get_next_line_bonus.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_bonus.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dsoroko <dsoroko@student.s19.be>           +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/05/23 11:21:36 by dsoroko           #+#    #+#             */
/*   Updated: 2022/05/25 11:10:35 by dsoroko          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line_bonus.h"

char	*make_new_line(char *str)
{
	int		i;
	char	*line;

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

char	*clean_the_rest(char *str)
{
	int		i;
	int		j;
	char	*new_str;

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

char	*read_and_stash(int fd, char *str)
{
	int		char_count;
	char	*temp;

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

char	*get_next_line(int fd)
{
	char		*line;
	static char	*stash[OPEN_MAX];

	if (fd < 0 || BUFFER_SIZE <= 0 || fd > OPEN_MAX)
		return (NULL);
	stash[fd] = read_and_stash(fd, stash[fd]);
	if (!stash[fd])
		return (NULL);
	line = make_new_line(stash[fd]);
	stash[fd] = clean_the_rest(stash[fd]);
	return (line);
}