| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // time.cfa --
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| 8 | //
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| 9 | // Author : Peter A. Buhr
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| 10 | // Created On : Tue Mar 27 17:24:56 2018
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Thu Jul 18 22:45:43 2024
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| 13 | // Update Count : 65
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| 14 | //
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| 15 |
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| 16 | #include "time.hfa"
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| 17 | #include <fstream.hfa>
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| 18 | #include <stdlib.h> // putenv
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| 19 |
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| 20 | extern "C" size_t malloc_unfreed() { return 385; } // unfreed storage from tzset
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| 21 |
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| 22 | int main() {
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| 23 | // Set fixed time location to obtain repeatable output where ever run.
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| 24 | putenv( "TZ=America/Toronto" ); // set fixed time zone
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| 25 | tzset(); // set time zone
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| 26 |
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| 27 | Duration d1 = 3`h, d2 = 2`s, d3 = 3.375`s, d4 = 12`s, d5 = 1`s + 10_000`ns;
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| 28 | sout | d1 | d2 | d3 | d4 | d5;
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| 29 | sout | d1`dd | d2`dm | d3`ds | d4`dms | d5`dus;
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| 30 | d1 = 0;
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| 31 | sout | d1 | d2 | d3;
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| 32 | d1 = 7`s;
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| 33 | d3 = d2 = d1;
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| 34 | sout | d1 | d2 | d3;
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| 35 | d1 = d1 + d2;
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| 36 | sout | d1;
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| 37 | sout | d1 == 7`s | d1 == d2 | d1 == 0;
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| 38 | sout | div( 7`s, 2`s );
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| 39 | sout | nl;
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| 40 |
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| 41 | Time t = { 1970, 1, 2, 0, 0, 0, 10_000_000 };
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| 42 | sout | t;
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| 43 | t = t + d1;
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| 44 | sout | t | t`ns;
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| 45 | Time t1 = (timespec){ 104_414, 10_000_000 };
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| 46 | sout | t1 | t1`ns;
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| 47 | sout | t - t | t + d5 | t`ns;
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| 48 | char buf[64];
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| 49 | sout | "yy/mm/dd" | [t, buf]`ymd | nonl; // shared buf => separate calls
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| 50 | sout | "mm/dd/yy" | mm_dd_yy( t, buf ) | nonl;
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| 51 | strftime( buf, 16, "%D", t ); // %D => mm/dd/yy
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| 52 | sout | "mm/dd/yy" | buf | nonl;
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| 53 | sout | "dd/yy/mm" | [t, buf]`dmy;
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| 54 | Time t2 = { 2001, 7, 4, 0, 0, 1, 0 }, t3 = (timeval){ 994_219_201 };
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| 55 | sout | t2 | t2`ns | nl | t3 | t3`ns;
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| 56 | sout | nl;
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| 57 |
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| 58 | // Clock Newfoundland = { -3.5`h }, PST = { -8`h }; // distance from GMT (UTC)
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| 59 | // sout | "Clock Resolution" | getRes()
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| 60 | // | "Newfoundland" | getTime( Newfoundland )
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| 61 | // | "local" | getTime()
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| 62 | // | "local nsec" | timeHiRes()
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| 63 | // | "PST" | PST(); // getTime short form
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| 64 | // sout | nl;
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| 65 |
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| 66 | // http://en.cppreference.com/w/cpp/chrono/duration/operator_arith4
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| 67 | Duration s = 1`h + 2 * 10`m + 70`s / 10;
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| 68 | sout | "1 hour + 2*10 min + 70/10 sec = " | s | "seconds";
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| 69 | sout | "Dividing that by 2 minutes gives" | s / 2`m;
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| 70 | sout | "Dividing that by 2 gives" | s / 2 | "seconds";
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| 71 | sout | s | "seconds is" | s`h | "hours," | (s % 1`h)`m | "minutes," | (s % 1`m)`s | "seconds";
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| 72 |
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| 73 | t1 = (Time){ 2020, 1, 5, 9, 0, 0, 100000000000LL };
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| 74 | t2 = (Time){ 1969, 13, 5, 9 };
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| 75 | t3 = (Time){ 1970, 25, 366, 48, 120, -120, 60000000000LL };
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| 76 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t1 );
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| 77 | sout | buf;
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| 78 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t2 );
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| 79 | sout | buf;
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| 80 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t3 );
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| 81 | sout | buf;
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| 82 | } // main
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| 83 |
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| 84 | // Local Variables: //
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| 85 | // mode: c //
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| 86 | // tab-width: 4 //
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| 87 | // compile-command: "cfa time.cfa" //
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| 88 | // End: //
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