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| author | Loïc Hoguin <[email protected]> | 2025-01-13 13:23:05 +0100 |
|---|---|---|
| committer | Loïc Hoguin <[email protected]> | 2025-01-13 13:23:05 +0100 |
| commit | 4594ab106e15ab9dd000233a620da31ff8da5326 (patch) | |
| tree | e802b45ea6ef6b72a96505de04a852c24996f758 | |
| parent | cdb769a9d33bf9c860f835c44ef445c52d21faae (diff) | |
| download | cowlib-4594ab106e15ab9dd000233a620da31ff8da5326.tar.gz cowlib-4594ab106e15ab9dd000233a620da31ff8da5326.tar.bz2 cowlib-4594ab106e15ab9dd000233a620da31ff8da5326.zip | |
Avoid an extra multiplication before unmasking
This has no real impact on performance
but simplies the code a little.
| -rw-r--r-- | src/cow_ws.erl | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/cow_ws.erl b/src/cow_ws.erl index 08790ca..47c9e89 100644 --- a/src/cow_ws.erl +++ b/src/cow_ws.erl @@ -520,9 +520,9 @@ unmask(Data, MaskKey, 0) -> mask(Data, MaskKey, <<>>); %% We unmask on the fly so we need to continue from the right mask byte. unmask(Data, MaskKey, UnmaskedLen) -> - Left = UnmaskedLen rem 4, - Right = 4 - Left, - MaskKey2 = (MaskKey bsl (Left * 8)) + (MaskKey bsr (Right * 8)), + Left = (UnmaskedLen rem 4) * 8, + Right = 32 - Left, + MaskKey2 = (MaskKey bsl Left) + (MaskKey bsr Right), mask(Data, MaskKey2, <<>>). mask(<< O1:32, O2:32, O3:32, O4:32, Rest/bits >>, MaskKey, Acc) -> |