17c478bd9Sstevel@tonic-gate /*
2*d67944fbSScott Rotondo * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
37c478bd9Sstevel@tonic-gate * Use is subject to license terms.
47c478bd9Sstevel@tonic-gate */
57c478bd9Sstevel@tonic-gate
67c478bd9Sstevel@tonic-gate /*
77c478bd9Sstevel@tonic-gate * Copyright (c) 1980 Regents of the University of California.
87c478bd9Sstevel@tonic-gate * All rights reserved. The Berkeley software License Agreement
97c478bd9Sstevel@tonic-gate * specifies the terms and conditions for redistribution.
107c478bd9Sstevel@tonic-gate */
117c478bd9Sstevel@tonic-gate
127c478bd9Sstevel@tonic-gate /*
137c478bd9Sstevel@tonic-gate * This localtime is a modified version of offtime from libc, which does not
147c478bd9Sstevel@tonic-gate * bother to figure out the time zone from the kernel, from environment
157c478bd9Sstevel@tonic-gate * variables, or from Unix files.
167c478bd9Sstevel@tonic-gate */
177c478bd9Sstevel@tonic-gate
187c478bd9Sstevel@tonic-gate #include <sys/types.h>
197c478bd9Sstevel@tonic-gate #include <sys/salib.h>
207c478bd9Sstevel@tonic-gate #include <tzfile.h>
217c478bd9Sstevel@tonic-gate #include <errno.h>
227c478bd9Sstevel@tonic-gate
237c478bd9Sstevel@tonic-gate static int mon_lengths[2][MONS_PER_YEAR] = {
247c478bd9Sstevel@tonic-gate 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
257c478bd9Sstevel@tonic-gate 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
267c478bd9Sstevel@tonic-gate };
277c478bd9Sstevel@tonic-gate
287c478bd9Sstevel@tonic-gate static int year_lengths[2] = {
297c478bd9Sstevel@tonic-gate DAYS_PER_NYEAR, DAYS_PER_LYEAR
307c478bd9Sstevel@tonic-gate };
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate struct tm *
localtime(const time_t * clock)337c478bd9Sstevel@tonic-gate localtime(const time_t *clock)
347c478bd9Sstevel@tonic-gate {
357c478bd9Sstevel@tonic-gate struct tm *tmp;
367c478bd9Sstevel@tonic-gate long days;
377c478bd9Sstevel@tonic-gate long rem;
387c478bd9Sstevel@tonic-gate int y;
397c478bd9Sstevel@tonic-gate int yleap;
407c478bd9Sstevel@tonic-gate int *ip;
417c478bd9Sstevel@tonic-gate static struct tm tm;
427c478bd9Sstevel@tonic-gate
437c478bd9Sstevel@tonic-gate tmp = &tm;
447c478bd9Sstevel@tonic-gate days = *clock / SECS_PER_DAY;
457c478bd9Sstevel@tonic-gate rem = *clock % SECS_PER_DAY;
467c478bd9Sstevel@tonic-gate while (rem < 0) {
477c478bd9Sstevel@tonic-gate rem += SECS_PER_DAY;
487c478bd9Sstevel@tonic-gate --days;
497c478bd9Sstevel@tonic-gate }
507c478bd9Sstevel@tonic-gate while (rem >= SECS_PER_DAY) {
517c478bd9Sstevel@tonic-gate rem -= SECS_PER_DAY;
527c478bd9Sstevel@tonic-gate ++days;
537c478bd9Sstevel@tonic-gate }
547c478bd9Sstevel@tonic-gate tmp->tm_hour = (int)(rem / SECS_PER_HOUR);
557c478bd9Sstevel@tonic-gate rem = rem % SECS_PER_HOUR;
567c478bd9Sstevel@tonic-gate tmp->tm_min = (int)(rem / SECS_PER_MIN);
577c478bd9Sstevel@tonic-gate tmp->tm_sec = (int)(rem % SECS_PER_MIN);
587c478bd9Sstevel@tonic-gate tmp->tm_wday = (int)((EPOCH_WDAY + days) % DAYS_PER_WEEK);
597c478bd9Sstevel@tonic-gate if (tmp->tm_wday < 0)
607c478bd9Sstevel@tonic-gate tmp->tm_wday += DAYS_PER_WEEK;
617c478bd9Sstevel@tonic-gate y = EPOCH_YEAR;
