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get_next_line.c
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get_next_line.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mkhaing <0x@bontal.net> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/10/28 00:33:39 by mkhaing #+# #+# */
/* Updated: 2024/03/13 21:08:33 by mkhaing ### ########.fr */
/* */
/* ************************************************************************** */
#include <byamc/byamc.h>
#include <byamc/gnl.h>
#include <byamc/limits.h>
char *find_new_line(char **temp_box)
{
char *withline;
char *leftovers;
int len;
len = 0;
while ((*temp_box)[len] != '\n' && (*temp_box)[len] != '\0')
len++;
if ((*temp_box)[len] == '\n')
{
withline = ft_substr(*temp_box, 0, (len + 1));
leftovers = ft_substr(*temp_box, (len + 1), ft_strlen(*temp_box) - (len
+ 1));
if (!withline || !leftovers)
{
free(withline);
free(leftovers);
return (NULL);
}
free(*temp_box);
*temp_box = leftovers;
return (withline);
}
return (NULL);
}
char *do_read(int fd)
{
char *buffer;
int bytes_read;
buffer = (char *)malloc(sizeof(char) * (GNL_BUFFER_SIZE + 1));
if (!buffer)
return (NULL);
bytes_read = read(fd, buffer, GNL_BUFFER_SIZE);
if (bytes_read <= 0)
{
free(buffer);
return (NULL);
}
buffer[bytes_read] = '\0';
return (buffer);
}
char *do_get_next_line(char **temp_box, int fd)
{
char *second_temp_box;
char *buffer;
char *processed_sentence;
processed_sentence = find_new_line(temp_box);
if (processed_sentence)
return (processed_sentence);
buffer = do_read(fd);
if (!buffer)
{
processed_sentence = ft_strdup(*temp_box);
free(*temp_box);
*temp_box = NULL;
if (*processed_sentence)
return (processed_sentence);
free(processed_sentence);
return (NULL);
}
second_temp_box = ft_strjoin(*temp_box, buffer);
free(*temp_box);
*temp_box = second_temp_box;
free(buffer);
return (do_get_next_line(temp_box, fd));
}
char *get_next_line(int fd)
{
static char *temp_box[1024];
if (fd < 0 || GNL_BUFFER_SIZE <= 0 || read(fd, NULL, 0) < 0)
{
free(temp_box[fd]);
temp_box[fd] = NULL;
return (NULL);
}
if (!temp_box[fd])
temp_box[fd] = ft_strdup("");
return (do_get_next_line(&temp_box[fd], fd));
}