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From: Chris Faylor <cgf@cygnus.com>
Date: Thu, 16 Mar 2000 16:48:24 -0500
To: cygwin@sourceware.cygnus.com
Subject: Re: sscanf() %n Bug Introduced in 20000221 Snapshot
Message-ID: <20000316164824.A29342@cygnus.com>
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References: <38D14C36.F60C9191@Sparta.Com>
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In-Reply-To: <38D14C36.F60C9191@Sparta.Com>; from mark_rahner@Sparta.Com on Thu, Mar 16, 2000 at 04:03:50PM -0500

sscanf comes from the newlib library.  Try sending email to newlib@sourceware.cygnus.com.

Also, try a new snapshot.

cgf

On Thu, Mar 16, 2000 at 04:03:50PM -0500, Mark Rahner wrote:
>I apologize for sending an HTML formatted message last time.  Here's the
>plain text version...
>
>This message documents a problem with sscanf() %n format specification
>which began, to the best of my knowledge, with the 20000221 snapshot.
>This problem did not exist in the 20000211 snapshot.  I'm using
>Windows98 and Cygwin Beta 20.1 with upgrades consisting of Mumit's
>2.95.2 compiler and the 200000221 snapshot.
>
>Compiling the following using "g++ sscanfBug.C -o sscanfBug.exe"
>
>     #include <stdio.h>
>     #include <iostream>
>
>     int main () {
>
>         const char *str = "0.02";
>         double num;
>         int len;
>
>         cerr << "str is <" << str << ">\n";
>
>         sscanf( str, "%lf%n", &num, &len );
>
>         cerr << "num is <" << num << ">\n";
>         cerr << "len is <" << len << ">\n";
>     }
>
>produces an executable which, when run, writes the following to standard
>error:
>
>     str is <0.02>
>     num is <0.02>
>     len is <2>
>
>The correct value for len is 4.  Please note that this is not the same
>problem discussed on this mailing list last June.  Specifically, there
>is no space preceding %n.  I apologize in advance for not presenting you
>with a patch; after briefly attempting to track this bug myself, I
>realized that I wasn't getting anywhere.
>
>Hope this helps,
>Mark Rahner

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