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ft_strstr.c
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ft_strstr.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strstr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dalves-p <dalves-p@student.42sp.org.br> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/04/08 22:32:06 by dalves-p #+# #+# */
/* Updated: 2021/06/29 18:17:26 by dalves-p ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
/*
** LIBRARY: <strings.h>
** DESCRIPTION:
** The strstr() function finds the first occurrence of the substring needle
** in the string haystack. The terminating null bytes ('\0') are not compared.
** It returns a pointer to the beginning of the located substring, or NULL
** if the substring is not found.
*/
char *ft_strstr(char *haystack, char *needle)
{
int i;
int j;
i = 0;
if (needle[0] == '\0')
return (haystack);
while (haystack[i] != '\0')
{
j = 0;
while (haystack[i + j] == needle[j] && haystack[i + j] != '\0')
{
if (needle[j + 1] == '\0')
return (&haystack[i]);
j++;
}
i++;
}
return (0);
}