index of 1st 1 in infinte array

#include <stdio.h>
#include <stdlib.h>

int binarySrc(int arr[], int low, int high) {
    int mid;
    while (low <= high) {
        mid = (low + high) / 2;
        if (arr[mid] && (!mid || !arr[mid - 1])) {
            break;
        } else if (!arr[mid]) {
            low = mid + 1;
        } else {
            high = mid - 1;
        }
    }
    return mid;
}

int posOfFi1(int arr[]) {
    int low = 0, high = 1;
    while (!arr[high]) {
        low = high;
        high *= 2;
    }
    return binarySrc(arr, low, high);
}

int main() {
    //simulate an infinite array
    int arr[] = {
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
        1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    };
    printf("idx of 1st 1: %d", posOfFi1(arr));
    return 0;
}