2 * Copyright (c) 2008 Christos Zoulas
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
30 FILE_RCSID("@(#)$File: cdf_time.c,v 1.8 2009/06/20 20:47:30 christos Exp $")
41 #define isleap(y) ((((y) % 4) == 0) && \
42 ((((y) % 100) != 0) || (((y) % 400) == 0)))
44 static const int mdays[] = {
45 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
49 #define timespec timeval
50 #define tv_nsec tv_usec
55 * Return the number of days between jan 01 1601 and jan 01 of year.
63 for (y = CDF_BASE_YEAR; y < year; y++)
64 days += isleap(y) + 365;
70 * Return the day within the month
73 cdf_getday(int year, int days)
77 for (m = 0; m < sizeof(mdays) / sizeof(mdays[0]); m++) {
78 int sub = mdays[m] + (m == 1 && isleap(year));
87 * Return the 0...11 month number.
90 cdf_getmonth(int year, int days)
94 for (m = 0; m < sizeof(mdays) / sizeof(mdays[0]); m++) {
96 if (m == 1 && isleap(year))
105 cdf_timestamp_to_timespec(struct timespec *ts, cdf_timestamp_t t)
108 #ifdef HAVE_STRUCT_TM_TM_ZONE
109 static char UTC[] = "UTC";
113 /* Unit is 100's of nanoseconds */
114 ts->tv_nsec = (t % CDF_TIME_PREC) * 100;
117 tm.tm_sec = (int)(t % 60);
120 tm.tm_min = (int)(t % 60);
123 tm.tm_hour = (int)(t % 24);
127 tm.tm_year = (int)(CDF_BASE_YEAR + (t / 365));
129 rdays = cdf_getdays(tm.tm_year);
131 tm.tm_mday = cdf_getday(tm.tm_year, (int)t);
132 tm.tm_mon = cdf_getmonth(tm.tm_year, (int)t);
136 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
139 #ifdef HAVE_STRUCT_TM_TM_ZONE
143 ts->tv_sec = mktime(&tm);
144 if (ts->tv_sec == -1) {
153 cdf_timespec_to_timestamp(cdf_timestamp_t *t, const struct timespec *ts)
161 if (gmtime_r(&ts->ts_sec, &tm) == NULL) {
165 *t = (ts->ts_nsec / 100) * CDF_TIME_PREC;
167 *t += tm.tm_min * 60;
168 *t += tm.tm_hour * 60 * 60;
169 *t += tm.tm_mday * 60 * 60 * 24;
177 main(int argc, char *argv[])
180 static const cdf_timestamp_t tst = 0x01A5E403C2D59C00ULL;
181 static const char *ref = "Sat Apr 23 01:30:00 1977";
184 cdf_timestamp_to_timespec(&ts, tst);
185 p = ctime(&ts.tv_sec);
186 if ((q = strchr(p, '\n')) != NULL)
188 if (strcmp(ref, p) != 0)
189 errx(1, "Error date %s != %s\n", ref, p);