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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/REC-html40/Transitional.dtd">
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<title>[date.h] Type: Date</title>
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<h1><font color="#008B8B">[date.h] Type: Date</font></h1>
<h2><font color="#008B8B"><a href="styx.html">contents</a></font></h2><br>
<br><a href="standard.htm">#include "standard.h"</a>
<br><a href="sink.htm">#include "sink.h"</a>
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<br><hr width="100%" size=2><h2><b> The Type </b></h2>
<br><pre>
The data type DATE is implemented as number of days since 01.01.0000.
This origin date is represented by the number 0.
The rules for the conversion of a date
internal format <--> external day/month/year-format
rely on the Gregorian calendar:
1) A normal year has 365 days, a leap year 366 days.
2) All years, divisible by 4, are leap years, except
3) the years, divisible by 100, this except
4) the years, divisible by 400.
</pre>
<br><pre>typedef long Date; /* range DMY(01,01,0000) .. DMY(31,12,9999) */
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<br><hr width="100%" size=2><h2><b> Init </b></h2>
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<td bgcolor="#FFF8DC" align=left><pre>void <b>date_init</b>(void)</pre>
<td bgcolor="#FFF0F5" align=left>init date module
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<br><hr width="100%" size=2><h2><b> Date operations </b></h2>
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<td bgcolor="#FFF8DC" align=left><pre>c_bool <b>LeapYear</b>(int Year)</pre>
<td bgcolor="#FFF0F5" align=left>whether 'Year' is a leap year
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<td bgcolor="#FFF8DC" align=left><pre>c_bool <b>validDMY</b>(int Day, int Month, int Year)</pre>
<td bgcolor="#FFF0F5" align=left> whether 'Day'.'Month'.'Year' is a valid date <br>
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<td bgcolor="#FFF8DC" align=left><pre>Date <b>DMY</b>(int Day, int Month, int Year)</pre>
<td bgcolor="#FFF0F5" align=left> converts 'Day'.'Month'.'Year' into the internal date format <br>
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<td bgcolor="#FFF8DC" align=left><pre>int <b>Year</b>(Date days)</pre>
<td bgcolor="#FFF0F5" align=left>year of 'days' ( result >= 0 )
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<td bgcolor="#FFF8DC" align=left><pre>int <b>Month</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left>month of 'date' ( result >= 1 )
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<td bgcolor="#FFF8DC" align=left><pre>int <b>Day</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left>day of 'date' ( result >= 1 )
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<td bgcolor="#FFF8DC" align=left><pre>int <b>WeekDay</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left>weekday of 'date' ( sunday = 0, saturday = 6 )
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<td bgcolor="#FFF8DC" align=left><pre>Date <b>Today</b>(void)</pre>
<td bgcolor="#FFF0F5" align=left>current date ( system clock )
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<td bgcolor="#FFF8DC" align=left><pre>c_string <b>CurTime</b>(void)</pre>
<td bgcolor="#FFF0F5" align=left>current time ( system clock ); allocs memory
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<td bgcolor="#FFF8DC" align=left><pre>int <b>MonthLength</b>(int Month, int Year)</pre>
<td bgcolor="#FFF0F5" align=left>the number of days in month
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<td bgcolor="#FFF8DC" align=left><pre>Date <b>Str_Date</b>(c_string date)</pre>
<td bgcolor="#FFF0F5" align=left> converts 'date' [ "dd.mm.yy" | "dd.mm.yyyy" ]<br>
into the internal date format<br>
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<td bgcolor="#FFF8DC" align=left><pre>c_string <b>Date_Str</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left> converts 'date' to string type [ "tt.mm.jjjj" ]; allocs memory <br>
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<br><hr width="100%" size=2><h2><b> Debug </b></h2>
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<td bgcolor="#FFF8DC" align=left><pre>void <b>pDate4</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left>print 'date' [ "tt.mm.jjjj" ]
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<td bgcolor="#FFF8DC" align=left><pre>void <b>pDate2</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left>print 'date' [ "tt.mm.jj" ]
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<td bgcolor="#FFF8DC" align=left><pre>void <b>pDateS</b>(Date date)</pre>
<td bgcolor="#FFF0F5" align=left>print 'date' [ "...Anno..." ]
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