netdev - Re: [PATCH] lib, net: make isodigit public and use it

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Date:	Wed, 10 Apr 2013 16:03:24 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Denis Kirjanov <kda@...ux-powerpc.org>
Cc:	Jason Baron <jbaron@...hat.com>, netdev@...r.kernel.org,
	Trond Myklebust <Trond.Myklebust@...app.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] lib, net: make isodigit public and use it

On Wed, 2013-04-10 at 16:43 +0400, Denis Kirjanov wrote: 
> what about #define isoctal(c) (((c) & ~7) ?

Few reasons why not:
- the name isodigit is used already
- above name is more logical to existing isdigit & isxdigit
- macro is usually worse than inline function
- your implementation is not strict to octal digits

> 
> On 4/10/13, Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:
> > There are at least two users of isodigit. Let's make it a public function
> > of
> > ctype.h.
> >
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> > ---
> >  include/linux/ctype.h | 6 ++++++
> >  lib/dynamic_debug.c   | 1 -
> >  net/sunrpc/cache.c    | 1 -
> >  3 files changed, 6 insertions(+), 2 deletions(-)
> >
> > diff --git a/include/linux/ctype.h b/include/linux/ctype.h
> > index 8acfe31..653589e 100644
> > --- a/include/linux/ctype.h
> > +++ b/include/linux/ctype.h
> > @@ -61,4 +61,10 @@ static inline char _tolower(const char c)
> >  	return c | 0x20;
> >  }
> >
> > +/* Fast check for octal digit */
> > +static inline int isodigit(const char c)
> > +{
> > +	return c >= '0' && c <= '7';
> > +}
> > +
> >  #endif
> > diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
> > index 5276b99..4603245 100644
> > --- a/lib/dynamic_debug.c
> > +++ b/lib/dynamic_debug.c
> > @@ -281,7 +281,6 @@ static inline int parse_lineno(const char *str, unsigned
> > int *val)
> >   * allow the user to express a query which matches a format
> >   * containing embedded spaces.
> >   */
> > -#define isodigit(c)		((c) >= '0' && (c) <= '7')
> >  static char *unescape(char *str)
> >  {
> >  	char *in = str;
> > diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
> > index 05ea9ac..80fe5c8 100644
> > --- a/net/sunrpc/cache.c
> > +++ b/net/sunrpc/cache.c
> > @@ -1210,7 +1210,6 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall);
> >   * key and content are both parsed by cache
> >   */
> >
> > -#define isodigit(c) (isdigit(c) && c <= '7')
> >  int qword_get(char **bpp, char *dest, int bufsize)
> >  {
> >  	/* return bytes copied, or -1 on error */
> > --
> > 1.8.2.rc0.22.gb3600c3
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe netdev" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy
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