Johannes Schindelin wrote:
> Hi,
>
> On Fri, 14 Aug 2009, Brandon Casey wrote:
>
>> Some compilers produce errors when arithmetic is attempted on pointers to
>> void. So cast to uintptr_t when performing arithmetic on void pointers.
>
> I am confused. Is sizeof(*(uintptr_t)NULL) not larger than 1, and as a
> consequence ((uintptr_t)p)+1 not different from ((void *)p)+1?
If you try this:
printf("NULL + 1: %u\n", (void*)NULL + 1);
the MIPSpro compiler complains like:
The expression must be a pointer to a complete object type.
printf("NULL + 1: %u\n", (void*)NULL + 1);
^
1 error detected in the compilation of "test.c".
Compilers other than gcc at least issue a warning, if they do
not also fail.
-brandon
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