ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: wtaylor <wtaylor@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/11/06 19:05:59 by wtaylor           #+#    #+#             */
/*   Updated: 2020/11/08 14:55:19 by wtaylor          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int		ft_atoi(const char *s)
{
	int i;
	int minus;

	i = 0;
	minus = 1;
	while (*s && (*s == ' ' || *s == '\n' || *s == '\t' ||
			*s == '\v' || *s == '\f' || *s == '\r'))
		s++;
	if (*s == '-' || *s == '+')
	{
		if (*s == '-')
			minus = -1;
		s++;
	}
	while (*s && *s >= '0' && *s <= '9')
	{
		i *= 10;
		i += (*s++ - '0');
	}
	return (i * minus);
}