project_notes.txt

// Use standard library functions only for prototypes and for 42 replace them with your own.

// Todo: Add edge case handling.
	// What if the file doesn't exist?
	// What if the file is empty?
	// What if the file is only one line?
	// What if the file is only one line and it doesn't end with a new line?
	// What if the file is only one line and it ends with a new line?
	// What if the file is multiple lines?
	// What if the file is multiple lines and it doesn't end with a new line?
	// What if the file is multiple lines and it ends with a new line?
	// What if the file is multiple lines and it ends with multiple new lines?
	// What if the file is multiple lines and it ends with multiple new lines and the last line is empty?
	// What if the file is multiple lines and it ends with multiple new lines and the last line is not empty?
	// What if the file is multiple lines and it ends with multiple new lines and the last line is not empty and it doesn't end with a new line?
// Todo: Add error handling.
	// Check mallocs.
	// Check read.
	// Check close.
	// Check fd.
	// Check buffer size.
	// Null all pointers after free.

// Todo: Add support for multiple file descriptors.

// Steps:
// 0. Caller calls get_next_line with a file descriptor and expects a line from the file or NULL.
// 1. function entry - is buffer NULL?
	// 1.1 if it is, allocate memory, read to buf, set trailing \0 to the buffer
		// do all the checks including EOF and continue to 2.1 (if EOF return NULL)
	// 1.2 if it is not, continue to 2.1
// 2.1 check if the buffer contains a new line.
	// 2.1.1 if it does, it appends the chars including the new line and (manually add \0)
	//		// into a new_string var, shifts the buffer to the
			// left and returns the new string var to the caller (continues to 0)
	// 2.1.2 if it doesn't, it moves (strjoin)? the buffer into
			// a new_line var, reads to the buffer, sets trailing \0 to the buffer
			// and it contines until if either finds a new line or EOF (continues to 0)
// 3. caller receives a NULL pointer and knows that there is no more data to read.