(unsigned short (*)[4]) ?

[inetd]

What is the meaning of:

(unsigned short (*)[4])

Thanks.

 

[bNasty]

This should be unnamed pointer to an array of 4 unsigned-shorts. Unnamed because this line is probably used for some type-casting.
If you provide few more lines surrounding this one answer could probably be more specific

 

[inetd]

Thanks bNasty, I have the following declaration:

unsigned short (*shrink)[3];

shrink = (unsigned short (*)[3])calloc ((width/4) * (height/4), sizeof *shrink);


What is the meaning of this casting?


Thanks.

 

[Totte]

shrink =
(unsigned short (*)[3]) calloc // Result from calloc is treated as 3 pointers to unsigned short's

((width/4) * (height/4), sizeof *shrink); // This is the calculation of the size to allocate


Totte

 

[bNasty]

Just to add this : type-casting here was necessary because malloc/calloc return generic (void*) pointer, so you need to "translate" it to what ever you need.