Detect Circular Pattern Match

#include <stdio.h>
#include <stdint.h>

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    uint16_t a,b;
    uint8_t i;
    for(i=0;i<=15;i++){
        a = reg<<(16-i);
        b = (reg>>i) | a;
        if(b==target){
            return 1;
            break;
        }
    }
    if(i>15){
        return 0;
    }}

int main() {
    uint16_t reg, target;
    scanf("%hu %hu", &reg, &target);
    printf("%hhu", is_circular_match(reg, target));
    return 0;
}