ft_putnbr_fd

Info

The function outputs the integer ’n’ to the given File Descriptor.

#include <unistd.h>
#include <limits.h>
 
void ft_putnbr_fd(int n, int fd)
{
    if (n == INT_MIN)
    {
        write(fd, "-2147483648", 11);
        return;
    }
    if (n < 0)
    {
        write(fd, "-", 1);
        n = -n;
    }
    if (n > 9)
        ft_putnbr_fd(n / 10, fd);
    char c = (n % 10) + '0';
    write(fd, &c, 1);
}

We have to handle INT_MIN separately because the absolute value of INT_MIN is out of the range of int. Therefore, we cannot convert it to a positive number without causing an Integer Overflow.