19 lines
545 B
V
19 lines
545 B
V
module time
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// portable_timegm does the same as C._mkgmtime, but unlike it,
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// can work with dates before the Unix epoch of 1970-01-01 .
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pub fn portable_timegm(t &C.tm) i64 {
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mut year := t.tm_year + 1900
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mut month := t.tm_mon // 0-11
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if month > 11 {
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year += month / 12
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month %= 12
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} else if month < 0 {
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years_diff := (11 - month) / 12
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year -= years_diff
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month += 12 * years_diff
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}
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days_since_1970 := i64(days_from_civil(year, month + 1, t.tm_mday))
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return 60 * (60 * (24 * days_since_1970 + t.tm_hour) + t.tm_min) + t.tm_sec
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}
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