diff -r 000000000000 -r e4d67989cc36 ossrv_pub/boost_apis/boost/integer.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ossrv_pub/boost_apis/boost/integer.hpp Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,127 @@ +// boost integer.hpp header file -------------------------------------------// + +// Copyright Beman Dawes and Daryle Walker 1999. 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_0.txt) + +// See http://www.boost.org/libs/integer for documentation. + +// Revision History +// 22 Sep 01 Added value-based integer templates. (Daryle Walker) +// 01 Apr 01 Modified to use new header. (John Maddock) +// 30 Jul 00 Add typename syntax fix (Jens Maurer) +// 28 Aug 99 Initial version + +#ifndef BOOST_INTEGER_HPP +#define BOOST_INTEGER_HPP + +#include // self include + +#include // for boost::integer_traits +#include // for std::numeric_limits + +namespace boost +{ + + // Helper templates ------------------------------------------------------// + + // fast integers from least integers + // int_fast_t<> works correctly for unsigned too, in spite of the name. + template< typename LeastInt > + struct int_fast_t { typedef LeastInt fast; }; // imps may specialize + + // convert category to type + template< int Category > struct int_least_helper {}; // default is empty + + // specializatons: 1=long, 2=int, 3=short, 4=signed char, + // 6=unsigned long, 7=unsigned int, 8=unsigned short, 9=unsigned long + // no specializations for 0 and 5: requests for a type > long are in error + template<> struct int_least_helper<1> { typedef long least; }; + template<> struct int_least_helper<2> { typedef int least; }; + template<> struct int_least_helper<3> { typedef short least; }; + template<> struct int_least_helper<4> { typedef signed char least; }; + template<> struct int_least_helper<6> { typedef unsigned long least; }; + template<> struct int_least_helper<7> { typedef unsigned int least; }; + template<> struct int_least_helper<8> { typedef unsigned short least; }; + template<> struct int_least_helper<9> { typedef unsigned char least; }; + + // integer templates specifying number of bits ---------------------------// + + // signed + template< int Bits > // bits (including sign) required + struct int_t + { + typedef typename int_least_helper + < + (Bits-1 <= std::numeric_limits::digits) + + (Bits-1 <= std::numeric_limits::digits) + + (Bits-1 <= std::numeric_limits::digits) + + (Bits-1 <= std::numeric_limits::digits) + >::least least; + typedef typename int_fast_t::fast fast; + }; + + // unsigned + template< int Bits > // bits required + struct uint_t + { + typedef typename int_least_helper + < + 5 + + (Bits <= std::numeric_limits::digits) + + (Bits <= std::numeric_limits::digits) + + (Bits <= std::numeric_limits::digits) + + (Bits <= std::numeric_limits::digits) + >::least least; + typedef typename int_fast_t::fast fast; + // int_fast_t<> works correctly for unsigned too, in spite of the name. + }; + + // integer templates specifying extreme value ----------------------------// + + // signed + template< long MaxValue > // maximum value to require support + struct int_max_value_t + { + typedef typename int_least_helper + < + (MaxValue <= integer_traits::const_max) + + (MaxValue <= integer_traits::const_max) + + (MaxValue <= integer_traits::const_max) + + (MaxValue <= integer_traits::const_max) + >::least least; + typedef typename int_fast_t::fast fast; + }; + + template< long MinValue > // minimum value to require support + struct int_min_value_t + { + typedef typename int_least_helper + < + (MinValue >= integer_traits::const_min) + + (MinValue >= integer_traits::const_min) + + (MinValue >= integer_traits::const_min) + + (MinValue >= integer_traits::const_min) + >::least least; + typedef typename int_fast_t::fast fast; + }; + + // unsigned + template< unsigned long Value > // maximum value to require support + struct uint_value_t + { + typedef typename int_least_helper + < + 5 + + (Value <= integer_traits::const_max) + + (Value <= integer_traits::const_max) + + (Value <= integer_traits::const_max) + + (Value <= integer_traits::const_max) + >::least least; + typedef typename int_fast_t::fast fast; + }; + + +} // namespace boost + +#endif // BOOST_INTEGER_HPP