Thread: [pure-lang-svn] SF.net SVN: pure-lang: [386] pure/trunk/examples/libor/date.pure

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Revision: 386
          http://pure-lang.svn.sourceforge.net/pure-lang/?rev=386&view=rev
Author:   yes
Date:     2008-07-04 14:27:31 -0700 (Fri, 04 Jul 2008)

Log Message:
-----------
improvements to date.pure

Modified Paths:
--------------
    pure/trunk/examples/libor/date.pure

Modified: pure/trunk/examples/libor/date.pure
===================================================================

--- pure/trunk/examples/libor/date.pure	2008-07-04 20:33:00 UTC (rev 385)
+++ pure/trunk/examples/libor/date.pure	2008-07-04 21:27:31 UTC (rev 386)
@@ -1,45 +1,79 @@
-/* Mayan Calendar - Copyright (c) 2008 by Libor Spacek
+/* New Calendar and Clock 
+   Copyright (c) 2008 by Libor Spacek
 
    Usage: pure -x date.pure [-h]
 
    Discrepancies with your local clock may occur when C library's time(); 
-   returns Posix time based on UTC (Universel Temps Coordonné) or TAI
-   (Temps Atomique Internacional) rather than local daylight saving time */
+   returns Posix time based on UTC (Universal Temps Coordinat) or TAI
+   (Temps Atomique International) rather than local daylight saving time */
 
-using system; 
-extern int time();
+using system;      // this is needed just to get C printf
+extern int time(); // makes available the C function time();
 
-puts "Mayan Calendar, Copyright (c) 2008 by Libor Spacek";
+puts "****************************************************************";
+puts "*    New Calendar/Clock, Copyright (c) 2008 by Libor Spacek    *";
+puts "****************************************************************";
+def posixepoch = (12:17:16:7:5); // Mayan long count date of the posix epoch
+def epochday   = mayan2days posixepoch; // (mayan) day of the posix epoch
+def endofcycle = (13:0:0:0:0);   // The end of the cycle 
+def cycledays  = mayan2days endofcycle; // total days in 13 Baktuns
+def secsinday  = 86400.0;       // number of seconds in a day
+def trueyear =  31556941.0;// (in seconds) divisible by 13 = current true year
+def myyear   =  31556943.0;// div by 2277, secsinday compatible, 365.2424 days
+def gregyear =  31556952.0;// div by 40824, mean gregorian year, 365.2425 days
 
-def posixepoch = (12:17:16:7:5); // Mayan long count date of the posix epoch
-def epochday = mayan2days posixepoch; // Mayan day of the posix epoch
-def endofdays = 15695;    // posix days at the end of the cycle (13th baktun)
-def secsinday = 86400;    // number of seconds in a day
-def cycledays = mayan2days (13:0:0:0:0);
-def year = 365.242374;
-def cycleyears = cycledays / year;
-   
-// time now in posix seconds converted to whole days
-posixsecsnow = time;      // call posixsecsnow to refresh the current time
-posixdays = posixsecsnow div secsinday;
-secsnow = posixsecsnow mod secsinday; 
-   
-// time calculations on the usual days:hours:minutes:seconds format
-dhms2secs (d::int:h::int:m::int:s) = 60.0*(60*(24*d+h)+m)+s;
-// secs are usually double and can be int or bigint but d,h,m are always ints
-secs2dhms secs = 
-   d:(h mod 24):(m mod 60):(secs-60.0*m)
+// current posix time supplied by C time();
+posixsecsnow = time; // int -  each new call refreshes to the current second
+secsnow = posixsecsnow mod (int secsinday); // int seconds since midnight
+
+// first some simple conversions
+secs2days s::int | secs2days s::bigint = s div (int secsinday);
+secs2days s::double = s / secsinday; // this returns double days
+days2secs d::int = secsinday * d;
+days2hours d::int = 24*d;
+hours2days h::int = h div 24;
+
+// conversions from/to days:hours:minutes:seconds format
+// seconds can be int or bigint or double. d,h,m are ints
+dhms2secs (d::int:h::int:m::int:s::int) |
+dhms2secs (d::int:h::int:m::int:s::bigint) |
+dhms2secs (d::int:h::int:m::int:s::double) = 60.0*(60*(24*d+h)+m)+s;
+secs2dhms secs::int | secs2dhms secs::bigint | secs2dhms secs::double =
+   d:(h mod 24):(m mod 60):(secs-60*m)
    when 
         m::int = int (secs / 60);
         h::int = m div 60; 
         d::int = h div 24 
    end;
-   
-// an arbitrary binary operator applied to two (days,hours,minutes,seconds) 
+// an arbitrary binary operator applied to two (days:hours:minutes:seconds) 
 opdhms op (d1::int:h1::int:m1::int:s1)(d2::int:h2::int:m2::int:s2) =
    secs2dhms (op (dhms2secs (d1:h1:m1:s1)) (dhms2secs (d2:h2:m2:s2)));
+      
+// conversions from/to hours:minutes:seconds format for displaying time of day.
+// hours may be more than 24 but use d:h:m:s for longer periods of time
+hms2secs (h::int:m::int:s::int) |
+hms2secs (h::int:m::int:s::bigint) |
+hms2secs (h::int:m::int:s::double) = 60.0*(60*h+m)+s;
+secs2hms secs::int | secs2hms secs::bigint | secs2hms secs::double = 
+   h:(m mod 60):(secs-60*m)
+   when 
+        m::int = int (secs / 60);
+        h::int = m div 60; 
+   end;
    
