// | |
// Copyright (c) 2000-2002 | |
// Joerg Walter, Mathias Koch | |
// | |
// 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) | |
// | |
// The authors gratefully acknowledge the support of | |
// GeNeSys mbH & Co. KG in producing this work. | |
// | |
#ifndef _BOOST_UBLAS_DUFF_ | |
#define _BOOST_UBLAS_DUFF_ | |
#define DD_SWITCH(n, d, r, expr) \ | |
{ \ | |
unsigned r = ((n) + (d) - 1) / (d); \ | |
switch ((n) % (d)) { \ | |
case 0: do { expr; | |
#define DD_CASE_I(i, expr) \ | |
case (i): expr; | |
#define DD_WHILE(r) \ | |
} while (-- (r) > 0); \ | |
} \ | |
} | |
#define DD_1T(n, d, r, expr) \ | |
DD_WHILE(r) | |
#define DD_2T(n, d, r, expr) \ | |
DD_CASE_I(1, expr) \ | |
DD_1T(n, d, r, expr) | |
#define DD_3T(n, d, r, expr) \ | |
DD_CASE_I(2, expr) \ | |
DD_2T(n, d, r, expr) | |
#define DD_4T(n, d, r, expr) \ | |
DD_CASE_I(3, expr) \ | |
DD_3T(n, d, r, expr) | |
#define DD_5T(n, d, r, expr) \ | |
DD_CASE_I(4, expr) \ | |
DD_4T(n, d, r, expr) | |
#define DD_6T(n, d, r, expr) \ | |
DD_CASE_I(5, expr) \ | |
DD_5T(n, d, r, expr) | |
#define DD_7T(n, d, r, expr) \ | |
DD_CASE_I(6, expr) \ | |
DD_6T(n, d, r, expr) | |
#define DD_8T(n, d, r, expr) \ | |
DD_CASE_I(7, expr) \ | |
DD_7T(n, d, r, expr) | |
#define DD(n, d, r, expr) \ | |
DD_SWITCH(n, d, r, expr) \ | |
DD_##d##T(n, d, r, expr) | |
#endif |