text: /* Teensyduino Core Library
   * http://www.pjrc.com/teensy/
   * Copyright (c) 2017 PJRC.COM, LLC.
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * 1. The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * 2. If the Software is incorporated into a build system that allows
   * selection among a list of target devices, then similar target
   * devices manufactured by PJRC.COM must be included in the list of
   * target devices and selectable in the same manner.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #ifndef Wiring_h
  #define Wiring_h
  
  #include <stdint.h>
  #include <stdlib.h>
  #include "binary.h"
  #include "core_id.h"
  #include "core_pins.h"
  
  // type_traits interferes with min() and other defines
  // include it early, so we can define these later
  // for Arduino compatibility
  #ifdef __cplusplus
  #include <type_traits>
  // when the input number is an integer type, do all math as 32 bit signed long
  template <class T, class A, class B, class C, class D>
  long map(T _x, A _in_min, B _in_max, C _out_min, D _out_max, typename std::enable_if<std::is_integral<T>::value >::type* = 0)
  {
  	long x = _x, in_min = _in_min, in_max = _in_max, out_min = _out_min, out_max = _out_max;
  	// Arduino's traditional algorithm
  	//return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
  	// st42's suggestion: https://github.com/arduino/Arduino/issues/2466#issuecomment-69873889
  	// more conversation:
  	// https://forum.pjrc.com/threads/44503-map()-function-improvements
  	if ((in_max - in_min) > (out_max - out_min)) {
  		return (x - in_min) * (out_max - out_min+1) / (in_max - in_min+1) + out_min;
  	} else {
  		return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
  	}
  }
  // when the input is a float or double, do all math using the input's type
  template <class T, class A, class B, class C, class D>
  T map(T x, A in_min, B in_max, C out_min, D out_max, typename std::enable_if<std::is_floating_point<T>::value >::type* = 0)
  {
  	return (x - (T)in_min) * ((T)out_max - (T)out_min) / ((T)in_max - (T)in_min) + (T)out_min;
  }
  //#include <algorithm> // this isn't really needed, is it?  (slows down compiling)
  #include <utility>
  // https://forum.pjrc.com/threads/44596-Teensyduino-1-37-Beta-2-(Arduino-1-8-3-support)?p=145150&viewfull=1#post145150
  template<class A, class B>
  constexpr auto min(A&& a, B&& b) -> decltype(a < b ? std::forward<A>(a) : std::forward<B>(b)) {
    return a < b ? std::forward<A>(a) : std::forward<B>(b);
  }
  template<class A, class B>
  constexpr auto max(A&& a, B&& b) -> decltype(a < b ? std::forward<A>(a) : std::forward<B>(b)) {
    return a >= b ? std::forward<A>(a) : std::forward<B>(b);
  }
  #else // not C++
  #define min(a, b) ({ \
    typeof(a) _a = (a); \
    typeof(b) _b = (b); \
    (_a < _b) ? _a : _b; \
  })
  #define max(a, b) ({ \
    typeof(a) _a = (a); \
    typeof(b) _b = (b); \
    (_a > _b) ? _a : _b; \
  })
  #endif
  
  
  #ifdef PI
  #undef PI
  #endif
  #define PI 3.1415926535897932384626433832795
  #define HALF_PI 1.5707963267948966192313216916398
  #define TWO_PI 6.283185307179586476925286766559
  #define DEG_TO_RAD 0.017453292519943295769236907684886
  #define RAD_TO_DEG 57.295779513082320876798154814105
  
  #ifndef M_PI
  #define M_PI 3.1415926535897932384626433832795
  #endif
  #ifndef M_SQRT2
  #define M_SQRT2 1.4142135623730950488016887
  #endif
  
  #define SERIAL  0
  #define DISPLAY 1
  
  // undefine stdlib's abs if encountered
  #ifdef abs
  #undef abs
  #endif
  
  #if __cplusplus >= 201103L && defined(__STRICT_ANSI__)
  #define typeof(a) decltype(a)
  #endif
  
  #define abs(x) ({ \
    typeof(x) _x = (x); \
    (_x > 0) ? _x : -_x; \
  })
  #define constrain(amt, low, high) ({ \
    typeof(amt) _amt = (amt); \
    typeof(low) _low = (low); \
    typeof(high) _high = (high); \
    (_amt < _low) ? _low : ((_amt > _high) ? _high : _amt); \
  })
  #define round(x) ({ \
    typeof(x) _x = (x); \
    (_x>=0) ? (long)(_x+0.5) : (long)(_x-0.5); \
  })
  #define radians(deg) ((deg)*DEG_TO_RAD)
  #define degrees(rad) ((rad)*RAD_TO_DEG)
  #define sq(x) ({ \
    typeof(x) _x = (x); \
    _x * _x; \
  })
  
  #ifdef __cplusplus
  extern "C"{
  #endif
  
  extern double exp10(double x);
  extern float exp10f(float x);
  extern long double exp10l(long double x);
  extern double pow10(double x);
  extern float pow10f(float x);
  extern long double pow10l(long double x);
  
  #define stricmp(a, b) strcasecmp(a, b)
  
  #define sei() __enable_irq()
  #define cli() __disable_irq()
  #define interrupts() __enable_irq()
  #define noInterrupts() __disable_irq()
  
  #define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
  #define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
  #define microsecondsToClockCycles(a) ( (a) * clockCyclesPerMicrosecond() )
  
  #define lowByte(w) ((uint8_t)((w) & 0xFF))
  #define highByte(w) ((uint8_t)((w) >> 8))
  
  #define bitRead(value, bit) (((value) >> (bit)) & 0x01)
  #define bitSet(value, bit) ((value) |= (1UL << (bit)))
  #define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
  #define bitWrite(value, bit, bitvalue) ((bitvalue) ? bitSet((value), (bit)) : bitClear((value), (bit)))
  
  typedef unsigned int word;
  
  #define bit(b) (1UL << (b))
  
  typedef uint8_t byte;
  
  uint32_t pulseIn(uint8_t pin, uint8_t state, uint32_t timeout);
  void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, byte val);
  
  void setup(void);
  void loop(void);
  
  #ifdef __cplusplus
  } // extern "C"
  #endif
  
  // fix C++ boolean issue
  // https://github.com/arduino/Arduino/pull/2151
  #ifdef __cplusplus
  typedef bool boolean;
  #else
  typedef uint8_t boolean;
  #define false 0
  #define true (!false)
  #endif
  
  #endif
  