// file: lecture_09/example_00.cc
//
// a simple function that doesn't do much
//

// system include files
//
#include "example.h"

// function: my_function
//
// arguments:
//  long arg1: the first argument
//  long arg2: the second argument
//
// return: a bool indicating status
//
bool my_function(long argv1, long argv2) {

  // how many bytes is a long integer
  //
  fprintf(stdout, "a long integer is %d bytes\n", sizeof(argv1));
  fprintf(stdout, "a short integer is %d bytes\n", sizeof(short int));
  fprintf(stdout, "a float is %d bytes\n", sizeof(float));
  fprintf(stdout, "a double is %d bytes\n", sizeof(double));

  // convert the arguments to unsigned char
  //
  signed char a = (signed char)argv1;
  signed char b = (signed char)argv2;

  // do some bit-level stuff
  //
  fprintf(stdout, "a = %d, b = %d\n", a, b);
  fprintf(stdout, "a & b = %d\n", a & b); 
  fprintf(stdout, "a | b = %d\n", a | b); 
  fprintf(stdout, "a ^ b = %d\n", a ^ b); 
  fprintf(stdout, "~a = %d\n", ~a);   
  fprintf(stdout, "a << 1 = %d\n", a << 1);
  fprintf(stdout, "a >> 1 = %d\n", a >> 1);

  // short integers
  //
  short int s = argv1;
  fprintf(stdout, "s << 1 = %d\n", s << 1);
  fprintf(stdout, "s >> 1 = %d\n", s >> 1);

  // short integers
  //
  /*
  short int ss = (argv1 * argv2) & argv1;
  fprintf(stdout, "ss = %ld\n", ss);
  */

  // exit gracefully
  //
  return true;
}