| 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 : Fri Sep 13 00:57:15 2024 |
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| 13 | // Update Count : 77 |
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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 4096; } // guess at unfreed storage from putenv/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" ); // pick fixed time zone |
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| 25 | // tzset has the stupidest interface I have ever seen. |
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| 26 | tzset(); // set time zone |
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| 27 | |
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| 28 | Duration d1 = 3`h, d2 = 2`s, d3 = 3.375`s, d4 = 12`s, d5 = 1`s + 10_000`ns; |
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| 29 | sout | d1 | d2 | d3 | d4 | d5; |
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| 30 | sout | d1`dd | d2`dm | d3`ds | d4`dms | d5`dus; |
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| 31 | d1 = 0; |
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| 32 | sout | d1 | d2 | d3; |
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| 33 | d1 = 7`s; |
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| 34 | d3 = d2 = d1; |
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| 35 | sout | d1 | d2 | d3; |
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| 36 | d1 = d1 + d2; |
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| 37 | sout | d1; |
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| 38 | sout | d1 == 7`s | d1 == d2 | d1 == 0; |
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| 39 | sout | div( 7`s, 2`s ); |
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| 40 | sout | nl; |
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| 41 | |
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| 42 | Time t = { 1970, 1, 2, 0, 0, 0, 10_000_000 }; |
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| 43 | sout | t; |
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| 44 | t = t + d1; |
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| 45 | sout | t | t`ns; |
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| 46 | Time t1 = (timespec){ 104_414, 10_000_000 }; |
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| 47 | sout | t1 | t1`ns; |
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| 48 | sout | t - t | t + d5 | t`ns; |
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| 49 | char buf[64]; |
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| 50 | sout | "yy/mm/dd" | [t, buf]`ymd | nonl; // shared buf => separate calls |
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| 51 | sout | "mm/dd/yy" | mm_dd_yy( t, buf ) | nonl; |
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| 52 | strftime( buf, 16, "%D", t ); // %D => mm/dd/yy |
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| 53 | sout | "mm/dd/yy" | buf | nonl; |
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| 54 | sout | "dd/yy/mm" | [t, buf]`dmy; |
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| 55 | Time t2 = { 2001, 7, 4, 0, 0, 1, 0 }, t3 = (timeval){ 994_219_201 }; |
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| 56 | sout | t2 | t2`ns | nl | t3 | t3`ns; |
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| 57 | sout | nl; |
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| 58 | |
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| 59 | // Clock Newfoundland = { -3.5`h }, PST = { -8`h }; // distance from GMT (UTC) |
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| 60 | // sout | "Clock Resolution" | getRes() |
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| 61 | // | "Newfoundland" | getTime( Newfoundland ) |
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| 62 | // | "local" | getTime() |
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| 63 | // | "local nsec" | timeHiRes() |
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| 64 | // | "PST" | PST(); // getTime short form |
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| 65 | // sout | nl; |
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| 66 | |
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| 67 | // http://en.cppreference.com/w/cpp/chrono/duration/operator_arith4 |
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| 68 | Duration s = 1`h + 2 * 10`m + 70`s / 10; |
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| 69 | sout | "1 hour + 2*10 min + 70/10 sec = " | s | "seconds"; |
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| 70 | sout | "Dividing that by 2 minutes gives" | s / 2`m; |
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| 71 | sout | "Dividing that by 2 gives" | s / 2 | "seconds"; |
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| 72 | sout | s | "seconds is" | s`h | "hours," | (s % 1`h)`m | "minutes," | (s % 1`m)`s | "seconds"; |
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| 73 | |
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| 74 | t1 = (Time){ 2020, 1, 5, 9, 0, 0, 100000000000LL }; |
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| 75 | t2 = (Time){ 1969, 13, 5, 9 }; |
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| 76 | t3 = (Time){ 1970, 25, 366, 48, 120, -120, 60000000000LL }; |
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| 77 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t1 ); |
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| 78 | sout | buf; |
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| 79 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t2 ); |
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| 80 | sout | buf; |
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| 81 | strftime( buf, 128, "%Y %b %e %H:%M:%S (GMT)", t3 ); |
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| 82 | sout | buf; |
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| 83 | } // main |
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