627c478bd9Sstevel@tonic-gate if (days >= 0) {
637c478bd9Sstevel@tonic-gate for (;;) {
647c478bd9Sstevel@tonic-gate yleap = isleap(y);
657c478bd9Sstevel@tonic-gate if (days < (long)year_lengths[yleap])
667c478bd9Sstevel@tonic-gate break;
677c478bd9Sstevel@tonic-gate if (++y > 9999) {
687c478bd9Sstevel@tonic-gate errno = EOVERFLOW;
697c478bd9Sstevel@tonic-gate return (NULL);
707c478bd9Sstevel@tonic-gate }
717c478bd9Sstevel@tonic-gate days = days - (long)year_lengths[yleap];
727c478bd9Sstevel@tonic-gate }
737c478bd9Sstevel@tonic-gate } else {
747c478bd9Sstevel@tonic-gate do {
757c478bd9Sstevel@tonic-gate if (--y < 0) {
767c478bd9Sstevel@tonic-gate errno = EOVERFLOW;
777c478bd9Sstevel@tonic-gate return (NULL);
787c478bd9Sstevel@tonic-gate }
797c478bd9Sstevel@tonic-gate yleap = isleap(y);
807c478bd9Sstevel@tonic-gate days = days + (long)year_lengths[yleap];
817c478bd9Sstevel@tonic-gate } while (days < 0);
827c478bd9Sstevel@tonic-gate }
837c478bd9Sstevel@tonic-gate tmp->tm_year = y - TM_YEAR_BASE;
847c478bd9Sstevel@tonic-gate tmp->tm_yday = (int)days;
857c478bd9Sstevel@tonic-gate ip = mon_lengths[yleap];
867c478bd9Sstevel@tonic-gate for (tmp->tm_mon = 0; days >= (long)ip[tmp->tm_mon]; ++(tmp->tm_mon))
877c478bd9Sstevel@tonic-gate days = days - (long)ip[tmp->tm_mon];
887c478bd9Sstevel@tonic-gate tmp->tm_mday = (int)(days + 1);
897c478bd9Sstevel@tonic-gate tmp->tm_isdst = 0;
907c478bd9Sstevel@tonic-gate
917c478bd9Sstevel@tonic-gate return (tmp);
927c478bd9Sstevel@tonic-gate }
937c478bd9Sstevel@tonic-gate
947c478bd9Sstevel@tonic-gate /*
957c478bd9Sstevel@tonic-gate * So is ctime...
967c478bd9Sstevel@tonic-gate */
977c478bd9Sstevel@tonic-gate
987c478bd9Sstevel@tonic-gate /*
997c478bd9Sstevel@tonic-gate * This routine converts time as follows.
1007c478bd9Sstevel@tonic-gate * The epoch is 0000 Jan 1 1970 GMT.
1017c478bd9Sstevel@tonic-gate * The argument time is in seconds since then.
1027c478bd9Sstevel@tonic-gate * The localtime(t) entry returns a pointer to an array
1037c478bd9Sstevel@tonic-gate * containing
1047c478bd9Sstevel@tonic-gate * seconds (0-59)
1057c478bd9Sstevel@tonic-gate * minutes (0-59)
1067c478bd9Sstevel@tonic-gate * hours (0-23)
1077c478bd9Sstevel@tonic-gate * day of month (1-31)
1087c478bd9Sstevel@tonic-gate * month (0-11)
1097c478bd9Sstevel@tonic-gate * year-1970
1107c478bd9Sstevel@tonic-gate * weekday (0-6, Sun is 0)
1117c478bd9Sstevel@tonic-gate * day of the year
1127c478bd9Sstevel@tonic-gate * daylight savings flag
1137c478bd9Sstevel@tonic-gate *
1147c478bd9Sstevel@tonic-gate * The routine corrects for daylight saving
1157c478bd9Sstevel@tonic-gate * time and will work in any time zone provided
1167c478bd9Sstevel@tonic-gate * "timezone" is adjusted to the difference between
1177c478bd9Sstevel@tonic-gate * Greenwich and local standard time (measured in seconds).
1187c478bd9Sstevel@tonic-gate * In places like Michigan "daylight" must
1197c478bd9Sstevel@tonic-gate * be initialized to 0 to prevent the conversion
1207c478bd9Sstevel@tonic-gate * to daylight time.
1217c478bd9Sstevel@tonic-gate * There is a table which accounts for the peculiarities
1227c478bd9Sstevel@tonic-gate * undergone by daylight time in 1974-1975.
