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ft_get_next_line.c
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ft_get_next_line.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_get_nex_line.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: jovicto2 <jovicto2@student.42sp.org.br> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/06/19 22:02:09 by jovicto2 #+# #+# */
/* Updated: 2023/06/19 22:04:42 by jovicto2 ### ########.fr */
/* */
/* ************************************************************************** */
#include "../includes/libft.h"
static char *ft_buffertrim(char *buffer);
static char *ft_getline(char *buffer);
static char *ft_readline(int fd, char *buffer);
char *ft_get_next_line(int fd)
{
char *line;
static char *buffer[FD_MAX];
if (fd == -1 || BUFFER_SIZE <= 0 || fd >= FD_MAX)
return (NULL);
buffer[fd] = ft_readline(fd, buffer[fd]);
if (!buffer[fd])
return (NULL);
line = ft_getline(buffer[fd]);
buffer[fd] = ft_buffertrim(buffer[fd]);
return (line);
}
static char *ft_buffertrim(char *buffer)
{
size_t buffer_index;
size_t line_index;
char *line;
buffer_index = 0;
line_index = 0;
while (buffer[buffer_index] != '\n' && buffer[buffer_index])
buffer_index++;
if (!buffer[buffer_index])
{
free(buffer);
return (NULL);
}
line = ft_calloc(ft_strlen(buffer) - buffer_index + 1, sizeof(char));
buffer_index++;
while (buffer[buffer_index])
line[line_index++] = buffer[buffer_index++];
free(buffer);
return (line);
}
static char *ft_getline(char *buffer)
{
char *line;
size_t index;
index = 0;
if (!buffer[index])
return (NULL);
while (buffer[index] != '\n' && buffer[index])
index++;
line = ft_calloc(index + 2, sizeof(char));
index = 0;
while (*buffer != '\n' && *buffer)
line[index++] = *buffer++;
if (*buffer == '\n')
line[index] = '\n';
return (line);
}
static char *ft_readline(int fd, char *buffer)
{
char *temp_buffer;
char *read_buffer;
ssize_t bytes_read;
if (!buffer)
buffer = ft_calloc(1, sizeof(char));
temp_buffer = buffer;
read_buffer = ft_calloc(BUFFER_SIZE + 1, sizeof(char));
bytes_read = 1;
while (!ft_strchr(buffer, '\n') && bytes_read > 0)
{
bytes_read = read(fd, read_buffer, BUFFER_SIZE);
if (bytes_read == -1)
{
free(read_buffer);
free(temp_buffer);
return (NULL);
}
read_buffer[bytes_read] = '\0';
temp_buffer = buffer;
buffer = ft_strjoin(temp_buffer, read_buffer);
free(temp_buffer);
}
free(read_buffer);
return (buffer);
}