boost/boost/preprocessor/arithmetic/div.hpp

   1 #ifndef BOOST_PREPROCESSOR_ARITHMETIC_DIV_HPP
   2 #define BOOST_PREPROCESSOR_ARITHMETIC_DIV_HPP
   3
   4 /* Copyright (C) 2001
   5  * Housemarque Oy
   6  * http://www.housemarque.com
   7  *
   8  * Permission to copy, use, modify, sell and distribute this software is
   9  * granted provided this copyright notice appears in all copies. This
  10  * software is provided "as is" without express or implied warranty, and
  11  * with no claim as to its suitability for any purpose.
  12  *
  13  * See http://www.boost.org for most recent version.
  14  */
  15
  16 #include <boost/preprocessor/comparison/less_equal.hpp>
  17 #include <boost/preprocessor/inc.hpp>
  18
  19 /** <p>Expands to the quotient of <code>X</code> and <code>Y</code>.</p>
  20
  21 <p>Both <code>X</code> and <code>Y</code> must expand to integer literals
  22 in the range [0, BOOST_PP_LIMIT_MAG].</p>
  23
  24 <p>For example, <code>BOOST_PP_DIV(4,3)</code> expands to <code>1</code> (a
  25 single token).</p>
  26
  27 <h3>Test</h3>
  28 <ul>
  29   <li><a href="../../test/arithmetic_test.cpp">arithmetic_test.cpp</a></li>
  30 </ul>
  31 */
  32 #define BOOST_PP_DIV(X,Y) BOOST_PP_DIV_D(0,X,Y)
  33
  34 /** <p>Can be used inside BOOST_PP_WHILE() (see for an explanation of the D parameter).</p> */
  35 #define BOOST_PP_DIV_D(D,X,Y) BOOST_PP_TUPLE_ELEM(3,0,BOOST_PP_WHILE##D(BOOST_PP_DIV_C,BOOST_PP_DIV_F,(0,X,Y)))
  36
  37 #define BOOST_PP_DIV_C(D,RCY) BOOST_PP_LESS_EQUAL_D(D,BOOST_PP_TUPLE_ELEM(3,2,RCY),BOOST_PP_TUPLE_ELEM(3,1,RCY))
  38 #define BOOST_PP_DIV_F(D,RCY) (BOOST_PP_INC(BOOST_PP_TUPLE_ELEM(3,0,RCY)),BOOST_PP_SUB_D(D,BOOST_PP_TUPLE_ELEM(3,1,RCY),BOOST_PP_TUPLE_ELEM(3,2,RCY)),BOOST_PP_TUPLE_ELEM(3,2,RCY))
  39 #endif