woody-woodpacker/ft_printf/libft/ft_u_itoa.c

51 lines
1.4 KiB
C

/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_u_itoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: pbonilla <eirodeis.lepnj@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/11/24 21:27:16 by pbonilla #+# #+# */
/* Updated: 2021/03/19 18:16:49 by pbonilla ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int number_u_len(unsigned long long n)
{
int size;
if (n == 0)
return (1);
size = 0;
n = -n;
++size;
while (n != 0)
{
n /= 10;
++size;
}
return (size);
}
char *ft_u_itoa(unsigned long long n)
{
unsigned long long long_n;
char *number;
int size;
long_n = n;
size = number_u_len(n);
if (!(number = malloc(sizeof(char) * (size + 1))))
return (NULL);
number[size] = 0;
--size;
while (size >= 0)
{
number[size] = '0' + (long_n % 10);
--size;
long_n /= 10;
}
return (number);
}