Detect Circular Pattern Match

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    // Your code here
    int i, pos, size;
    size = 8*sizeof(uint16_t);
    for(i=0; i<size; i++){
        if(reg == target){
            return 1;
        }
        reg = (reg<<1)|(reg>>(size-1));
    }
    return 0;
}

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