[U-Boot] [PATCH 1/4] COMMON: Add __stringify() function
Albert ARIBAUD
albert.u.boot at aribaud.net
Sun Sep 23 19:02:00 CEST 2012
Hi Marek,
On Sun, 23 Sep 2012 17:41:22 +0200, Marek Vasut <marex at denx.de> wrote:
> Copied from Linux kernel:
> commit 8f7c2c37319a81ef4c2bfdec67b1ccd5744d97e4
> Date: Wed Apr 8 16:58:57 2009 +0800
>
> This function converts static number to string in preprocessor.
> This is useful as it allows higher usage of puts() in favour of printf()
Fix commit message: this fonction is not limited to numbers.
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Wolfgang Denk <wd at denx.de>
> ---
> include/common.h | 1 +
> include/linux/stringify.h | 12 ++++++++++++
> 2 files changed, 13 insertions(+), 0 deletions(-)
> create mode 100644 include/linux/stringify.h
>
> diff --git a/include/common.h b/include/common.h
> index 55025c0..9937a57 100644
> --- a/include/common.h
> +++ b/include/common.h
> @@ -39,6 +39,7 @@ typedef volatile unsigned char vu_char;
> #include <linux/bitops.h>
> #include <linux/types.h>
> #include <linux/string.h>
> +#include <linux/stringify.h>
> #include <asm/ptrace.h>
> #include <stdarg.h>
> #if defined(CONFIG_PCI) && (defined(CONFIG_4xx) && !defined(CONFIG_AP1000))
> diff --git a/include/linux/stringify.h b/include/linux/stringify.h
> new file mode 100644
> index 0000000..841cec8
> --- /dev/null
> +++ b/include/linux/stringify.h
> @@ -0,0 +1,12 @@
> +#ifndef __LINUX_STRINGIFY_H
> +#define __LINUX_STRINGIFY_H
> +
> +/* Indirect stringification. Doing two levels allows the parameter to be a
> + * macro itself. For example, compile with -DFOO=bar, __stringify(FOO)
> + * converts to "bar".
> + */
> +
> +#define __stringify_1(x...) #x
> +#define __stringify(x...) __stringify_1(x)
> +
> +#endif /* !__LINUX_STRINGIFY_H */
Amicalement,
--
Albert.
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