Validate Configuration Register Layout

Code

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    int val_enable = cfg->reg & 0x0001;
    int val_mode = (cfg->reg >> 1) & 0x0001;
    int val_p = (cfg->reg >> 2) & 0x0003;
    int val_r = (cfg->reg >> 4) & 0x0FFF;
    if(val_enable == 1&& val_p != 3&&val_r == 0) return 1;
    return 0;
}

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

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

    return 0;
}

Solving Approach