melib/datetime: convert date to utc before converting to unix epoch
parent
86d8419ce7
commit
6835968d9a
GPG Key ID:
73627C2F690DF710
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@ -74,25 +74,165 @@ pub fn timestamp_to_string(timestamp: UnixTimestamp, fmt: Option<&str>) -> Strin
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s.to_string_lossy().to_string()
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}
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fn tm_to_secs(tm: ::libc::tm) -> UnixTimestamp {
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let mut is_leap = false;
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let mut year = tm.tm_year;
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let mut month = tm.tm_mon;
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if month >= 12 || month < 0 {
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let mut adj = month / 12;
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month %= 12;
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if month < 0 {
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adj -= 1;
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month += 12;
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}
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year += adj;
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}
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let mut t = year_to_secs(year as u64, &mut is_leap);
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t += month_to_secs(month as usize, is_leap);
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t += 86400 * (tm.tm_mday as u64 - 1);
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t += 3600 * (tm.tm_hour as u64);
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t += 60 * (tm.tm_min as u64);
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t += tm.tm_sec as u64;
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t
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}
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fn year_to_secs(year: u64, is_leap: &mut bool) -> u64 {
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if year < 100 {
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/* Sorry time travelers. */
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return 0;
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}
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if year - 2 <= 136 {
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let y = year;
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let mut leaps = (y - 68) >> 2;
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if (y - 68) & 3 == 0 {
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leaps -= 1;
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*is_leap = true;
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} else {
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*is_leap = false;
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}
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return 31536000 * (y - 70) + 86400 * leaps;
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}
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let cycles = (year - 100) / 400;
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let centuries;
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let mut leaps;
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let mut rem;
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rem = (year - 100) % 400;
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if rem == 0 {
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*is_leap = true;
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centuries = 0;
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leaps = 0;
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} else {
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if rem >= 200 {
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if rem >= 300 {
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centuries = 3;
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rem -= 300;
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} else {
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centuries = 2;
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rem -= 200;
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}
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} else {
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if rem >= 100 {
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centuries = 1;
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rem -= 100;
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} else {
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centuries = 0;
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}
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}
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if rem == 0 {
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*is_leap = false;
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leaps = 0;
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} else {
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leaps = rem / 4;
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rem %= 4;
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*is_leap = rem == 0;
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}
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}
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leaps += 97 * cycles + 24 * centuries - if *is_leap { 1 } else { 0 };
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return (year - 100) * 31536000 + leaps * 86400 + 946684800 + 86400;
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}
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fn month_to_secs(month: usize, is_leap: bool) -> u64 {
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const SECS_THROUGH_MONTH: [u64; 12] = [
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0,
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31 * 86400,
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59 * 86400,
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90 * 86400,
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120 * 86400,
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151 * 86400,
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181 * 86400,
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212 * 86400,
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243 * 86400,
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273 * 86400,
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304 * 86400,
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334 * 86400,
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];
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let mut t = SECS_THROUGH_MONTH[month as usize];
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if is_leap && month >= 2 {
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t += 86400;
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}
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return t;
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}
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pub fn rfc822_to_timestamp<T>(s: T) -> UnixTimestamp
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where
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T: Into<Vec<u8>>,
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{
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let s = CString::new(s).unwrap();
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let mut new_tm: ::libc::tm = unsafe { std::mem::zeroed() };
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unsafe {
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let fmt = CStr::from_bytes_with_nul_unchecked(b"%a, %e %h %Y %H:%M:%S %z\0");
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let ret = strptime(
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CString::new(s).unwrap().as_ptr(),
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fmt.as_ptr(),
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&mut new_tm as *mut _,
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);
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if ret.is_null() {
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return 0;
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for fmt in &[
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&b"%a, %e %h %Y %H:%M:%S \0"[..],
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&b"%e %h %Y %H:%M:%S \0"[..],
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] {
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unsafe {
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let fmt = CStr::from_bytes_with_nul_unchecked(fmt);
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let ret = strptime(s.as_ptr(), fmt.as_ptr(), &mut new_tm as *mut _);
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if ret.is_null() {
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continue;
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}
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let rest = CStr::from_ptr(ret);
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let tm_gmtoff = if rest.to_bytes().len() > 4
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&& rest.to_bytes().is_ascii()
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&& rest.to_bytes()[1..5].iter().all(u8::is_ascii_digit)
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{
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let offset = std::str::from_utf8_unchecked(&rest.to_bytes()[0..5]);
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if let (Ok(mut hr_offset), Ok(mut min_offset)) =
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(offset[1..3].parse::<i64>(), offset[3..5].parse::<i64>())
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{
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if rest.to_bytes()[0] == b'-' {
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hr_offset = -hr_offset;
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min_offset = -min_offset;
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}
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hr_offset * 60 * 60 + min_offset * 60
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} else {
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0
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}
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} else {
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let rest = if rest.to_bytes().starts_with(b"(") && rest.to_bytes().ends_with(b")") {
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&rest.to_bytes()[1..rest.to_bytes().len() - 1]
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} else {
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rest.to_bytes()
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};
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if let Ok(idx) = TIMEZONE_ABBR.binary_search_by(|probe| probe.0.cmp(rest)) {
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let (hr_offset, min_offset) = debug!(TIMEZONE_ABBR[idx]).1;
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(hr_offset as i64) * 60 * 60 + (min_offset as i64) * 60
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} else {
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0
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}
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};
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return (tm_to_secs(new_tm) as i64 - tm_gmtoff) as u64;
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}
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return mktime(&new_tm as *const _) as u64;
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}
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return 0;
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}
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// FIXME: Handle non-local timezone?
