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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
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
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* $Id: time_converttime.c,v 1.1.1.1 2004-07-26 16:32:22 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2004 by Olaf Barthel <olsen@sourcery.han.de>
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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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*
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* - 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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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TIME_HEADERS_H
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#include "time_headers.h"
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#endif /* _TIME_HEADERS_H */
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/****************************************************************************/
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struct tm *
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__convert_time(ULONG seconds, LONG gmt_offset, struct tm * tm)
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{
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DECLARE_UTILITYBASE();
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struct ClockData clock_data;
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struct tm * result;
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ULONG delta;
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ENTER();
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assert( UtilityBase != NULL );
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/* We need to convert the time from Unix-style UTC
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* back into Amiga style local time.
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*
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* First, the Unix time offset will have to go.
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*/
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if(seconds < UNIX_TIME_OFFSET)
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seconds = 0;
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else
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seconds -= UNIX_TIME_OFFSET;
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/* Now the local time offset will have to go. */
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seconds -= gmt_offset;
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Amiga2Date(seconds, &clock_data);
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tm->tm_sec = clock_data.sec;
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tm->tm_min = clock_data.min;
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tm->tm_hour = clock_data.hour;
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tm->tm_mday = clock_data.mday;
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tm->tm_mon = clock_data.month - 1;
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tm->tm_year = clock_data.year - 1900;
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tm->tm_wday = clock_data.wday;
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tm->tm_isdst = -1;
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clock_data.mday = 1;
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clock_data.month = 1;
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delta = Date2Amiga(&clock_data);
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tm->tm_yday = (seconds - delta) / (24 * 60 * 60);
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result = tm;
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RETURN(result);
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return(result);
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}
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