57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
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//
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// Copyright (c) 2000-2002
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// Joerg Walter, Mathias Koch
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// The authors gratefully acknowledge the support of
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// GeNeSys mbH & Co. KG in producing this work.
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//
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#ifndef _BOOST_UBLAS_DUFF_
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#define _BOOST_UBLAS_DUFF_
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#define DD_SWITCH(n, d, r, expr) \
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{ \
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unsigned r = ((n) + (d) - 1) / (d); \
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switch ((n) % (d)) { \
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case 0: do { expr;
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#define DD_CASE_I(i, expr) \
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case (i): expr;
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#define DD_WHILE(r) \
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} while (-- (r) > 0); \
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} \
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}
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#define DD_1T(n, d, r, expr) \
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DD_WHILE(r)
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#define DD_2T(n, d, r, expr) \
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DD_CASE_I(1, expr) \
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DD_1T(n, d, r, expr)
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#define DD_3T(n, d, r, expr) \
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DD_CASE_I(2, expr) \
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DD_2T(n, d, r, expr)
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#define DD_4T(n, d, r, expr) \
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DD_CASE_I(3, expr) \
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DD_3T(n, d, r, expr)
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#define DD_5T(n, d, r, expr) \
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DD_CASE_I(4, expr) \
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DD_4T(n, d, r, expr)
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#define DD_6T(n, d, r, expr) \
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DD_CASE_I(5, expr) \
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DD_5T(n, d, r, expr)
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#define DD_7T(n, d, r, expr) \
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DD_CASE_I(6, expr) \
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DD_6T(n, d, r, expr)
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#define DD_8T(n, d, r, expr) \
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DD_CASE_I(7, expr) \
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DD_7T(n, d, r, expr)
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#define DD(n, d, r, expr) \
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DD_SWITCH(n, d, r, expr) \
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DD_##d##T(n, d, r, expr)
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#endif
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