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Annotation of prex-old/usr/lib/libc/time/gmtime_r.c, Revision 1.1.1.1

1.1       nbrk        1: /*
                      2:  * Copyright (c) 2005, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      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.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: #include <sys/time.h>
                     31: #include <tzfile.h>
                     32:
                     33: static const int daysinmonth[] =
                     34:     { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
                     35:
                     36: static int
                     37: is_leap(int year)
                     38: {
                     39:        return (isleap(year) ? 1 : 0);
                     40: }
                     41:
                     42: struct tm *
                     43: gmtime_r(const time_t *timep, struct tm *tmp)
                     44: {
                     45:        time_t t;
                     46:        int days, year, mon;
                     47:        int i;
                     48:
                     49:        t = *timep;
                     50:        days = t / 60 / 60 / 24;
                     51:
                     52:        for (year = 1970, i = DAYSPERNYEAR + is_leap(year);
                     53:             days >= i;
                     54:             year++, i = DAYSPERNYEAR + is_leap(year))
                     55:                days -= i;
                     56:
                     57:        tmp->tm_year = year - 1900;
                     58:        tmp->tm_yday = days;
                     59:
                     60:        for (mon = 0; ; mon++) {
                     61:                i = daysinmonth[mon];
                     62:                if (mon == 1 && is_leap(year))
                     63:                        i++;
                     64:                if (days < i)
                     65:                        break;
                     66:                days -= i;
                     67:        }
                     68:        tmp->tm_mon = mon;
                     69:        tmp->tm_mday = days + 1;
                     70:        tmp->tm_wday = (int) ((1970 + days) % DAYSPERWEEK);
                     71:
                     72:        tmp->tm_sec = t % 60;
                     73:        tmp->tm_min = (t / 60) % 60;
                     74:        tmp->tm_hour = (t / 60 / 60) % 24;
                     75:        tmp->tm_isdst = 0;
                     76:        return tmp;
                     77: }