ft_split.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_split.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: doley <doley@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/09 18:44:35 by doley             #+#    #+#             */
/*   Updated: 2024/10/11 22:34:21 by doley            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	ft_count_words(const char *str, char c)
{
	int		count;
	int		in_word;

	count = 0;
	in_word = 0;
	while (*str)
	{
		if (*str != c && !in_word)
		{
			in_word = 1;
			count++;
		}
		else if (*str == c)
			in_word = 0;
		str++;
	}
	return (count);
}

static void	ft_free_tab(char **tab, int i)
{
	while (i >= 0)
	{
		free(tab[i]);
		i--;
	}
	free(tab);
}

static int	ft_fill_tab(char **tab, const char *s, char c)
{
	int		i;
	size_t	len;

	i = 0;
	while (*s)
	{
		while (*s == c)
			s++;
		if (*s)
		{
			if (!ft_strchr(s, c))
				len = ft_strlen(s);
			else
				len = ft_strchr(s, c) - s;
			tab[i++] = ft_substr(s, 0, len);
			if (!tab[i - 1])
			{
				ft_free_tab(tab, i - 2);
				return (-1);
			}
			s += len;
		}
	}
	tab[i] = NULL;
	return (0);
}

char	**ft_split(char const *s, char c)
{
	char	**tab;

	if (!s)
		return (NULL);
	tab = malloc(sizeof(char *) * (ft_count_words(s, c) + 1));
	if (!tab)
		return (NULL);
	if (ft_fill_tab(tab, s, c) == -1)
		return (NULL);
	return (tab);
}