97 lines
2.3 KiB
C
97 lines
2.3 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: lejulien <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/11/29 01:57:21 by lejulien #+# #+# */
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/* Updated: 2021/06/10 15:29:34 by user42 ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "get_next_line.h"
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int ft_hasnl(char *str)
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{
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int i;
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i = 0;
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if (!str || str[i] == '\0')
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return (-1);
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while (str[i] != '\0')
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{
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if (str[i] == '\n')
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return (i);
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i++;
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}
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return (-1);
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}
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char *ft_read(int fd, char **buffer)
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{
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int len;
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char *whatiread;
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char *tmp;
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len = BUFFER_SIZE;
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if (!(whatiread = malloc((BUFFER_SIZE + 1) * sizeof(char))))
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return (NULL);
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while (ft_hasnl(*buffer) == -1 && len == BUFFER_SIZE)
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{
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len = read(fd, whatiread, BUFFER_SIZE);
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whatiread[len] = 0;
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if (!(tmp = ft_strjoin(*buffer, whatiread)))
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return (NULL);
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if (*buffer != 0)
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free(*buffer);
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if (!(*buffer = ft_strdup(tmp)))
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return (NULL);
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free(tmp);
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}
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free(whatiread);
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return (*buffer);
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}
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t_char *ft_cut(char *buffer)
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{
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t_char *cut;
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int nlpos;
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if (!(cut = malloc(sizeof(t_char))))
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return (NULL);
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nlpos = ft_hasnl(buffer);
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buffer[nlpos] = '\0';
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if (!(cut->toline = ft_strdup(buffer)))
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return (NULL);
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if (!(cut->tobuff = ft_strdup(&buffer[nlpos + 1])))
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return (NULL);
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free(buffer);
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return (cut);
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}
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int get_next_line(int fd, char **line)
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{
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static char *buffer = NULL;
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t_char *res;
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if (line)
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*line = NULL;
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if (fd < 0 || BUFFER_SIZE < 1 || read(fd, NULL, 0) == -1
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|| !(buffer = ft_read(fd, &buffer)) || !line)
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return (-1);
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if (ft_hasnl(buffer) == -1)
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{
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*line = buffer;
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buffer = NULL;
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return (0);
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}
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if (!(res = ft_cut(buffer)))
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return (-1);
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*line = res->toline;
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buffer = res->tobuff;
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free(res);
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return (1);
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}
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