From: Jens Kilian <jjk@acm.org>
Date: Tue, 19 May 2009 12:20:54 GMT
Subject: Re: [PATCH 4/3] Introduce 'convert_path_to_git()'
Message-ID: <loom.20090519T120452-71@post.gmane.org>
In-Reply-To: <7vy6sxpn2q.fsf@alter.siamese.dyndns.org>

Junio C Hamano <gitster <at> pobox.com> writes:
> "Ugly" is not quite the word I am looking for.  "My gut feels that there
> has to be a way to write this more cleanly, but I am frustrated that I
> cannot come up with one" might be the word...

How about this:

#include <stdio.h>

#define MAGIC(type)  ((~(type)0 / (type)0xff) << 7)
#define TEST(type) printf(#type " %llx\n", (unsigned long long)MAGIC(type))

int
main(void)
{
/*TEST(unsigned char);  Doesn't work, and I'm too lazy to find out why. */
  TEST(unsigned int);
  TEST(unsigned long);
  TEST(unsigned long long);
  return 0;
}

HTH,
    Jens.