1237c478bd9Sstevel@tonic-gate *
1247c478bd9Sstevel@tonic-gate * The routine does not work
1257c478bd9Sstevel@tonic-gate * in Saudi Arabia which runs on Solar time.
1267c478bd9Sstevel@tonic-gate *
1277c478bd9Sstevel@tonic-gate * asctime(tvec)
1287c478bd9Sstevel@tonic-gate * where tvec is produced by localtime
1297c478bd9Sstevel@tonic-gate * returns a ptr to a character string
1307c478bd9Sstevel@tonic-gate * that has the ascii time in the form
1317c478bd9Sstevel@tonic-gate * Thu Jan 01 00:00:00 1970\n\0
1327c478bd9Sstevel@tonic-gate * 01234567890123456789012345
1337c478bd9Sstevel@tonic-gate * 0 1 2
1347c478bd9Sstevel@tonic-gate *
1357c478bd9Sstevel@tonic-gate * ctime(t) just calls localtime, then asctime.
1367c478bd9Sstevel@tonic-gate *
1377c478bd9Sstevel@tonic-gate * tzset() looks for an environment variable named
1387c478bd9Sstevel@tonic-gate * TZ.
1397c478bd9Sstevel@tonic-gate * If the variable is present, it will set the external
1407c478bd9Sstevel@tonic-gate * variables "timezone", "altzone", "daylight", and "tzname"
1417c478bd9Sstevel@tonic-gate * appropriately. It is called by localtime, and
1427c478bd9Sstevel@tonic-gate * may also be called explicitly by the user.
1437c478bd9Sstevel@tonic-gate */
1447c478bd9Sstevel@tonic-gate
1457c478bd9Sstevel@tonic-gate
1467c478bd9Sstevel@tonic-gate
1477c478bd9Sstevel@tonic-gate #define dysize(A) (((A)%4)? 365: 366)
1487c478bd9Sstevel@tonic-gate #define CBUFSIZ 26
1497c478bd9Sstevel@tonic-gate
150*d67944fbSScott Rotondo static char *ct_numb();
151*d67944fbSScott Rotondo
1527c478bd9Sstevel@tonic-gate /*
1537c478bd9Sstevel@tonic-gate * POSIX.1c standard version of the function asctime_r.
1547c478bd9Sstevel@tonic-gate * User gets it via static asctime_r from the header file.
1557c478bd9Sstevel@tonic-gate */
1567c478bd9Sstevel@tonic-gate char *
__posix_asctime_r(const struct tm * t,char * cbuf)1577c478bd9Sstevel@tonic-gate __posix_asctime_r(const struct tm *t, char *cbuf)
1587c478bd9Sstevel@tonic-gate {
1597c478bd9Sstevel@tonic-gate const char *Date = "Day Mon 00 00:00:00 1900\n";
1607c478bd9Sstevel@tonic-gate const char *Day = "SunMonTueWedThuFriSat";
1617c478bd9Sstevel@tonic-gate const char *Month = "JanFebMarAprMayJunJulAugSepOctNovDec";
1627c478bd9Sstevel@tonic-gate const char *ncp;
1637c478bd9Sstevel@tonic-gate const int *tp;
1647c478bd9Sstevel@tonic-gate char *cp;
1657c478bd9Sstevel@tonic-gate
1667c478bd9Sstevel@tonic-gate if (t == NULL)
1677c478bd9Sstevel@tonic-gate return (NULL);
1687c478bd9Sstevel@tonic-gate
1697c478bd9Sstevel@tonic-gate cp = cbuf;
1707257d1b4Sraf for (ncp = Date; *cp++ = *ncp++; /* */)
1717257d1b4Sraf ;
1727c478bd9Sstevel@tonic-gate ncp = Day + (3*t->tm_wday);
1737c478bd9Sstevel@tonic-gate cp = cbuf;
1747c478bd9Sstevel@tonic-gate *cp++ = *ncp++;
1757c478bd9Sstevel@tonic-gate *cp++ = *ncp++;
1767c478bd9Sstevel@tonic-gate *cp++ = *ncp++;
1777c478bd9Sstevel@tonic-gate cp++;
1787c478bd9Sstevel@tonic-gate tp = &t->tm_mon;
