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ft_substr.c
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ft_substr.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_substr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: wleite <wleite@student.42sp.org.br> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/07/27 19:25:30 by wleite #+# #+# */
/* Updated: 2021/08/04 05:23:38 by wleite ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static size_t strnlen(const char *s, size_t n)
{
size_t i;
i = 0;
while (s[i] && i < n)
i++;
return (i);
}
char *ft_substr(char const *s, unsigned int start, size_t len)
{
char *str;
size_t srclen;
if (!s)
return (NULL);
srclen = ft_strlen(s);
if (srclen > start)
len = strnlen(&s[start], len);
else
return (ft_strdup(""));
str = (char *)malloc(sizeof(char) * len + 1);
if (!str)
return (NULL);
ft_strlcpy(str, &s[start], len + 1);
return (str);
}