Checking if a string is null
Frits van Bommel
fvbommel at REMwOVExCAPSs.nl
Wed Jul 25 22:50:07 PDT 2007
Derek Parnell wrote:
> On Wed, 25 Jul 2007 14:29:47 +0100, Regan Heath wrote:
>> Aside: If the location and length are identical you can short-circuit
>> the compare, returning true and ignoring the content, this could save a
>> bit of time on comparisons of large arrays.
> I don't think this is such a good idea. How does one address the array of
> four bytes at RAM location 4?
I'm pretty sure the only way to obtain such an array would be to have
already invoked Undefined Behavior (assuming 4 is an invalid memory
location on the platform the program's running on) and as such it
doesn't really matter whether or not two array references to it compare
equal or not...
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