gnl_checker.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   gnl_checker.c                                      :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rjobert <rjobert@student.42barcelo>        +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/07/14 14:14:46 by rjobert           #+#    #+#             */
/*   Updated: 2023/07/18 11:26:02 by rjobert          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "checker.h"

char	*gnl_checker(int fd)
{
	char		*line;
	static char	*text;

	line = NULL;
	if (fd < 0 || read(fd, &line, 0) < 0 || BUFFER_SIZE <= 0)
		return (gnl_free(&text));
	if (!text || (text && !ft_strrchr(text, '\n')))
		add_buffer(fd, &text); 
	if (!text)
		return (NULL);
	line = get_line(text);
	if (!line)
		return (gnl_free(&text));
	text = update_static(text, 0, 0);
	return (line);
}

void	add_buffer(int fd, char **text)
{
	int		byte_read;
	char	buffer[BUFFER_SIZE + 1];

	byte_read = 1;
	buffer[0] = '\0';
	while (byte_read > 0 && !ft_strrchr(buffer, '\n'))
	{
		byte_read = read(fd, buffer, BUFFER_SIZE);
		if (byte_read > 0)
		{
			buffer[byte_read] = '\0';
			*text = gnl_strjoin(*text, buffer);
		}
	}
	if (byte_read < 0)
		gnl_free(text);
}

char	*get_line(char *text)
{
	int		i;
	int		n;
	char	*line;

	measure_n_create(&text, &line, &n);
	if (!line)
		return (NULL);
	i = 0;
	while (i < n)
	{
		line[i] = text[i];
		i++;
	}
	return (line);
}

char	*update_static(char *text, int i, int j)
{
	char	*text_after;

	while (text[i])
		i++;
	while (text[j] && text[j] != '\n')
		j++;
	if (text[j] == '\n')
		j++;
	text_after = malloc((i - j + 1) * sizeof(char));
	if (!text_after)
		return (gnl_free(&text));
	text_after[i - j] = '\0';
	i = 0;
	while (text[j])
	{
		text_after[i] = text[j];
		i++;
		j++;
	}
	gnl_free(&text);
	return (text_after);
}