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get_next_line/get_next_line.c

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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: adjoly <adjoly@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/12/01 17:11:59 by adjoly #+# #+# */
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/* Updated: 2023/12/08 11:31:04 by adjoly ### ########.fr */
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/* */
/* ************************************************************************** */
#include "get_next_line.h"
int check_line(char *buf)
{
int i;
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' || buf[i] == '\0')
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return (i + (buf[i] == '\n'));
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return (0);
}
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char *get_next_line(int fd)
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{
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static char *buf;
char *res;
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size_t size;
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int bytes_read;
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if (BUFFER_SIZE <= 0 || fd < 0)
return (NULL);
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res = ft_calloc(1, 1);
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size = BUFFER_SIZE;
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if (!buf)
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buf = malloc(sizeof(char) * (BUFFER_SIZE + 1));
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while (buf && res)
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{
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bytes_read = read(fd, buf, BUFFER_SIZE);
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size = check_line(buf);
res = ft_strljoin(res, buf, size);
// ft_strlcpy(buf, &res[size], ft_strlen(&res[size]));
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if (bytes_read < 1)
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{
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if (ft_strlen(res) > 0)
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{
free(buf);
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return (res);
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}
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free(buf);
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buf = NULL;
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return (NULL);
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}
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else if (bytes_read >= 1)
return (res);
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}
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return (NULL);
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}
#include <unistd.h>
void ft_putstr(char *str){if (str == NULL){return ;}int i = 0;while(str[i]){write(1, &str[i], 1);i++;}}
#include <fcntl.h>
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#include <stdio.h>
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int main(void)
{
char *ln;
int fd;
fd = open("test.txt", O_RDONLY);
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// while (ln != NULL)
// {
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ln = get_next_line(fd);
ft_putstr(ln);
free(ln);
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// }
close(fd);
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}