Re: [boost] License of endian and limits in Boost detail

Subject: Re: [boost] License of endian and limits in Boost detail
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2013-03-19 10:26:05

On Tue, Mar 19, 2013 at 6:00 PM, Rene Rivera <grafikrobot_at_[hidden]> wrote:
> On Tue, Mar 19, 2013 at 3:59 AM, Marc Glisse <marc.glisse_at_[hidden]> wrote:
>
>> BOOST_BIG_ENDIAN or BOOST_LITTLE_ENDIAN, BOOST_BYTE_ORDER which can be
>> 4321 or 1234, etc.
>>
>
> If you read the documentation for the Predef library you would see that I'm
> following a particular naming convention that defines categories
> (BOOST_category_subcat_subsubcat). I do have some questions regarding the
> BYTE_ORDER macros..
>
> Are the macros defining the 4321/1234 numbers actually needed? Are there
> situations where the on/off indicator macros aren't enough?

According to Wikipedia [1], there are cases of mixed endianness, so
the BOOST_BYTE_ORDER macro could have e.g. value 3412. Also, FP
endianness may differ from the one of integers, so probably there have
to be separate sets of macros for these.

[1] http://en.wikipedia.org/wiki/Endianness