ft_split.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_split.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sel-mlil <sel-mlil@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/26 20:35:11 by sel-mlil          #+#    #+#             */
/*   Updated: 2024/10/28 03:13:02 by sel-mlil         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	word_count(char *s, char sep)
{
	int	i;
	int	in_word;
	int	cp;

	i = 0;
	in_word = 0;
	cp = 0;
	while (s[i])
	{
		if (s[i] == sep)
		{
			in_word = 0;
		}
		else if (s[i] != sep && in_word == 0)
		{
			in_word = 1;
			cp++;
		}
		i++;
	}
	return (cp);
}

static void	*free_arr(char **arr, int i)
{
	while (--i >= 0)
		free(arr[i]);
	free(arr);
	return (NULL);
}

static char	**filling_arr(char c, const char *s, char **arr, int words)
{
	int	i;
	int	start;
	int	end;

	i = 0;
	start = 0;
	while (i < words)
	{
		while (s[start] && s[start] == c)
			start++;
		end = start;
		while (s[end] && s[end] != c)
			end++;
		arr[i] = ft_substr(s, (unsigned int)start, (size_t)(end - start));
		if (!arr[i])
			return (free_arr(arr, i));
		start = end + 1;
		i++;
	}
	arr[i] = NULL;
	return (arr);
}

char	**ft_split(char const *s, char c)
{
	int		words;
	char	**splitted;

	if (!s)
		return (NULL);
	if (!*s)
	{
		splitted = (char **)malloc(sizeof(char *));
		if (!splitted)
			return (NULL);
		splitted[0] = NULL;
		return (splitted);
	}
	words = word_count((char *)s, c);
	splitted = (char **)malloc((words + 1) * sizeof(char *));
	if (!splitted)
		return (NULL);
	return (filling_arr(c, s, splitted, words));
}