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get_next_line_bonus.c
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get_next_line_bonus.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line_bonus.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: javellis <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/11/02 14:47:29 by javellis #+# #+# */
/* Updated: 2022/11/02 14:47:31 by javellis ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "get_next_line_bonus.h"
char *ft_line_builder(char *buf)
{
int i;
int j;
char *line;
i = 0;
j = 0;
if (!buf)
return (NULL);
while (buf[i] && buf[i] != '\n')
i++;
if (buf[i] == '\0')
return (buf);
line = (char *)malloc(i + 2);
while (buf[i] && i > j)
{
line[j] = buf[j];
j++;
}
line[j++] = '\n';
line[j] = '\0';
return (line);
}
char *ft_set_new_mem(char *mem, int i)
{
char *new_mem;
int j;
j = 0;
while (mem[j])
j++;
new_mem = malloc(j - ++i + 1);
if (!new_mem)
return (NULL);
new_mem[j - i] = '\0';
j = 0;
while (mem[i])
new_mem[j++] = mem[i++];
free(mem);
if (!new_mem[0])
{
free(new_mem);
return (NULL);
}
return (new_mem);
}
char *ft_set_mem(char *mem)
{
int i;
i = 0;
if (!ft_strchr(mem, '\n'))
return (NULL);
while (mem[i] && mem[i] != '\n')
i++;
if (!mem[i])
{
free(mem);
return (NULL);
}
return (ft_set_new_mem(mem, i));
}
char *ft_read_buf(int fd, char *mem)
{
char *buffer;
int buf_read;
buf_read = 1;
buffer = ft_calloc(BUFFER_SIZE + 1, 1);
if (!buffer)
return (NULL);
while (!ft_strchr(buffer, '\n') && buf_read != 0)
{
buf_read = read(fd, buffer, BUFFER_SIZE);
if (buf_read <= 0)
{
free(buffer);
if (buf_read == 0)
return (mem);
return (NULL);
}
buffer[buf_read] = '\0';
mem = ft_strjoin(mem, buffer);
}
free(buffer);
return (mem);
}
char *get_next_line(int fd)
{
static char *mem[1024];
char *line;
if (fd < 0 || BUFFER_SIZE < 0)
return (0);
mem[fd] = ft_read_buf(fd, mem[fd]);
if (!mem[fd])
return (NULL);
line = ft_line_builder(mem[fd]);
mem[fd] = ft_set_mem(mem[fd]);
return (line);
}