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get_next_line.c
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get_next_line.c
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/* ************************************************************************** */
/* */
/* :::::::: */
/* get_next_line.c :+: :+: */
/* +:+ */
/* By: dreijans <[email protected]> +#+ */
/* +#+ */
/* Created: 2023/01/09 11:35:31 by dreijans #+# #+# */
/* Updated: 2023/05/30 17:50:37 by dreijans ######## odam.nl */
/* */
/* ************************************************************************** */
#include "libft.h"
ssize_t ft_find_newline(char *str)
{
int i;
i = 0;
if (!str)
return (0);
while (str[i])
{
if (str[i] == '\n')
return (i);
i++;
}
return (-1);
}
char *ft_read_line(int fd, char *string, char *read_string)
{
int byte_read;
char *free_string;
while (ft_find_newline(read_string) == -1)
{
byte_read = read (fd, read_string, BUFFER_SIZE);
read_string[byte_read] = '\0';
if (byte_read == 0)
return (string);
if (byte_read == -1)
{
read_string[0] = '\0';
free (string);
return (0);
}
free_string = string;
string = ft_copy_join(string, read_string);
free (free_string);
if (string == NULL)
return (NULL);
}
return (string);
}
char *ft_save(char *str)
{
char *new_str;
int len;
len = ft_find_newline(str);
if (len == -1)
return (str);
new_str = ft_substr(str, 0, len + 1);
free (str);
return (new_str);
}
char *get_next_line(int fd)
{
static char read_string[BUFFER_SIZE + 1];
char *string;
int i;
string = NULL;
if (fd < 0 || BUFFER_SIZE <= 0)
return (NULL);
string = ft_copy_join(string, read_string);
if (string == NULL)
return (NULL);
string = ft_read_line(fd, string, read_string);
if (string == NULL)
return (NULL);
string = ft_save(string);
if (string == NULL)
return (NULL);
i = ft_find_newline(read_string);
ft_strlcpy(read_string, &read_string[i + 1], ft_strlen(&read_string[i]));
if (read_string[0] == '\0' && string[0] == '\0')
{
free (string);
return (NULL);
}
return (string);
}