Detect Circular Pattern Match

Code

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    int iteration = 16;
    bool flag = false;
    while(iteration--){
        if((reg & target) == reg && (reg & target) == target){
            flag = true;
        }
        if(flag) return 1;
        reg =(reg << 1) | (reg >> (16-1));
    }
    return 0;
}

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

Solving Approach