-// Now follows the Mayan Calendar
+// New Time Format! hours:3mins:10secs:secs = hours:tres:dicis:secs = h:t:d:s
+// the normal seconds are now just a single digit 0-9
+// dicis:secs are easy to read: 6:0 means 60 seconds, 12:5 125 seconds etc.
+// tres - multiply by three to get traditional babylonian minutes
+// hours as usual (24 hour clock)
+htds2secs (h::int:t::int:d::int:s::int) = 10.0*(18*(20*h+t)+d)+s;
+secs2htds secs::int | secs2htds secs::bigint | secs2htds secs::double =
+   h:(t mod 20):(d mod 18):(secs-10*d)
+   when 
+        d::int = int (secs / 10);
+        t::int = d div 18; 
+        h::int = t div 20 
+   end;
 
 // not used yet but could be, as in: addmayan posixepoch (days2mayan posixdays)
 addmayan (baktun1::int:katun1::int:tun1::int:vinal1::int:kin1::int)
@@ -59,11 +93,12 @@
 mayan2days (baktun::int:katun::int:tun::int:vinal::int:kin::int) = 
    20*(18*(20*(20*baktun+katun)+tun)+vinal)+kin;
 
-// simple calculations to print
-daytoday = epochday + posixdays;
-mayantoday = days2mayan daytoday;
-daysleft = endofdays - posixdays;
-mayanleft = days2mayan daysleft;
+// for now, let's just do some simple calculations to print
+daytoday = epochday + (secs2days posixsecsnow);  // mayan whole day count
+mayantoday = days2mayan daytoday; // as above but in mayan long count format
+daysleft = cycledays - epochday - (secs2days (double posixsecsnow)); // double
+mayanleft = days2mayan ((int daysleft));
+timeleft = secs2htds ((int secsinday) - secsnow);
 percentcomplete = 100.0*(epochday+posixsecsnow/secsinday)/cycledays;
 
 usage = puts "Usage:  pure -x date.pure [anyarg]" $
@@ -71,16 +106,21 @@
 
 case argc of 
   1 = 
-  void (printf "Posix time now: %s\n" (str (secs2dhms posixsecsnow))) $ 
-  void (printf "Mayan long count date: %s = day %d\n" 
-       ((str mayantoday), (mayan2days mayantoday))) $ 
-  void (printf "Mayan countdown today:   %s = %d days till the cycle ends\n" 
-       ((str mayanleft), daysleft)) $
-  void (printf "The Mayan cycle of over %d years " (int cycleyears)) $
-  void (printf "is now %11.8f%% complete!\n" percentcomplete);
-  2 = void (puts "Mayan long count digits (and their range of values):") $
-      void (puts "Baktun(0-12):Katun(0-19):Tun(0-19):Vinal(0-17):Kin(0-19)")$
-      puts "Baktun=144000days:Katun=7200days:Tun=360days:Vinal=20days:Kin=1day"$
-      usage;
+  void (printf "Mayan day %d + UTC Time %s = %s,%s\n" (daytoday,
+         (str (secs2hms secsnow)),(str mayantoday),(str (secs2htds secsnow))))$ 
+  void (printf "Long countdown %f(days left) =  %s,%s\n" 
+         (daysleft, (str mayanleft), (str timeleft))) $
+  void (printf "The Mayan cycle of over 5125 years is now %11.8f%% complete\n" 
+         percentcomplete ) $
+  void (puts"****************************************************************");
+  2 = 
+  void(puts "Mayan long count digits (and their range of values):") $
+  void(puts "Baktun(0-12) : Katun(0-19) : Tun(0-19) : Vinal(0-17) : Kin(0-19)")$
+  puts "Baktun=144000days Katun=7200days Tun=360days Vinal=20days Kin=day"$
+  void (puts "\nNew clock digits (and their range of values):") $
+  void (puts "Hour(0-23) : Tre(0-19) : Dici(0-17) : Sec(0-9)")$
+  puts "Hour=3600secs Tre=180secs Dici=10secs Sec=second\n"$
+  puts "Complete time count: Baktun:Katun:Tun:Vinal:Kin,Hour:Tre:Dici:Sec\n"
+  usage;
   n = usage otherwise
 end;


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