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pub fn timestamp_from_string<T>(s: T, fmt: &str) -> Option<UnixTimestamp>
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where
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T: Into<Vec<u8>>,
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@ -127,5 +267,301 @@ pub fn now() -> UnixTimestamp {
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#[test]
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fn test_timestamp() {
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timestamp_to_string(0);
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timestamp_to_string(0, None);
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}
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#[test]
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fn test_rfcs() {
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/* Some tests were lazily stolen from https://rachelbythebay.com/w/2013/06/11/time/ */
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assert_eq!(
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rfc822_to_timestamp("Wed, 8 Jan 2020 10:44:03 -0800"),
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1578509043
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);
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/*
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macro_rules! mkt {
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($year:literal, $month:literal, $day:literal, $hour:literal, $minute:literal, $second:literal) => {
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::libc::tm {
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tm_sec: $second,
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tm_min: $minute,
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tm_hour: $hour,
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tm_mday: $day,
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tm_mon: $month - 1,
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tm_year: $year - 1900,
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tm_wday: 0,
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tm_yday: 0,
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tm_isdst: 0,
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tm_gmtoff: 0,
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tm_zone: std::ptr::null(),
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}
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};
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}
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*/
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//unsafe { __tm_to_secs(&mkt!(2009, 02, 13, 23, 31, 30) as *const _) },
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assert_eq!(
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rfc822_to_timestamp("Fri, 13 Feb 2009 15:31:30 -0800"),
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1234567890
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);
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//unsafe { __tm_to_secs(&mkt!(2931, 05, 05, 00, 33, 09) as *const _) },
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assert_eq!(
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rfc822_to_timestamp("Sat, 05 May 2931 00:33:09 +0000"),
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30336942789
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);
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//2214-11-06 20:05:12 = 7726651512 [OK]
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assert_eq!(
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rfc822_to_timestamp("Sun, 06 Nov 2214 17:05:12 -0300"), //2214-11-06 20:05:12
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7726651512
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);
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assert_eq!(
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rfc822_to_timestamp("Sun, 06 Nov 2214 17:05:12 -0300"), //2214-11-06 20:05:12
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rfc822_to_timestamp("Sun, 06 Nov 2214 17:05:12 (ADT)"), //2214-11-06 20:05:12
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);
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//2661-11-06 06:38:02 = 21832612682 [OK]
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assert_eq!(
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rfc822_to_timestamp("Wed, 06 Nov 2661 06:38:02 +0000"), //2661-11-06 06:38:02
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21832612682
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);
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//2508-12-09 04:27:08 = 17007251228 [OK]
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assert_eq!(
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rfc822_to_timestamp("Sun, 09 Dec 2508 04:27:08 +0000"), //2508-12-09 04:27:08
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17007251228
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);
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//2375-11-07 05:08:24 = 12807349704 [OK]
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assert_eq!(
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rfc822_to_timestamp("Fri, 07 Nov 2375 05:08:24 +0000"), //2375-11-07 05:08:24
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12807349704
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);
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//2832-09-03 02:46:10 = 27223353970 [OK]
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assert_eq!(
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rfc822_to_timestamp("Fri, 03 Sep 2832 02:46:10 +0000"), //2832-09-03 02:46:10
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27223353970
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);
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//2983-02-25 12:47:17 = 31972020437 [OK]
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assert_eq!(
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rfc822_to_timestamp("Tue, 25 Feb 2983 15:47:17 +0300"), //2983-02-25 12:47:17
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31972020437
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);
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assert_eq!(
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rfc822_to_timestamp("Thu, 30 Mar 2017 17:32:06 +0300 (EEST)"),
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1490884326
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);
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assert_eq!(
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rfc822_to_timestamp("Mon, 24 Apr 2017 17:36:34 +0530"),
