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ft_itoa.c
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ft_itoa.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_itoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: ldaniel- <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/06/23 21:08:27 by ldaniel- #+# #+# */
/* Updated: 2021/06/24 19:52:05 by ldaniel- ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static size_t int_len(int i)
{
size_t len;
len = 0;
if (i == 0)
return (1);
while (i != 0)
{
len++;
i = i / 10;
}
return (len);
}
static char *negative(size_t n)
{
char *negative_str;
size_t size;
size = int_len(n);
negative_str = ft_calloc((size + 2), sizeof(char));
if (negative_str == NULL)
return (NULL);
negative_str[0] = '-';
n = n * -1;
while (n != 0)
{
negative_str[--size + 1] = (n % 10) + '0';
n = n / 10;
}
return (negative_str);
}
char *ft_itoa(int n)
{
char *str;
size_t size;
size = int_len(n);
if (n < 0)
{
return (negative(n));
}
str = ft_calloc(size + 1, sizeof(char));
if (str == NULL)
return (NULL);
if (n == 0)
str[--size] = (n % 10) + '0';
while (n != 0)
{
str[--size] = (n % 10) + '0';
n = n / 10;
}
return (str);
}