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deb-mbse/mbcico/filetime.c

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2009-05-15 20:01:56 +00:00
/*****************************************************************************
*
* $Id: filetime.c,v 1.5 2004/02/21 17:22:01 mbroek Exp $
* Purpose ...............: Fidonet mailer
*
*****************************************************************************
* Copyright (C) 1997-2004
*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS 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, or (at your option) any
* later version.
*
* MBSE BBS 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 MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*****************************************************************************/
#include "../config.h"
#include "../lib/mbselib.h"
#include "filetime.h"
time_t gmtoff(time_t);
time_t gmtoff(time_t tt)
{
struct tm lt;
#ifndef HAVE_TM_GMTOFF
struct tm gt;
time_t offset;
lt = *localtime(&tt);
gt = *gmtime(&tt);
offset = gt.tm_yday - lt.tm_yday;
if (offset > 1)
offset =- 24;
else
if (offset < -1)
offset = 24;
else
offset *= 24;
offset += gt.tm_hour - lt.tm_hour;
offset *= 60;
offset += gt.tm_min - lt.tm_min;
offset *= 60;
offset += gt.tm_sec - lt.tm_sec;
return offset;
#else
lt = *localtime(&tt);
return -lt.tm_gmtoff;
#endif
}
/*
* SEAlink time conversion
* FIXME: I think there is one year difference, spec starts at 1 jan 1979, mtime starts at 1 jan 1980
*/
time_t mtime2sl(time_t tt)
{
return tt - gmtoff(tt);
}
time_t sl2mtime(time_t tt)
{
return tt + gmtoff(tt);
}
/*
* Telink time conversion
*/
time_t mtime2tl(time_t tt)
{
time_t tlt=0L;
struct tm *tm;
tm=localtime(&tt);
tlt |= ((tm->tm_year)-1980) << 25;
tlt |= (tm->tm_mon) << 21;
tlt |= (tm->tm_mday) << 16;
tlt |= (tm->tm_hour) << 11;
tlt |= (tm->tm_min) << 5;
tlt |= (tm->tm_sec) >> 1;
return tlt;
}
time_t tl2mtime(time_t tt)
{
struct tm tm;
tm.tm_year = ((tt >> 25) & 0x7f) + 1980;
tm.tm_mon = (tt >> 21) & 0x0f;
tm.tm_mday = (tt >> 16) & 0x1f;
tm.tm_hour = (tt >> 11) & 0x1f;
tm.tm_min = (tt >> 5 ) & 0x3f;
tm.tm_sec = ((tt ) & 0x1f) * 2;
return mktime(&tm);
}