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chrono.hpp
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chrono.hpp
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#pragma once
#include <nall/function.hpp>
#include <nall/string.hpp>
namespace nall::chrono {
//passage of time functions (from unknown epoch)
inline auto nanosecond() -> uint64_t {
timespec tv;
clock_gettime(CLOCK_MONOTONIC, &tv);
return tv.tv_sec * 1'000'000'000 + tv.tv_nsec;
}
inline auto microsecond() -> uint64_t { return nanosecond() / 1'000; }
inline auto millisecond() -> uint64_t { return nanosecond() / 1'000'000; }
inline auto second() -> uint64_t { return nanosecond() / 1'000'000'000; }
inline auto benchmark(const function<void ()>& f, uint64_t times = 1) -> void {
auto start = nanosecond();
while(times--) f();
auto end = nanosecond();
print("[chrono::benchmark] ", (double)(end - start) / 1'000'000'000.0, "s\n");
}
//exact date/time functions (from system epoch)
struct timeinfo {
timeinfo(
uint year = 0, uint month = 0, uint day = 0,
uint hour = 0, uint minute = 0, uint second = 0, uint weekday = 0
) : year(year), month(month), day(day),
hour(hour), minute(minute), second(second), weekday(weekday) {
}
explicit operator bool() const { return month; }
uint year; //...
uint month; //1 - 12
uint day; //1 - 31
uint hour; //0 - 23
uint minute; //0 - 59
uint second; //0 - 60
uint weekday; //0 - 6
};
inline auto timestamp() -> uint64_t {
return ::time(nullptr);
}
//0 = failure condition
inline auto timestamp(const string& datetime) -> uint64_t {
static const uint monthDays[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
uint64_t timestamp = 0;
if(datetime.match("??????????")) {
return datetime.natural();
}
if(datetime.match("????*")) {
uint year = datetime.slice(0, 4).natural();
if(year < 1970 || year > 2199) return 0;
for(uint y = 1970; y < year && y < 2999; y++) {
uint daysInYear = 365;
if(y % 4 == 0 && (y % 100 != 0 || y % 400 == 0)) daysInYear++;
timestamp += daysInYear * 24 * 60 * 60;
}
}
if(datetime.match("????-??*")) {
uint y = datetime.slice(0, 4).natural();
uint month = datetime.slice(5, 2).natural();
if(month < 1 || month > 12) return 0;
for(uint m = 1; m < month && m < 12; m++) {
uint daysInMonth = monthDays[m - 1];
if(m == 2 && y % 4 == 0 && (y % 100 != 0 || y % 400 == 0)) daysInMonth++;
timestamp += daysInMonth * 24 * 60 * 60;
}
}
if(datetime.match("????-??-??*")) {
uint day = datetime.slice(8, 2).natural();
if(day < 1 || day > 31) return 0;
timestamp += (day - 1) * 24 * 60 * 60;
}
if(datetime.match("????-??-?? ??*")) {
uint hour = datetime.slice(11, 2).natural();
if(hour > 23) return 0;
timestamp += hour * 60 * 60;
}
if(datetime.match("????-??-?? ??:??*")) {
uint minute = datetime.slice(14, 2).natural();
if(minute > 59) return 0;
timestamp += minute * 60;
}
if(datetime.match("????-??-?? ??:??:??*")) {
uint second = datetime.slice(17, 2).natural();
if(second > 59) return 0;
timestamp += second;
}
return timestamp;
}
namespace utc {
inline auto timeinfo(uint64_t time = 0) -> chrono::timeinfo {
auto stamp = time ? (time_t)time : (time_t)timestamp();
auto info = gmtime(&stamp);
return {
(uint)info->tm_year + 1900,
(uint)info->tm_mon + 1,
(uint)info->tm_mday,
(uint)info->tm_hour,
(uint)info->tm_min,
(uint)info->tm_sec,
(uint)info->tm_wday
};
}
inline auto year(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).year, 4, '0'); }
inline auto month(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).month, 2, '0'); }
inline auto day(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).day, 2, '0'); }
inline auto hour(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).hour, 2, '0'); }
inline auto minute(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).minute, 2, '0'); }
inline auto second(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).second, 2, '0'); }
inline auto date(uint64_t timestamp = 0) -> string {
auto t = timeinfo(timestamp);
return {pad(t.year, 4, '0'), "-", pad(t.month, 2, '0'), "-", pad(t.day, 2, '0')};
}
inline auto time(uint64_t timestamp = 0) -> string {
auto t = timeinfo(timestamp);
return {pad(t.hour, 2, '0'), ":", pad(t.minute, 2, '0'), ":", pad(t.second, 2, '0')};
}
inline auto datetime(uint64_t timestamp = 0) -> string {
auto t = timeinfo(timestamp);
return {
pad(t.year, 4, '0'), "-", pad(t.month, 2, '0'), "-", pad(t.day, 2, '0'), " ",
pad(t.hour, 2, '0'), ":", pad(t.minute, 2, '0'), ":", pad(t.second, 2, '0')
};
}
}
namespace local {
inline auto timeinfo(uint64_t time = 0) -> chrono::timeinfo {
auto stamp = time ? (time_t)time : (time_t)timestamp();
auto info = localtime(&stamp);
return {
(uint)info->tm_year + 1900,
(uint)info->tm_mon + 1,
(uint)info->tm_mday,
(uint)info->tm_hour,
(uint)info->tm_min,
(uint)info->tm_sec,
(uint)info->tm_wday
};
}
inline auto year(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).year, 4, '0'); }
inline auto month(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).month, 2, '0'); }
inline auto day(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).day, 2, '0'); }
inline auto hour(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).hour, 2, '0'); }
inline auto minute(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).minute, 2, '0'); }
inline auto second(uint64_t timestamp = 0) -> string { return pad(timeinfo(timestamp).second, 2, '0'); }
inline auto date(uint64_t timestamp = 0) -> string {
auto t = timeinfo(timestamp);
return {pad(t.year, 4, '0'), "-", pad(t.month, 2, '0'), "-", pad(t.day, 2, '0')};
}
inline auto time(uint64_t timestamp = 0) -> string {
auto t = timeinfo(timestamp);
return {pad(t.hour, 2, '0'), ":", pad(t.minute, 2, '0'), ":", pad(t.second, 2, '0')};
}
inline auto datetime(uint64_t timestamp = 0) -> string {
auto t = timeinfo(timestamp);
return {
pad(t.year, 4, '0'), "-", pad(t.month, 2, '0'), "-", pad(t.day, 2, '0'), " ",
pad(t.hour, 2, '0'), ":", pad(t.minute, 2, '0'), ":", pad(t.second, 2, '0')
};
}
}
}