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skeletton untested project

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thrieg 2025-12-11 06:18:16 +01:00
commit 6fc620e8f4
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libft/ft_utoa.c Executable file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_utoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: thrieg <thrieg@student.42mulhouse.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/10/22 17:36:09 by thrieg #+# #+# */
/* Updated: 2025/02/16 19:05:38 by thrieg ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static size_t nb_digits(unsigned int n)
{
size_t i;
i = 0;
while (n > 0)
{
i++;
n /= 10;
}
return (i);
}
static void recursive_utoa(unsigned int n, char *ret, size_t *index)
{
if (n > 9)
recursive_utoa(n / 10, ret, index);
ret[(*index)++] = (n % 10) + '0';
}
//converts an unsigned int to a string, returns NULL if an allocation fails
//works for any size of unsigned int (future-proof)
char *ft_utoa(unsigned int n)
{
char *ret;
size_t index;
if (n == 0)
return (ft_strdup("0"));
ret = malloc(sizeof(char) * (nb_digits(n) + 1));
if (!ret)
return (NULL);
index = 0;
recursive_utoa(n, ret, &index);
ret[index] = '\0';
return (ret);
}