ft_itoa.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: azaghlou <azaghlou@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/10/14 21:14:54 by azaghlou          #+#    #+#             */
/*   Updated: 2022/10/25 02:35:47 by azaghlou         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	lennn(long nn)
{
	int	i;

	i = 1;
	if (nn < 0)
	{
		nn *= -1;
		i++;
	}
	while (nn >= 10)
	{
		nn = nn / 10;
		i++;
	}
	return (i);
}

static char	*ft_putzero(char *str)
{
	str[0] = '0';
	str[1] = '\0';
	return (str);
}

char	*ft_itoa(int n)
{
	long	nb;
	char	*aptx;
	int		i;

	nb = n;
	i = lennn(nb);
	aptx = malloc(sizeof(char) * (lennn(nb) + 1));
	if (!aptx)
		return (NULL);
	if (nb == 0)
		return (ft_putzero(aptx));
	if (nb < 0)
	{
		aptx[0] = '-';
		nb = nb * -1;
	}
	aptx[i] = '\0';
	while (nb > 0 && i--)
	{
		aptx[i] = ((nb % 10) + '0');
		nb = nb / 10;
	}
	return (aptx);
}

// int main()
// {
//     printf("%s",ft_itoa(0));
// }