get_next_line

I got it

int    get_next_line(int fd, char **line);

Reads the next line from file specified with fd and saves it to *line

Used just 3 standard C library functions

ssize_t read(int fd, void *buf, size_t count);
void    *malloc(size_t size);
void    free(void *ptr);

Features

Can be optimized for small and large files by tweaking the number of symbols to be read with one call of read function. Just change the BUFF_SIZE define

Supports multiple file descriptors, allowing you to call get_next_line for a bunch of different files in one execution

Stress tested on many, many examples and against edge cases