ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: daelee <daelee@student.42seoul.kr>         +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/03/02 13:07:04 by daelee            #+#    #+#             */
/*   Updated: 2021/01/03 10:33:24 by daelee           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char		*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*substr;
	size_t	new_len;

	if (s == NULL)
		return (NULL);
	if ((unsigned int)ft_strlen(s) < start)
		return (ft_strdup(""));
	new_len = ft_strlen(s + start);
	if (new_len < len)
		len = new_len;
	if (!(substr = (char *)malloc(sizeof(char) * (len + 1))))
		return (NULL);
	ft_strlcpy(substr, s + start, len + 1);
	return (substr);
}