flip.c

/*
  Name:     flip.c
  Purpose:  Generating a sequence of pseudo-random bits.
  Author:   F. A. Saad
  Copyright (C) 2020 Feras A. Saad, All Rights Reserved.

  Released under Apache 2.0; refer to LICENSE.txt
*/

#include <stdlib.h>

#include "flip.h"

static int k = 30;
static int flip_word = 0;
static int flip_pos = 0;

int flip(void){
    if (flip_pos == 0) {
        flip_word = rand();
        flip_pos = k;
    }
    --flip_pos;
    return (flip_word >> flip_pos) & 1;
}