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git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14685 87f5fb63-7c3d-0410-a384-fd976d0f7a62
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Olaf Barthel
2004-07-26 16:36:55 +00:00
parent a9e8f137ad
commit 91bcdea2a2
669 changed files with 80825 additions and 0 deletions
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library/time_converttime.c Normal file
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/*
* $Id: time_converttime.c,v 1.1.1.1 2004-07-26 16:32:22 obarthel Exp $
*
* :ts=4
*
* Portable ISO 'C' (1994) runtime library for the Amiga computer
* Copyright (c) 2002-2004 by Olaf Barthel <olsen@sourcery.han.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Neither the name of Olaf Barthel nor the names of contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _TIME_HEADERS_H
#include "time_headers.h"
#endif /* _TIME_HEADERS_H */
/****************************************************************************/
struct tm *
__convert_time(ULONG seconds, LONG gmt_offset, struct tm * tm)
{
DECLARE_UTILITYBASE();
struct ClockData clock_data;
struct tm * result;
ULONG delta;
ENTER();
assert( UtilityBase != NULL );
/* We need to convert the time from Unix-style UTC
* back into Amiga style local time.
*
* First, the Unix time offset will have to go.
*/
if(seconds < UNIX_TIME_OFFSET)
seconds = 0;
else
seconds -= UNIX_TIME_OFFSET;
/* Now the local time offset will have to go. */
seconds -= gmt_offset;
Amiga2Date(seconds, &clock_data);
tm->tm_sec = clock_data.sec;
tm->tm_min = clock_data.min;
tm->tm_hour = clock_data.hour;
tm->tm_mday = clock_data.mday;
tm->tm_mon = clock_data.month - 1;
tm->tm_year = clock_data.year - 1900;
tm->tm_wday = clock_data.wday;
tm->tm_isdst = -1;
clock_data.mday = 1;
clock_data.month = 1;
delta = Date2Amiga(&clock_data);
tm->tm_yday = (seconds - delta) / (24 * 60 * 60);
result = tm;
RETURN(result);
return(result);
}