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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: bjeana <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/10/23 14:32:01 by bjeana #+# #+# */
/* Updated: 2021/10/29 17:58:06 by bjeana ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdio.h>
#include <fcntl.h>
#include "get_next_line.h"
char *ft_check_ost(char *ost, char **line, char **ptr)
{
char *temp;
*ptr = ft_strchr(ost, 10);
if (ost == NULL)
{
*line = (char *)malloc(1 * sizeof(char));
if (*line == NULL)
return (NULL);
*line[0] = '\0';
}
else if (ost != NULL && *ptr != NULL)
{
*line = ft_strdup(ost, '\n');
temp = ost;
ost = ft_strdup(*ptr + 1, '\0');
free(temp);
}
else if (ost != NULL && *ptr == NULL)
{
*line = ft_strdup(ost, '\0');
free(ost);
return (NULL);
}
return (ost);
}
char *ft_free(char *line, char *str, char *ptr, int a)
{
char *temp;
if (a == -1)
{
free(line);
free(str);
return (NULL);
}
temp = line;
line = ft_strjoin(line, str);
free(temp);
if (ptr != NULL)
{
temp = line;
line = ft_strjoin(line, "\n");
free(temp);
}
return (line);
}
char *create_buf(void)
{
char *buf;
if (BUFFER_SIZE > 0)
{
buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));
if (buf == NULL)
return (NULL);
}
else
return (NULL);
return (buf);
}
int read_buf(int fd, char *buf)
{
int i;
i = read(fd, buf, BUFFER_SIZE);
buf[i] = '\0';
return (i);
}
char *get_next_line(int fd)
{
char *buf;
char *line;
char *ptr;
static char *ost;
int i;
i = 1;
buf = create_buf();
ost = ft_check_ost(ost, &line, &ptr);
while (i && ptr == NULL && buf != NULL)
{
i = read_buf(fd, buf);
if ((i == 0 && buf[0] == '\0' && line[0] == '\0') || i == -1)
return (ft_free(line, buf, ptr, -1));
ptr = ft_strchr(buf, '\n');
if (ft_strchr(buf, '\n'))
{
*ptr = '\0';
ost = ft_strdup((ptr + 1), '\0');
}
line = ft_free(line, buf, ptr, 0);
}
free(buf);
return (line);
}