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Cleanup ttimes (#8714)

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* Refactor fromWinTime

* Cleanup ttimes
This commit is contained in:
Oscar Nihlgård 2018-08-22 17:20:41 +02:00 • committed by Andreas Rumpf
commit 1d93991929
3 changed files with 75 additions and 151 deletions
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10
lib/pure/times.nim
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@ -423,18 +423,14 @@ proc toUnix*(t: Time): int64 {.benign, tags: [], raises: [], noSideEffect.} =
## Convert ``t`` to a unix timestamp (seconds since ``1970-01-01T00:00:00Z``).
runnableExamples:
doAssert fromUnix(0).toUnix() == 0
t.seconds
proc fromWinTime*(win: int64): Time =
## Convert a Windows file time (100-nanosecond intervals since ``1601-01-01T00:00:00Z``)
## to a ``Time``.
let hnsecsSinceEpoch = (win - epochDiff)
var seconds = hnsecsSinceEpoch div rateDiff
var nanos = ((hnsecsSinceEpoch mod rateDiff) * 100).int
if nanos < 0:
nanos += convert(Seconds, Nanoseconds, 1)
seconds -= 1
const hnsecsPerSec = convert(Seconds, Nanoseconds, 1) div 100
let nanos = floorMod(win, hnsecsPerSec) * 100
let seconds = floorDiv(win - epochDiff, hnsecsPerSec)
result = initTime(seconds, nanos)
proc toWinTime*(t: Time): int64 =