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20 lines
620 B
C
20 lines
620 B
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef LABWC_ARRAY_SIZE_H
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#define LABWC_ARRAY_SIZE_H
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/**
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* ARRAY_SIZE() - Get the number of elements in array.
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* @arr: array to be sized
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*
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* This does not work on pointers.
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*
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* Recent versions of GCC and clang support -Werror=sizeof-pointer-div
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* and thus avoids using constructs such as:
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*
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* #define same_type(a, b) (__builtin_types_compatible_p(typeof(a), typeof(b)) == 1)
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* #define ARRAY_SIZE(a) ({ static_assert(!same_type(a, &(a)[0])); sizeof(a) / sizeof(a[0]); })
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*/
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#endif /* LABWC_ARRAY_SIZE_H */
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