[GRASS-dev] The "nature" of size_t

[Wolf Bergenheim]

You probably haven't included <grass/gis.h> which defines a prototype
for G_calloc and friends. The compiler defaults the prototype to signed int.

So be sure you have a #include <grass/gis.h> in your file where you use
G_calloc, to get the prototype for G_calloc, and get rid of your error.

--Wolf

On 27.03.2007 14:07, Damiano Triglione wrote:
> Thanks!
> I presumed it expected a signed integer, because if I invoke it with an
> unisgned int parameter, I have a warning:
>   warning: passing arg 1 of `G_calloc' as signed due to prototype
> 
> even if I did not redefine G_calloc anywhere.
> Thus, do you think that if I declare in my file
>   G_calloc(unsigned int, unsigned int);
> I can then eliminate the warning, instead of using a cast in every
> invocation?
> 
> Damiano
> 
> ----- Original Message ----- From: "Wolf Bergenheim"
> <wolf+grass at bergenheim.net>
> To: "Damiano Triglione" <damiano.triglione at polimi.it>
> Cc: <grass-dev at grass.itc.it>
> Sent: Tuesday, March 27, 2007 12:31 PM
> Subject: Re: [GRASS-dev] The "nature" of size_t
> 
> 
>> What? No it doesn't. How do you figure it expects a signed integer?
>>
>> The definition of G_calloc doesn't have anything to do with how the
>> compiler thinks it is. Have you redefined G_calloc somewhere? If you
>> declare in your own file G_calloc(unsigned int, unsigned int); Then the
>> compiler will think that G_calloc expects two unsigned integers, no
>> matter how it is really in alloc.c, since the compiler will not look in
>> alloc.c when compiling your stuff.
>>
>> --Wolf
>>
>> On 27.03.2007 12:42, Damiano Triglione wrote:
>>> Hi,
>>> I am still trying to understand the "nature" of size_t.
>>> If I am not wrong, it is equivalent to the unsigned integral type of the
>>> result of "sizeof". E.g. in my 32-bit processor PC, it is equal to 4.
>>> But G_calloc() expects - as first argument - a SIGNED (not unsigned)
>>> parameter, even if in alloc.c I find that the first argument of G_calloc
>>> has type size_t !
>>> Can anyone, please, help me tu figure out?
>>> Thanks,
>>> Damiano
>>> _______________________________________________
>>> grass-dev mailing list
>>> grass-dev at grass.itc.it
>>> http://grass.itc.it/mailman/listinfo/grass-dev
>>
>> -- 
>>
>> <:3 )---- Wolf Bergenheim ----( 8:>
>>
> 
> _______________________________________________
> grass-dev mailing list
> grass-dev at grass.itc.it
> http://grass.itc.it/mailman/listinfo/grass-dev

-- 

<:3 )---- Wolf Bergenheim ----( 8:>