ft_isalpha.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_isalpha.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: abaudot <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/01/05 15:12:38 by abaudot           #+#    #+#             */
/*   Updated: 2021/01/06 18:33:39 by abaudot          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

/*
** 32 == 0b100000
** a == 0b1100001
** 96 = 0b1100000
** 96 - a = 100000000...
** 26 =   0b11010
*/

int	ft_isalpha(int c)
{
	return (((unsigned)c | 32) - 'a' < 26);
}