72 lines
2.7 KiB
C
72 lines
2.7 KiB
C
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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#undef MIN
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#undef MAX
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#ifdef __cplusplus
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#ifndef _MINMAX_H_
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#define _MINMAX_H_
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extern "C++" {
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// C++11 solution that is standards compliant. Return type is deduced automatically
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template <class L, class R> static inline constexpr auto MIN(const L lhs, const R rhs) -> decltype(lhs + rhs) {
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return lhs < rhs ? lhs : rhs;
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}
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template <class L, class R> static inline constexpr auto MAX(const L lhs, const R rhs) -> decltype(lhs + rhs) {
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return lhs > rhs ? lhs : rhs;
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}
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template<class T, class ... Ts> static inline constexpr const T MIN(T V, Ts... Vs) { return MIN(V, MIN(Vs...)); }
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template<class T, class ... Ts> static inline constexpr const T MAX(T V, Ts... Vs) { return MAX(V, MAX(Vs...)); }
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}
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#endif
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#else
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// NUM_ARGS(...) evaluates to the number of arguments
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#define _NUM_ARGS(X,X6,X5,X4,X3,X2,X1,N,...) N
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#define NUM_ARGS(...) _NUM_ARGS(0, __VA_ARGS__ ,6,5,4,3,2,1,0)
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#define MIN_2(a,b) ({__typeof__(a) _a = (a); __typeof__(b) _b = (b); _a < _b ? _a : _b;})
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#define MIN_3(a,...) MIN_2(a,MIN_2(__VA_ARGS__))
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#define MIN_4(a,...) MIN_2(a,MIN_3(__VA_ARGS__))
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#define MIN_5(a,...) MIN_2(a,MIN_4(__VA_ARGS__))
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#define MIN_6(a,...) MIN_2(a,MIN_5(__VA_ARGS__))
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#define __MIN_N(N, ...) MIN_ ## N(__VA_ARGS__)
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#define _MIN_N(N, ...) __MIN_N(N, __VA_ARGS__)
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#define MIN(...) _MIN_N(NUM_ARGS(__VA_ARGS__), __VA_ARGS__)
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#define MAX_2(a,b) ({__typeof__(a) _a = (a); __typeof__(b) _b = (b); _a > _b ? _a : _b;})
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#define MAX_3(a,...) MAX_2(a,MAX_2(__VA_ARGS__))
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#define MAX_4(a,...) MAX_2(a,MAX_3(__VA_ARGS__))
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#define MAX_5(a,...) MAX_2(a,MAX_4(__VA_ARGS__))
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#define MAX_6(a,...) MAX_2(a,MAX_5(__VA_ARGS__))
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#define __MAX_N(N, ...) MAX_ ## N(__VA_ARGS__)
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#define _MAX_N(N, ...) __MAX_N(N, __VA_ARGS__)
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#define MAX(...) _MAX_N(NUM_ARGS(__VA_ARGS__), __VA_ARGS__)
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#endif
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