Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    uint8_t field = ((reg >> 10) & ((1 << 5) - 1));
    if(field < 31) {
        // Clear the original field
        reg &= ~(((1 << 5) - 1) << 10);
        // Update the field
        reg |= (((field + 1) & ((1 << 5) - 1)) << 10);
    }

    return reg;
}

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

Solving Approach