Alessandro Rubini wrote:
>>> +#define SMC_insb(r,b,l) ({ int __i ; \
>>> + byte *__b2; \
>>> + __b2 = (byte *) b; \
>>> + for (__i = 0; __i < l; __i++) { \
>>> + *(__b2 + __i) = SMC_inb(r); \
>>> + SMC_inb(0); \
>>> + }; \
>>> + })
>>>
>
>
>> [...] it's generally considered good form to wrap multi-line macros with
>> do {...} while(0) in order to avoid compiler issues.
>>
>
> But this is the "expression statement" gcc slang. the do/while0 thing
> avoids if/else problems but isn't an expression, it is a statement.
> This has no issue with if/else (no trailing semicolon or brace) and
> moreover it is an expression.
>
>
Oh, I see. Thanks for taking the time Alessandro. I'm putting this
back on list so others can be educated too.
regards,
Ben
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