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Subject: Re: [boost] Any interest in bitstream class?
From: Paul Long (plong_at_[hidden])
Date: 2013-06-28 19:18:56

On 6/28/2013 3:32 PM, Mathias Gaunard wrote:
> - how do you overload operator>> or operator<< for your stream?
I'm not sure what you mean by "how." To date, I have only implemented
the input side and so haven't overloaded operator<<. For operator>>, I
have overloaded it for various right-hand parameters, including
integrals and a few stream manipulators, such as aligng(). The left hand
is always an ibitstream reference (which will be extended to bitstream
and obitstream references once I support output streams).
> How do you avoid conflicts with text-based overloads?
Maybe I misunderstand your question, but I'm not even aware of how there
can be a conflict. Since these operators are overloaded with left hand
of bitstream, ibitstream, or obitstream, they cannot be applied to the
std::iostream derivatives. Is that what you mean?
> - what does writing an int to a stream actually do? Is it the same
> behaviour as write(&i, sizeof(int)), or does it translate the int to
> big-endian first?
Effectively the latter. It does not assume any particular endianness of
the platform (for example, it does not blindly copy platform memory to
the bit stream) and therefore does not actually "translate" between
endians. The effect, however, is that integrals in the bit stream are
always big endian and integrals on the platform are always their native
endian. That said, awareness of platform endianness could inform future


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