get_next_line_bonus.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_bonus.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: lgaume <marvin@42lausanne.ch>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/11/01 15:59:37 by lgaume            #+#    #+#             */
/*   Updated: 2023/11/01 15:59:39 by lgaume           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line_bonus.h"

char	*get_next_line(int fd)
{
	char		*line;
	static char	*save[4096];

	if (fd < 0 || BUFFER_SIZE <= 0 || fd >= 4096 || read(fd, 0, 0) < 0)
	{
		free_stash(save);
		*save = NULL;
		return (NULL);
	}
	save[fd] = read_save(fd, save[fd]);
	if (!save[fd])
		return (NULL);
	line = newline(save[fd]);
	save[fd] = clean_save(save[fd]);
	return (line);
}

char	*read_save(int fd, char *save)
{
	char	*buff;
	int 	readed;

	buff = (char *)malloc(sizeof(char) * (BUFFER_SIZE + 1));
	if (!buff)
		return (NULL);
	readed = 1;
	while (!ft_strchr(save, '\n') && readed != 0)
	{
		readed = read(fd, buff, BUFFER_SIZE);
		if (readed == -1)
		{
			free(buff);
			free(save);
			return (NULL);
		}
		buff[readed] = '\0';
		save = ft_strjoin(save, buff);
	}
	free(buff);
	return (save);
}

char 	*newline(char *save)
{
	int		i;
	char	*str;

	i = 0;
	if (!save[i])
		return (NULL);
	while (save[i] && save[i] != '\n')
		i++;
	str = (char *)malloc(sizeof(char) * (i + 2));
	if (!str)
		return (NULL);
	i = 0;
	while (save[i] && save[i] != '\n')
	{
		str[i] = save[i];
		i++;
	}
	if (save[i] == '\n')
	{
		str[i] = save[i];
		i++;
	}
	str[i] = '\0';
	return (str);
}

char 	*clean_save(char *save)
{
	int		i;
	int 	j;
	char 	*s;

	i = 0;
	while (save[i] && save[i] != '\n')
		i++;
	if (!save[i])
	{
		free(save);
		return (NULL);
	}
	s = (char *)malloc(sizeof(char) * (ft_strlen(save) - 1 + 1));
	if (!s)
		return (NULL);
	i++;
	j = 0;
	while (save[i])
		s[j++] = save[i++];
	s[j] = '\0';
	free(save);
	return (s);
}