-Melodic_req*
-My_lily_parser::get_melodic_req (Melodic_req* melodic, int quotes)
-{
- if (relative_octave_mode_b_)
- {
- set_nearest (melodic);
- int d = melodic->pitch () - last_melodic_->pitch ();
- int shift = 0;
- if (quotes && (sign (d) == sign (quotes)))
- shift -= sign (quotes);
- if (!quotes && (abs (d) == 6))
- {
- String str = _("Octave ambiguity; assuming ");
- /*
- [TODO]
- figure this out.
-
- If the distance is exactly*) half an octave, there is
- no nearest pitch. In that case, we'll try to guess what
- composer/ typist meant.
- Firstly, we'll do this by comparing the 'notename distance':
-
- f b' % name-distance: f g a b: 3
-
- is surely a shorter notename distance than
-
- f 'b % name-distance: b c d e f: 4
-
- (should we give a warning at all, or can we safely assume
- this is a positive interval up?)
-
- *) It is conceivable that, musically speaking, the interval
- with the greater pitch-distance is thought to be smaller?
-
- */
-
- int name_delta = melodic->notename_i_ - last_melodic_->notename_i_;
- int name_near = abs (name_delta) % 7;
- int name_wrap = (7 - abs (name_delta)) % 7;
- if (name_near != name_wrap)
- shift = name_near < name_wrap ? sign (name_delta) : -sign (name_delta);
- else if (sign (last_melodic_->accidental_i_)
- != sign (melodic->accidental_i_))
- shift = last_melodic_->accidental_i_ - melodic->accidental_i_;
- else
- shift = -1;
- String name_str = notename_str (melodic);
- str += shift > 0 ? name_str + "'" : "'" + name_str;
- if (sign (d) == sign (shift))
- shift = 0;
- melodic->warning (str);
- }
- melodic->octave_i_ += quotes + shift;
- }
- else
- {
- Melodic_req nearest (*melodic);
- set_nearest (&nearest);
- melodic->octave_i_ += quotes;
-
- if (find_quarts_global_b)
- {
- int e = melodic->pitch () - nearest.pitch ();
- if (e)
- {
- int d = melodic->pitch () - last_melodic_->pitch ();
- String str = _("Interval greater than quart");
- int n = 1 + (abs (d) - 1) / 12;
- String quote_str ('\'', n);
- str += _(", relative: ");
- String name_str = notename_str (melodic);
- str += d < 0 ? quote_str + name_str : name_str + quote_str;
- melodic->warning (str);
- }
- }
- }
- delete last_melodic_;
- last_melodic_ = melodic->clone ()->musical ()->melodic ();
- return melodic;
-}
-
-void
-My_lily_parser::set_nearest (Melodic_req* melodic)
-{
- melodic->octave_i_ = last_melodic_->octave_i_;
- int d = melodic->pitch () - last_melodic_->pitch ();
- if (abs (d) > 6)
- melodic->octave_i_ -= sign (d);
-}