76 lines
1.4 KiB
C++
76 lines
1.4 KiB
C++
#include "time_helpers.h"
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#include <chrono>
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#include <iostream>
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namespace BareMinimumCrypto {
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using namespace std;
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using namespace chrono;
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Instant::Instant (int64_t x): x (x) {}
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Instant Instant::now () {
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const auto utc_now = system_clock::now ();
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return Instant {duration_cast <seconds> (utc_now.time_since_epoch ()).count ()};
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}
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bool TimeRange::contains (Instant x) const {
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if (not_after < not_before) {
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return false;
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}
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if (x.x < not_before) {
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return false;
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}
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if (x.x > not_after) {
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return false;
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}
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return true;
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}
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int64_t TimeRange::duration () const {
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return not_after - not_before;
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}
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TimeRange TimeRange::from_start_and_dur (Instant start, int64_t dur) {
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return TimeRange {
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start.x,
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start.x + dur
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};
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}
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// Most tests will use a virtual clock. But just as a smoke test,
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// make sure real time is realistic.
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int test_time () {
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const auto now = Instant::now ();
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const auto time_of_writing = 1610844872;
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const int64_t about_100_years = (int64_t)100 * 365 * 86400;
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const TimeRange tr {
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time_of_writing,
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time_of_writing + about_100_years
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};
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if (! tr.contains (now)) {
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cerr << "System clock is acting weird" << endl;
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return 1;
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}
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const TimeRange bad_tr {
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time_of_writing + about_100_years,
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time_of_writing
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};
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if (bad_tr.contains (now)) {
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cerr << "Invalid TimeRange should not contain any Instants" << endl;
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return 1;
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}
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return 0;
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}
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}
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