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Message-ID: <4A5B3CB0.7070604@codemonkey.ws>
Date: Mon, 13 Jul 2009 08:54:56 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH 2/7] add strify() macros.
References: <1247478048-17257-1-git-send-email-kraxel@redhat.com>
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: qemu-devel@nongnu.org, Paul Brook <paul@codesourcery.com>

Gerd Hoffmann wrote:
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  osdep.h |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/osdep.h b/osdep.h
> index ffbf221..ac660c8 100644
> --- a/osdep.h
> +++ b/osdep.h
> @@ -27,6 +27,11 @@
>  #define unlikely(x)   __builtin_expect(!!(x), 0)
>  #endif
>  
> +#ifndef strify
> +#define strify_i(a) # a
> +#define strify(a) strify_i(a)
> +#endif
> +
>   

Could get even fancier with something like:

#define strify_i(a) # a
#define strify(a) strify_i(a)

#define to_prop(a) __builtin_choose_expr( \
    __builtin_types_compatible_p(typeof(a), const char []), \
   (a), \
   __builtin_choose_expr( \
        __builtin_types_compatible_p(typeof(a), int) || \
        __builtin_types_compatible_p(typeof(a), double), \
        strify(a), \
        (int *)0))

It should be possible to use to_prop() for any property initializer.

Regards,

Anthony Liguori