Weird segmentation fault error

[David Gillies]

It's a good idea from a point of code readability as well to
explicitly cast NULL pointers to the correct type.

On Tue, Jan 10, 2012 at 8:01 AM, Vincent Lefevre <vincent at vinc17.net> wrote:
> On 2012-01-10 14:09:43 +0100, Paul Zimmermann wrote:
>> > Could somebody point out the reason for the segfault error?
>>
>>  -- Function: void mpf_inits (mpf_t X, ...)
>>      Initialize a NULL-terminated list of `mpf_t' variables, and set
>>                   ^^^^^^^^^^^^^^^
>
> Warning! NULL is not sufficient. For instance,
>
> #define NULL 0
>
> is a valid definition, and if int is on 32 bits and pointers are
> on 64 bits, you may have problems. Since the C standard also allows
> the implementation to have different representations for pointers to
> different types, it is safer to use a null pointer with the pointer
> to mpf_t type.
>
> --
> Vincent Lefèvre <vincent at vinc17.net> - Web: <http://www.vinc17.net/>
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> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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-- 
David Gillies
San Jose
Costa Rica