gnl.c

gnl.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: zmichels <[email protected]>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/02/28 01:08:57 by zmichels          #+#    #+#             */
/*   Updated: 2017/02/28 01:11:12 by zmichels         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

char	*gnl_nconcat(char **as, char *s2, size_t n)
{
	char *s1;

	if (!(s1 = *as))
		return ((*as = ft_strndup(s2, n)));
	;
	if ((*as = malloc(ft_strlen(s1) + ft_strlen(s2) + 1)))
	{
		ft_strcpy(*as, s1);
		ft_strncat(*as, s2, n);
		;
		free(s1);
	}
	return (s1);
}

int		gnl_push_line(char *buf, char **line)
{
	size_t	n;
	char	c;

	if (!gnl_nconcat(line, buf, n = ft_strclen(buf, '\n')))
		return (-1);
	;
	c = buf[n];
	ft_memmove(buf, buf + n + 1, BUFF_SIZE);
	;
	return (c ? 1 : 0);
}

int		get_next_line(const int fd, char **line)
{
	static char buf[256][BUFF_SIZE + 1];
	ssize_t		ret;

	if (!BUFF_SIZE || read(fd, 0, 0) == -1)
		return (-1);
	;
	*line = 0;
	if ((ret = gnl_push_line(buf[fd], line)))
		return (ret);
	;
	while ((ret = read(fd, buf[fd], BUFF_SIZE)) > 0)
		if ((ret = gnl_push_line(buf[fd], line)))
			return (ret);
	;
	return (**line ? 1 : ret);
}