/* * Copyright (c) 2018-2020, Andreas Kling * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include namespace Core { DateTime DateTime::now() { return from_timestamp(time(nullptr)); } DateTime DateTime::create(unsigned year, unsigned month, unsigned day, unsigned hour, unsigned minute, unsigned second) { DateTime dt; dt.set_time(year, month, day, hour, minute, second); return dt; } DateTime DateTime::from_timestamp(time_t timestamp) { struct tm tm; localtime_r(×tamp, &tm); DateTime dt; dt.m_year = tm.tm_year + 1900; dt.m_month = tm.tm_mon + 1; dt.m_day = tm.tm_mday; dt.m_hour = tm.tm_hour; dt.m_minute = tm.tm_min; dt.m_second = tm.tm_sec; dt.m_timestamp = timestamp; return dt; } unsigned DateTime::weekday() const { return ::day_of_week(m_year, m_month, m_day); } unsigned DateTime::days_in_month() const { return ::days_in_month(m_year, m_month); } unsigned DateTime::day_of_year() const { return ::day_of_year(m_year, m_month, m_day); } bool DateTime::is_leap_year() const { return ::is_leap_year(m_year); } void DateTime::set_time(unsigned year, unsigned month, unsigned day, unsigned hour, unsigned minute, unsigned second) { struct tm tm = {}; tm.tm_sec = (int)second; tm.tm_min = (int)minute; tm.tm_hour = (int)hour; tm.tm_mday = (int)day; tm.tm_mon = (int)month - 1; tm.tm_year = (int)year - 1900; tm.tm_isdst = -1; // mktime() doesn't read tm.tm_wday and tm.tm_yday, no need to fill them in. m_timestamp = mktime(&tm); // mktime() normalizes the components to the right ranges (Jan 32 -> Feb 1 etc), so read fields back out from tm. m_year = tm.tm_year + 1900; m_month = tm.tm_mon + 1; m_day = tm.tm_mday; m_hour = tm.tm_hour; m_minute = tm.tm_min; m_second = tm.tm_sec; } String DateTime::to_string(const String& format) const { const char wday_short_names[7][4] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; const char wday_long_names[7][10] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; const char mon_short_names[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; const char mon_long_names[12][10] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; struct tm tm; localtime_r(&m_timestamp, &tm); StringBuilder builder; const int format_len = format.length(); for (int i = 0; i < format_len; ++i) { if (format[i] != '%') { builder.append(format[i]); } else { if (++i == format_len) return String(); switch (format[i]) { case 'a': builder.append(wday_short_names[tm.tm_wday]); break; case 'A': builder.append(wday_long_names[tm.tm_wday]); break; case 'b': builder.append(mon_short_names[tm.tm_mon]); break; case 'B': builder.append(mon_long_names[tm.tm_mon]); break; case 'C': builder.appendf("%02d", (tm.tm_year + 1900) / 100); break; case 'd': builder.appendf("%02d", tm.tm_mday); break; case 'D': builder.appendf("%02d/%02d/%02d", tm.tm_mon + 1, tm.tm_mday, (tm.tm_year + 1900) % 100); break; case 'e': builder.appendf("%2d", tm.tm_mday); break; case 'h': builder.append(mon_short_names[tm.tm_mon]); break; case 'H': builder.appendf("%02d", tm.tm_hour); break; case 'I': builder.appendf("%02d", tm.tm_hour % 12); break; case 'j': builder.appendf("%03d", tm.tm_yday + 1); break; case 'm': builder.appendf("%02d", tm.tm_mon + 1); break; case 'M': builder.appendf("%02d", tm.tm_min); break; case 'n': builder.append('\n'); break; case 'p': builder.append(tm.tm_hour < 12 ? "a.m." : "p.m."); break; case 'r': builder.appendf("%02d:%02d:%02d %s", tm.tm_hour % 12, tm.tm_min, tm.tm_sec, tm.tm_hour < 12 ? "a.m." : "p.m."); break; case 'R': builder.appendf("%02d:%02d", tm.tm_hour, tm.tm_min); break; case 'S': builder.appendf("%02d", tm.tm_sec); break; case 't': builder.append('\t'); break; case 'T': builder.appendf("%02d:%02d:%02d", tm.tm_hour, tm.tm_min, tm.tm_sec); break; case 'u': builder.appendf("%d", tm.tm_wday ? tm.tm_wday : 7); break; case 'U': { const int wday_of_year_beginning = (tm.tm_wday + 6 * tm.tm_yday) % 7; const int week_number = (tm.tm_yday + wday_of_year_beginning) / 7; builder.appendf("%02d", week_number); break; } case 'V': { const int wday_of_year_beginning = (tm.tm_wday + 6 + 6 * tm.tm_yday) % 7; int week_number = (tm.tm_yday + wday_of_year_beginning) / 7 + 1; if (wday_of_year_beginning > 3) { if (tm.tm_yday >= 7 - wday_of_year_beginning) --week_number; else { const int days_of_last_year = days_in_year(tm.tm_year + 1900 - 1); const int wday_of_last_year_beginning = (wday_of_year_beginning + 6 * days_of_last_year) % 7; week_number = (days_of_last_year + wday_of_last_year_beginning) / 7 + 1; if (wday_of_last_year_beginning > 3) --week_number; } } builder.appendf("%02d", week_number); break; } case 'w': builder.appendf("%d", tm.tm_wday); break; case 'W': { const int wday_of_year_beginning = (tm.tm_wday + 6 + 6 * tm.tm_yday) % 7; const int week_number = (tm.tm_yday + wday_of_year_beginning) / 7; builder.appendf("%02d", week_number); break; } case 'y': builder.appendf("%02d", (tm.tm_year + 1900) % 100); break; case 'Y': builder.appendf("%d", tm.tm_year + 1900); break; case '%': builder.append('%'); break; default: return String(); } } } return builder.build(); } bool DateTime::is_before(const String& other) const { auto now_string = String::format("%04d%02d%02d%02d%02d%02dZ", year(), month(), weekday(), hour(), minute(), second()); return __builtin_strcasecmp(now_string.characters(), other.characters()) < 0; } const LogStream& operator<<(const LogStream& stream, const DateTime& value) { return stream << value.to_string(); } }