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Mamy Ratsimbazafy 2022-02-28 14:04:22 +01:00 committed by GitHub
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commit 597dcb39aa
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constantine/math/io/io_bigints.nim
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@ -325,7 +325,7 @@ func readHexChar(c: char): SecretWord {.inline.}=
var val = c - sw'0'
val = val xor ((val xor (c - sw('a') + sw(10))) and lowercaseMask)
val = val xor ((val xor (c - sw('a') + sw(10))) and uppercaseMask)
val = val xor ((val xor (c - sw('A') + sw(10))) and uppercaseMask)
val = val and sw(0xF) # Prevent overflow of invalid inputs
return val