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ft_split.c
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ft_split.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_split.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: ncolomer <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/07 15:38:59 by ncolomer #+# #+# */
/* Updated: 2019/10/11 18:07:44 by ncolomer ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static char
**ft_alloc_split(char const *s, char c)
{
size_t i;
char **split;
size_t total;
i = 0;
total = 0;
while (s[i])
{
if (s[i] == c)
total++;
i++;
}
split = (char**)malloc(sizeof(s) * (total + 2));
if (!split)
return (NULL);
return (split);
}
void
*ft_free_all_split_alloc(char **split, size_t elts)
{
size_t i;
i = 0;
while (i < elts)
{
free(split[i]);
i++;
}
free(split);
return (NULL);
}
static void
*ft_split_range(char **split, char const *s,
t_split_next *st, t_split_next *lt)
{
split[lt->length] = ft_substr(s, st->start, st->length);
if (!split[lt->length])
return (ft_free_all_split_alloc(split, lt->length));
lt->length++;
return (split);
}
static void
*ft_split_by_char(char **split, char const *s, char c)
{
size_t i;
t_split_next st;
t_split_next lt;
i = 0;
lt.length = 0;
lt.start = 0;
while (s[i])
{
if (s[i] == c)
{
st.start = lt.start;
st.length = (i - lt.start);
if (i > lt.start && !ft_split_range(split, s, &st, <))
return (NULL);
lt.start = i + 1;
}
i++;
}
st.start = lt.start;
st.length = (i - lt.start);
if (i > lt.start && i > 0 && !ft_split_range(split, s, &st, <))
return (NULL);
split[lt.length] = 0;
return (split);
}
char
**ft_split(char const *s, char c)
{
char **split;
if (!(split = ft_alloc_split(s, c)))
return (NULL);
if (!ft_split_by_char(split, s, c))
return (NULL);
return (split);
}