ft_itoa.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kokaimov <kokaimov@student.42berlin.de>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/11/17 16:30:56 by kokaimov          #+#    #+#             */
/*   Updated: 2023/11/17 16:31:57 by kokaimov         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	int_len(int n)
{
	int	len;

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

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

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