/usr/include/boost/multiprecision/detail/digits.hpp is in libboost1.54-dev 1.54.0-4ubuntu3.
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// Copyright 2012 John Maddock. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
#ifndef BOOST_MP_DIGITS_HPP
#define BOOST_MP_DIGITS_HPP
namespace boost{ namespace multiprecision{ namespace detail{
inline unsigned long digits10_2_2(unsigned long d10)
{
return (d10 * 1000uL) / 301uL + ((d10 * 1000uL) % 301 ? 2u : 1u);
}
inline unsigned long digits2_2_10(unsigned long d2)
{
return (d2 * 301uL) / 1000uL;
}
}}} // namespaces
#endif
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