Macro-Based Register Config Helper

Code

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

// Define macros here
uint16_t enable_macro(uint8_t enable, uint16_t reg) {
    if(enable)
        return reg |= 1;
    else
        return reg &= ~1;
}

uint16_t mode_macro(uint8_t mode, uint16_t reg) {
    if(mode)
        return reg |= (mode << 1);
    else   
        return reg &= ~(3 << 1);
}

uint16_t speed_macro(uint8_t speed, uint16_t reg) {
    if(speed)
        return reg |= (speed << 3);
    else   
        return reg &= ~(7 << 3);
}


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t reg = 0;
    reg = enable_macro( enable,  reg);
    reg = mode_macro( mode,  reg);
    reg = speed_macro( speed,  reg);
    reg &= ~(3 << 6);
    return reg;
}

int main() {
    uint8_t enable, mode, speed;
    scanf("%hhu %hhu %hhu", &enable, &mode, &speed);

    uint16_t reg = build_register(enable, mode, speed);
    printf("%u", reg);
    return 0;
}

Solving Approach