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ft_strnstr.c
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ft_strnstr.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strnstr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: kichlee <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/11/26 16:14:36 by kichlee #+# #+# */
/* Updated: 2022/12/16 23:13:09 by kichlee ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
size_t ft_strlen_a(const char *ch)
{
size_t i;
i = 0;
while (ch[i])
++i;
return (i);
}
char *ft_strnstr(const char *s1, const char *s2, size_t l)
{
size_t i;
size_t j;
size_t len;
i = 0;
j = 0;
len = ft_strlen_a(s2);
if (!*s2)
return ((char *)s1);
while (s1[i] && i < l)
{
if (s1[i] == s2[j])
j++;
else if (s1[i] != s2[j])
{
i -= j;
j = 0;
}
++i;
if (len == j)
return ((char *)&s1[i - len]);
}
return (0);
}