Decode Status Register into Human-Readable Flags

Code

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

#define BIT(n) (1U << (n))

typedef struct {
    uint8_t bit;
    const char *name;
} StatusFlag;

static const StatusFlag status_flags[] = {
    {0, "Power On"},
    {1, "Error"},
    {2, "Tx Ready"},
    {3, "Rx Ready"},
    {4, "Overheat"},
    {5, "Undervoltage"},
    {6, "Timeout"},
    {7, "Reserved"}
};

void decode_status(uint8_t status_reg) {
    for (int i = 0; i < 8; i++) {
        if (status_reg & BIT(status_flags[i].bit)) {
            printf("%s\n", status_flags[i].name);
        }
    }
}

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

Solving Approach