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ft_strnstr.c
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ft_strnstr.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strnstr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: asibille <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/01/04 17:48:13 by asibille #+# #+# */
/* Updated: 2022/01/12 17:45:03 by asibille ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
char *ft_strnstr(const char *haystack, const char *needle, size_t len)
{
const char *ptr1;
const char *ptr2;
size_t len_copy;
int out;
if (ft_strlen(needle) == 0)
return ((char *) haystack);
while (*haystack && (--len + 1) > 0)
{
out = 0;
ptr1 = needle;
ptr2 = haystack;
len_copy = len + 2;
while (*ptr1 && *ptr2 && --len_copy > 0)
{
if (*ptr1 != *ptr2)
out = 1;
++ptr1;
++ptr2;
}
if (!out && len_copy >= 0 && *ptr1 == '\0')
return ((char *) haystack);
++haystack;
}
return (0);
}