[RFC][PATCH v2] Add reallocarray function.

[Joseph S. Myers]

On Sun, 18 May 2014, Rüdiger Sonderfeld wrote:

> diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
> index 00329a2..b75c28f 100644
> --- a/stdlib/stdlib.h
> +++ b/stdlib/stdlib.h
> @@ -479,6 +479,13 @@ extern void *calloc (size_t __nmemb, size_t __size)
>     between objects pointed by the old and new pointers.  */
>  extern void *realloc (void *__ptr, size_t __size)
>       __THROW __attribute_warn_unused_result__;
> +/* Re-allocate the previously allocated block in PTR, making the new
> +   block large enough for NMEMB elements of SIZE bytes each.  */
> +/* __attribute_malloc__ is not used, because if realloc returns
> +   the same pointer that was passed to it, aliasing needs to be allowed
> +   between objects pointed by the old and new pointers.  */
> +extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
> +     __THROW __attribute_warn_unused_result__;

How has this patch been tested?  This function declaration needs 
conditioning on __USE_GNU, as no standard includes this function in 
<stdlib.h>; I'd have expected you to get failures of the conform/ tests 
for stdlib.h when you ran the testsuite.

-- 
Joseph S. Myers
joseph@codesourcery.com