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ft_strnstr.c
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ft_strnstr.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strnstr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mgiraldo <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/29 20:19:53 by mgiraldo #+# #+# */
/* Updated: 2020/03/05 14:55:11 by mgiraldo ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
char *ft_strnstr(const char *haystack, const char *needle, size_t len)
{
char *bptr;
char *nptr;
unsigned int nlen;
nlen = ft_strlen(needle);
bptr = (char *)haystack + len;
if (!(needle && *needle))
return ((char *)haystack);
while (*haystack)
{
if (!(nptr = ft_strchr(haystack, *(needle + nlen - 1))) || nptr >= bptr)
return (NULL);
haystack = nptr - nlen + 1;
if (*haystack == *needle)
if (!ft_strncmp(haystack, needle, nlen - 1))
return ((char *)haystack);
haystack = nptr + 1;
}
return (NULL);
}