Files
zoneminder/src/zm_time.cpp
2026-01-24 11:17:57 -05:00

77 lines
3.3 KiB
C++

//
// ZoneMinder Time Functions & Definitions, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#include "zm_time.h"
#include <cinttypes>
#include <ctime>
std::string SystemTimePointToString(SystemTimePoint tp) {
time_t tp_sec = std::chrono::system_clock::to_time_t(tp);
Microseconds now_frac = std::chrono::duration_cast<Microseconds>(
tp.time_since_epoch() - std::chrono::duration_cast<Seconds>(tp.time_since_epoch()));
std::string timeString;
timeString.reserve(64);
char *timePtr = &*(timeString.begin());
tm tp_tm = {};
timePtr += strftime(timePtr, timeString.capacity(), "%x %H:%M:%S", localtime_r(&tp_sec, &tp_tm));
snprintf(timePtr, timeString.capacity() - (timePtr - timeString.data()), ".%06" PRIi64, static_cast<int64_t>(now_frac.count()));
return timeString;
}
std::string SystemTimePointToMysqlString(SystemTimePoint tp) {
time_t tp_sec = std::chrono::system_clock::to_time_t(tp);
Microseconds now_frac = std::chrono::duration_cast<Microseconds>(
tp.time_since_epoch() - std::chrono::duration_cast<Seconds>(tp.time_since_epoch()));
std::string timeString;
timeString.reserve(64);
char *timePtr = &*(timeString.begin());
tm tp_tm = {};
timePtr += strftime(timePtr, timeString.capacity(), "%Y-%m-%d %H:%M:%S", localtime_r(&tp_sec, &tp_tm));
snprintf(timePtr, timeString.capacity() - (timePtr - timeString.data()), ".%06" PRIi64, static_cast<int64_t>(now_frac.count()));
return timeString;
}
std::string TimePointToString(TimePoint tp) {
const auto tp_dur = std::chrono::duration_cast<std::chrono::system_clock::duration>(tp - std::chrono::steady_clock::now());
time_t tp_sec = std::chrono::system_clock::to_time_t(
std::chrono::system_clock::now() + tp_dur);
Microseconds now_frac = std::chrono::duration_cast<Microseconds>(
tp.time_since_epoch() - std::chrono::duration_cast<Seconds>(tp.time_since_epoch()));
std::string timeString;
timeString.reserve(64);
char *timePtr = &*(timeString.begin());
tm tp_tm = {};
timePtr += strftime(timePtr, timeString.capacity(), "%x %H:%M:%S", localtime_r(&tp_sec, &tp_tm));
snprintf(timePtr, timeString.capacity() - (timePtr - timeString.data()), ".%06" PRIi64, static_cast<int64_t>(now_frac.count()));
return timeString;
}
SystemTimePoint StringToSystemTimePoint(const std::string &timestamp) {
std::tm t{};
strptime(timestamp.c_str(), "%Y-%m-%d %H:%M:%S", &t);
time_t time_t_val = mktime(&t);
SystemTimePoint stp = std::chrono::system_clock::from_time_t(time_t_val);
return stp;
}