/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jmaiquez <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2016/01/07 15:42:58 by jmaiquez          #+#    #+#             */
/*   Updated: 2016/01/11 18:12:56 by jmaiquez         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

static char     *gnl_join(char *dst, char *src)
{
    char    *tmp;

    tmp = dst;
    dst = ft_strjoin(tmp, src);
    free(tmp);
    return (dst);
}

static int      gnl_read(int const fd, char *save[fd])
{
    int     ret;
    char    buf[BUFF_SIZE + 1];

    while (!(ft_strchr(save[fd], '\n')) && (ret = read(fd, buf, BUFF_SIZE)) > 0)
    {
        buf[ret] = '\0';
        save[fd] = gnl_join(save[fd], buf);
    }
    return (ret);
}

static int      gnl_copy(int const fd, char *save[fd], char **line)
{
    int     i;
    char    *tmp;

    i = 0;
    while (save[fd][i] != '\n' && save[fd][i] != '\0')
        i++;
    *line = ft_strsub(save[fd], 0, i);
    tmp = (char *)malloc(sizeof(*tmp) * (ft_strlen(save[fd]) + 1));
    if (tmp == NULL)
        return (-1);
    ft_strcpy(tmp, &save[fd][i + 1]);
    ft_strclr(save[fd]);
    ft_strcpy(save[fd], tmp);
    return (1);
}

int             get_next_line(int const fd, char **line)
{
    static  char    *save[255];

    if (fd < 0 || line == NULL || fd > 255)
        return (-1);
    if (save[fd] == NULL)
        save[fd] = ft_memalloc(1);
    if (gnl_read(fd, &(*save)) < 0)
        return (-1);
    if (save[fd][0] == '\0')
    {
        *line = NULL;
        return (0);
    }
    if (gnl_copy(fd, &(*save), line) < 0)
        return (-1);
    return (1);
}