Re: [PATCH] Optimize prefixcmp()

From: Marco Costalba <mcostalba@gmail.com>
Date: Dec 30, 2007, 15:17 UTC
Message-ID: <e5bfff550712300717r4512954rbf2516491fc13adc@mail.gmail.com>
In-Reply-To: <e5bfff550712300650j2ea70032jaca893b734592184@mail.gmail.com>

On Dec 30, 2007 3:50 PM, Marco Costalba <mcostalba@gmail.com> wrote:

>
> If *prefix == "" case is to be considered I vote for your/Johannes
> version because it's "better code" (tm).
>

Ok this is fast and correct

static inline int prefixcmp(const char *str, const char *prefix)
{
	while (*str == *prefix && *prefix)
    		str++, prefix++;

	return (*prefix ? *(unsigned const char *)prefix - *(unsigned const
char *)str : 0);
}

This is the last one, I promise ;-)

Marco