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38 lines
629 B
C
38 lines
629 B
C
#include <assert.h>
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#define BIT_DEL(x, n) ((x) &= ~(1<<(n)))
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#define BIT_SET(x, n) ((x) |= (1<<(n)))
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#define BIT_TOGGLE(x, n) ((x) ^= (1<<(n)))
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int main() {
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int foo;
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foo = 42;
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/* Delete bit 5 */
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BIT_DEL(foo, 5);
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assert(foo == 10);
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BIT_DEL(foo, 5);
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assert(foo == 10);
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/* Set bit 5 again */
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BIT_SET(foo, 5);
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assert(foo == 42);
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BIT_SET(foo, 5);
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assert(foo == 42);
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/* Set bit 0 */
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BIT_SET(foo, 0);
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assert(foo == 43);
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/* Delete bit 0 */
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BIT_DEL(foo, 0);
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assert(foo == 42);
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/* Toggle bit 5 */
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BIT_TOGGLE(foo, 5);
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assert(foo == 10);
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BIT_TOGGLE(foo, 5);
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assert(foo == 42);
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}
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