libft/ft_atoi.c at main · jos-felipe/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: josfelip <josfelip@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/07/30 13:41:18 by josfelip          #+#    #+#             */
/*   Updated: 2023/08/07 13:49:54 by josfelip         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	sign = 1;
	nb = 0;
	while (*nptr == '\t' || *nptr == '\n' || *nptr == '\v' || \
			*nptr == '\f' || *nptr == '\r' || *nptr == ' ')
		nptr++;
	if (*nptr == '-' || *nptr == '+')
	{
		if (*nptr == '-')
			sign = -1;
		nptr++;
	}
	while (ft_isdigit(*nptr))
	{
		nb = (*nptr - '0') + (nb * 10);
		nptr++;
	}
	return (nb * sign);
}