Libft/ft_atoi.c at main · tigran-sargsyan-w/Libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tsargsya <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/12/09 15:52:29 by tsargsya          #+#    #+#             */
/*   Updated: 2024/12/11 18:40:00 by tsargsya         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

int	ft_atoi(const char *nptr)
{
	int	res;
	int	sign;

	res = 0;
	sign = 1;
	while ((*nptr >= 9 && *nptr <= 13) || *nptr == ' ')
		nptr++;
	if (*nptr == '-' || *nptr == '+')
	{
		if (*nptr == '-')
			sign *= -1;
		nptr++;
	}
	while (*nptr >= '0' && *nptr <= '9')
	{
		res = (res * 10) + (*nptr - 48);
		nptr++;
	}
	return (res * sign);
}