/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_split.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/17 16:09:01 by kcolin            #+#    #+#             */
/*   Updated: 2024/10/17 16:50:01 by kcolin           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"
#include <stdlib.h>

static size_t	count_segments(char const *s, char c)
{
	size_t	i;
	int		count;

	i = 0;
	count = 0;
	while (s[i] != '\0')
	{
		if (s[i] != c && (s[i + 1] == c || s[i + 1] == '\0'))
			count++;
		i++;
	}
	return (count);
}

static char	*ft_strnchr(const char *s, int c)
{
	int	i;

	i = 0;
	while (s[i] != '\0')
	{
		if (s[i] != c)
			return ((char *)s + i);
		i++;
	}
	return (0);
}

static void	free_buf(char **buf, size_t length)
{
	size_t	i;

	i = 0;
	while (i < length)
	{
		free(buf[i]);
		i++;
	}
	free(buf);
}

char	**ft_split(char const *s, char c)
{
	char	**out;
	size_t	s_idx;
	size_t	out_idx;
	size_t	length;

	out = ft_calloc(count_segments(s, c) + 1, sizeof(char *));
	if (out == NULL)
		return (NULL);
	s_idx = 0;
	out_idx = 0;
	while (out_idx < count_segments(s, c))
	{
		s_idx = ft_strnchr(s + s_idx, c) - s;
		length = ft_strchr(s + s_idx, c) - s - s_idx;
		out[out_idx] = ft_substr(s, s_idx, length);
		if (out[out_idx] == NULL)
		{
			free_buf(out, out_idx);
			return (NULL);
		}
		s_idx += length;
		out_idx++;
	}
	return (out);
}

/*
#include <stdio.h> // TODO: BAD

int	main(int argc, char **argv)
{
	if (argc == 3)
	{
		int	count = count_segments(argv[1], argv[2][0]);
		printf("segments: %d\n", count);
		char	**buf = ft_split(argv[1], argv[2][0]);
		size_t	i = 0;
		while (buf[i] != NULL)
		{
			printf("%zu\t'%s'\n", i, buf[i]);
			i++;
		}
		free_buf(buf, i);
		return (0);
	}
	else
	{
		printf("Usage: %s <string> <separator>\n", argv[0]);
		return (1);
	}
}
*/