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ft_strtrim.c
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ft_strtrim.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strtrim.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mbari <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/24 15:24:38 by mbari #+# #+# */
/* Updated: 2021/06/01 17:45:11 by mbari ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static int trim_start(char const *s1, char const *set)
{
size_t i;
size_t j;
i = 0;
j = 0;
while (set[j] != '\0')
{
if (set[j] == s1[i])
{
while (set[j] == s1[i])
i++;
j = -1;
}
j++;
}
return (i);
}
static int trim_end(char const *s1, char const *set)
{
int s1len;
int j;
j = 0;
s1len = ft_strlen(s1) - 1;
while (set[j])
{
if (set[j] == s1[s1len])
{
while (set[j] == s1[s1len])
s1len--;
j = -1;
}
j++;
}
return (s1len);
}
char *ft_strtrim(char const *s1, char const *set)
{
size_t i;
int start;
int end;
char *s2;
if (s1 == NULL)
return (NULL);
i = 0;
start = trim_start(s1, set);
if (!s1[start])
return (ft_substr(s1, 0, 0));
end = trim_end(s1, set);
i = (end - start) + 1;
s2 = ft_substr(s1, start, i);
return (s2);
}