675     int		    whole = (start == 1 && end == buf->b_ml.ml_line_count);  in buf_write()
676     linenr_T	    old_line_count = buf->b_ml.ml_line_count;  in buf_write()
700     if (buf->b_ml.ml_mfp == NULL)  in buf_write()
793 	int		empty_memline = (buf->b_ml.ml_mfp == NULL);  in buf_write()
883 	if (buf == NULL || (buf->b_ml.ml_mfp == NULL && !empty_memline)  in buf_write()
943 	if (buf->b_ml.ml_line_count != old_line_count)  in buf_write()
946 		end = buf->b_ml.ml_line_count;  in buf_write()
947 	    else if (buf->b_ml.ml_line_count > old_line_count)	// more lines  in buf_write()
948 		end += buf->b_ml.ml_line_count - old_line_count;  in buf_write()
951 		end -= old_line_count - buf->b_ml.ml_line_count;  in buf_write()
1639     if (end > buf->b_ml.ml_line_count)  in buf_write()
1640 	end = buf->b_ml.ml_line_count;  in buf_write()
1641     if (buf->b_ml.ml_flags & ML_EMPTY)  in buf_write()
2061 			    || (lnum == buf->b_ml.ml_line_count  in buf_write()