From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Sat, 15 Aug 2009 00:08:45 GMT
Subject: Re: [PATCH] block-sha1/sha1.c: silence compiler complaints by casting void* to uintptr_t
Message-ID: <alpine.DEB.1.00.0908150207270.8306@pacific.mpi-cbg.de>
In-Reply-To: <_-0l9qI_nKm-VVtKlL5hzen4bhcyRmiZ1z4jSmKK1LwECXueziRDzSTyacEehOkoqsfYIaEUlds@cipher.nrlssc.navy.mil>

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?

Ciao,
Dscho