lily/key.cc

   1 /*
   2   key.cc -- implement Key, Octave_key
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8   TODO
   9   transposition.
  10 */
  11
  12 #include "key.hh"
  13 #include "debug.hh"
  14 #include "musical-pitch.hh"
  15
  16 const int NUMBER_OF_OCTAVES=14;         // ugh..
  17 const int ZEROOCTAVE=7;
  18
  19
  20 void
  21 Octave_key::print () const
  22 {
  23   for (int i= 0; i < 7 ; i++)
  24     DOUT << "note " << i << " acc: " << accidental_i_arr_[i] << '\n';
  25 }
  26
  27
  28
  29 Octave_key::Octave_key()
  30 {
  31   accidental_i_arr_.set_size (7);
  32   clear ();
  33 }
  34
  35 void
  36 Octave_key::clear ()
  37 {
  38   for (int i= 0; i < 7 ; i++)
  39     accidental_i_arr_[i] = 0;
  40 }
  41
  42 Key::Key()
  43 {
  44   multi_octave_b_ = false;
  45   octaves_.set_size (NUMBER_OF_OCTAVES);
  46 }
  47
  48 int
  49 Key::octave_to_index (int o) const
  50 {
  51   int i = o + ZEROOCTAVE;
  52   if (i < 0)
  53     {
  54       warning ("Don't have that many octaves (" + to_str (o) + ")");
  55       i = 0;
  56     }
  57   if (i >= NUMBER_OF_OCTAVES)
  58     {
  59       warning ("Don't have that many octaves (" + to_str (o) + ")");
  60       i = NUMBER_OF_OCTAVES -1;
  61     }
  62   return i;
  63 }
  64
  65 Octave_key const&
  66 Key::oct (int i) const
  67 {
  68   return octaves_[octave_to_index (i)];
  69 }
  70
  71
  72 void
  73 Octave_key::set (int i, int a)
  74 {
  75   if (a <= -3)
  76     {
  77       warning ("Underdone accidentals (" + to_str (a) + ")");
  78       a = -2;
  79     }
  80   if (a >= 3)
  81     {
  82       warning ("Overdone accidentals (" + to_str (a) + ")");
  83       a = 2;
  84     }
  85   accidental_i_arr_[i]=a;
  86 }
  87
  88 void
  89 Key::set (Musical_pitch p)
  90 {
  91   int   i = octave_to_index (p.octave_i_);
  92   octaves_[i].set (p.notename_i_,p.accidental_i_);
  93 }
  94
  95 void
  96 Key::set (int n, int a)
  97 {
  98   for (int i= 0; i < NUMBER_OF_OCTAVES ; i++)
  99     octaves_[i].set (n,a);
 100 }
 101 void
 102 Key::clear ()
 103 {
 104   for (int i= 0; i < NUMBER_OF_OCTAVES ; i++)
 105     octaves_[i].clear ();
 106 }
 107 void
 108 Key::print () const
 109 {
 110   for (int i= 0; i < NUMBER_OF_OCTAVES ; i++)
 111     {
 112       DOUT << "octave " << i - ZEROOCTAVE << " Octave_key { ";
 113       octaves_[i].print ();
 114       DOUT << "}\n";
 115     }
 116 }
 117
 118 bool
 119 Key::different_acc (Musical_pitch p)const
 120 {
 121   return oct (p.octave_i_).acc (p.notename_i_) == p.accidental_i_;
 122 }