120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* get_next_line.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/11/21 17:20:41 by dgaillet #+# #+# */
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/* Updated: 2025/11/27 18:19:30 by dgaillet ### ########lyon.fr */
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/* */
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/* ************************************************************************** */
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#include "get_next_line.h"
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#include <unistd.h>
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static int del_before_nl(char buf[BUFFER_SIZE])
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{
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int nl_i;
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int i;
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char *temp;
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nl_i = index_of_nl(buf, BUFFER_SIZE);
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if (nl_i >= 0)
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{
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temp = ft_substr(buf, nl_i + 1, BUFFER_SIZE - nl_i);
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if (!temp)
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return (-1);
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ft_bzero(buf, BUFFER_SIZE);
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i = 0;
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while (temp[i])
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{
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buf[i] = temp[i];
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i++;
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}
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free(temp);
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}
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return (1);
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}
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static char *ft_read_one(char buf[BUFFER_SIZE], int fd, char *str)
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{
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int temp;
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str = ft_strjoin_new(str, buf, BUFFER_SIZE);
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if (!str)
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return (NULL);
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ft_bzero(buf, BUFFER_SIZE);
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temp = read(fd, buf, BUFFER_SIZE);
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if (temp < 0)
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{
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free(str);
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return (NULL);
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}
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if ((!str || ft_strlen(str) == 0) && temp == 0)
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{
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free(str);
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return (NULL);
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}
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if (temp == 0)
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return (str);
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return (str);
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}
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static char *extract_all_nl(char buf[BUFFER_SIZE], int fd, char *str, int nl_i)
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{
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int temp;
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if (!str)
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return (NULL);
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while (nl_i < 0)
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{
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str = ft_read_one(buf, fd, str);
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if (!str)
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return (NULL);
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nl_i = index_of_nl(buf, BUFFER_SIZE);
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if (nl_i < 0 && !ft_strlen(buf))
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return (str);
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}
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str = ft_strjoin_new(str, buf, nl_i);
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if (!str)
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return (NULL);
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temp = del_before_nl(buf);
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if (temp < 0)
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{
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free(str);
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return (NULL);
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}
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return (str);
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}
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static char *ft_gnl_extra(char buf[BUFFER_SIZE], int fd)
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{
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int nl_i;
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int temp;
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char *str;
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nl_i = index_of_nl(buf, BUFFER_SIZE);
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if (nl_i >= 0)
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{
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str = ft_substr(buf, 0, nl_i + 1);
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temp = del_before_nl(buf);
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if (temp < 0)
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return (free(str), NULL);
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}
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else
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str = extract_all_nl(buf, fd, ft_substr("", 0, 1), nl_i);
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return (str);
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}
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char *get_next_line(int fd)
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{
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static char buf[BUFFER_SIZE];
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char *to_return;
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if (fd < 0)
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return (NULL);
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to_return = ft_gnl_extra(buf, fd);
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return (to_return);
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}
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