X-Git-Url: http://git.madism.org/?p=apps%2Fmadmutt.git;a=blobdiff_plain;f=lib-lib%2Fdate.c;fp=lib-lib%2Fdate.c;h=0000000000000000000000000000000000000000;hp=8fa90c617e1541544e1b48cd352588cf704bdaad;hb=11ebd35cdf53f877efb11ed1ce9ccb771d2a091c;hpb=7fa3478438501dbc2000dd65675b2c4bb8565190;ds=sidebyside diff --git a/lib-lib/date.c b/lib-lib/date.c deleted file mode 100644 index 8fa90c6..0000000 --- a/lib-lib/date.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301, USA. - * - * Copyright © 2006 Pierre Habouzit - */ - -/* - * Copyright notice from original mutt: - * Copyright (C) 1996-2000 Michael R. Elkins - * - * This file is part of mutt-ng, see http://www.muttng.org/. - * It's licensed under the GNU General Public License, - * please see the file GPL in the top level source directory. - */ - -#include "lib-lib.h" - -/* returns the seconds east of UTC given `g' and its corresponding gmtime() - representation */ -static time_t compute_tz(time_t g, struct tm *utc) -{ - struct tm *lt = localtime (&g); - time_t t; - int yday; - - t = (lt->tm_hour - utc->tm_hour) * 3600 - + (lt->tm_min - utc->tm_min) * 60; - yday = (lt->tm_yday - utc->tm_yday); - - if (yday) { - /* This code is optimized to negative timezones (West of Greenwich) */ - if (yday == -1 || /* UTC passed midnight before localtime */ - yday > 1) /* UTC passed new year before localtime */ - t -= 24 * 60 * 60; - else - t += 24 * 60 * 60; - } - - return t; -} - -/* Returns the local timezone in seconds east of UTC for the time t, - or for the current time if t is zero. */ -time_t mutt_local_tz(time_t t) -{ - struct tm *ptm; - struct tm utc; - - if (!t) - t = time(NULL); - - /* need to make a copy because gmtime/localtime return a pointer to - static memory (grr!) */ - ptm = gmtime(&t); - utc = *ptm; - return compute_tz(t, &utc); -} - -/* converts struct tm to time_t, but does not take the local timezone into - account unless ``local'' is nonzero */ -time_t mutt_mktime(struct tm *t, int local) -{ - static short const AccumDaysPerMonth[12] = { - 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 - }; - - time_t g; - - /* Compute the number of days since January 1 in the same year */ - g = AccumDaysPerMonth[t->tm_mon % 12]; - - /* The leap years are 1972 and every 4. year until 2096, - * but this algoritm will fail after year 2099 */ - g += t->tm_mday; - if ((t->tm_year % 4) || t->tm_mon < 2) - g--; - t->tm_yday = g; - - /* Compute the number of days since January 1, 1970 */ - g += (t->tm_year - 70) * 365; - g += (t->tm_year - 69) / 4; - - /* Compute the number of hours */ - g *= 24; - g += t->tm_hour; - - /* Compute the number of minutes */ - g *= 60; - g += t->tm_min; - - /* Compute the number of seconds */ - g *= 60; - g += t->tm_sec; - - if (local) - g -= compute_tz(g, t); - - return g; -} - -/* Return 1 if month is February of leap year, else 0 */ -__attribute__((const)) -static int isLeapYearFeb(int m, int y) -{ - return (m == 1) /* february ? */ - && !(y & 3) /* multiple of 4 ? */ - && ((y % 100) || !((y + 1900) % 400)); - /* !multiple of 100, or multiple of 400 */ -} - -__attribute__((const)) -static inline int nbDaysInMonth(int m, int y) -{ - static char const DaysPerMonth[12] = { - 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 - }; - - return DaysPerMonth[m] + isLeapYearFeb(m, y); -} - -void mutt_normalize_time(struct tm *tm) -{ - while (tm->tm_sec < 0) { - tm->tm_sec += 60; - tm->tm_min--; - } - while (tm->tm_sec >= 60) { - tm->tm_sec -= 60; - tm->tm_min++; - } - while (tm->tm_min < 0) { - tm->tm_min += 60; - tm->tm_hour--; - } - while (tm->tm_min >= 60) { - tm->tm_min -= 60; - tm->tm_hour++; - } - while (tm->tm_hour < 0) { - tm->tm_hour += 24; - tm->tm_mday--; - } - while (tm->tm_hour >= 24) { - tm->tm_hour -= 24; - tm->tm_mday++; - } - /* use loops on NNNdwmy user input values? */ - while (tm->tm_mon < 0) { - tm->tm_mon += 12; - tm->tm_year--; - } - while (tm->tm_mon >= 12) { - tm->tm_mon -= 12; - tm->tm_year++; - } - while (tm->tm_mday <= 0) { - if (tm->tm_mon) { - tm->tm_mon--; - } else { - tm->tm_mon = 11; - tm->tm_year--; - } - tm->tm_mday += nbDaysInMonth(tm->tm_mon, tm->tm_year); - } - - while (tm->tm_mday > nbDaysInMonth(tm->tm_mon, tm->tm_year)) { - tm->tm_mday -= nbDaysInMonth(tm->tm_mon, tm->tm_year); - if (tm->tm_mon < 11) { - tm->tm_mon++; - } else { - tm->tm_mon = 0; - tm->tm_year++; - } - } -}