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Add bitseqs.bitsLen(openarray)

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Zahary Karadjov 2020-01-29 02:42:50 +02:00
parent f5be0ab63a
commit 50562b515a
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1 changed files with 7 additions and 4 deletions
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11
stew/bitseqs.nim
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@ -24,13 +24,16 @@ type
BitArray*[bits: static int] = object
bytes*: array[(bits + 7) div 8, byte]
func len*(s: BitSeq): int =
func bitsLen*(bytes: openarray[byte]): int =
let
bytesCount = s.Bytes.len
lastByte = s.Bytes[bytesCount - 1]
bytesCount = bytes.len
lastByte = bytes[bytesCount - 1]
markerPos = log2trunc(lastByte)
Bytes(s).len * 8 - (8 - markerPos)
bytesCount * 8 - (8 - markerPos)
template len*(s: BitSeq): int =
bitsLen(Bytes s)
template len*(a: BitArray): int =
a.bits