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 */
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 */
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#ifndef LIBC_ALIGN_H_
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#ifndef LIBC_ALIGN_H_
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#define LIBC_ALIGN_H_
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#define LIBC_ALIGN_H_
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/** Align to the nearest lower address.
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/** Align to the nearest lower address which is a power of two.
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 *
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 *
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 * @param s Address or size to be aligned.
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 * @param s     Address or size to be aligned.
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 * @param a Size of alignment, must be power of 2.
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 * @param a     Size of alignment, must be power of 2.
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 */
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 */
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#define ALIGN_DOWN(s, a)    ((s) & ~((a) - 1))
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#define ALIGN_DOWN(s, a)    ((s) & ~((a) - 1))
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/** Align to the nearest higher address.
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/** Align to the nearest higher address which is a power of two.
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 *
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 *
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 * @param s Address or size to be aligned.
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 * @param s     Address or size to be aligned.
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 * @param a Size of alignment, must be power of 2.
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 * @param a     Size of alignment, must be power of 2.
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 */
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 */
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#define ALIGN_UP(s, a)      ((long)((s) + ((a) - 1)) & ~((long) (a) - 1))
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#define ALIGN_UP(s, a)      ((long)((s) + ((a) - 1)) & ~((long) (a) - 1))
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/** Round up to the nearest higher boundary.
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 *
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 * @param n     Number to be aligned.
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 * @param b     Boundary, arbitrary unsigned number.
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 */
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#define ROUND_UP(n, b)      (((n) / (b) + ((n) % (b) != 0)) * (b))
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */