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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 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/>.
*
*/
#ifndef MACROS_H
#define MACROS_H
#define NUM_AXIS 4
#define XYZE 4
#define ABC 3
#define XYZ 3
#define FORCE_INLINE __attribute__((always_inline)) inline
// Bracket code that shouldn't be interrupted
#ifndef CRITICAL_SECTION_START
#define CRITICAL_SECTION_START unsigned char _sreg = SREG; cli();
#define CRITICAL_SECTION_END SREG = _sreg;
#endif
// Clock speed factor
#define CYCLES_PER_MICROSECOND (F_CPU / 1000000UL) // 16 or 20
// Remove compiler warning on an unused variable
#define UNUSED(x) (void) (x)
// Macros to make a string from a macro
#define STRINGIFY_(M) #M
#define STRINGIFY(M) STRINGIFY_(M)
// Macros for bit masks
#define TEST(n,b) (((n)&_BV(b))!=0)
#define SBI(n,b) (n |= _BV(b))
#define CBI(n,b) (n &= ~_BV(b))
#define SET_BIT(n,b,value) (n) ^= ((-value)^(n)) & (_BV(b))
// Macros for maths shortcuts
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#define RADIANS(d) ((d)*M_PI/180.0)
#define DEGREES(r) ((r)*180.0/M_PI)
#define HYPOT2(x,y) (sq(x)+sq(y))
#define HYPOT(x,y) sqrt(HYPOT2(x,y))
// Macros to contrain values
#define NOLESS(v,n) do{ if (v < n) v = n; }while(0)
#define NOMORE(v,n) do{ if (v > n) v = n; }while(0)
// Macros to support option testing
#define _CAT(a, ...) a ## __VA_ARGS__
#define SWITCH_ENABLED_false 0
#define SWITCH_ENABLED_true 1
#define SWITCH_ENABLED_0 0
#define SWITCH_ENABLED_1 1
#define SWITCH_ENABLED_ 1
#define ENABLED(b) _CAT(SWITCH_ENABLED_, b)
#define DISABLED(b) (!_CAT(SWITCH_ENABLED_, b))
#define WITHIN(V,L,H) ((V) >= (L) && (V) <= (H))
#define NUMERIC(a) WITHIN(a, '0', '9')
#define NUMERIC_SIGNED(a) (NUMERIC(a) || (a) == '-')
#define COUNT(a) (sizeof(a)/sizeof(*a))
#define ZERO(a) memset(a,0,sizeof(a))
#define COPY(a,b) memcpy(a,b,min(sizeof(a),sizeof(b)))
// Macros for initializing arrays
#define ARRAY_6(v1, v2, v3, v4, v5, v6, ...) { v1, v2, v3, v4, v5, v6 }
#define ARRAY_5(v1, v2, v3, v4, v5, ...) { v1, v2, v3, v4, v5 }
#define ARRAY_4(v1, v2, v3, v4, ...) { v1, v2, v3, v4 }
#define ARRAY_3(v1, v2, v3, ...) { v1, v2, v3 }
#define ARRAY_2(v1, v2, ...) { v1, v2 }
#define ARRAY_1(v1, ...) { v1 }
#define _ARRAY_N(N, ...) ARRAY_ ##N(__VA_ARGS__)
#define ARRAY_N(N, ...) _ARRAY_N(N, __VA_ARGS__)
// Macros for adding
#define INC_0 1
#define INC_1 2
#define INC_2 3
#define INC_3 4
#define INC_4 5
#define INC_5 6
#define INC_6 7
#define INC_7 8
#define INC_8 9
#define INCREMENT_(n) INC_ ##n
#define INCREMENT(n) INCREMENT_(n)
// Macros for subtracting
#define DEC_1 0
#define DEC_2 1
#define DEC_3 2
#define DEC_4 3
#define DEC_5 4
#define DEC_6 5
#define DEC_7 6
#define DEC_8 7
#define DEC_9 8
#define DECREMENT_(n) DEC_ ##n
#define DECREMENT(n) DECREMENT_(n)
#define PIN_EXISTS(PN) (defined(PN ##_PIN) && PN ##_PIN >= 0)
#define PENDING(NOW,SOON) ((long)(NOW-(SOON))<0)
#define ELAPSED(NOW,SOON) (!PENDING(NOW,SOON))
#define NOOP do{} while(0)
#define CEILING(x,y) (((x) + (y) - 1) / (y))
#define MIN3(a, b, c) min(min(a, b), c)
#define MIN4(a, b, c, d) min(min(a, b), min(c, d))
#define MAX3(a, b, c) max(max(a, b), c)
#define MAX4(a, b, c, d) max(max(a, b), max(c, d))
#define UNEAR_ZERO(x) ((x) < 0.000001)
#define NEAR_ZERO(x) WITHIN(x, -0.000001, 0.000001)
#define NEAR(x,y) NEAR_ZERO((x)-(y))
#define RECIPROCAL(x) (NEAR_ZERO(x) ? 0.0 : 1.0 / (x))
#endif //__MACROS_H