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Re: [PATCH] block-sha1/sha1.c: silence compiler complaints by casting void* to uintptr_t

From
Johannes Schindelin <johannes.schindelin@gmx.de>
Date
Aug 15, 2009, 00:08 UTC
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

Previous: Brandon CaseyNext: Linus Torvalds
Message 8 of 15 in “block-sha1: more good unaligned memory access candidates”
  1. block-sha1: more good unaligned memory access candidatesNicolas Pitre, Aug 13, 2009
  2. Linus TorvaldsAug 13, 2009
  3. Nicolas PitreAug 13, 2009
  4. Junio C HamanoAug 13, 2009
  5. Linus TorvaldsAug 13, 2009
  6. Nicolas PitreAug 13, 2009
  7. block-sha1/sha1.c: silence compiler complaints by casting void* to uintptr_tBrandon Casey, Aug 14, 2009
  8. Johannes SchindelinAug 15, 2009
  9. Linus TorvaldsAug 15, 2009
  10. Brandon CaseyAug 15, 2009
  11. Junio C HamanoAug 15, 2009
  12. Brandon CaseyAug 15, 2009
  13. Junio C HamanoAug 15, 2009
  14. Linus TorvaldsAug 15, 2009
  15. Brandon CaseyAug 15, 2009

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