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1493035594
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);
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assert_eq!(
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rfc822_to_timestamp("Mon, 24 Apr 2017 17:36:34 +0530"),
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rfc822_to_timestamp("Mon, 24 Apr 2017 12:06:34 +0000"),
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);
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assert_eq!(
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rfc822_to_timestamp("Mon, 24 Apr 2017 17:36:34 +0530"),
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rfc822_to_timestamp("Mon, 24 Apr 2017 17:36:34 (SLST)"),
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);
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assert_eq!(
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rfc822_to_timestamp("Mon, 24 Apr 2017 17:36:34 +0530"),
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rfc822_to_timestamp("Mon, 24 Apr 2017 17:36:34 SLST"),
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);
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assert_eq!(
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rfc822_to_timestamp("27 Dec 2019 14:42:46 +0100"),
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1577454166
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);
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}
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const TIMEZONE_ABBR: &'static [(&'static [u8], (i8, i8))] = &[
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(b"ACDT", (10, 30)),
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(b"ACST", (09, 30)),
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(b"ACT", (-05, 0)),
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(b"ACWST", (08, 45)),
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(b"ADT", (-03, 0)),
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(b"AEDT", (11, 0)),
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(b"AEST", (10, 0)),
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(b"AFT", (04, 30)),
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(b"AKDT", (-08, 0)),
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(b"AKST", (-09, 0)),
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(b"ALMT", (06, 0)),
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(b"AMST", (-03, 0)),
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(b"AMT", (-04, 0)), /* Amazon Time */
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(b"ANAT", (12, 0)),
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(b"AQTT", (05, 0)),
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(b"ART", (-03, 0)),
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(b"AST", (-04, 0)),
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(b"AST", (03, 0)),
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(b"AWST", (08, 0)),
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(b"AZOST", (0, 0)),
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(b"AZOT", (-01, 0)),
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(b"AZT", (04, 0)),
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(b"BDT", (08, 0)),
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(b"BIOT", (06, 0)),
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(b"BIT", (-12, 0)),
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(b"BOT", (-04, 0)),
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(b"BRST", (-02, 0)),
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(b"BRT", (-03, 0)),
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(b"BST", (06, 0)),
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(b"BTT", (06, 0)),
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(b"CAT", (02, 0)),
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(b"CCT", (06, 30)),
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(b"CDT", (-05, 0)),
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(b"CEST", (02, 0)),
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(b"CET", (01, 0)),
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(b"CHADT", (13, 45)),
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(b"CHAST", (12, 45)),
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(b"CHOST", (09, 0)),
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(b"CHOT", (08, 0)),
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(b"CHST", (10, 0)),
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(b"CHUT", (10, 0)),
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(b"CIST", (-08, 0)),
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(b"CIT", (08, 0)),
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(b"CKT", (-10, 0)),
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(b"CLST", (-03, 0)),
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(b"CLT", (-04, 0)),
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(b"COST", (-04, 0)),
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(b"COT", (-05, 0)),
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(b"CST", (-06, 0)),
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(b"CT", (08, 0)),
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(b"CVT", (-01, 0)),
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(b"CWST", (08, 45)),
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(b"CXT", (07, 0)),
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(b"DAVT", (07, 0)),
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(b"DDUT", (10, 0)),
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(b"DFT", (01, 0)),
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(b"EASST", (-05, 0)),
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(b"EAST", (-06, 0)),
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(b"EAT", (03, 0)),
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(b"ECT", (-05, 0)),
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(b"EDT", (-04, 0)),
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(b"EEST", (03, 0)),
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(b"EET", (02, 0)),
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(b"EGST", (0, 0)),
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(b"EGT", (-01, 0)),
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(b"EIT", (09, 0)),
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(b"EST", (-05, 0)),
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(b"FET", (03, 0)),
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(b"FJT", (12, 0)),
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(b"FKST", (-03, 0)),
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(b"FKT", (-04, 0)),
