~ociaw/RandN commit - sourcehut hg

90c6f2d5a313 — Michael Johnson 2 years ago

Fix arithmetic overflow exception when reading ChaCha position

patch browse

1 files changed, 1 insertions(+), 1 deletions(-)

M src/RandN/Rngs/ChaCha.cs

M src/RandN/Rngs/ChaCha.cs +1 -1

@@ 37,7 37,7 @@ namespace RandN.Rngs
             // bits of the counter to the word index, so that it becomes 6 bits.
             get
             {
-                var block = (_blockBuffer.BlockCounter << 2) + (UInt64)(_blockBuffer.Index >> 4);
+                var block = unchecked((_blockBuffer.BlockCounter << 2) + (UInt64)(_blockBuffer.Index >> 4));
                 var word = (UInt32)(_blockBuffer.Index & 0b1111);
                 return new Counter(block, word);
             }