/*
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_strnstr(const char *big, const char *little, size_t len)
{
	unsigned long	i;
	int				j;

	if (ft_strlen(little) <= 0)
		return ((char *)(big));
	i = 0;
	while (big[i] != '\0' && i < len)
	{
		if (big[i] == little[0])
		{
			j = 0;
			while (big[i + j] == little[j] && little[j] && (i + j) < len)
				j++;
			if (little[j] == '\0')
				return ((char *)(&big[i]));
		}
		i++;
	}
	return (NULL);
}
/*
#include <bsd/string.h>
#include <stdio.h>
#include <string.h>

int	main(void)
{
		const char *largestring = "Foo Bar Caz";
		const char *smallstring = "Bar";
		const char *empty_smallstring = "";
		const char *largestring2 = "Foo Baz Caz";
		const char *smallstring2 = "Bar";
		const char *largestring3 = "Foo Bar Baz";
		const char *smallstring3 = "Baz";

	printf("  the big string is: %s\n", largestring);
	printf("the small string is: %s\n", smallstring);
		printf("            strnstr: %s\n",
strnstr(largestring, smallstring, 7));
		printf("         ft_strnstr: %s\n",
ft_strnstr(largestring, smallstring, 7));
	printf("----------------------------------
---------------------------------\n");
	printf("When the small string is empty,
 the function returns the big string\n");
	printf("  the big string is: %s\n", largestring);
	printf("the small string is: %s\n", empty_smallstring);
		printf("            strnstr: %s\n",
strnstr(largestring, empty_smallstring, 7));
		printf("         ft_strnstr: %s\n",
ft_strnstr(largestring, empty_smallstring, 7));
	printf("------------------------------
-------------------------------------\n");
	printf("When the little string occurs
nowhere in big, NULL is returned\n");
	printf("  the big string is: %s\n", largestring2);
	printf("the small string is: %s\n", smallstring2);
		printf("            strnstr: %s\n",
strnstr(largestring2, smallstring2, 7));
		printf("         ft_strnstr: %s\n",
ft_strnstr(largestring2, smallstring2, 7));
	printf("-------------------------------
------------------------------------\n");
	printf("When the little string occurs
at the end of big\n");
	printf("  the big string is: %s\n", largestring3);
	printf("the small string is: %s\n", smallstring3);
		printf("            strnstr: %s\n",
strnstr(largestring3, smallstring3, 11));
		printf("         ft_strnstr: %s\n",
ft_strnstr(largestring3, smallstring3, 11));
	printf("-----------------------------------
--------------------------------\n");
	printf("When length is smaller than
necessary to print little\n");
	printf("  the big string is: %s\n", largestring3);
	printf("the small string is: %s\n", smallstring3);
		printf("            strnstr: %s\n",
strnstr(largestring3, smallstring3, 10));
		printf("         ft_strnstr: %s\n",
ft_strnstr(largestring3, smallstring3, 10));
	printf("----------------------------
---------------------------------------\n");
	printf("When length is zero\n");
	printf("  the big string is: %s\n", largestring3);
	printf("the small string is: %s\n", smallstring3);
		printf("            strnstr: %s\n",
strnstr(largestring3, smallstring3, 0));
		printf("         ft_strnstr: %s\n",
ft_strnstr(largestring3, smallstring3, 0));
}
*/