ft_atoi.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: raphalme <raphalme@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/12/29 18:54:00 by raphalme          #+#    #+#             */
/*   Updated: 2026/04/14 11:01:30 by raphalme         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
int ft_atoi(const char *str)
{
    int     res;
    int     sign;
    int     i;
 
    res = 0;
    sign = 1;
    i = 0;
    while ((str[i] >= 9 && str[i] <= 13) || str[i] == 32)
        i++;
    if (str[i] == '-' || str[i] == '+')
    {
        if (str[i] == '-')
            sign = -1;
        i++;
    }
    while (str[i] >= '0' && str[i] <= '9')
    {
        res = res * 10 + (str[i] - '0');
        i++;
    }
    return (res * sign);
}