/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: hulamy <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/11/25 14:01:58 by hulamy            #+#    #+#             */
/*   Updated: 2019/11/27 19:54:09 by hulamy           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

/*
** create a copy of a portion of s, begining at start and of length len
*/

/*
**	#include <libc.h>
**
**	char	*ft_substr(char const *s, unsigned int start, size_t len);
**
**	int		main(int ac, char **av)
**	{
**		char	*str;
**
**		if (ac != 4)
**			return (0);
**		str = ft_substr(av[1], atoi(av[2]), atoi(av[3]));
**		printf("%s\n",str);
**		return (0);
**	}
*/

#include "libft.h"

char	*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*str;
	size_t	i;

	if (!s)
		return (NULL);
	if (ft_strlen(s) < start)
		return ("");
	if (!(str = (char *)malloc(sizeof(char) * (len + 1))))
		return (NULL);
	i = 0;
	while (i < len && s[start])
		str[i++] = s[start++];
	str[i] = '\0';
	return (str);
}