boost_preprocessor/include/boost/preprocessor/arithmetic/mul.hpp

# /* Copyright (C) 2001
#  * Housemarque Oy
#  * http://www.housemarque.com
#  *
#  * 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)
#  */
#
# /* Revised by Paul Mensonides (2002) */
#
# /* See http://www.boost.org for most recent version. */
#
# ifndef BOOST_PREPROCESSOR_ARITHMETIC_MUL_HPP
# define BOOST_PREPROCESSOR_ARITHMETIC_MUL_HPP
#
# include <boost/preprocessor/arithmetic/add.hpp>
# include <boost/preprocessor/arithmetic/dec.hpp>
# include <boost/preprocessor/config/config.hpp>
# include <boost/preprocessor/control/iif.hpp>
# include <boost/preprocessor/control/while.hpp>
# include <boost/preprocessor/tuple/elem.hpp>
# include <boost/preprocessor/tuple/rem.hpp>
# include <boost/preprocessor/arithmetic/detail/is_minimum_number.hpp>
# include <boost/preprocessor/arithmetic/detail/is_maximum_number.hpp>
#
# /* BOOST_PP_MUL */
#
#    define BOOST_PP_MUL(x, y) BOOST_PP_IIF(BOOST_PP_DETAIL_IS_MAXIMUM_NUMBER(y),BOOST_PP_MUL_CHECK_MIN,BOOST_PP_MUL_DO)(x,y)
#
#    define BOOST_PP_MUL_CHECK_MIN(x,y) BOOST_PP_IIF(BOOST_PP_DETAIL_IS_MINIMUM_NUMBER(x),0,BOOST_PP_DETAIL_MAXIMUM_NUMBER)
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
#    define BOOST_PP_MUL_DO(x, y) BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_WHILE(BOOST_PP_MUL_P, BOOST_PP_MUL_O, (0, x, y)))
# else
#    define BOOST_PP_MUL_DO(x, y) BOOST_PP_MUL_I(x, y)
#    define BOOST_PP_MUL_I(x, y) BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_WHILE(BOOST_PP_MUL_P, BOOST_PP_MUL_O, (0, x, y)))
# endif
#
# define BOOST_PP_MUL_P(d, rxy) BOOST_PP_TUPLE_ELEM(3, 2, rxy)
#
# if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT()
#    define BOOST_PP_MUL_O(d, rxy) BOOST_PP_MUL_O_IM(d, BOOST_PP_TUPLE_REM_3 rxy)
#    define BOOST_PP_MUL_O_IM(d, im) BOOST_PP_MUL_O_I(d, im)
# else
#    define BOOST_PP_MUL_O(d, rxy) BOOST_PP_MUL_O_I(d, BOOST_PP_TUPLE_ELEM(3, 0, rxy), BOOST_PP_TUPLE_ELEM(3, 1, rxy), BOOST_PP_TUPLE_ELEM(3, 2, rxy))
# endif
#
# define BOOST_PP_MUL_O_I(d, r, x, y) (BOOST_PP_ADD_D(d, r, x), x, BOOST_PP_DEC(y))
#
# /* BOOST_PP_MUL_D */
#
#    define BOOST_PP_MUL_D(d, x, y) BOOST_PP_IIF(BOOST_PP_DETAIL_IS_MAXIMUM_NUMBER(y),BOOST_PP_MUL_CHECK_MIN_D,BOOST_PP_MUL_DO_D)(d,x,y)
#
#    define BOOST_PP_MUL_CHECK_MIN_D(d,x,y) BOOST_PP_IIF(BOOST_PP_DETAIL_IS_MINIMUM_NUMBER(x),0,BOOST_PP_DETAIL_MAXIMUM_NUMBER)
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
#    define BOOST_PP_MUL_DO_D(d, x, y) BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_MUL_P, BOOST_PP_MUL_O, (0, x, y)))
# else
#    define BOOST_PP_MUL_DO_D(d, x, y) BOOST_PP_MUL_D_I(d, x, y)
#    define BOOST_PP_MUL_D_I(d, x, y) BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_MUL_P, BOOST_PP_MUL_O, (0, x, y)))
# endif
#
# endif