From: Paul Eggert <eggert@cs.ucla.edu>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: bookkeeping to prepare for a 64-bit EMACS_INT on 32-bit hosts
Date: Fri, 29 Apr 2011 23:54:50 -0700 [thread overview]
Message-ID: <4DBBB23A.6050702@cs.ucla.edu> (raw)
In-Reply-To: <4DBA7F87.5040609@cs.ucla.edu>
On 04/29/11 02:06, Paul Eggert wrote:
> I will look into extending that patch, so that it also works with
> __int64.
Here's one way to do that. Add this to nt/config.nt,
after the BITS_PER_LONG definition:
#if (defined __MINGW32__ \
|| 1400 <= _MSC_VER || (1310 <= _MSC_VER && defined _MSC_EXTENSIONS))
/* C99-style long long and "%lld" both work, so use them. */
# define BITS_PER_LONG_LONG 64
#elif 1200 <= _MSC_VER
/* Use pre-C99-style 64-bit integers. */
# define EMACS_INT __int64
# define BITS_PER_EMACS_INT 64
# define pI "I64"
#endif
I inferred the above by looking at random stuff
off the net, and haven't actually tested it; quite possibly
it's not exactly right for Emacs but something like this should work.
Also, I plan to simplify the rats-nest of EMACS_INT ifdefs in lisp.h
to the following. This should make this stuff easier to follow.
#ifndef EMACS_INT
# if BITS_PER_LONG < BITS_PER_LONG_LONG
# define EMACS_INT long long
# define BITS_PER_EMACS_INT BITS_PER_LONG_LONG
# define pI "ll"
# elif BITS_PER_INT < BITS_PER_LONG
# define EMACS_INT long
# define BITS_PER_EMACS_INT BITS_PER_LONG
# define pI "l"
# else
# define EMACS_INT int
# define BITS_PER_EMACS_INT BITS_PER_INT
# define pI ""
# endif
#endif
#ifndef EMACS_UINT
# define EMACS_UINT unsigned EMACS_INT
#endif
next prev parent reply other threads:[~2011-04-30 6:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-29 8:08 bookkeeping to prepare for a 64-bit EMACS_INT on 32-bit hosts Paul Eggert
2011-04-29 8:49 ` Eli Zaretskii
2011-04-29 9:06 ` Paul Eggert
2011-04-29 9:17 ` Eli Zaretskii
2011-04-29 16:04 ` Stefan Monnier
2011-04-29 17:10 ` Eli Zaretskii
2011-04-29 17:32 ` Lars Magne Ingebrigtsen
2011-04-29 17:45 ` Paul Eggert
2011-04-29 18:50 ` David De La Harpe Golden
2011-04-30 5:00 ` Stephen J. Turnbull
2011-04-30 1:37 ` Paul Eggert
2011-05-02 14:46 ` Stefan Monnier
2011-05-02 16:09 ` Paul Eggert
2011-05-02 18:12 ` Stefan Monnier
2011-05-02 19:23 ` Paul Eggert
2011-05-02 19:49 ` Stefan Monnier
2011-04-30 6:54 ` Paul Eggert [this message]
2011-04-30 7:30 ` Eli Zaretskii
2011-04-29 8:56 ` support " Paul Eggert
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