ft_itoa.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_itoa.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: raphalme <raphalme@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/12/29 19:06:00 by raphalme          #+#    #+#             */
/*   Updated: 2026/04/14 10:45:22 by raphalme         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include <stdlib.h>
 
static size_t   ft_num_len(int n);
 
char    *ft_itoa(int n)
{
    char            *str;
    size_t          len;
    unsigned int    nb;
 
    len = ft_num_len(n);
    str = (char *)malloc(sizeof(char) * (len + 1));
    if (!str)
        return (NULL);
    str[len] = '\0';
    if (n < 0)
    {
        str[0] = '-';
        nb = -n;
    }
    else
        nb = n;
    if (nb == 0)
        str[0] = '0';
    while (nb != 0)
    {
        str[--len] = (nb % 10) + '0';
        nb /= 10;
    }
    return (str);
}
 
static size_t   ft_num_len(int n)
{
    size_t  len;
 
    len = 0;
    if (n <= 0)
        len++;
    while (n != 0)
    {
        n /= 10;
        len++;
    }
    return (len);
}