// -------------------------------------------------------------------
// C Headers
// -------------------------------------------------------------------

#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <math.h>

// -------------------------------------------------------------------
// Local Headers
// -------------------------------------------------------------------

#include "util.h"

FILE *utilOpenFile(const char *fileName, const char *mode)
{
   if(!fileName || !mode)
      return(NULL);

#ifdef _MSC_VER

   FILE *f = NULL;

   errno_t returnValue = fopen_s(&f, fileName, mode);

   return(returnValue == 0 ? f : NULL);

#else

   return(fopen(fileName, mode));

#endif
}

int utilRandomValue(void)
{
   static bool first = true;

   if(first)
   {
      first = false;
      srand((int)time(NULL));
   }

   return(rand());
}

double utilDegreesToRadians(double degrees)
{
   return(degrees * M_PI / 180.0);
}

XY utilGetXY(double degrees, double radius, double xOffset, double yOffset)
{
   double theta = utilDegreesToRadians(degrees);

   XY value = { 0 };

   value.mX = xOffset + radius * cos(theta);
   value.mY = yOffset + radius * sin(theta);

   return(value);
}

int utilRound(double value)
{
   return((int)(value <= 0 ? value + 0.5 : value - 0.5));
}

void utilGetHMS(int *hourPtr, int *minutePtr, int *secondPtr)
{
   *hourPtr = *minutePtr = *secondPtr = 0;

   time_t now = { 0 };

   time(&now);

   struct tm *ptr = NULL;

#ifdef _MSC_VER

   struct tm theTime = { 0 };

   localtime_s(&theTime, &now);

   ptr = &theTime;

#else

   ptr = localtime(&now);

#endif

   *hourPtr   = ptr->tm_hour;
   *minutePtr = ptr->tm_min;
   *secondPtr = ptr->tm_sec;

   if(*hourPtr > 12)
      *hourPtr -= 12;
}