ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bjorge-m <bjorge-m@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/10/06 18:33:55 by bjorge-m          #+#    #+#             */
/*   Updated: 2023/10/12 19:57:12 by bjorge-m         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *nptr)
{
	int	i;
	int	sign;
	int	num;

	i = 0;
	sign = 1;
	num = 0;
	while ((nptr[i] >= 9 && nptr[i] <= 13) || (nptr[i] == 32))
		i++;
	if (nptr[i] == 45 || nptr[i] == 43)
	{
		if (nptr[i] == 45)
		{
			sign = -1;
		}
		i++;
	}
	while (ft_isdigit(nptr[i]))
	{
		num = num * 10 + nptr[i] - 48;
		i++;
	}
	return (num * sign);
}