/*
    generatori random 'umani' per uniforme discreta e continua
    
    File con sole funzioni

    Compilare con "gcc -c random_lib.c"

*/

#include <stdio.h>
#include <stdlib.h>    // per la random
#include <time.h>      // per il seed

//----------------------------------------------

void setRandomSeed( unsigned RandomSeed) {
  time_t t;

  if (RandomSeed == 0 ) {     // se == 0 si usa il tempo
     RandomSeed = (unsigned) time(&t);
  }

  printf("seed %u\n", RandomSeed );
  srand( RandomSeed );
}

int irunif(int min, int max) {
  
  if(min >= max) return(0);
  
  return( min + rand() % (max-min+1) );
}

//---------------------------------------------
float frunif(float min, float max) {
  float rzerouno;
  
  if(min >= max) return(0);

  rzerouno = (float) rand() / (float) RAND_MAX;
  
  return( min + rzerouno * (max-min) );
}