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Message-ID: <20170710020047.GL1627@brightrain.aerifal.cx>
Date: Sun, 9 Jul 2017 22:00:47 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] handle whitespace before %% in scanf
On Sun, Jul 09, 2017 at 11:00:18PM +0200, Bartosz Brachaczek wrote:
> this is mandated by C and POSIX standards and is in accordance with
^^^^
> glibc behavior.
Can you explain exactly what "this" refers to?
> ---
> src/stdio/vfscanf.c | 10 +++++++---
> src/stdio/vfwscanf.c | 8 ++++++--
> 2 files changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/src/stdio/vfscanf.c b/src/stdio/vfscanf.c
> index d4d2454b..9e030fc4 100644
> --- a/src/stdio/vfscanf.c
> +++ b/src/stdio/vfscanf.c
> @@ -89,15 +89,19 @@ int vfscanf(FILE *restrict f, const char *restrict fmt, va_list ap)
> continue;
> }
> if (*p != '%' || p[1] == '%') {
> - p += *p=='%';
> shlim(f, 0);
> - c = shgetc(f);
> + if (*p == '%') {
> + p++;
> + while (isspace((c=shgetc(f))));
> + } else {
> + c = shgetc(f);
> + }
It looks like you're claiming %% consumes space, which I can't find
any support for in the C standard. Has this topic been discussed
somewhere I should see?
Rich
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