From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jens Kilian <jjk@acm.org>
Subject: Re: [PATCH 4/3] Introduce =?utf-8?b?J2NvbnZlcnRfcGF0aF90b19naXQoKSc=?=
Date: Tue, 19 May 2009 12:20:54 +0000 (UTC)
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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.