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