Libft/ft_itoa.c at master · rutgercap/Libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   ft_itoa.c                                          :+:    :+:            */
/*                                                     +:+                    */
/*   By: rcappend <rcappend@student.codam.nl>         +#+                     */
/*                                                   +#+                      */
/*   Created: 2020/11/02 11:36:52 by rcappend      #+#    #+#                 */
/*   Updated: 2021/11/03 14:23:37 by rcappend      ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	counter(int n)
{
	int		i;

	i = 1;
	if (n < 0)
		i++;
	while (n / 10 != 0)
	{
		i++;
		n = n / 10;
	}
	return (i);
}

char	*ft_itoa(int n)
{
	char	*ret;
	int		len;
	int		minus;

	minus = 0;
	if (n < 0)
		minus = 1;
	len = counter(n);
	ret = malloc(sizeof(unsigned char) * len + 1);
	if (!ret)
		return (NULL);
	ret[len] = '\0';
	while (len > minus)
	{
		len--;
		ret[len] = ft_abs((n % 10)) + '0';
		n = n / 10;
	}
	if (minus)
		ret[len - 1] = '-';
	return (ret);
}