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get_next_line_bonus.c
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get_next_line_bonus.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line_bonus.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: tlakchai <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/24 09:56:34 by codespace #+# #+# */
/* Updated: 2023/11/27 22:38:32 by tlakchai ### ########.fr */
/* */
/* ************************************************************************** */
#include "get_next_line_bonus.h"
char get_content(t_gnl *gnl, t_list *tmp, int rd_size, size_t idx)
{
while (tmp)
{
if (!tmp->buffer[tmp->idx])
{
rd_size = read(gnl->fd, tmp->buffer, BUFFER_SIZE);
if (rd_size < 1)
return (rd_size == 0);
tmp->buffer[rd_size] = '\0';
tmp->idx = 0;
}
idx = tmp->idx;
while (tmp->buffer[idx] && tmp->buffer[idx] != '\n')
idx++;
gnl->is_nl = tmp->buffer[idx] == '\n';
gnl->line_len += idx - tmp->idx + gnl->is_nl;
if (gnl->is_nl)
return (1);
if (!gnl_lstnew(&(tmp->next)))
return (0);
tmp = tmp->next;
}
return (1);
}
char *get_lines(t_gnl *gnl, size_t len, char **line)
{
t_list *tmp;
char current_char;
while (gnl->lst)
{
current_char = gnl->lst->buffer[gnl->lst->idx];
if (current_char == '\n' || !current_char)
break ;
(*line)[len++] = gnl->lst->buffer[gnl->lst->idx++];
if (!(gnl->lst->buffer[gnl->lst->idx]))
{
tmp = gnl->lst;
gnl->lst = gnl->lst->next;
free(tmp);
}
}
if (gnl->lst && gnl->is_nl)
gnl->lst->idx++;
return (*line);
}
char *get_next_line(int fd)
{
static t_gnl gnl[FD_MAX] = {{0, 0, 0, NULL}};
char *line;
if (fd < 0 || BUFFER_SIZE <= 0 || fd >= FD_MAX)
return (NULL);
gnl[fd].fd = fd;
gnl[fd].is_nl = 0;
gnl[fd].line_len = 0;
if (gnl_lstnew(&(gnl[fd].lst)) == NULL)
return (gnl_free(&(gnl[fd])));
if (!get_content(&(gnl[fd]), gnl[fd].lst, 0, 0))
return (gnl_free(&(gnl[fd])));
if (!gnl[fd].line_len)
return (gnl_free(&(gnl[fd])));
line = malloc(sizeof(char) * (gnl[fd].line_len + 1));
if (line == NULL)
return (gnl_free(&(gnl[fd])));
if (gnl[fd].is_nl)
line[gnl[fd].line_len - 1] = '\n';
line[gnl[fd].line_len] = '\0';
if (get_lines(&gnl[fd], 0, &line) == NULL)
return (gnl_free(&gnl[fd]));
return (line);
}