1797c478bd9Sstevel@tonic-gate ncp = Month + ((*tp) * 3);
1807c478bd9Sstevel@tonic-gate *cp++ = *ncp++;
1817c478bd9Sstevel@tonic-gate *cp++ = *ncp++;
1827c478bd9Sstevel@tonic-gate *cp++ = *ncp++;
1837c478bd9Sstevel@tonic-gate cp = ct_numb(cp, *--tp);
1847c478bd9Sstevel@tonic-gate cp = ct_numb(cp, *--tp+100);
1857c478bd9Sstevel@tonic-gate cp = ct_numb(cp, *--tp+100);
1867c478bd9Sstevel@tonic-gate cp = ct_numb(cp, *--tp+100);
1877c478bd9Sstevel@tonic-gate if (t->tm_year > 9999) {
1887c478bd9Sstevel@tonic-gate errno = EOVERFLOW;
1897c478bd9Sstevel@tonic-gate return (NULL);
1907c478bd9Sstevel@tonic-gate } else {
1917c478bd9Sstevel@tonic-gate uint_t hun = 19 + (t->tm_year / 100);
1927c478bd9Sstevel@tonic-gate cp[1] = (hun / 10) + '0';
1937c478bd9Sstevel@tonic-gate cp[2] = (hun % 10) + '0';
1947c478bd9Sstevel@tonic-gate }
1957c478bd9Sstevel@tonic-gate cp += 2;
1967c478bd9Sstevel@tonic-gate cp = ct_numb(cp, t->tm_year+100);
1977c478bd9Sstevel@tonic-gate return (cbuf);
1987c478bd9Sstevel@tonic-gate }
1997c478bd9Sstevel@tonic-gate
2007c478bd9Sstevel@tonic-gate /*
2017c478bd9Sstevel@tonic-gate * POSIX.1c Draft-6 version of the function asctime_r.
2027c478bd9Sstevel@tonic-gate * It was implemented by Solaris 2.3.
2037c478bd9Sstevel@tonic-gate */
2047c478bd9Sstevel@tonic-gate char *
asctime_r(const struct tm * t,char * cbuf,int buflen)2057257d1b4Sraf asctime_r(const struct tm *t, char *cbuf, int buflen)
2067c478bd9Sstevel@tonic-gate {
2077c478bd9Sstevel@tonic-gate if (buflen < CBUFSIZ) {
2087c478bd9Sstevel@tonic-gate errno = ERANGE;
2097c478bd9Sstevel@tonic-gate return (NULL);
2107c478bd9Sstevel@tonic-gate }
2117c478bd9Sstevel@tonic-gate return (__posix_asctime_r(t, cbuf));
2127c478bd9Sstevel@tonic-gate }
2137c478bd9Sstevel@tonic-gate
2147c478bd9Sstevel@tonic-gate char *
ctime(const time_t * t)2157c478bd9Sstevel@tonic-gate ctime(const time_t *t)
2167c478bd9Sstevel@tonic-gate {
2177c478bd9Sstevel@tonic-gate return (asctime(localtime(t)));
2187c478bd9Sstevel@tonic-gate }
2197c478bd9Sstevel@tonic-gate
2207c478bd9Sstevel@tonic-gate
2217c478bd9Sstevel@tonic-gate char *
asctime(const struct tm * t)2227c478bd9Sstevel@tonic-gate asctime(const struct tm *t)
2237c478bd9Sstevel@tonic-gate {
2247c478bd9Sstevel@tonic-gate static char cbuf[CBUFSIZ];
2257c478bd9Sstevel@tonic-gate
2267257d1b4Sraf return (asctime_r(t, cbuf, CBUFSIZ));
2277c478bd9Sstevel@tonic-gate }
2287c478bd9Sstevel@tonic-gate
2297c478bd9Sstevel@tonic-gate
2307c478bd9Sstevel@tonic-gate static char *
ct_numb(char * cp,int n)2317c478bd9Sstevel@tonic-gate ct_numb(char *cp, int n)
2327c478bd9Sstevel@tonic-gate {
2337c478bd9Sstevel@tonic-gate cp++;
2347c478bd9Sstevel@tonic-gate if (n >= 10)
2357c478bd9Sstevel@tonic-gate *cp++ = (n/10)%10 + '0';
2367c478bd9Sstevel@tonic-gate else
2377c478bd9Sstevel@tonic-gate *cp++ = ' '; /* Pad with blanks */
2387c478bd9Sstevel@tonic-gate *cp++ = n%10 + '0';
2397c478bd9Sstevel@tonic-gate return (cp);
2407c478bd9Sstevel@tonic-gate }
241