Chris@16: //  ratio_fwd.hpp  ---------------------------------------------------------------//
Chris@16: 
Chris@16: //  Copyright 2008 Howard Hinnant
Chris@16: //  Copyright 2008 Beman Dawes
Chris@16: //  Copyright 2009 Vicente J. Botet Escriba
Chris@16: 
Chris@16: //  Distributed under the Boost Software License, Version 1.0.
Chris@16: //  See http://www.boost.org/LICENSE_1_0.txt
Chris@16: 
Chris@16: /*
Chris@16: 
Chris@16: This code was derived by Beman Dawes from Howard Hinnant's time2_demo prototype.
Chris@16: Many thanks to Howard for making his code available under the Boost license.
Chris@16: The original code was modified to conform to Boost conventions and to section
Chris@16: 20.4 Compile-time rational arithmetic [ratio], of the C++ committee working
Chris@16: paper N2798.
Chris@16: See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2798.pdf.
Chris@16: 
Chris@16: time2_demo contained this comment:
Chris@16: 
Chris@16:     Much thanks to Andrei Alexandrescu,
Chris@16:                    Walter Brown,
Chris@16:                    Peter Dimov,
Chris@16:                    Jeff Garland,
Chris@16:                    Terry Golubiewski,
Chris@16:                    Daniel Krugler,
Chris@16:                    Anthony Williams.
Chris@16: */
Chris@16: 
Chris@16: // The way overflow is managed for ratio_less is taken from llvm/libcxx/include/ratio
Chris@16: 
Chris@16: #ifndef BOOST_RATIO_RATIO_FWD_HPP
Chris@16: #define BOOST_RATIO_RATIO_FWD_HPP
Chris@16: 
Chris@16: #include <boost/ratio/config.hpp>
Chris@16: 
Chris@101: #if defined(__GNUC__) && (__GNUC__ >= 4)
Chris@101: #pragma GCC system_header
Chris@101: #endif
Chris@101: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: //----------------------------------------------------------------------------//
Chris@16: //                                                                            //
Chris@16: //              20.6 Compile-time rational arithmetic [ratio]                 //
Chris@16: //                                                                            //
Chris@16: //----------------------------------------------------------------------------//
Chris@16: 
Chris@16: // ratio
Chris@16: template <boost::intmax_t N, boost::intmax_t D = 1> class ratio;
Chris@16: 
Chris@16: // ratio arithmetic
Chris@16: template <class R1, class R2> struct ratio_add;
Chris@16: template <class R1, class R2> struct ratio_subtract;
Chris@16: template <class R1, class R2> struct ratio_multiply;
Chris@16: template <class R1, class R2> struct ratio_divide;
Chris@101: #ifdef BOOST_RATIO_EXTENSIONS
Chris@101: template <class R1, class R2> struct ratio_gcd;
Chris@101: template <class R1, class R2> struct ratio_lcm;
Chris@101: template <class R> struct ratio_negate;
Chris@101: template <class R> struct ratio_abs;
Chris@101: template <class R> struct ratio_sign;
Chris@101: template <class R, int P> struct ratio_power;
Chris@101: #endif
Chris@16: 
Chris@16: // ratio comparison
Chris@16: template <class R1, class R2> struct ratio_equal;
Chris@16: template <class R1, class R2> struct ratio_not_equal;
Chris@16: template <class R1, class R2> struct ratio_less;
Chris@16: template <class R1, class R2> struct ratio_less_equal;
Chris@16: template <class R1, class R2> struct ratio_greater;
Chris@16: template <class R1, class R2> struct ratio_greater_equal;
Chris@16: 
Chris@16: // convenience SI typedefs
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000000000)> atto;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),    BOOST_RATIO_INTMAX_C(1000000000000000)> femto;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),       BOOST_RATIO_INTMAX_C(1000000000000)> pico;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),          BOOST_RATIO_INTMAX_C(1000000000)> nano;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),             BOOST_RATIO_INTMAX_C(1000000)> micro;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),                BOOST_RATIO_INTMAX_C(1000)> milli;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),                 BOOST_RATIO_INTMAX_C(100)> centi;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1),                  BOOST_RATIO_INTMAX_C(10)> deci;
Chris@16: typedef ratio<                 BOOST_RATIO_INTMAX_C(10), BOOST_RATIO_INTMAX_C(1)> deca;
Chris@16: typedef ratio<                BOOST_RATIO_INTMAX_C(100), BOOST_RATIO_INTMAX_C(1)> hecto;
Chris@16: typedef ratio<               BOOST_RATIO_INTMAX_C(1000), BOOST_RATIO_INTMAX_C(1)> kilo;
Chris@16: typedef ratio<            BOOST_RATIO_INTMAX_C(1000000), BOOST_RATIO_INTMAX_C(1)> mega;
Chris@16: typedef ratio<         BOOST_RATIO_INTMAX_C(1000000000), BOOST_RATIO_INTMAX_C(1)> giga;
Chris@16: typedef ratio<      BOOST_RATIO_INTMAX_C(1000000000000), BOOST_RATIO_INTMAX_C(1)> tera;
Chris@16: typedef ratio<   BOOST_RATIO_INTMAX_C(1000000000000000), BOOST_RATIO_INTMAX_C(1)> peta;
Chris@16: typedef ratio<BOOST_RATIO_INTMAX_C(1000000000000000000), BOOST_RATIO_INTMAX_C(1)> exa;
Chris@16: 
Chris@101: #ifdef BOOST_RATIO_EXTENSIONS
Chris@101: 
Chris@101: #define BOOST_RATIO_1024 BOOST_RATIO_INTMAX_C(1024)
Chris@101: 
Chris@101: // convenience IEC typedefs
Chris@101: typedef ratio<                                                                                     BOOST_RATIO_1024> kibi;
Chris@101: typedef ratio<                                                                    BOOST_RATIO_1024*BOOST_RATIO_1024> mebi;
Chris@101: typedef ratio<                                                   BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> gibi;
Chris@101: typedef ratio<                                  BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> tebi;
Chris@101: typedef ratio<                 BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> pebi;
Chris@101: typedef ratio<BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> exbi;
Chris@101: 
Chris@101: #endif
Chris@16: }  // namespace boost
Chris@16: 
Chris@16: 
Chris@16: #endif  // BOOST_RATIO_HPP