122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
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/*****************************************************************************
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*
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* $Id: filetime.c,v 1.5 2004/02/21 17:22:01 mbroek Exp $
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* Purpose ...............: Fidonet mailer
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*
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*****************************************************************************
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* Copyright (C) 1997-2004
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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#include "../config.h"
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#include "../lib/mbselib.h"
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#include "filetime.h"
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time_t gmtoff(time_t);
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time_t gmtoff(time_t tt)
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{
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struct tm lt;
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#ifndef HAVE_TM_GMTOFF
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struct tm gt;
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time_t offset;
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lt = *localtime(&tt);
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gt = *gmtime(&tt);
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offset = gt.tm_yday - lt.tm_yday;
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if (offset > 1)
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offset =- 24;
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else
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if (offset < -1)
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offset = 24;
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else
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offset *= 24;
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offset += gt.tm_hour - lt.tm_hour;
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offset *= 60;
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offset += gt.tm_min - lt.tm_min;
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offset *= 60;
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offset += gt.tm_sec - lt.tm_sec;
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return offset;
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#else
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lt = *localtime(&tt);
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return -lt.tm_gmtoff;
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#endif
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}
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/*
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* SEAlink time conversion
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* FIXME: I think there is one year difference, spec starts at 1 jan 1979, mtime starts at 1 jan 1980
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*/
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time_t mtime2sl(time_t tt)
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{
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return tt - gmtoff(tt);
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}
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time_t sl2mtime(time_t tt)
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{
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return tt + gmtoff(tt);
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}
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/*
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* Telink time conversion
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*/
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time_t mtime2tl(time_t tt)
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{
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time_t tlt=0L;
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struct tm *tm;
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tm=localtime(&tt);
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tlt |= ((tm->tm_year)-1980) << 25;
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tlt |= (tm->tm_mon) << 21;
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tlt |= (tm->tm_mday) << 16;
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tlt |= (tm->tm_hour) << 11;
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tlt |= (tm->tm_min) << 5;
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tlt |= (tm->tm_sec) >> 1;
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return tlt;
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}
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time_t tl2mtime(time_t tt)
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{
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struct tm tm;
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tm.tm_year = ((tt >> 25) & 0x7f) + 1980;
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tm.tm_mon = (tt >> 21) & 0x0f;
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tm.tm_mday = (tt >> 16) & 0x1f;
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tm.tm_hour = (tt >> 11) & 0x1f;
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tm.tm_min = (tt >> 5 ) & 0x3f;
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tm.tm_sec = ((tt ) & 0x1f) * 2;
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return mktime(&tm);
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}
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