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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: marcrodr < marcrodr@student.42sp.org.br +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/02/07 22:02:58 by marcrodr #+# #+# */
/* Updated: 2022/02/14 10:06:39 by marcrodr ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static int has_line(char *buffer)
{
int i;
if (buffer)
{
i = 0;
while (buffer[i] != '\n' && buffer[i])
i++;
if (buffer[i] == '\n')
return (i);
}
return (-1);
}
static int get_buffer(int fd, char **static_buffer)
{
char *buffer;
char *tmp;
int ret;
buffer = malloc((BUFFER_SIZE + 1) * sizeof(char *));
if (!buffer)
return (-1);
ret = read(fd, buffer, BUFFER_SIZE);
while (ret > 0)
{
buffer[ret] = '\0';
if (!*static_buffer)
*static_buffer = ft_strdup(buffer);
else
{
tmp = *static_buffer;
*static_buffer = ft_strjoin(tmp, buffer);
free(tmp);
}
if (has_line(*static_buffer) >= 0)
break ;
ret = read(fd, buffer, BUFFER_SIZE);
}
free(buffer);
return (ret);
}
static void get_line(char **buffer, char **line)
{
char *tmp;
int i;
if (*buffer)
{
i = has_line(*buffer);
if (i >= 0)
{
tmp = *buffer;
*line = ft_substr(tmp, 0, i + 1);
*buffer = ft_substr(tmp, i + 1, ft_strlen(tmp));
free(tmp);
if (ft_strlen(*buffer) == 0)
{
free(*buffer);
*buffer = NULL;
}
}
else
{
*line = ft_strdup(*buffer);
free(*buffer);
*buffer = NULL;
}
}
}
char *get_next_line(int fd)
{
static char *buffer[1024];
char *line;
int ret;
if (fd < 0 || BUFFER_SIZE < 1)
return (NULL);
ret = get_buffer(fd, &buffer[fd]);
line = NULL;
if (ret == -1)
{
if (buffer[fd])
free(buffer[fd]);
}
else
get_line(&buffer[fd], &line);
return (line);
}