forked from KolibriOS/kolibrios
78 lines
3.8 KiB
C
78 lines
3.8 KiB
C
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/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Check if a year is a leap year + associated arrays
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*
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****************************************************************************/
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#include "variety.h"
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#include <time.h>
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#include "rtdata.h"
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#include "timedata.h"
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short const __based(__segname("_CONST")) __diyr[] = { /* days in normal year array */
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0, /* Jan */
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31, /* Feb */
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31 + 28, /* Mar */
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31 + 28 + 31, /* Apr */
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31 + 28 + 31 + 30, /* May */
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31 + 28 + 31 + 30 + 31, /* Jun */
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31 + 28 + 31 + 30 + 31 + 30, /* Jul */
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31 + 28 + 31 + 30 + 31 + 30 + 31, /* Aug */
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, /* Sep */
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, /* Oct */
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, /* Nov */
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, /* Dec */
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 /* Jan, next year */
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};
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short const __based(__segname("_CONST")) __dilyr[] = { /* days in leap year array */
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0, /* Jan */
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31, /* Feb */
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31 + 29, /* Mar */
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31 + 29 + 31, /* Apr */
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31 + 29 + 31 + 30, /* May */
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31 + 29 + 31 + 30 + 31, /* Jun */
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31 + 29 + 31 + 30 + 31 + 30, /* Jul */
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31 + 29 + 31 + 30 + 31 + 30 + 31, /* Aug */
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31, /* Sep */
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30, /* Oct */
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, /* Nov */
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, /* Dec */
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 /* Jan, next year */
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};
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int __leapyear( unsigned year )
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{
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if( year & 3 )
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return( 0 );
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if( ( year % 100 ) != 0 )
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return( 1 );
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if( ( year % 400 ) == 0 )
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return( 1 );
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return( 0 );
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}
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