mirror of
https://github.com/DarkflameUniverse/DarkflameServer.git
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e213a7aeff
The NexusDashboard-parity dashboard (dDashboardServer) and everything built on it on the experimental branch: accounts, characters, properties and moderation tools, permissions shared with in-game slash commands, economy reports, World 3D and property 3D views with client scenery, scheduled events (features, vanity changes, live events, announcements, restarts), vanity files and events, the CDClient browser, the message inspector with saved captures, chat filter tools, community challenges, live ops, the AI moderator helper, and the server-side changes they need. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
#pragma once
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#include <cstdint>
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/**
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* Calendar dates as days since 1970-01-01 and back (Howard Hinnant's algorithms), for schedules that work in whole
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* days: the dashboard's cron schedules (Cron.h) and the vanity event rules (VanityEvents.h).
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*/
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namespace CivilDate {
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struct Date { int64_t year; unsigned month; unsigned day; };
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inline int64_t DaysFromCivil(int64_t y, unsigned m, unsigned d) {
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y -= m <= 2;
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const int64_t era = (y >= 0 ? y : y - 399) / 400;
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const auto yoe = static_cast<unsigned>(y - era * 400);
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const unsigned doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1;
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const unsigned doe = yoe * 365 + yoe / 4 - yoe / 100 + doy;
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return era * 146097 + static_cast<int64_t>(doe) - 719468;
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}
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inline Date CivilFromDays(int64_t z) {
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z += 719468;
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const int64_t era = (z >= 0 ? z : z - 146096) / 146097;
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const auto doe = static_cast<unsigned>(z - era * 146097);
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const unsigned yoe = (doe - doe / 1460 + doe / 36524 - doe / 146096) / 365;
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const unsigned doy = doe - (365 * yoe + yoe / 4 - yoe / 100);
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const unsigned mp = (5 * doy + 2) / 153;
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const unsigned d = doy - (153 * mp + 2) / 5 + 1;
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const unsigned m = mp < 10 ? mp + 3 : mp - 9;
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return { static_cast<int64_t>(yoe) + era * 400 + (m <= 2), m, d };
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}
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// 0 = Sunday; 1970-01-01 was a Thursday
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inline unsigned Weekday(int64_t daysSinceEpoch) {
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return static_cast<unsigned>(((daysSinceEpoch % 7) + 11) % 7);
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}
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// The day a unix time falls on, rounding down for times before 1970 too
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inline int64_t DayOf(int64_t seconds) {
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return seconds >= 0 ? seconds / 86400 : (seconds - 86399) / 86400;
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}
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inline bool IsLeapYear(int64_t year) {
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return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
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}
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inline unsigned DaysInMonth(int64_t year, unsigned month) {
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static constexpr unsigned DAYS[]{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
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return month == 2 && IsLeapYear(year) ? 29 : DAYS[(month - 1) % 12];
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}
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}
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