ft_itoa.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sbin-jef <sbin-jef@student.42kl.edu.my>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/28 15:16:57 by sbin-jef          #+#    #+#             */
/*   Updated: 2024/06/29 23:33:47 by sbin-jef         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <stdlib.h>
#include "libft.h"

static size_t	get_num_len(int n)
{
	size_t	len;

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

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

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