linux-kernel - Re: [PATCH v2 2/3] lib/string_helpers.c: Refactor string_escape

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Message-ID: <20150129193319.GB21543@unpythonic.net>
Date:	Thu, 29 Jan 2015 13:33:19 -0600
From:	Jeff Epler <jepler@...ythonic.net>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mathias Krause <minipli@...glemail.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] lib/string_helpers.c: Refactor string_escape_mem

[discussing the repeated three-line idiom]
> if (out < end)
>  *out = '\\';
> ++out;

Instead of open-coding this each time, perhaps it would be appropriate
to define a macro to possibly put a character and also advance the
pointer.

Assuming that the locals are consistently "out" and "end", something
like

    #define addch(c) do { \
            if(out < end) *out = c; \
            ++out; \
    } while(0)

modulo any errors or differences with standard kernel coding style.

Jeff
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