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 field;

    // Extract bits 10-14
    field = (reg >> 10) & 0x1F;

    // Increment if less than 31
    if(field < 31) {
        field++;
    }

    // Clear old field
    reg &= ~(0x1F << 10);

    // Insert updated field
    reg |= (field << 10);

    return reg;
}

int main() {

    uint32_t reg;

    scanf("%u", &reg);

    uint32_t updated = update_register(reg);

    printf("%u\n", updated);

    return 0;
}