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ft_itoa.c
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ft_itoa.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_itoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: Jev <jsouza-c@student.42sp.org.br> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/09/26 21:47:34 by Jev #+# #+# */
/* Updated: 2021/10/28 18:46:48 by Jev ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static int array_size(int num)
{
int size;
size = 0;
if (num < 0)
{
size++;
num = -num;
}
while (num != 0)
{
size++;
num = num / 10;
}
return (size);
}
char *ft_itoa(int n)
{
char *string;
int len;
if (n == 0)
return (ft_strdup("0"));
if (n == -2147483648)
return (ft_strdup("-2147483648"));
len = array_size(n);
string = (char *)malloc((len + 1) * sizeof(char));
if (string == NULL)
return (NULL);
string[len--] = '\0';
if (n < 0)
{
string[0] = '-';
n = -n;
}
while (n)
{
string[len--] = ((n % 10) + '0');
n = n / 10;
}
return (string);
}