lily/music-sequence.cc

   1 /*
   2   music-sequence.cc --  implement Music_sequence
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include "music-list.hh"
  10 #include "debug.hh"
  11 #include "pitch.hh"
  12
  13
  14 void
  15 Music_sequence::truncate (int k)
  16 {
  17   SCM l = get_mus_property ("elements");
  18   if (k == 0)
  19     {
  20       l = SCM_EOL;
  21     }
  22   else
  23     {
  24       SCM s = l;
  25       k--;
  26       for (; gh_pair_p (s) && k--; s = gh_cdr (s))
  27         ;
  28
  29       if (gh_pair_p (s))
  30         {
  31           gh_set_cdr_x (s, SCM_EOL);
  32         }
  33     }
  34   set_mus_property ("elements", l);
  35 }
  36
  37 SCM
  38 Music_sequence::music_list ()const
  39 {
  40   return get_mus_property ("elements");
  41 }
  42
  43 /*
  44   Ugh this sucks. Linear. do not use.
  45  */
  46 void
  47 Music_sequence::append_music (Music *m)
  48 {
  49   set_mus_property ("elements",
  50                     gh_append2( music_list(), gh_cons (m->self_scm (), SCM_EOL)));
  51   scm_unprotect_object (m->self_scm ());
  52 }
  53
  54 Music_sequence::Music_sequence(SCM l)
  55   : Music (l)
  56 {
  57 }
  58
  59 void
  60 Music_sequence::transpose (Pitch rq)
  61 {
  62   for (SCM s = music_list (); gh_pair_p (s);  s = gh_cdr (s))
  63     unsmob_music (gh_car (s))->transpose (rq);
  64 }
  65
  66
  67
  68
  69 Moment
  70 Music_sequence::cumulative_length () const
  71 {
  72   Moment last=0;
  73   for (SCM s = music_list (); gh_pair_p (s);  s = gh_cdr (s))
  74     last += unsmob_music (gh_car (s))->length_mom ();
  75   return  last;
  76 }
  77
  78 Pitch
  79 Music_sequence::to_relative_octave (Pitch p)
  80 {
  81   return do_relative_octave (p, false);
  82 }
  83
  84
  85 Moment
  86 Music_sequence::maximum_length () const
  87 {
  88   Moment dur = 0;
  89   for (SCM s = music_list (); gh_pair_p (s);  s = gh_cdr (s))
  90     dur = dur >? unsmob_music (gh_car (s))->length_mom ();
  91
  92   return dur;
  93 }
  94 int
  95 Music_sequence::length_i () const
  96 {
  97   return scm_ilength (music_list ());
  98 }
  99
 100 Pitch
 101 Music_sequence::do_relative_octave (Pitch p, bool ret_first)
 102 {
 103   Pitch retval;
 104   int count=0;
 105
 106   Pitch last = p;
 107   for (SCM s = music_list (); gh_pair_p (s);  s = gh_cdr (s))
 108     {
 109       last = unsmob_music (gh_car (s))->to_relative_octave (last);
 110       if (!count ++ )
 111         retval = last;
 112     }
 113
 114   if (!ret_first)
 115     retval = last;
 116
 117   return retval;
 118 }
 119
 120 void
 121 Music_sequence::compress (Moment m)
 122 {
 123   for (SCM s = music_list (); gh_pair_p (s);  s = gh_cdr (s))
 124     unsmob_music (gh_car (s))->compress (m);
 125 }