ft_substr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: lignigno <lignign@student.21-school.ru>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/10/15 14:02:34 by lumfred           #+#    #+#             */
/*   Updated: 2021/10/20 13:23:45 by lumfred          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include "libft.h"

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

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