// digits after the decimal and the separator character (period or comma).
// These functions pack and unpack that variable.
func stdFracSecond(code, n, c int) int {
	// Use 0xfff to make the failure case even more absurd.
	if c == '.' {
		return code | ((n & 0xfff) << stdArgShift)
	}
	return code | ((n & 0xfff) << stdArgShift) | 1<<stdSeparatorShift
}

func digitsLen(std int) int {

				if retry == 0 {
					t.vlogf("RoundTrip retrying after failure: %v", roundTripErr)
					continue
				}
				backoff := float64(uint(1) << (uint(retry) - 1))
				backoff += backoff * (0.1 * mathrand.Float64())
				d := time.Second * time.Duration(backoff)
				tm := t.newTimer(d)
				select {
				case <-tm.C():
					t.vlogf("RoundTrip retrying after failure: %v", roundTripErr)
					continue

}

// doGrep looks for a regular expression in a buffer and fails if it
// is not found. The name argument is the name of the output we are
// searching, "output" or "error". The msg argument is logged on
// failure.
func (tg *testgoData) doGrep(match string, b *bytes.Buffer, name, msg string) {
	tg.t.Helper()
	if !tg.doGrepMatch(match, b) {
		tg.t.Log(msg)
		tg.t.Logf("pattern %v not found in standard %s", match, name)

	// same spot in sym.P), number of external _host_ relocations needed (i.e.
	// ELF/Mach-O/etc. relocations, not Go relocations, this must match ELF.Reloc1,
	// etc.), and a boolean indicating success/failure (a failing value indicates
	// a fatal error).
	Archreloc func(*Target, *loader.Loader, *ArchSyms, loader.Reloc, loader.Sym,
		int64) (relocatedOffset int64, nExtReloc int, ok bool)

	"strings"
	"unicode"
	"unicode/utf8"
)

// An Error describes a failure to parse a regular expression
// and gives the offending expression.
type Error struct {
	Code ErrorCode
	Expr string
}

func (e *Error) Error() string {
	return "error parsing regexp: " + e.Code.String() + ": `" + e.Expr + "`"
}

// An ErrorCode describes a failure to parse a regular expression.
type ErrorCode string

const (

	// untyped operand to the type of the other.
	// If mayConvert returns true, we try to convert the
	// operands to each other's types, and if that fails
	// we report a conversion failure.
	// If mayConvert returns false, we continue without an
	// attempt at conversion, and if the operand types are
	// not compatible, we report a type mismatch error.
	mayConvert := func(x, y *operand) bool {

// the errors that gcc prints. That is, this function expects
// gcc to fail.
func (p *Package) gccErrors(stdin []byte, extraArgs ...string) string {
	// TODO(rsc): require failure
	args := p.gccCmd()

	// Optimization options can confuse the error messages; remove them.
	nargs := make([]string, 0, len(args)+len(extraArgs))
	for _, arg := range args {
		if !strings.HasPrefix(arg, "-O") {

// If the file does not exist, WriteFile creates it with permissions perm (before umask);
// otherwise WriteFile truncates it before writing, without changing permissions.
// Since WriteFile requires multiple system calls to complete, a failure mid-operation
// can leave the file in a partially written state.
func WriteFile(name string, data []byte, perm FileMode) error {
	f, err := OpenFile(name, O_WRONLY|O_CREATE|O_TRUNC, perm)
	if err != nil {
		return err

// returned pointer is always heapArenaBytes-aligned and backed by
// h.arenas metadata. The returned size is always a multiple of
// heapArenaBytes. sysAlloc returns nil on failure.
// There is no corresponding free function.
//
// hintList is a list of hint addresses for where to allocate new
// heap arenas. It must be non-nil.
//

}

// PackagesAndErrors returns the packages named by the command line arguments
// 'patterns'. If a named package cannot be loaded, PackagesAndErrors returns
// a *Package with the Error field describing the failure. If errors are found
// loading imported packages, the DepsErrors field is set. The Incomplete field
// may be set as well.
//
// To obtain a flat list of packages, use PackageList.