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add bits.toggle() and bits.switch()

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mfranz 2008-10-22 20:56:22 +00:00
parent 80215e0731
commit 464d9d3f75
1 changed files with 9 additions and 0 deletions
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9
Nasal/bits.nas
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@ -29,3 +29,12 @@ var set = func(n, b) test(n, b) ? n : n + bit[b];
# returns number <n> with bit <b> cleared
var clear = func(n, b) test(n, b) ? n - bit[b] : n;
# returns number <n> with bit <b> toggled
var toggle = func(n, b) test(n, b) ? n - bit[b] : n + bit[b];
# returns number <n> with bit <b> set to value <v>
var switch = func(n, b, v) n - (test(n, b) - !!v) * bit[b];