ft_split.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_split.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kbenjel <[email protected]>         +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/09/07 02:58:22 by kbenjel           #+#    #+#             */
/*   Updated: 2023/09/08 03:59:10 by kbenjel          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include <stdlib.h>

char	**free_previous(char **splits)
{
	int	i;

	i = -1;
	while (splits[++i])
		free(splits[i]);
	free(splits);
	return (NULL);
}

int	is_separator(char c, char *charset)
{
	int	i;

	i = 0;
	if (!charset)
		return (0);
	while (charset[i])
	{
		if (charset[i] == c)
			return (1);
		i++;
	}
	return (0);
}

int	substring_count(char *str, char *charset)
{
	int	count;
	int	i;

	count = 0;
	i = -1;
	if (!str || !charset)
		return (0);
	while (str[++i])
	{
		if (!is_separator(str[i], charset))
		{
			count++;
			while (str[i] && !is_separator(str[i], charset))
				i++;
		}
	}
	return (count);
}

char	**fill_splits(char **splits, char *str, char *charset)
{
	int	i[3];

	i[0] = -1;
	i[1] = 0;
	i[2] = 0;
	while (str[++i[0]])
	{
		if (!is_separator(str[i[0]], charset))
		{
			i[2] = 0;
			while (str[i[0]] && !is_separator(str[i[0]], charset))
			{
				splits[i[1]][i[2]] = str[i[0]];
				i[0]++;
				i[2]++;
			}
			splits[i[1]][i[2]] = '\0';
			i[1]++;
		}
	}
	splits[i[1]] = NULL;
	return (splits);
}

char	**ft_split(char *str, char *charset)
{
	char	**splits;
	int		i[3];

	i[1] = -1;
	i[2] = -1;
	splits = malloc((substring_count(str, charset) + 1) * sizeof(char *));
	if (!str || !splits)
		return (NULL);
	while (str[++i[1]])
	{
		i[0] = 0;
		if (!is_separator(str[i[1]], charset))
		{
			i[2]++;
			while (str[i[1]] && !is_separator(str[i[1]], charset))
			{
				i[0]++;
				i[1]++;
			}
			splits[i[2]] = malloc(i[0] + 1);
			if (!splits[i[2]])
				return (free_previous(splits));
		}
	}
	return (fill_splits(splits, str, charset));
}