root / prex-0.9.0 / usr / lib / libc / time / gmtime_r.c @ 03e9c04a
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/*
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* Copyright (c) 2005, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/time.h> |
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#include <tzfile.h> |
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static const int daysinmonth[] = |
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{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; |
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static int |
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is_leap(int year)
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{ |
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return (isleap(year) ? 1 : 0); |
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} |
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struct tm *
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gmtime_r(const time_t *timep, struct tm *tmp) |
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{ |
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time_t t; |
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int days, year, mon;
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int i;
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t = *timep; |
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days = t / 60 / 60 / 24; |
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for (year = 1970, i = DAYSPERNYEAR + is_leap(year); |
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days >= i; |
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year++, i = DAYSPERNYEAR + is_leap(year)) |
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days -= i; |
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tmp->tm_year = year - 1900;
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tmp->tm_yday = days; |
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for (mon = 0; ; mon++) { |
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i = daysinmonth[mon]; |
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if (mon == 1 && is_leap(year)) |
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i++; |
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if (days < i)
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break;
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days -= i; |
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} |
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tmp->tm_mon = mon; |
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tmp->tm_mday = days + 1;
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tmp->tm_wday = (int) ((1970 + days) % DAYSPERWEEK); |
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tmp->tm_sec = t % 60;
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tmp->tm_min = (t / 60) % 60; |
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tmp->tm_hour = (t / 60 / 60) % 24; |
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tmp->tm_isdst = 0;
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return tmp;
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} |