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From: "don dot wakefield at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/45628] std::fstream::tellg invalidates I/O buffer
Date: Fri, 10 Sep 2010 15:15:00 -0000	[thread overview]
Message-ID: <20100910151516.17022.qmail@sourceware.org> (raw)
In-Reply-To: <bug-45628-18186@http.gcc.gnu.org/bugzilla/>



------- Comment #10 from don dot wakefield at gmail dot com  2010-09-10 15:15 -------
(In reply to comment #9)
> Ok. I don't think we should change the code to deal such specially with off ==
> 0, if we are going to change it we should decouple the return value from what
> the underlying seek returns, and always call fseek(..., width * off, ...) as
> the standard mandates. Then dealing with off == 0 becomes simple.

I'm not sure I understand what you are saying. My concern is that calls to
filebuf::seekoff(0,ios::cur) should not invalidate the buffer just to return a
correct answer to "where am I?". Whether this is an accident of history or not,
I've seen this usage enshrined in code as a respected idiom.

Does your text above specify this?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45628


  parent reply	other threads:[~2010-09-10 15:15 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-10  6:58 [Bug libstdc++/45628] New: " potswa at mac dot com
2010-09-10  7:09 ` [Bug libstdc++/45628] " potswa at mac dot com
2010-09-10 10:55 ` paolo dot carlini at oracle dot com
2010-09-10 12:09 ` paolo dot carlini at oracle dot com
2010-09-10 12:12 ` paolo dot carlini at oracle dot com
2010-09-10 12:21 ` paolo dot carlini at oracle dot com
2010-09-10 12:37 ` paolo dot carlini at oracle dot com
2010-09-10 14:06 ` don dot wakefield at gmail dot com
2010-09-10 14:40 ` paolo dot carlini at oracle dot com
2010-09-10 14:54 ` don dot wakefield at gmail dot com
2010-09-10 15:01 ` paolo dot carlini at oracle dot com
2010-09-10 15:15 ` don dot wakefield at gmail dot com [this message]
2010-09-10 15:19 ` paolo dot carlini at oracle dot com
2010-09-10 15:24 ` don dot wakefield at gmail dot com
2010-09-10 15:45 ` paolo dot carlini at oracle dot com
2010-09-10 16:00 ` potswa at mac dot com
2010-09-10 16:16 ` potswa at mac dot com
2010-09-10 17:12 ` paolo dot carlini at oracle dot com
2010-09-10 17:25 ` potswa at mac dot com
2010-09-10 17:29 ` paolo dot carlini at oracle dot com
2010-09-10 17:31 ` paolo dot carlini at oracle dot com
2010-09-10 17:36 ` potswa at mac dot com
2010-09-10 17:40 ` potswa at mac dot com
2010-09-10 17:42 ` paolo dot carlini at oracle dot com
2010-09-10 18:54 ` potswa at mac dot com
2010-09-10 19:01 ` paolo dot carlini at oracle dot com
2010-09-10 19:26 ` potswa at mac dot com
2010-09-10 19:30 ` potswa at mac dot com
2010-09-10 19:31 ` paolo dot carlini at oracle dot com
2010-09-10 19:34 ` paolo dot carlini at oracle dot com
2010-09-10 19:52 ` paolo dot carlini at oracle dot com
2010-09-10 20:34 ` potswa at mac dot com
2010-09-11  4:28 ` paolo dot carlini at oracle dot com
2010-09-11  4:49 ` potswa at mac dot com
2010-09-11  4:57 ` potswa at mac dot com
2010-09-11  9:22 ` paolo dot carlini at oracle dot com
2010-09-11  9:43 ` potswa at mac dot com
2010-09-11 10:03 ` paolo dot carlini at oracle dot com
2010-09-17 12:42 ` paolo dot carlini at oracle dot com
2010-09-17 17:52 ` potswa at mac dot com
2010-09-17 18:04 ` potswa at mac dot com
2010-09-17 18:53 ` paolo dot carlini at oracle dot com
2010-09-17 19:05 ` potswa at mac dot com
2010-09-17 19:10 ` paolo dot carlini at oracle dot com
2010-09-17 19:11 ` potswa at mac dot com
2010-09-17 19:17 ` paolo dot carlini at oracle dot com
2010-09-17 19:21 ` potswa at mac dot com
2010-09-17 19:26 ` paolo dot carlini at oracle dot com
2010-09-17 19:38 ` paolo dot carlini at oracle dot com
2010-09-17 19:46 ` potswa at mac dot com
2010-09-17 19:50 ` paolo dot carlini at oracle dot com
2010-09-17 19:57 ` potswa at mac dot com
2010-09-17 20:07 ` paolo dot carlini at oracle dot com
2010-09-17 21:11 ` don dot wakefield at gmail dot com
2010-09-17 21:22 ` paolo dot carlini at oracle dot com
2010-09-17 21:51 ` potswa at mac dot com
2010-09-17 21:59 ` paolo dot carlini at oracle dot com
2010-09-20 21:32 ` paolo dot carlini at oracle dot com
2010-09-22 19:41 ` paolo at gcc dot gnu dot org
     [not found] <bug-45628-4@http.gcc.gnu.org/bugzilla/>
2010-09-25 14:47 ` paolo.carlini at oracle dot com

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