Firmware2/Marlin/src/core/minmax.h
Scott Lahteine 49cf92dc36
Extended condition macros (#13419)
Allow `ENABLED`, `DISABLED`, `PIN_EXISTS`, and `BUTTON_EXISTS` to take multiple arguments. Also add:
- Alias `ANY(...)` for `!DISABLED(...)`
- Alias `ANY_PIN(...)` for `PIN_EXISTS(a) || PIN_EXISTS(b) ...`
- Alias `EITHER(A,B)` for `ANY(...)`
- Alias `ALL(...)` and `BOTH(A,B)` for `ENABLED(...)`
- `NONE(...)` for `DISABLED(...)`
2019-03-16 23:43:06 -05:00

80 lines
3.2 KiB
C++

/**
* Marlin 3D Printer Firmware
* Copyright (C) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#undef MIN
#undef MAX
// Use NUM_ARGS(__VA_ARGS__) to get the number of variadic arguments
#define _NUM_ARGS(_0,_24_,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1,N,...) N
#define NUM_ARGS(V...) _NUM_ARGS(0,V,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
#ifdef __cplusplus
#ifndef _MINMAX_H_
#define _MINMAX_H_
extern "C++" {
// C++11 solution that is standards compliant. Return type is deduced automatically
template <class L, class R> static inline constexpr auto MIN(const L lhs, const R rhs) -> decltype(lhs + rhs) {
return lhs < rhs ? lhs : rhs;
}
template <class L, class R> static inline constexpr auto MAX(const L lhs, const R rhs) -> decltype(lhs + rhs) {
return lhs > rhs ? lhs : rhs;
}
template<class T, class ... Ts> static inline constexpr const T MIN(T V, Ts... Vs) { return MIN(V, MIN(Vs...)); }
template<class T, class ... Ts> static inline constexpr const T MAX(T V, Ts... Vs) { return MAX(V, MAX(Vs...)); }
}
#endif
#else
#define MIN_2(a,b) ((a)<(b)?(a):(b))
#define MIN_3(a,...) MIN_2(a,MIN_2(__VA_ARGS__))
#define MIN_4(a,...) MIN_2(a,MIN_3(__VA_ARGS__))
#define MIN_5(a,...) MIN_2(a,MIN_4(__VA_ARGS__))
#define MIN_6(a,...) MIN_2(a,MIN_5(__VA_ARGS__))
#define MIN_7(a,...) MIN_2(a,MIN_6(__VA_ARGS__))
#define MIN_8(a,...) MIN_2(a,MIN_7(__VA_ARGS__))
#define MIN_9(a,...) MIN_2(a,MIN_8(__VA_ARGS__))
#define MIN_10(a,...) MIN_2(a,MIN_9(__VA_ARGS__))
#define __MIN_N(N, ...) MIN_##N(__VA_ARGS__)
#define _MIN_N(N, ...) __MIN_N(N,__VA_ARGS__)
#define MIN(...) _MIN_N(NUM_ARGS(__VA_ARGS__), __VA_ARGS__)
#define MAX_2(a,b) ((a)>(b)?(a):(b))
#define MAX_3(a,...) MAX_2(a,MAX_2(__VA_ARGS__))
#define MAX_4(a,...) MAX_2(a,MAX_3(__VA_ARGS__))
#define MAX_5(a,...) MAX_2(a,MAX_4(__VA_ARGS__))
#define MAX_6(a,...) MAX_2(a,MAX_5(__VA_ARGS__))
#define MAX_7(a,...) MAX_2(a,MAX_6(__VA_ARGS__))
#define MAX_8(a,...) MAX_2(a,MAX_7(__VA_ARGS__))
#define MAX_9(a,...) MAX_2(a,MAX_8(__VA_ARGS__))
#define MAX_10(a,...) MAX_2(a,MAX_9(__VA_ARGS__))
#define __MAX_N(N, ...) MAX_##N(__VA_ARGS__)
#define _MAX_N(N, ...) __MAX_N(N,__VA_ARGS__)
#define MAX(...) _MAX_N(NUM_ARGS(__VA_ARGS__), __VA_ARGS__)
#endif