-cgo), const SIGCHLD Signal
pkg syscall (freebsd-386-cgo), const SIGCONT Signal
pkg syscall (freebsd-386-cgo), const SIGEMT Signal
pkg syscall (freebsd-386-cgo), const SIGINFO Signal