26. Extract and Modify Field in a 32-bit Register

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

uint32_t update_register(uint32_t reg) {
    uint32_t mask = 0x1f << 10;
    uint8_t data = (reg & mask) >> 10;
    if (data >= 0x1f){
        reg |= mask;
    }else{
        reg &= ~mask;
        ++data;
        reg |= (data << 10);
    }
    return reg;
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    uint32_t updated = update_register(reg);
    printf("%u", updated);
    return 0;
}