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Add WIDTHOF() to get the width in bits

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It is common to use the expression 'sizeof(x) * CHAR_BIT' to mean the
width in bits of a type or object.  Now that there are _WIDTH macros for
some types, indicating the number of bits that they use, it makes sense
to wrap this calculation in a macro of a similar name.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
This commit is contained in:
Alejandro Colomar 2023-01-18 12:38:18 +01:00 committed by Serge Hallyn
parent 1db190cb66
commit 3f90eff494
1 changed files with 1 additions and 0 deletions
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lib/defines.h
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@ -169,6 +169,7 @@ static inline void memzero(void *ptr, size_t size)
#define SCALE DAY #define SCALE DAY
#endif #endif
#define WIDTHOF(x) (sizeof(x) * CHAR_BIT)
#define NITEMS(arr) (sizeof((arr)) / sizeof((arr)[0])) #define NITEMS(arr) (sizeof((arr)) / sizeof((arr)[0]))
/* Copy string pointed by B to array A with size checking. It was originally /* Copy string pointed by B to array A with size checking. It was originally