19 lines
573 B
C
19 lines
573 B
C
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#ifndef __LIB_ROUND_H
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#define __LIB_ROUND_H
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/* Yields X rounded up to the nearest multiple of STEP.
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For X >= 0, STEP >= 1 only. */
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#define ROUND_UP(X, STEP) (((X) + (STEP) - 1) / (STEP) * (STEP))
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/* Yields X divided by STEP, rounded up.
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For X >= 0, STEP >= 1 only. */
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#define DIV_ROUND_UP(X, STEP) (((X) + (STEP) - 1) / (STEP))
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/* Yields X rounded down to the nearest multiple of STEP.
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For X >= 0, STEP >= 1 only. */
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#define ROUND_DOWN(X, STEP) ((X) / (STEP) * (STEP))
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/* There is no DIV_ROUND_DOWN. It would be simply X / STEP. */
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#endif /* lib/round.h */
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