mirror of
https://github.com/HowardHinnant/date.git
synced 2025-01-14 17:58:03 +08:00
99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
#include <chrono>
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#include "date/tz.h"
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int
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main()
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{
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using namespace date;
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using namespace std::chrono_literals;
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using namespace std::chrono;
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/// sys epoch
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{
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auto ls = local_days{1970_y/01/01_d};
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auto st = clock_cast<system_clock>(ls);
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assert(clock_cast<local_t>(st) == ls);
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assert(st.time_since_epoch() == 0s);
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}
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/// sys 2000 case
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{
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auto ls = local_days{2000_y/01/01_d};
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auto st = clock_cast<system_clock>(ls);
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assert(clock_cast<local_t>(st) == ls);
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assert(st.time_since_epoch() == 946'684'800s);
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}
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/// utc epoch
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{
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auto lu = local_days{1970_y/01/01_d};
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auto ut = clock_cast<utc_clock>(lu);
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assert(clock_cast<local_t>(ut) == lu);
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assert(ut.time_since_epoch() == 0s);
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}
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/// utc paper example
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{
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auto lu = local_days{2000_y/01/01_d};
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auto ut = clock_cast<utc_clock>(lu);
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assert(clock_cast<local_t>(ut) == lu);
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assert(ut.time_since_epoch() == 946'684'822s);
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}
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/// tai epoch
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{
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auto lt = local_days{1958_y/01/01_d};
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auto tt = clock_cast<tai_clock>(lt);
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assert(clock_cast<local_t>(tt) == lt);
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assert(tt.time_since_epoch() == 0s);
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auto lu = local_days{1957_y/12/31_d} + 23h + 59min + 50s;
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auto ut = clock_cast<utc_clock>(lu);
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assert(clock_cast<tai_clock>(ut) == tt);
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}
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// tai paper example
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{
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auto lt = local_days{2000_y/01/01_d} + 32s;
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auto tt = clock_cast<tai_clock>(lt);
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assert(clock_cast<local_t>(tt) == lt);
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auto lu = local_days{2000_y/01/01_d};
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auto ut = clock_cast<utc_clock>(lu);
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assert(clock_cast<tai_clock>(ut) == tt);
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}
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/// gps epoch
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{
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auto lg = local_days{1980_y/01/Sunday[1]};
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auto gt = clock_cast<gps_clock>(lg);
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assert(clock_cast<local_t>(gt) == lg);
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assert(gt.time_since_epoch() == 0s);
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auto lu = local_days{1980_y/01/Sunday[1]};
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auto ut = clock_cast<utc_clock>(lu);
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assert(clock_cast<gps_clock>(ut) == gt);
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auto lt = local_days{1980_y/01/Sunday[1]} + 19s;
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auto tt = clock_cast<tai_clock>(lt);
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assert(clock_cast<gps_clock>(tt) == gt);
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}
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// gps 2000 example
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{
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auto lg = local_days{2000_y/01/01_d};
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auto gt = clock_cast<gps_clock>(lg);
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assert(clock_cast<local_t>(gt) == lg);
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auto lu = local_days{2000_y/01/01_d} - 13s;
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auto ut = clock_cast<utc_clock>(lu);
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assert(clock_cast<gps_clock>(ut) == gt);
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auto lt = local_days{2000_y/01/01_d} + 19s;
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auto tt = clock_cast<tai_clock>(lt);
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assert(clock_cast<gps_clock>(tt) == gt);
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}
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}
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