91 lines
2.2 KiB
C
91 lines
2.2 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: adjoly <adjoly@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/12/01 17:11:59 by adjoly #+# #+# */
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/* Updated: 2023/12/06 11:18:18 by adjoly ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "get_next_line.h"
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int check_line(char *buf)
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{
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int i;
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i = 0;
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while (buf[i] && buf[i] != '\n')
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i++;
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if (buf[i] == '\n')
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return (i + (buf[i] == '\n'));
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return (0);
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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;
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char *res;
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char *tmp;
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int size;
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int bytes_read;
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if (BUFFER_SIZE <= 0 || fd < 0)
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return (NULL);
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res = ft_calloc(1, 1);
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if (!buf)
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buf = ft_calloc(sizeof(char), BUFFER_SIZE + 1);
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while (1)
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{
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tmp = ft_strjoin(res, buf);
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if (!tmp)
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return (NULL);
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free(res);
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res = tmp;
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size = check_line(res);
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bytes_read = read(fd, buf, BUFFER_SIZE);
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buf[bytes_read] = 0;
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if (bytes_read == 0 && ft_strlen(res) != 0)
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{
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free(buf);
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buf = NULL;
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return (res);
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}
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else if (bytes_read == 0)
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return (NULL);
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if (size != 0)
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{
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tmp = ft_strjoin(res, buf);
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if (!tmp)
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return (NULL);
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free(res);
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res = tmp;
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ft_strlcpy(buf, &res[size], ft_strlen(&res[size]));
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buf[ft_strlen(&res[size])] = 0;
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res[size] = 0;
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return (res);
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}
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}
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}
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#include <unistd.h>
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void ft_putstr(char *str){if (str == NULL){return ;}int i = 0;while(str[i]){write(1, &str[i], 1);i++;}}
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#include <fcntl.h>
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#include <stdio.h>
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int main(void)
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{
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char *ln;
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int fd;
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fd = open("test.txt", O_RDONLY);
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while (1)
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{
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ln = get_next_line(fd);
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if (ln == NULL)
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return (0);
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ft_putstr(ln);
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free(ln);
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}
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}
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