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ft_itoa.c
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ft_itoa.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_itoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mschumac <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2017/06/24 01:05:10 by mschumac #+# #+# */
/* Updated: 2017/06/28 22:24:01 by mschumac ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static int get_number_of_digits(int number)
{
int counter;
counter = 1;
while (number /= 10)
counter++;
return (counter);
}
char *ft_itoa(int n)
{
char *result;
char is_negative;
int number_of_digits;
if (n == -2147483648)
return (ft_strcpy(ft_strnew(11), "-2147483648"));
is_negative = 0;
if (n < 0)
{
is_negative = 1;
n = -n;
}
number_of_digits = get_number_of_digits(n);
result = ft_strnew(is_negative + number_of_digits);
if (result == NULL)
return (NULL);
if (is_negative)
result[0] = '-';
while (number_of_digits--)
{
result[number_of_digits + is_negative] = n % 10 + '0';
n /= 10;
}
return (result);
}