Decode Status Register into Human-Readable Flags

Code

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

#define FLAG_POWER_ON(reg)  ((reg)&(1<<0))
#define FLAG_ERROR(reg)     ((reg)&(1<<1))
#define FLAG_TX_READY(reg)  ((reg)&(1<<2))
#define FLAG_RX_READY(reg)  ((reg)&(1<<3))
#define FLAG_OVERHEAT(reg)  ((reg)&(1<<4))
#define FLAG_UNDERVOL(reg)  ((reg)&(1<<5))
#define FLAG_TIMEOUT(reg)   ((reg)&(1<<6))
#define FLAG_RESERVED(reg)  ((reg)&(1<<7))

void decode_status(uint8_t status_reg) {
    if(FLAG_POWER_ON(status_reg)) printf("Power On\n");
    if(FLAG_ERROR(status_reg)) printf("Error\n");
    if(FLAG_TX_READY(status_reg)) printf("Tx Ready\n");
    if(FLAG_RX_READY(status_reg)) printf("Rx Ready\n");
    if(FLAG_OVERHEAT(status_reg)) printf("Overheat\n");
    if(FLAG_UNDERVOL(status_reg)) printf("Undervoltage\n");
    if(FLAG_TIMEOUT(status_reg)) printf("Timeout\n");
    if(FLAG_RESERVED(status_reg)) printf("Reserved\n");
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    decode_status(reg);
    return 0;
}

Solving Approach