Re: [Boost-users] crc.hpp and visual studio run time checking

From: Daryle Walker (darylew_at_[hidden])
Date: 2005-12-16 12:37:46

On 12/14/05 2:32 PM, "Clarke, Trevor" <tclarke_at_[hidden]> wrote:

> There are a few places in crc.hpp where the following happens:
> static  value_type  shift( value_type rem )
>          { return rem << CHAR_BIT; }
> 
> The problem is, if run time checking is active in VS2003 (I assume 2005 has
> the same issue), a pop-up warning is issued during every call to the function
> as data is lost. (that¹s the intent in fact). The fix is to mask (rem <<
> CHAR_BIT) & 0xffff  (or whatever the appropriate mask value is for
> value_type). Is this a known issue? It¹s technically not a bug but could cause
> some annoyances for anybody using rtc. Should this be changed?

What's the point of the mask?  The affected bits have already gone to
oblivion at that point.  Maybe RTC has a bug?

-- 
Daryle Walker
Mac, Internet, and Video Game Junkie
darylew AT hotmail DOT com