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SubjectRe: [linux-pm] [PATCH] ACPI: replace strlen("string") with sizeof("string") -1
06.08.2012 18:36, Alan Stern пишет:
> On Mon, 6 Aug 2012, Pavel Machek wrote:
>
>> On Thu 2012-07-26 21:39:38, Len Brown wrote:
>>> ...both give the number of chars in the string
>>> without the '\0', as strncmp() wants,
>>> but sizeof() is compile-time.
>>
>> What about introducing something like streq() to do this
>> automatically? This is ugly....
>>
>> #define streq(a, b) ... if (_buildin_constant(b)) ...
>>
>> ?
>>
>>> - if (!strncmp(val, "enable", strlen("enable"))) {
>>> + if (!strncmp(val, "enable", sizeof("enable") - 1)) {
>
> While you're at it, there's no point using strncmp when you know the
> length of one of the strings beforehand. Just use memcmp, and don't
> subtract 1 from the sizeof value.

http://www.gossamer-threads.com/lists/engine?do=post_attachment;postatt_id=41157;list=linux

:)




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Pavel.
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