ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: oelkhiar <oelkhiar@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/10/20 13:35:30 by oelkhiar          #+#    #+#             */
/*   Updated: 2022/11/20 13:29:06 by oelkhiar         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

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