linux-kernel - Re: [PATCH 14/16] dynamic_debug: add trim_prefix() to provide source-root relative paths

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Message-ID: <CAO+b5-od4CFkJkxQKoXq4e85XeKq9VFX2kh5FbT7_JMSgFX=JQ@mail.gmail.com>
Date:	Tue, 20 Dec 2011 08:15:55 +0000
From:	Bart Van Assche <bvanassche@....org>
To:	Jason Baron <jbaron@...hat.com>
Cc:	greg@...ah.com, jim.cromie@...il.com, joe@...ches.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/16] dynamic_debug: add trim_prefix() to provide
 source-root relative paths

On Mon, Dec 19, 2011 at 10:13 PM, Jason Baron <jbaron@...hat.com> wrote:
> +/* Return the path relative to source root */
> +static inline const char *trim_prefix(const char *path)
> +{
> +       int skip = strlen(__FILE__) - strlen("lib/dynamic_debug.c");
> +
> +       if (strncmp(path, __FILE__, skip))
> +               skip = 0; /* prefix mismatch, don't skip */
> +
> +       return path + skip;
> +}

Isn't the preferred style to write if (strncmp(...) != 0) ..., i.e. to
mention "!= 0" explicitly instead of leaving it out when comparing
strings ?

Bart.
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