| 1 | //
|
|---|
| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
|
|---|
| 3 | //
|
|---|
| 4 | // The contents of this file are covered under the licence agreement in the
|
|---|
| 5 | // file "LICENCE" distributed with Cforall.
|
|---|
| 6 | //
|
|---|
| 7 | // time.cfa --
|
|---|
| 8 | //
|
|---|
| 9 | // Author : Peter A. Buhr
|
|---|
| 10 | // Created On : Tue Mar 27 17:24:56 2018
|
|---|
| 11 | // Last Modified By : Peter A. Buhr
|
|---|
| 12 | // Last Modified On : Fri Sep 13 00:57:15 2024
|
|---|
| 13 | // Update Count : 77
|
|---|
| 14 | //
|
|---|
| 15 |
|
|---|
| 16 | #include "time.hfa"
|
|---|
| 17 | #include <fstream.hfa>
|
|---|
| 18 | #include <stdlib.h> // putenv
|
|---|
| 19 |
|
|---|
| 20 | extern "C" size_t malloc_unfreed() { return 4096; } // guess at unfreed storage from putenv/tzset
|
|---|
| 21 |
|
|---|
| 22 | int main() {
|
|---|
| 23 | // Set fixed time location to obtain repeatable output where ever run.
|
|---|
| 24 | putenv( "TZ=America/Toronto" ); // pick fixed time zone
|
|---|
| 25 | // tzset has the stupidest interface I have ever seen.
|
|---|
| 26 | tzset(); // set time zone
|
|---|
| 27 |
|
|---|
| 28 | Duration d1 = 3`h, d2 = 2`s, d3 = 3.375`s, d4 = 12`s, d5 = 1`s + 10_000`ns;
|
|---|
| 29 | sout | d1 | d2 | d3 | d4 | d5;
|
|---|
| 30 | sout | d1`dd | d2`dm | d3`ds | d4`dms | d5`dus;
|
|---|
| 31 | d1 = 0;
|
|---|
| 32 | sout | d1 | d2 | d3;
|
|---|
| 33 | d1 = 7`s;
|
|---|
| 34 | d3 = d2 = d1;
|
|---|
| 35 | sout | d1 | d2 | d3;
|
|---|
| 36 | d1 = d1 + d2;
|
|---|
| 37 | sout | d1;
|
|---|
| 38 | sout | d1 == 7`s | d1 == d2 | d1 == 0;
|
|---|
| 39 | sout | div( 7`s, 2`s );
|
|---|
| 40 | sout | nl;
|
|---|
| 41 |
|
|---|
| 42 | Time t = { 1970, 1, 2, 0, 0, 0, 10_000_000 };
|
|---|
| 43 | sout | t;
|
|---|
| 44 | t = t + d1;
|
|---|
| 45 | sout | t | t`ns;
|
|---|
| 46 | Time t1 = (timespec){ 104_414, 10_000_000 };
|
|---|
| 47 | sout | t1 | t1`ns;
|
|---|
| 48 | sout | t - t | t + d5 | t`ns;
|
|---|
| 49 | char buf[64];
|
|---|
| 50 | sout | "yy/mm/dd" | [t, buf]`ymd | nonl; // shared buf => separate calls
|
|---|
| 51 | sout | "mm/dd/yy" | mm_dd_yy( t, buf ) | nonl;
|
|---|
| 52 | strftime( buf, 16, "%D", t ); // %D => mm/dd/yy
|
|---|
| 53 | sout | "mm/dd/yy" | buf | nonl;
|
|---|
| 54 | sout | "dd/yy/mm" | [t, buf]`dmy;
|
|---|
| 55 | Time t2 = { 2001, 7, 4, 0, 0, 1, 0 }, t3 = (timeval){ 994_219_201 };
|
|---|
| 56 | sout | t2 | t2`ns | nl | t3 | t3`ns;
|
|---|
| 57 | sout | nl;
|
|---|
| 58 |
|
|---|
| 59 | // Clock Newfoundland = { -3.5`h }, PST = { -8`h }; // distance from GMT (UTC)
|
|---|
| 60 | // sout | "Clock Resolution" | getRes()
|
|---|
| 61 | // | "Newfoundland" | getTime( Newfoundland )
|
|---|
| 62 | // | "local" | getTime()
|
|---|
| 63 | // | "local nsec" | timeHiRes()
|
|---|
| 64 | // | "PST" | PST(); // getTime short form
|
|---|
| 65 | // sout | nl;
|
|---|
| 66 |
|
|---|
| 67 | // http://en.cppreference.com/w/cpp/chrono/duration/operator_arith4
|
|---|
| 68 | Duration s = 1`h + 2 * 10`m + 70`s / 10;
|
|---|
| 69 | sout | "1 hour + 2*10 min + 70/10 sec = " | s | "seconds";
|
|---|
| 70 | sout | "Dividing that by 2 minutes gives" | s / 2`m;
|
|---|
| 71 | sout | "Dividing that by 2 gives" | s / 2 | "seconds";
|
|---|
| 72 | sout | s | "seconds is" | s`h | "hours," | (s % 1`h)`m | "minutes," | (s % 1`m)`s | "seconds";
|
|---|
| 73 |
|
|---|
| 74 | t1 = (Time){ 2020, 1, 5, 9, 0, 0, 100000000000LL };
|
|---|
| 75 | t2 = (Time){ 1969, 13, 5, 9 };
|
|---|
| 76 | t3 = (Time){ 1970, 25, 366, 48, 120, -120, 60000000000LL };
|
|---|
| 77 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t1 );
|
|---|
| 78 | sout | buf;
|
|---|
| 79 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t2 );
|
|---|
| 80 | sout | buf;
|
|---|
| 81 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t3 );
|
|---|
| 82 | sout | buf;
|
|---|
| 83 | } // main
|
|---|
