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ft_strtrim.c
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ft_strtrim.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strtrim.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: nwatanab <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/11/02 20:42:07 by nwatanab #+# #+# */
/* Updated: 2020/11/23 15:34:53 by nwatanab ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int is_setchar(char const c, char const *set)
{
int i;
i = 0;
while (set[i])
{
if (set[i] == c)
return (1);
i++;
}
return (0);
}
char *ft_strtrim(char const *s1, char const *set)
{
int i;
size_t start;
size_t end;
char *p;
if (!s1)
return (NULL);
if (!set)
return ((char *)s1);
start = 0;
end = ft_strlen(s1);
i = 0;
while (is_setchar(s1[start], set))
start++;
while (is_setchar(s1[end - 1], set) && start < end)
end--;
p = malloc(sizeof(char) * (end - start + 1));
if (p == NULL)
return (NULL);
ft_strlcpy(p, s1 + start, end - start + 1);
return (p);
}