Validate Configuration Register Layout

Code

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    unsigned short reg = cfg->reg;
    int enable = (reg & 0x1) == 1;
    int priority = ((reg >> 2) & 0x3) != 3;
    int reserved = (0xFFF0 & reg) == 0;
    return (enable && priority && reserved)?1:0;
}

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

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

    return 0;
}

Solving Approach