ba237a9d91
Files correlati : Ricompilazione Demo : [ ] Commento : Aggiunti i sorgenti per Greenleaf Math Library (gfm.dll) git-svn-id: svn://10.65.10.50/trunk@10079 c028cbd2-c16b-5b4b-a496-9718f37d4682
60 lines
1.2 KiB
C
Executable File
60 lines
1.2 KiB
C
Executable File
/* int DaysBetweenDates360(m1,d1,y1, m2,d2,y2)
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*
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* ARGUMENT
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* int m1,d1,y1; - Base Date
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* int m2,d2,y2; - Date to compare with base
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*
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* DESCRIPTION
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* Compares two dates in date args format, forming the difference in
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* whole days. The result is a signed number:
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*
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* In this one, all months are 30 days (e.g. year is 360 days).
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*
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* 0 if dates are same,
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* +n if date1 > date2
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* -n if date1 < date2
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*
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* SIDE EFFECTS
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* None.
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*
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* RETURNS
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* +,-, or 0 days. 0 can indicate an error.
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*
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* POSSIBLE ERROR CODES
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* GM_ARGVAL
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* GM_OVERFLOW
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*
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* AUTHOR
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* 05-Aug-1987 12:43:39
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* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
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*
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* MODIFICATIONS
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*/
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#include <stdio.h>
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#include "gmsystem.h"
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int DaysBetweenDates360(m1,d1,y1,m2,d2,y2)
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int m1,d1,y1,m2,d2,y2;
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{
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long n;
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_MacStart(GM_DBD360);
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if (m1<1||m1>12||d1<1||d1>31||y1<0||y1>9999||
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m2<1||m2>12||d2<1||d2>31||y2<0||y2>9999) {
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_MacErr(GM_ARGVAL);
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_MacRet(0);
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}
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if (d2==31)
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d2=30;
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if (d1==31 && d2>=30)
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d1=30;
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n = (long) (y1-y2) * 360L + (long) ((m1 - m2) * 30 + (d1 - d2));
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if (n<-32768L || n>32767L) {
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_MacErr(GM_OVERFLOW);
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_MacRet(0);
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}
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_MacRet((int) n);
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}
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