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📄 Makefile.am(3.27 KB)
📄 Makefile.in(105.83 KB)
📄 README(272 B)
📄 a_md5encrypt.c(6.76 KB)
📄 adjtime.c(10.29 KB)
📄 adjtimex.c(334 B)
📄 atoint.c(801 B)
📄 atolfp.c(1.88 KB)
📄 atouint.c(885 B)
📄 audio.c(13.09 KB)
📄 authkeys.c(19.92 KB)
📄 authreadkeys.c(9.06 KB)
📄 authusekey.c(748 B)
📄 bsd_strerror.c(1.35 KB)
📄 buftvtots.c(643 B)
📄 caljulian.c(891 B)
📄 caltontp.c(2.25 KB)
📄 calyearstart.c(2.1 KB)
📄 clocktime.c(4.49 KB)
📄 clocktypes.c(3.69 KB)
📄 decodenetnum.c(3.93 KB)
📄 dofptoa.c(2.19 KB)
📄 dolfptoa.c(3.14 KB)
📄 emalloc.c(3.4 KB)
📄 findconfig.c(1.46 KB)
📄 getopt.c(2.21 KB)
📄 hextoint.c(673 B)
📄 hextolfp.c(1.35 KB)
📄 humandate.c(1.1 KB)
📄 icom.c(4.22 KB)
📄 iosignal.c(12.27 KB)
📄 is_ip_address.c(2.02 KB)
📄 lib_strbuf.c(633 B)
📄 libssl_compat.c(6.13 KB)
📄 machines.c(13.05 KB)
📄 mktime.c(8.29 KB)
📄 modetoa.c(507 B)
📄 mstolfp.c(2.01 KB)
📄 msyslog.c(12.67 KB)
📄 netof.c(1.17 KB)
📄 ntp_calendar.c(58.49 KB)
📄 ntp_calgps.c(15.73 KB)
📄 ntp_crypto_rnd.c(2.11 KB)
📄 ntp_intres.c(28.64 KB)
📄 ntp_libopts.c(1.27 KB)
📄 ntp_lineedit.c(3.88 KB)
📄 ntp_random.c(17.63 KB)
📄 ntp_rfc2553.c(14.85 KB)
📄 ntp_worker.c(7.21 KB)
📄 numtoa.c(963 B)
📄 numtohost.c(908 B)
📄 octtoint.c(578 B)
📄 prettydate.c(5.53 KB)
📄 recvbuff.c(7.3 KB)
📄 refidsmear.c(1.05 KB)
📄 refnumtoa.c(673 B)
📄 snprintf.c(52.56 KB)
📄 socket.c(4.88 KB)
📄 socktoa.c(2.88 KB)
📄 socktohost.c(2.54 KB)
📄 ssl_init.c(5.09 KB)
📄 statestr.c(11.4 KB)
📄 strdup.c(854 B)
📄 strl_obsd.c(3.65 KB)
📄 syssignal.c(2.69 KB)
📄 systime.c(17.51 KB)
📄 systime_s.c(33 B)
📄 timespecops.c(4.27 KB)
📄 timetoa.c(2.75 KB)
📄 timevalops.c(12.97 KB)
📄 timexsup.c(1.17 KB)
📄 uglydate.c(958 B)
📄 vint64ops.c(5.1 KB)
📄 work_fork.c(12.73 KB)
📄 work_thread.c(22.88 KB)
📄 xsbprintf.c(2.06 KB)
📄 ymd2yd.c(582 B)

Editing: timetoa.c

/*
 * timetoa.c -- time_t related string formatting
 *
 * Written by Juergen Perlinger (perlinger@ntp.org) for the NTP project.
 * The contents of 'html/copyright.html' apply.
 *
 * Printing a 'time_t' has a lot of portability pitfalls, due to it's
 * opaque base type. The only requirement imposed by the standard is
 * that it must be a numeric type. For all practical purposes it's a
 * signed int, and 32 bits are common.
 *
 * Since the UN*X time epoch will cause a signed integer overflow for
 * 32-bit signed int in the year 2038, implementations slowly move to
 * 64bit base types for time_t, even in 32-bit environments.
 *
 * As the printf() family has no standardised type specifier for time_t,
 * guessing the right output format specifier is a bit troublesome and
 * best done with the help of the preprocessor and "config.h".
 */

#include "config.h"

#include <math.h>
#include <stdio.h>

#include "timetoa.h"
#include "ntp_assert.h"
#include "lib_strbuf.h"

/*
 * Formatting to string needs at max 40 bytes (even with 64 bit time_t),
 * so we check LIB_BUFLENGTH is big enough for our purpose.
 */
#if LIB_BUFLENGTH < 40
# include "GRONK: LIB_BUFLENGTH is not sufficient"
#endif

/*
 * general fractional timestamp formatting
 *
 * Many pieces of ntpd require a machine with two's complement
 * representation of signed integers, so we don't go through the whole
 * rigamarole of creating fully portable code here. But we have to stay
 * away from signed integer overflow, as this might cause trouble even
 * with two's complement representation.
 */
const char *
format_time_fraction(
	time_t	secs,
	long	frac,
	int	prec
	)
{
	char *		cp;
	u_int		prec_u;
	u_time		secs_u;
	u_int		u;
	long		fraclimit;
	int		notneg;	/* flag for non-negative value	*/
	ldiv_t		qr;

DEBUG_REQUIRE(prec != 0);

LIB_GETBUF(cp);
	secs_u = (u_time)secs;
	
	/* check if we need signed or unsigned mode */
	notneg = (prec < 0);
	prec_u = abs(prec);
	/* fraclimit = (long)pow(10, prec_u); */
	for (fraclimit = 10, u = 1; u < prec_u; u++) {
		DEBUG_INSIST(fraclimit < fraclimit * 10);
		fraclimit *= 10;
	}

/*
	 * Since conversion to string uses lots of divisions anyway,
	 * there's no big extra penalty for normalisation. We do it for
	 * consistency.
	 */
	if (frac < 0 || frac >= fraclimit) {
		qr = ldiv(frac, fraclimit);
		if (qr.rem < 0) {
			qr.quot--;
			qr.rem += fraclimit;
		}
		secs_u += (time_t)qr.quot;
		frac = qr.rem;
	}

/* Get the absolute value of the split representation time. */
	notneg = notneg || ((time_t)secs_u >= 0);
	if (!notneg) {
		secs_u = ~secs_u;
		if (0 == frac)
			secs_u++;
		else
			frac = fraclimit - frac;
	}

/* finally format the data and return the result */
	snprintf(cp, LIB_BUFLENGTH, "%s%" UTIME_FORMAT ".%0*ld",
	    notneg? "" : "-", secs_u, prec_u, frac);
	
	return cp;
}

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Editing: timetoa.c

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