libft/ft_split.c at main · rubenoid/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   ft_split.c                                         :+:    :+:            */
/*                                                     +:+                    */
/*   By: rvan-sch <[email protected]>         +#+                     */
/*                                                   +#+                      */
/*   Created: 2019/11/22 20:56:03 by rvan-sch      #+#    #+#                 */
/*   Updated: 2019/11/22 21:04:24 by rvan-sch      ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static size_t		ft_split_length(const char *s, char c)
{
	size_t	i;

	i = 0;
	while (s[i] && s[i] != c)
	{
		i++;
	}
	return (i);
}

static const char	*ft_next_split(char const *s, char c)
{
	while (*s && *s == c)
		s++;
	return (s);
}

static size_t		ft_count_splits(char const *s, char c)
{
	size_t n;

	n = 0;
	s = ft_next_split(s, c);
	while (*s)
	{
		s = s + ft_split_length(s, c);
		s = ft_next_split(s, c);
		n++;
	}
	return (n);
}

static void			ft_clean(char **split)
{
	size_t	i;

	i = 0;
	while (split[i])
	{
		free(split[i]);
		i++;
	}
	free(split);
}

char				**ft_split(const char *s, char c)
{
	char	**table;
	size_t	i;
	size_t	split_amount;

	if (!s)
		return (NULL);
	split_amount = ft_count_splits(s, c);
	table = (char **)malloc((split_amount + 1) * sizeof(char *));
	if (table == NULL)
		return (NULL);
	i = 0;
	while (i < split_amount)
	{
		s = ft_next_split(s, c);
		table[i] = ft_substr(s, 0, ft_split_length(s, c));
		if (table[i] == NULL)
		{
			ft_clean(table);
			return (NULL);
		}
		i++;
		s = s + ft_split_length(s, c);
	}
	table[split_amount] = NULL;
	return (table);
}