Validate Configuration Register Layout

Code

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access

    if (!((cfg->reg) & (1 << 0)))
    {
        return 0;
    }

    if (((cfg->reg >> 2) & (0x3)) == 0x3)
    {
        return 0;
    }

    if (((cfg->reg >> 4) & 0xFFF) != 0)
    {
        return 0;
    }

    return 1;
}

int main() {
    ConfigRegister cfg;
    scanf("%hx", &cfg.reg);

    int result = validate_config(&cfg);
    printf("%d", result);

    return 0;
}

Solving Approach