Get_Next_Line/get_next_line.c at main · ItsVaguayo/Get_Next_Line · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: vaguayo- <vaguayo-@student.42barcelona.    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/11/11 12:32:09 by vaguayo-          #+#    #+#             */
/*   Updated: 2025/11/24 11:54:12 by vaguayo-         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

char	*init_storage(char **storage)
{
	char	*buffer;

	if (!*storage)
		*storage = ft_calloc(1, 1);
	buffer = ft_calloc(BUFFER_SIZE + 1, sizeof(char));
	return (buffer);
}

char	*line_reader(char **storage, int fd, char *temp)
{
	char	*buffer;
	ssize_t	bytes;

	buffer = init_storage(storage);
	if (!buffer)
		return (NULL);
	bytes = 1;
	while (!ft_strchr(*storage, '\n'))
	{
		bytes = read(fd, buffer, BUFFER_SIZE);
		if (bytes <= 0)
			break ;
		buffer [bytes] = '\0';
		temp = *storage;
		*storage = ft_strjoin(temp, buffer);
		free(temp);
		if (!*storage)
			return (free(buffer), NULL);
	}
	if (bytes < 0)
		return (free(*storage), *storage = NULL, free(buffer), NULL);
	free(buffer);
	if (**storage == '\0')
		return (free(*storage), *storage = NULL, NULL);
	return (*storage);
}

char	*clean_line(char **storage, size_t i)
{
	char	*line;
	char	*tempstorage;

	line = ft_substr(*storage, 0, i + 1);
	tempstorage = ft_substr(*storage, i + 1, ft_strlen(*storage) - (i + 1));
	free(*storage);
	*storage = NULL;
	if (!line || !tempstorage)
	{
		free(line);
		free(tempstorage);
		return (NULL);
	}
	*storage = tempstorage;
	return (line);
}

char	*line_separator(char **storage)
{
	char	*line;
	size_t	i;

	if (!*storage)
		return (NULL);
	i = 0;
	while ((*storage)[i] && (*storage)[i] != '\n')
		i++;
	if ((*storage)[i] == '\n')
		line = clean_line(storage, i);
	else
	{
		line = ft_substr(*storage, 0, ft_strlen(*storage));
		free(*storage);
		*storage = NULL;
	}
	if (!line)
		return (NULL);
	return (line);
}

char	*get_next_line(int fd)
{
	static char	*storage;
	char		*line;
	char		*temp;

	temp = NULL;
	if (fd < 0 || BUFFER_SIZE <= 0)
		return (NULL);
	if (line_reader(&storage, fd, temp) == NULL)
		return (NULL);
	line = line_separator(&storage);
	if (!line)
		return (NULL);
	return (line);
}