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Rewrite compound_to_time without using i128.

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Jeroen van Rijn
2024-08-20 18:50:05 +02:00
parent d7e81e86f5
commit daa0779c01
1 changed files with 9 additions and 6 deletions
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15
core/time/time.odin
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@@ -932,18 +932,21 @@ as the second return value. See `Time` for the representable range.
compound_to_time :: proc "contextless" (datetime: dt.DateTime) -> (t: Time, ok: bool) {
unix_epoch := dt.DateTime{{1970, 1, 1}, {0, 0, 0, 0}}
delta, err := dt.sub(datetime, unix_epoch)
ok = err == .None
seconds := delta.days * 86_400 + delta.seconds
nanoseconds := i128(seconds) * 1e9 + i128(delta.nanos)
if err != .None {
return
}
seconds := delta.days * 86_400 + delta.seconds
// Can this moment be represented in i64 worth of nanoseconds?
// min(Time): 1677-09-21 00:12:44.145224192 +0000 UTC
// max(Time): 2262-04-11 23:47:16.854775807 +0000 UTC
if nanoseconds < i128(min(i64)) || nanoseconds > i128(max(i64)) {
if seconds < -9223372036 || (seconds == -9223372036 && delta.nanos < -854775808) {
return {}, false
}
return Time{_nsec=i64(nanoseconds)}, true
if seconds > 9223372036 || (seconds == 9223372036 && delta.nanos > 854775807) {
return {}, false
}
return Time{_nsec=seconds * 1e9 + delta.nanos}, true
}
/*