Libft/ft_atoi.c at main · nramirez-f/Libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: joramire <joramire@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/09/27 16:48:58 by joramire          #+#    #+#             */
/*   Updated: 2022/09/27 16:53:42 by joramire         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

int	ft_atoi(const char *str)
{
	int	i;
	int	result;
	int	s;

	i = 0;
	result = 0;
	s = 1;
	while (str[i] == 32 || (str[i] >= 9 && str[i] <= 13))
		i++;
	if (str[i] == 43 || str [i] == 45)
	{
		if (str[i] == 45)
			s = s * (-1);
		i++;
	}
	while (str[i] >= 48 && str[i] <= 57)
	{
		result = (result * 10) + (str[i] - 48);
		i++;
	}
	return (s * result);
}