ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: abellakr <abellakr@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/10 22:50:55 by abellakr          #+#    #+#             */
/*   Updated: 2021/12/09 00:28:47 by abellakr         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!s)
		return (NULL);
	if (len > ft_strlen(s))
		len = ft_strlen(s);
	if ((size_t)start > ft_strlen(s))
		return (ft_strdup(""));
	str = (char *)malloc((len + 1) * sizeof(char));
	if (str)
	{
		str_index = 0;
		while (len-- && ((char *)s)[start])
		{
			str[str_index] = ((char *)s)[start];
			str_index++;
			start++;
		}
		str[str_index] = 0;
		return (str);
	}
	return (NULL);
}