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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dkaiser <dkaiser@student.42heilbronn.de +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/03/15 14:13:51 by dkaiser #+# #+# */
/* Updated: 2024/03/22 16:51:40 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "get_next_line.h"
char *str_add_buffer(char *old_str, char *buf, int pos, int buf_len)
{
char *result;
int len;
int i;
if (!old_str)
len = buf_len;
else
len = ft_strlen(old_str) + buf_len;
result = malloc(sizeof(char) * len);
if (!result)
return (NULL);
result[len] = '\0';
i = 0;
while (old_str && old_str[i])
{
result[i] = old_str[i];
i++;
}
while (i < len)
result[i++] = buf[pos++];
return (result);
}
void get_next_line_rec(int fd, char *buf, char **ptr_result, int pos)
{
int len;
int i;
char *old_res;
char *result;
int readlen;
result = *ptr_result;
readlen = 0;
len = 0;
while (pos + len < BUFFER_SIZE)
{
if (buf[pos + len] == '\n')
{
len++;
break;
}
if (!buf[pos + len])
break ;
len++;
}
old_res = result;
result = str_add_buffer(old_res, buf, pos, len);
*ptr_result = result;
free(old_res);
if (!result)
return ;
i = 0;
while (i < len)
buf[pos + i++] = '\0';
if (pos + len == BUFFER_SIZE)
{
readlen = read(fd, buf, BUFFER_SIZE);
if (readlen > 0)
get_next_line_rec(fd, buf, &result, 0);
}
*ptr_result = result;
}
char *get_next_line(int fd)
{
static char buf[BUFFER_SIZE];
int i;
char *result;
int readlen;
i = 0;
readlen = 0;
result = NULL;
while (i < BUFFER_SIZE && !buf[i])
i++;
if (i == BUFFER_SIZE)
{
readlen = read(fd, buf, BUFFER_SIZE);
if (readlen > 0)
return (get_next_line(fd));
return (NULL);
}
get_next_line_rec(fd, buf, &result, i);
return (result);
}
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