42_INT_02_gnl/get_next_line.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: hulamy <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/12/21 00:28:33 by hulamy            #+#    #+#             */
/*   Updated: 2019/12/21 00:28:39 by hulamy           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

	//-g -fsanitize=address
	//:set noendofline binary
	//https://github.com/charMstr/GNL_lover
	//https://github.com/mrjvs/42cursus_gnl_tests
	//https://github.com/Sherchryst/gnlkiller
	//https://github.com/Hellio404/Get_Next_Line_Tester
	//https://github.com/TinfoilPancakes/get-next-line-testing-tools

	#include <stdio.h>	//for printf
	#include <fcntl.h>	//for open

	void	ft_putchar(char c){
		write(1, &c, 1);
	}

	void	ft_putstr(char *s)
	{
		while (s && *s)
			ft_putchar(*s++);
	}

	void	ft_putnbr(int n)
	{
		long	l;

		l = n;
		if (l < 0)
		{
			ft_putchar('-');
			l *= -1;
		}
		if (l >= 10)
			ft_putnbr(l / 10);
		ft_putchar((l % 10) + '0');
	}

	int		main(int ac, char **av)
	{
		int		*fd;
		int		i;
		int		j;
		int		ret;
		char	*line;

	//	if (ac < 2)
	//		return (0);

	//	(void)i;(void)j;
	//	line = NULL;
	//	fd[0] = open(av[1], O_RDONLY);
	//	ret = 1;
	//	while (ret)
	//	{
	//		ret = get_next_line(fd[0], &line);
	//		printf("[%i] %s\n", ret, line);
	//	}

		line = NULL;
		i = 0;
		if (!(fd = (int *)malloc(sizeof(int) * ac)))
			return (0);
		while (++i <= ac - 1)
			fd[i - 1] = open(av[i], O_RDONLY);
		i = 0;
		j = 0;
		while (j < ac - 1)
		{
			if ((ret = get_next_line(fd[i], &line)) > 0)
			{
				//printf("[fd%i-%i] %s\n", fd[i], ret, line);
				ft_putstr("[fd");ft_putnbr(fd[i]);ft_putchar('-');ft_putnbr(ret);ft_putstr("]\n");
				free(line);
				j = 0;
			}
			else
			{
				free(line);
				//printf("[fd%i-%i]*FINI*\n", fd[i], ret);
				ft_putstr("[fd");ft_putnbr(fd[i]);ft_putchar('-');ft_putnbr(ret);ft_putstr("]*FINI*\n");
				j++;
			}
			i++;
			if (i >= ac - 1)
				i = 0;
		}
		free(fd);
		//while (1);
		return (0);
	}


int		free_lst(t_gnlist **lst, int ret)
{
	t_gnlist	*tmp;
	int			debug;

	tmp = *lst;
	debug = tmp->lfd;

//	char		*s;
//	s = tmp->string;
//	if (ret == -1)
//		while (lst->lfd != fd)
//		{
//			free((*lst)->string);
//			*lst = (*lst)->next;
//			free(tmp);
//			tmp = *lst;
//		}
//	tmp->string = tmp->next->string;
//	free(s);

//	write(1, "\nIII\n", 5);
	while ((*lst)->next != tmp)
		(*lst) = (*lst)->next;
	(*lst)->next = (*lst)->next->next;
	free(tmp->str);
	free(tmp);

	tmp = (*lst)->next;
	ft_putstr("\nDEL ");debug>9 ? ft_putstr("  "):ft_putstr(" ");ft_putchar('-');
	while (tmp != *lst)
	{
		ft_putnbr(tmp->lfd); ft_putchar('-'); tmp = tmp->next;
	}
	ft_putnbr(tmp->lfd); ft_putchar('-'); tmp = tmp->next;
	ft_putchar('('); ft_putnbr(tmp->lfd); ft_putstr(")");

	return (ret);
}

int		multi_fd(int fd, t_gnlist **lst)
{
	t_gnlist	*tmp;

	tmp = *lst;
	while (*lst && (*lst)->lfd != fd && (*lst)->next != tmp)
		*lst = (*lst)->next;
	if (!tmp || ((*lst)->next == tmp && (*lst)->lfd != fd))
	{
		if (!(tmp = (t_gnlist*)malloc(sizeof(*tmp))))
			return (0);
		tmp->lfd = fd;
		if (!(tmp->str = ft_strdup("")))
			return (0);
		if (*lst)
		{
			tmp->next = (*lst)->next;
			(*lst)->next = tmp;
		}
		else
			tmp->next = tmp;
		*lst = tmp;
	}

	tmp = *lst;
	ft_putstr("LST ");ft_putnbr(tmp->lfd); ft_putchar('-'); tmp = tmp->next;
	while (tmp != *lst)
	{
		ft_putnbr(tmp->lfd); ft_putchar('-'); tmp = tmp->next;
	}
	ft_putchar('('); ft_putnbr(tmp->lfd); ft_putstr(")");

	return (1);
}

int		get_next_line(const int fd, char **line)
{
	char				buf[BUFFER_SIZE + 1];
	int					ret;
	static t_gnlist		*lst = NULL;
	char				*str;

	ret = 1;
	if (!(multi_fd(fd, &lst)) || !line || BUFFER_SIZE < 1)
		return (free_lst(&lst, -1));
	while (!(str = ft_strchr(lst->str, '\n')) && ret != 0)
	{
		if ((ret = read(fd, buf, BUFFER_SIZE)) < 0)
			return (free_lst(&lst, -1));
		buf[ret] = '\0';
		if (!(lst->str = ft_strjoinfree(lst->str, buf)))
			return (free_lst(&lst, -1));
	}
	if (str != NULL)
		str[0] = '\0';
	if (!(*line = ft_strdup(lst->str)))
		return (free_lst(&lst, -1));
	if (str != NULL)
		return(ft_memmove(lst->str, str + 1, ft_strlen(str + 1) + 1) != NULL);
//	return (0);
	return (free_lst(&lst, 0));
}