ft_strtrim.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: abassibe <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/01/24 16:33:55 by abassibe          #+#    #+#             */
/*   Updated: 2018/03/14 01:45:26 by abassibe         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	ft_isblank(int c)
{
	if (c == ' ' || c == '\n' || c == '\t')
		return (1);
	return (0);
}

char		*ft_strtrim(const char *str)
{
	int	i;
	int	j;
	int	k;

	if (!str)
		return (NULL);
	i = 0;
	while (ft_isblank(str[i]) == 1)
		i++;
	j = 0;
	k = 0;
	while (str[k] != '\0')
	{
		if (ft_isblank(str[k]) == 0)
		{
			k++;
			j = k;
		}
		else
			k++;
	}
	if (j == 0)
		return (ft_strdup(""));
	return (ft_strsub(str, i, j - i));
}