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#include "libft.h"
static int st_find_newline(char *str)
{
int i;
i = -1;
while (str[++i])
if (str[i] == '\n')
return (i);
return (-1);
}
static int st_free_return(char **ptr, char **ptr2, int ret)
{
if (ptr != NULL)
{
free(*ptr);
*ptr = NULL;
}
if (ptr2 != NULL)
{
free(*ptr2);
*ptr2 = NULL;
}
return (ret);
}
static int st_read_line(int fd, char **line, char *rest)
{
int ret;
int split_at;
char *buf;
if ((buf = malloc(sizeof(char) * (FTNL_BUFFER_SIZE + 1))) == NULL)
return (st_free_return(line, NULL, FTNL_STATUS_ERROR));
while ((ret = read(fd, buf, FTNL_BUFFER_SIZE)) > 0)
{
buf[ret] = '\0';
if ((split_at = st_find_newline(buf)) != -1)
{
ft_strcpy(rest, buf + split_at + 1);
buf[split_at] = '\0';
if ((*line = ft_strjoin_free(*line, buf, 1)) == NULL)
return (st_free_return(&buf, NULL, FTNL_STATUS_ERROR));
return (st_free_return(&buf, NULL, FTNL_STATUS_LINE));
}
if ((*line = ft_strjoin_free(*line, buf, 1)) == NULL)
return (st_free_return(&buf, NULL, FTNL_STATUS_ERROR));
}
if (ret == -1)
return (st_free_return(&buf, line, FTNL_STATUS_ERROR));
return (st_free_return(&buf, NULL, ret));
}
/*
** if has rest:
** if rest has newline:
** push rest until newline in line, shift rest
** return LINE_READ
** else:
** push rest in line
**
** while can read fd in buf
** if buf has newline:
** push buf until newline in line
** push buf after newline in rest
** return LINE_READ
** push buf in line
**
** return FTNL_EOF
*/
int ft_next_line(int fd, char **line)
{
int split_at;
static char rest[OPEN_MAX][FTNL_BUFFER_SIZE + 1] = {{0}};
if (fd < 0 || fd > OPEN_MAX || line == NULL || FTNL_BUFFER_SIZE <= 0)
return (FTNL_STATUS_ERROR);
if ((*line = ft_strdup("")) == NULL)
return (FTNL_STATUS_ERROR);
if (rest[fd][0] == '\0')
return (st_read_line(fd, line, rest[fd]));
if ((split_at = st_find_newline(rest[fd])) != -1)
{
free(*line);
if ((*line = (char*)malloc(sizeof(char) * (split_at + 1))) == NULL)
return (FTNL_STATUS_ERROR);
ft_strncpy(*line, rest[fd], split_at);
(*line)[split_at] = '\0';
ft_strcpy(rest[fd], rest[fd] + split_at + 1);
return (FTNL_STATUS_LINE);
}
free(*line);
if (!(*line = (char*)malloc(sizeof(char) * (ft_strlen(rest[fd]) + 1))))
return (FTNL_STATUS_ERROR);
ft_strcpy(*line, rest[fd]);
rest[fd][0] = '\0';
return (st_read_line(fd, line, rest[fd]));
}
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