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ba0f3/bitwise.nim

Created May 5, 2015 10:54
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bitwise.nim
proc testBit(w, i: int): bool {.inline.} =
result = (w and (1 shl (i %% (8*sizeof(int))))) != 0
proc setBit(w: var int, i: int) {.inline.} =
w = w or (1 shl (i %% (8*sizeof(int))))
proc resetBit(w: var int, i: int) {.inline.} =
w = w and not (1 shl (i %% (8*sizeof(int))))
when isMainModule:
var x = 0x3
for i in 0..sizeof(x):
echo x.testBit(i)
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