ft_strtrim.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jinpark <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/02/13 19:05:45 by jinpark           #+#    #+#             */
/*   Updated: 2019/02/19 22:21:20 by jinpark          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strtrim(char const *s)
{
	size_t	start;
	size_t	end;
	char	*new;

	if (s == NULL)
		return (NULL);
	start = 0;
	end = ft_strlen(s);
	while (ft_iswhitespace(s[start]))
		start++;
	while (ft_iswhitespace(s[end - 1]))
		end--;
	if (end < start)
		end = start;
	new = ft_strnew(end - start);
	if (new == NULL)
		return (NULL);
	ft_strncpy(new, (s + start), (end - start));
	return (new);
}