/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: vvobis <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/04/05 20:16:48 by vvobis            #+#    #+#             */
/*   Updated: 2024/04/11 14:48:59 by vvobis           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int    get_len(int n)
{
    int        i;

    if (n < 0)
        n = -n;
    i = 0;
    while (n)
    {
        i++;
        n /= 10;
    }
    return (i);
}

static char    *is_negative(int n)
{
    int        i;
    char    *num;

    i = get_len(n);
    num = malloc(sizeof(*num) * i + 2);
    if (!num)
        return (NULL);
    num[i + 1] = 0;
    while (n)
    {
        num[i--] = -(n % 10) + 48;
        n /= 10;
    }
    num[i] = 0x2d;
    return (num);
}

static char    *is_positive(int n)
{
    int        i;
    char    *num;

    i = get_len(n);
    num = malloc(sizeof(*num) * i + 1);
    if (!num)
        return (NULL);
    num[i--] = 0;
    while (n)
    {
        num[i--] = (n % 10) + 48;
        n /= 10;
    }
    return (num);
}

char    *ft_itoa(int n)
{
    if (n == 0)
        return (ft_strdup("0"));
    else if (n < 0)
        return (is_negative(n));
    else
        return (is_positive(n));
}