20 lines
604 B
C
20 lines
604 B
C
/** bit_for_each64 - iterate over an u64 bits
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* @pos: an int used as current bit
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* @tmp: a temp u64 used as temporary storage
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* @ul: the u64 to loop over
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*
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* Usage:
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* u64 u=139, _t; // u=b10001011
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* int cur;
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* bit_for_each64(cur, _t, u) {
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* printf("%d\n", cur);
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* }
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* This will display the position of each bit in u: 1, 2, 4, 8
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*
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* I should probably re-think the implementation...
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*/
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#define bit_for_each64(pos, tmp, ul) \
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for (tmp = ul, pos = ffs64(tmp); pos; tmp &= (tmp - 1), pos = ffs64(tmp))
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#endif /* BITS_H */
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