Detect Circular Pattern Match

Code

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

uint16_t rotate_left(uint16_t reg, uint8_t len) {

    uint16_t tempReg = 0;

    tempReg |= (reg >> (16-len));
    tempReg |= (reg << len);
    return tempReg;
}

uint16_t rotate_right(uint16_t reg, uint8_t len) {

    uint16_t tempReg = 0;

    tempReg |= (reg << (16-len));
    tempReg |= (reg >> len);
    return tempReg;
}

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    // Your code here
    // rotate right by 1-2-3..32 & match
    // rotate left  by 1-2-3..32 & match
    for (int len = 0; len <= 16; len++) {
        if ((target == rotate_left(reg, len)) || (target == rotate_right(reg, len))) {
            return 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