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(b"FNT", (-02, 0)),
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(b"GALT", (-06, 0)),
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(b"GAMT", (-09, 0)),
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(b"GET", (04, 0)),
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(b"GFT", (-03, 0)),
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(b"GILT", (12, 0)),
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(b"GIT", (-09, 0)),
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(b"GMT", (0, 0)),
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(b"GST", (04, 0)),
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(b"GYT", (-04, 0)),
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(b"HAEC", (02, 0)),
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(b"HDT", (-09, 0)),
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(b"HKT", (08, 0)),
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(b"HMT", (05, 0)),
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(b"HOVST", (08, 0)),
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(b"HOVT", (07, 0)),
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(b"HST", (-10, 0)),
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(b"ICT", (07, 0)),
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(b"IDLW", (-12, 0)),
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(b"IDT", (03, 0)),
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(b"IOT", (03, 0)),
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(b"IRDT", (04, 30)),
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(b"IRKT", (08, 0)),
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(b"IRST", (03, 30)),
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(b"IST", (05, 30)),
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(b"JST", (09, 0)),
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(b"KALT", (02, 0)),
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(b"KGT", (06, 0)),
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(b"KOST", (11, 0)),
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(b"KRAT", (07, 0)),
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(b"KST", (09, 0)),
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(b"LHST", (10, 30)),
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(b"LINT", (14, 0)),
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(b"MAGT", (12, 0)),
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(b"MART", (-09, -30)),
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(b"MAWT", (05, 0)),
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(b"MDT", (-06, 0)),
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(b"MEST", (02, 0)),
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(b"MET", (01, 0)),
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(b"MHT", (12, 0)),
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(b"MIST", (11, 0)),
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(b"MIT", (-09, -30)),
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(b"MMT", (06, 30)),
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(b"MSK", (03, 0)),
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(b"MST", (08, 0)),
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(b"MUT", (04, 0)),
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(b"MVT", (05, 0)),
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(b"MYT", (08, 0)),
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(b"NCT", (11, 0)),
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(b"NDT", (-02, -30)),
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(b"NFT", (11, 0)),
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(b"NOVT", (07, 0)),
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(b"NPT", (05, 45)),
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(b"NST", (-03, -30)),
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(b"NT", (-03, -30)),
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(b"NUT", (-11, 0)),
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(b"NZDT", (13, 0)),
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(b"NZST", (12, 0)),
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(b"OMST", (06, 0)),
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(b"ORAT", (05, 0)),
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(b"PDT", (-07, 0)),
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(b"PET", (-05, 0)),
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(b"PETT", (12, 0)),
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(b"PGT", (10, 0)),
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(b"PHOT", (13, 0)),
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(b"PHT", (08, 0)),
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(b"PKT", (05, 0)),
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(b"PMDT", (-02, 0)),
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(b"PMST", (-03, 0)),
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(b"PONT", (11, 0)),
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(b"PST", (-08, 0)),
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(b"PST", (08, 0)),
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(b"PYST", (-03, 0)),
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(b"PYT", (-04, 0)),
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(b"RET", (04, 0)),
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(b"ROTT", (-03, 0)),
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(b"SAKT", (11, 0)),
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(b"SAMT", (04, 0)),
|
||||
(b"SAST", (02, 0)),
|
||||
(b"SBT", (11, 0)),
|
||||
(b"SCT", (04, 0)),
|
||||
(b"SDT", (-10, 0)),
|
||||
(b"SGT", (08, 0)),
|
||||
(b"SLST", (05, 30)),
|
||||
(b"SRET", (11, 0)),
|
||||
(b"SRT", (-03, 0)),
|
||||
(b"SST", (08, 0)),
|
||||
(b"SYOT", (03, 0)),
|
||||
(b"TAHT", (-10, 0)),
|
||||
(b"TFT", (05, 0)),
|
||||
(b"THA", (07, 0)),
|
||||
(b"TJT", (05, 0)),
|
||||
(b"TKT", (13, 0)),
|
||||
(b"TLT", (09, 0)),
|
||||
(b"TMT", (05, 0)),
|
||||
(b"TOT", (13, 0)),
|
||||
(b"TRT", (03, 0)),
|
||||
(b"TVT", (12, 0)),
|
||||
(b"ULAST", (09, 0)),
|
||||
(b"ULAT", (08, 0)),
|
||||
(b"UTC", (0, 0)),
|
||||
(b"UYST", (-02, 0)),
|
||||
(b"UYT", (-03, 0)),
|
||||
(b"UZT", (05, 0)),
|
||||
(b"VET", (-04, 0)),
|
||||
(b"VLAT", (10, 0)),
|
||||
(b"VOLT", (04, 0)),
|
||||
(b"VOST", (06, 0)),
|
||||
(b"VUT", (11, 0)),
|
||||
(b"WAKT", (12, 0)),
|
||||
(b"WAST", (02, 0)),
|
||||
(b"WAT", (01, 0)),
|
||||
(b"WEST", (01, 0)),
|
||||
(b"WET", (0, 0)),
|
||||
(b"WIT", (07, 0)),
|
||||
(b"WST", (08, 0)),
|
||||
(b"YAKT", (09, 0)),
|
||||
(b"YEKT", (05, 0)),
|
||||
];
|
||||
|
|
|
|||
Loading…
Reference in New Issue