/*
Libft Copyright (C) 2026 yctct

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

#include "libft.h"

char	*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*ptr;
	size_t	s_len;
	size_t	ptr_len;

	if (!s)
		return (NULL);
	s_len = ft_strlen(s);
	if (s_len <= start)
		return (ft_strdup(""));
	else if (s_len > start + len)
		ptr_len = len;
	else
		ptr_len = s_len - start;
	ptr = malloc(ptr_len + 1);
	ft_strlcpy(ptr, &s[start], ptr_len + 1);
	return (ptr);
}

/*
#include <stdio.h>

int	main(void)
{
	char	s[] = "lorem ipsum dolor sit amet";
	char	*ptr;

	ptr = ft_substr(s, 6, 6);
	printf("%s\n", ptr);
	free(ptr);
	printf("%s\n", ft_substr("", 0, 1));
	printf("%s\n", ft_substr(s, 15, 1));
	printf("%s\n", ft_substr(s, 0, 10));
	printf("%s\n", ft_substr(s, 7, 10));
	printf("%s\n", ft_substr(s, 7, 0));
	printf("%s\n", ft_substr(s, 0, 0));
	printf("%s\n", ft_substr(s, 400, 20));
}
*/