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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strsub.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/17 08:28:49 by cacharle #+# #+# */
/* Updated: 2020/05/09 12:30:39 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft_str.h"
/*
** \brief Extract a substring from a string
** \param s String to extract from
** \param start Starting index of the substring
** \param len Substring length
** \return The created substring or NULL on error
*/
char *ft_strsub(char const *s, size_t start, size_t len)
{
char *sub;
size_t s_len;
if (s == NULL)
return (NULL);
s_len = ft_strlen(s);
if (start > s_len)
return (NULL);
if (start + len > s_len)
len = s_len - start;
if ((sub = (char*)malloc(sizeof(char) * (len + 1))) == NULL)
return (NULL);
sub[len] = '\0';
if (start > ft_strlen(s))
return (sub);
return (ft_strncpy(sub, s + start, len));
}
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