Libft/ft_substr.c at main · devPaidion/Libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kjungoo <kjungoo@student.42seoul.kr>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/07/15 17:09:20 by kjungoo           #+#    #+#             */
/*   Updated: 2022/07/29 17:17:54 by kjungoo          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

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