ft_itoa.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: adamarqu <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/21 11:39:15 by adamarqu          #+#    #+#             */
/*   Updated: 2024/10/21 11:39:17 by adamarqu         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	get_num_len(int n)
{
	int	len;

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

char	*ft_itoa(int n)
{
	char			*str;
	int				len;
	unsigned int	num;

	len = get_num_len(n);
	str = ft_calloc(len + 1, sizeof(char));
	if (!str)
		return (NULL);
	if (n < 0)
		num = -n;
	else
		num = n;
	while (len > 0)
	{
		len--;
		str[len] = (num % 10) + '0';
		num /= 10;
	}
	if (n < 0)
		str[0] = '-';
	return (str);
}