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Re: [PATCH] inet_ntop.c: Work around GCC 4.6's detection of uninitialized variables

From
Junio C Hamano <gitster@pobox.com>
Date
Oct 18, 2011, 17:32 UTC
Message-ID
<7vehyagq82.fsf@alter.siamese.dyndns.org>
In-Reply-To
<4E9DA88E.40500@gmail.com>
Sebastian Schuberth <sschuberth@gmail.com> writes:
Show 23 quoted lines
> GCC 4.6 claims that
>
>     error: 'best.len' may be used uninitialized in this function
>
> so silence that warning which is treated as an error by also initializing
> the "len" members of the struct.
>
> Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
> ---
>  compat/inet_ntop.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/compat/inet_ntop.c b/compat/inet_ntop.c
> index ea249c6..60b5a1d 100644
> --- a/compat/inet_ntop.c
> +++ b/compat/inet_ntop.c
> @@ -98,7 +98,9 @@ inet_ntop6(const u_char *src, char *dst, size_t size)
>  	for (i = 0; i < NS_IN6ADDRSZ; i++)
>  		words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
>  	best.base = -1;
> +	best.len = 0;
>  	cur.base = -1;
> +	cur.len = 0;
It may be just the "taste" thing, but I wonder if
	best.base = -1;
        best.len = 0;
        cur = best;
might be easier on the eyes.
Will queue as-is anyway. Thanks.
>  	for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
>  		if (words[i] == 0) {
>  			if (cur.base == -1)
Previous: Sebastian SchuberthNext: Sebastian Schuberth
Message 2 of 3 in “inet_ntop.c: Work around GCC 4.6's detection of uninitialized variables”
  1. inet_ntop.c: Work around GCC 4.6's detection of uninitialized variablesSebastian Schuberth, Oct 18, 2011
  2. Junio C HamanoOct 18, 2011
  3. Sebastian SchuberthOct 18, 2011

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