Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    
    uint32_t mask = (1 << 5) - 1;
    uint32_t fieldVal = (reg >> 10) & mask;

    if (fieldVal < 31) {
        fieldVal++;
        reg &= ~(mask << 10);
        reg |= (fieldVal << 10);
    }
    
    return reg;
}

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

Solving Approach