Libft/ft_itoa.c at main · codebit-hub/Libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dporhomo <dporhomo@student.42prague.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/11/17 12:50:39 by dporhomo          #+#    #+#             */
/*   Updated: 2025/11/24 10:07:16 by dporhomo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	ft_get_size(long n);

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

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

static int	ft_get_size(long n)
{
	int	size;

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