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I use the convention "size = number of bytes" (as in sizeof), "count = number of elements" and so my sizeof(x)/sizeof(x[0]) macro is actually called COUNT.

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In the BSDs (and some other code bases) the macro is spelled nitems and is common enough to be considered idiomatic.

Thank you. I did not know about this, I've been using the long version. nitems is defined in sys/param.h in OpenBSD and FreeBSD in case anyone is interested.

I always call my version lengthof() to match sizeof.

I use lengthof for lengths of string literals.

I always call mine "countof" to match the "sizeof" naming convention.

https://msdn.microsoft.com/en-us/library/ms175773.aspx - although I'm not sure it's a macro. The nice thing is it's detecting that you actually give it an array.

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