if (((t->tm_yday + 7 - (t->tm_wday + 1)) % 7) >= 4) {
int days = (((t)->tm_yday + 7 - \ ((t)->tm_wday ? (t)->tm_wday - 1 : 6)) % 7);   if (days >= 4) {
_fmt(format, t)	register const char *format;	const struct tm *t;{	for (; *format; ++format) {		if (*format == '%') {			++format;			if (*format == 'E') {				/* Alternate Era */				++format;			} else if (*format == 'O') {				/* Alternate numeric symbols */				++format;			}			switch(*format) {			case '\0':				--format;				break;			case 'A':				if (t->tm_wday < 0 || t->tm_wday > 6)					return(0);				if (!_add(_CurrentTimeLocale->day[t->tm_wday]))					return(0);				continue;			case 'a':				if (t->tm_wday < 0 || t->tm_wday > 6)					return(0);				if (!_add(_CurrentTimeLocale->abday[t->tm_wday]))					return(0);				continue;			case 'B':				if (t->tm_mon < 0 || t->tm_mon > 11)					return(0);				if (!_add(_CurrentTimeLocale->mon[t->tm_mon]))					return(0);				continue;			case 'b':			case 'h':				if (t->tm_mon < 0 || t->tm_mon > 11)					return(0);				if (!_add(_CurrentTimeLocale->abmon[t->tm_mon]))					return(0);				continue;			case 'C':				if (!_conv((t->tm_year + TM_YEAR_BASE) / 100,				    2, '0'))					return(0);				continue;			case 'c':				if (!_fmt(_CurrentTimeLocale->d_t_fmt, t))					return(0);				continue;			case 'D':				if (!_fmt("%m/%d/%y", t))					return(0);				continue;			case 'd':				if (!_conv(t->tm_mday, 2, '0'))					return(0);				continue;			case 'e':				if (!_conv(t->tm_mday, 2, ' '))					return(0);				continue;			case 'H':				if (!_conv(t->tm_hour, 2, '0'))					return(0);				continue;			case 'I':				if (!_conv(t->tm_hour % 12 ?				    t->tm_hour % 12 : 12, 2, '0'))					return(0);				continue;			case 'j':				if (!_conv(t->tm_yday + 1, 3, '0'))					return(0);				continue;			case 'k':				if (!_conv(t->tm_hour, 2, ' '))					return(0);				continue;			case 'l':				if (!_conv(t->tm_hour % 12 ?				    t->tm_hour % 12: 12, 2, ' '))					return(0);				continue;			case 'M':				if (!_conv(t->tm_min, 2, '0'))					return(0);				continue;			case 'm':				if (!_conv(t->tm_mon + 1, 2, '0'))					return(0);				continue;			case 'n':				if (!_add("\n"))					return(0);				continue;			case 'p':				if (!_add(_CurrentTimeLocale->am_pm[t->tm_hour >= 12]))					return(0);				continue;			case 'R':				if (!_fmt("%H:%M", t))					return(0);				continue;			case 'r':				if (!_fmt(_CurrentTimeLocale->t_fmt_ampm, t))					return(0);				continue;			case 'S':				if (!_conv(t->tm_sec, 2, '0'))					return(0);				continue;			case 's':				if (!_secs(t))					return(0);				continue;			case 'T':				if (!_fmt("%H:%M:%S", t))					return(0);				continue;			case 't':				if (!_add("\t"))					return(0);				continue;			case 'U':				if (!_conv(SUN_WEEK(t), 2, '0'))					return(0);				continue;			case 'u':				if (!_conv(t->tm_wday ? t->tm_wday : 7, 1, '0'))					return(0);				continue;			case 'V':				{				/* ISO 8601 Week Of Year:				   If the week (Monday - Sunday) containing				   January 1 has four or more days in the new 				   year, then it is week 1; otherwise it is 				   week 53 of the previous year and the next				   week is week one. */				 				int week = MON_WEEK(t);				if (((t->tm_yday + 7 - (t->tm_wday + 1)) % 7) >= 4) {					week++;				} else if (week == 0) {					week = 53;				}				if (!_conv(week, 2, '0'))					return(0);				continue;				}			case 'W':				if (!_conv(MON_WEEK(t), 2, '0'))					return(0);				continue;			case 'w':				if (!_conv(t->tm_wday, 1, '0'))					return(0);				continue;			case 'x':				if (!_fmt(_CurrentTimeLocale->d_fmt, t))					return(0);				continue;			case 'X':				if (!_fmt(_CurrentTimeLocale->t_fmt, t))					return(0);				continue;			case 'y':				if (!_conv((t->tm_year + TM_YEAR_BASE) % 100,				    2, '0'))					return(0);				continue;			case 'Y':				if (!_conv((t->tm_year + TM_YEAR_BASE), 4, '0'))					return(0);				continue;			case 'Z':				if (t->tm_zone && !_add(t->tm_zone))					return(0);				continue;			case '%':			/*			 * X311J/88-090 (4.12.3.5): if conversion char is			 * undefined, behavior is undefined.  Print out the			 * character itself as printf(3) does.			 */			default:				break;			}		}		if (!gsize--)			return(0);		*pt++ = *format;	}	return(gsize);}