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Subject: Re: [boost] float_mem_cast
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-05-26 09:53:32


Steven Ross wrote:
> There is one function necessary for users to be able to cast their own float
> types. Should it be in spreadsort.hpp or some separate header file? It
> seems silly to have a separate header file for it, but I guess it might be
> used on its own.
> //Casts a float to the specified integer type
> template<class Data_type, class Cast_type>
> inline Cast_type
> float_mem_cast(const Data_type & data)
> {
> //Only cast IEEE floating-point numbers, and only to a same-sized
> integer
> BOOST_STATIC_ASSERT(sizeof(Cast_type) == sizeof(Data_type));
> BOOST_STATIC_ASSERT(std::numeric_limits<Data_type>::is_iec559);
> BOOST_STATIC_ASSERT(std::numeric_limits<Cast_type>::is_integer);
> Cast_type result;
> std::memcpy(&result, &data, sizeof(Cast_type));
> return result;
> }

Pu it in a detail namespace. If others need the same functionality,
we can discuss generalizing it then.

In Christ,
Steven Watanabe

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