Convert Binary String to Integer Without strtol function or Libraries

Code

#include <stdio.h>
#include <stdint.h>
#include <math.h>
uint16_t binary_to_uint(const char *str) {
    uint16_t v=0;
    int i=0;
    while(str[i]!=0){
        if(str[i]=='1'){
            v=(v<<1)|1;
        }
        else{
            v=v<<1;
        }
        i++;
    }
    
    return v;
}

int main() {
    char bin[20];
    scanf("%s", bin);

    printf("%u", binary_to_uint(bin));
    return 0;
}

Solving Approach