ft_strtrim.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kamako <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/06/15 13:05:54 by kamako            #+#    #+#             */
/*   Updated: 2019/06/19 13:49:36 by kamako           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	i = 0;
	k = 0;
	if (!s)
		return (NULL);
	while (s[i] == ' ' || s[i] == '\n' || s[i] == '\t')
		i++;
	if (s[i] == '\0')
		return (ft_strcpy(ft_memalloc(sizeof(char) * 2), ""));
	j = ft_strlen(s) - 1;
	while (s[j] == ' ' || s[j] == '\n' || s[j] == '\t')
		j--;
	if ((str = (char *)malloc(sizeof(char) * (j - i + 2))) == NULL)
		return (NULL);
	while (k < j - i + 1)
	{
		str[k] = s[i + k];
		k++;
	}
	str[k] = '\0';
	return (str);
}