77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    unsigned short reg = cfg->reg;
    unsigned short enable_status = reg & 0x1;
    unsigned short valid_status = (reg>>2) & 0x3;
    unsigned short all_status = (reg>>4) & 0b111111111111;

    if(enable_status == 1 && valid_status != 3 && all_status == 0)
        return 1;
    return 0;
}

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

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

    return 0;
}