/********************************************************************************
 * Description:
 * This file contains all the headers needed for the light and scotch sensor 
 * detection logic.
 ********************************************************************************
 * Changes:
 * Max. Heise, 07.05.2002, 15H50 - created by cut and paste from cruise2.c
 * MAHE, 13.05.2002, 12H40 - now compiling as project of separated source files
 ********************************************************************************/
#ifndef _SENSOR_H
#define _SENSOR_H

#include "error.h"

#define MAXSENSORS 3
#define MAXVALUES 5
typedef unsigned int SensorValue;
typedef char SensorIndex;
struct stru_sensor {
  SensorValue sensorValues[MAXVALUES];
  SensorValue highestValue;
  SensorValue lowestValue;
  SensorIndex insertIndex;
};
typedef struct stru_sensor Sensor;

Sensor * setSensorToZero(Sensor *const);
SensorValue _getSensorValue(const Sensor *const, const SensorIndex);
Sensor * _setSensorValue(Sensor *const, const SensorIndex, const SensorValue);
Sensor * setSensorHighestValue(Sensor *const, const SensorValue);
SensorValue getSensorHighestValue(const Sensor *const);
Sensor * setSensorLowestValue(Sensor *const, const SensorValue);
SensorValue getSensorLowestValue(const Sensor *const);
/* Sensor * _doSensorValuesShiftRight(Sensor *const); */
SensorValue _getSensorValuesAverage(const Sensor *const);
/* Sensor * pushSensorValue(Sensor *const, const SensorValue); */
unsigned char isSensorActive(const Sensor *const);
Sensor *insertSensorValue(Sensor *const, SensorValue);

extern unsigned char errorno;

#endif /* of _SENSOR_H */