Re: [Boost-users] [Iostreams] file_descriptor::seek() bug

From: Jonathan Turkanis (technews_at_[hidden])
Date: 2005-11-19 00:12:13

Takeshi Mouri wrote:
> Hello,
>
> I try file_descriptor::seek() for a big file over 4GB on Win32,
> but the result was not correct.
>
> file_descriptor.cpp(185)
>>        LONG lDistanceToMoveHigh =
>>            off < 0xffffffff ?
>>                static_cast<LONG>(off >> 32) :
>>                0;
>
> I think that lDistanceToMoveHigh always becomes 0.
> The condition above should be "off > 0xffffffff".

Yeah, this is definitely wrong. It should just be

  LONG lDistanceToMoveHigh = static_cast<LONG>(off >> 32);

It's hard to test features that require really huge files.

Thanks for pointing this out.

> Regards,
> Takeshi Mouri

-- 
Jonathan Turkanis
www.kangaroologic.com