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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/08 10:37:41 by cacharle #+# #+# */
/* Updated: 2019/10/09 16:50:40 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
#include <stdlib.h>
#include "get_next_line.h"
#include <stdio.h>
// if has rest
// store it in local_buf and read diff
// else
// read full local buf
// while no newline -> recursion
// newline -> store what is after newline
// allocate line according to stack depth
// cpy before newline at the end
// at each stack pop store local buf on the allocated line
int read_after(int fd, char *buf, char *rest_buf)
{
int offset = ft_strlen(rest_buf);
ft_strncpy(buf, rest_buf, offset);
rest_buf[0] = 0;
return (read(fd, buf + offset, BUFFER_SIZE - offset));
}
int get_next_line(int fd, char **line)
{
int split_at;
char local_buf[BUFFER_SIZE + 1];
static int buf_count = 0;
static char rest_buf[BUFFER_SIZE + 1] = "";
local_buf[0] = '\0';
if (read_after(fd, local_buf, rest_buf) == 0)
return (END_OF_FILE);
split_at = find_newline(local_buf);
if (split_at == -1)
{
buf_count++;
int ret = get_next_line(fd, line);
buf_count--;
ft_strncpy(*line + (buf_count * BUFFER_SIZE), local_buf, BUFFER_SIZE);
return (ret);
}
ft_strncpy(rest_buf, local_buf + split_at + 1, ft_strlen(local_buf) - split_at);
*line = malloc(sizeof(char) * (buf_count * BUFFER_SIZE + split_at + 1));
ft_strncpy(*line + (buf_count * BUFFER_SIZE), local_buf, split_at);
(*line)[buf_count * BUFFER_SIZE + split_at] = '\0';
return (LINE_READ);
}
#include <stdio.h>
#include <fcntl.h>
int main()
{
int fd = open("Makefile", O_RDONLY);
char *line = NULL;
/* int ret = 1; */
while (get_next_line(fd, &line) == 1)
{
printf(">%s\n", line);
free(line);
}
close(fd);
return 0;
}
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