Function strftime

strftime.c:184–213

#endif

size_t
strftime(char *restrict s, size_t maxsize, char const *restrict format,
	 struct tm const *restrict t)
{
	char *	p;
	int saved_errno = errno;
	enum warn warn = IN_NONE;

	tzset();
	p = _fmt(format, t, s, s + maxsize, &warn);
	if (DEPRECATE_TWO_DIGIT_YEARS
	    && warn != IN_NONE && getenv(YEAR_2000_NAME)) {
		fprintf(stderr, "\n");
		fprintf(stderr, "strftime format \"%s\" ", format);
		fprintf(stderr, "yields only two digits of years in ");
		if (warn == IN_SOME)
			fprintf(stderr, "some locales");
		else if (warn == IN_THIS)
			fprintf(stderr, "the current locale");
		else	fprintf(stderr, "all locales");
		fprintf(stderr, "\n");
	}
	if (p == s + maxsize) {
		errno = ERANGE;
		return 0;
	}
	*p = '\0';
	errno = saved_errno;
	return p - s;
}

static char *
_fmt(const char *format, const struct tm *t, char *pt,